1
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Bonchuk AN, Georgiev PG. C2H2 proteins: Evolutionary aspects of domain architecture and diversification. Bioessays 2024; 46:e2400052. [PMID: 38873893 DOI: 10.1002/bies.202400052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 05/24/2024] [Accepted: 05/27/2024] [Indexed: 06/15/2024]
Abstract
The largest group of transcription factors in higher eukaryotes are C2H2 proteins, which contain C2H2-type zinc finger domains that specifically bind to DNA. Few well-studied C2H2 proteins, however, demonstrate their key role in the control of gene expression and chromosome architecture. Here we review the features of the domain architecture of C2H2 proteins and the likely origin of C2H2 zinc fingers. A comprehensive investigation of proteomes for the presence of proteins with multiple clustered C2H2 domains has revealed a key difference between groups of organisms. Unlike plants, transcription factors in metazoans contain clusters of C2H2 domains typically separated by a linker with the TGEKP consensus sequence. The average size of C2H2 clusters varies substantially, even between genomes of higher metazoans, and with a tendency to increase in combination with SCAN, and especially KRAB domains, reflecting the increasing complexity of gene regulatory networks.
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Affiliation(s)
- Artem N Bonchuk
- Department of the Control of Genetic Processes, Institute of Gene Biology Russian Academy of Sciences, Moscow, Russia
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Russian Academy of Sciences, Moscow, Russia
| | - Pavel G Georgiev
- Department of the Control of Genetic Processes, Institute of Gene Biology Russian Academy of Sciences, Moscow, Russia
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2
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Eigenfeld M, Lupp KFM, Schwaminger SP. Role of Natural Binding Proteins in Therapy and Diagnostics. Life (Basel) 2024; 14:630. [PMID: 38792650 PMCID: PMC11122601 DOI: 10.3390/life14050630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 05/02/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024] Open
Abstract
This review systematically investigates the critical role of natural binding proteins (NBPs), encompassing DNA-, RNA-, carbohydrate-, fatty acid-, and chitin-binding proteins, in the realms of oncology and diagnostics. In an era where cancer continues to pose significant challenges to healthcare systems worldwide, the innovative exploration of NBPs offers a promising frontier for advancing both the diagnostic accuracy and therapeutic efficacy of cancer management strategies. This manuscript provides an in-depth examination of the unique mechanisms by which NBPs interact with specific molecular targets, highlighting their potential to revolutionize cancer diagnostics and therapy. Furthermore, it discusses the burgeoning research on aptamers, demonstrating their utility as 'nucleic acid antibodies' for targeted therapy and precision diagnostics. Despite the promising applications of NBPs and aptamers in enhancing early cancer detection and developing personalized treatment protocols, this review identifies a critical knowledge gap: the need for comprehensive studies to understand the diverse functionalities and therapeutic potentials of NBPs across different cancer types and diagnostic scenarios. By bridging this gap, this manuscript underscores the importance of NBPs and aptamers in paving the way for next-generation diagnostics and targeted cancer treatments.
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Affiliation(s)
- Marco Eigenfeld
- Otto-Loewi Research Center, Division of Medicinal Chemistry, Medical University of Graz, Neue Stiftingtalstraße 6, 8010 Graz, Austria
| | - Kilian F. M. Lupp
- Otto-Loewi Research Center, Division of Medicinal Chemistry, Medical University of Graz, Neue Stiftingtalstraße 6, 8010 Graz, Austria
| | - Sebastian P. Schwaminger
- Otto-Loewi Research Center, Division of Medicinal Chemistry, Medical University of Graz, Neue Stiftingtalstraße 6, 8010 Graz, Austria
- BioTechMed-Graz, Mozartgasse 12/II, 8010 Graz, Austria
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3
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Chen Y, Wu Y, Li J, Chen K, Wang W, Ye Z, Feng K, Yang Y, Xu Y, Kang J, Guo X. Cooperative regulation of Zhx1 and hnRNPA1 drives the cardiac progenitor-specific transcriptional activation during cardiomyocyte differentiation. Cell Death Discov 2023; 9:244. [PMID: 37452012 PMCID: PMC10349095 DOI: 10.1038/s41420-023-01548-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 06/22/2023] [Accepted: 07/05/2023] [Indexed: 07/18/2023] Open
Abstract
The zinc finger proteins (ZNFs) mediated transcriptional regulation is critical for cell fate transition. However, it is still unclear how the ZNFs realize their specific regulatory roles in the stage-specific determination of cardiomyocyte differentiation. Here, we reported that the zinc fingers and homeoboxes 1 (Zhx1) protein, transiently expressed during the cell fate transition from mesoderm to cardiac progenitors, was indispensable for the proper cardiomyocyte differentiation of mouse and human embryonic stem cells. Moreover, Zhx1 majorly promoted the specification of cardiac progenitors via interacting with hnRNPA1 and co-activated the transcription of a wide range of genes. In-depth mechanistic studies showed that Zhx1 was bound with hnRNPA1 by the amino acid residues (Thr111-His120) of the second Znf domain, thus participating in the formation of cardiac progenitors. Together, our study highlights the unrevealed interaction of Zhx1/hnRNPA1 for activating gene transcription during cardiac progenitor specification and also provides new evidence for the specificity of cell fate determination in cardiomyocyte differentiation.
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Affiliation(s)
- Yang Chen
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, National Stem Cell Translational Resource Center, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Yukang Wu
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, National Stem Cell Translational Resource Center, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Jianguo Li
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, National Stem Cell Translational Resource Center, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Kai Chen
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, National Stem Cell Translational Resource Center, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Wuchan Wang
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, National Stem Cell Translational Resource Center, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Zihui Ye
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, National Stem Cell Translational Resource Center, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Ke Feng
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, National Stem Cell Translational Resource Center, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Yiwei Yang
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, National Stem Cell Translational Resource Center, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Yanxin Xu
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, National Stem Cell Translational Resource Center, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China
| | - Jiuhong Kang
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, National Stem Cell Translational Resource Center, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China.
| | - Xudong Guo
- Clinical and Translational Research Center of Shanghai First Maternity and Infant Hospital, Shanghai Key Laboratory of Maternal Fetal Medicine, Shanghai Key Laboratory of Signaling and Disease Research, Frontier Science Center for Stem Cell Research, National Stem Cell Translational Resource Center, School of Life Sciences and Technology, Tongji University, Shanghai, 200092, China.
- Institute for Advanced Study, Tongji University, Shanghai, 200092, China.
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Gao L, Zhang Z, Zheng X, Wang F, Deng Y, Zhang Q, Wang G, Zhang Y, Liu X. The Novel Role of Zfp296 in Mammalian Embryonic Genome Activation as an H3K9me3 Modulator. Int J Mol Sci 2023; 24:11377. [PMID: 37511136 PMCID: PMC10379624 DOI: 10.3390/ijms241411377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 07/05/2023] [Accepted: 07/05/2023] [Indexed: 07/30/2023] Open
Abstract
The changes in epigenetic modifications during early embryonic development significantly impact mammalian embryonic genome activation (EGA) and are species-conserved to some degree. Here, we reanalyzed the published RNA-Seq of human, mouse, and goat early embryos and found that Zfp296 (zinc finger protein 296) expression was higher at the EGA stage than at the oocyte stage in all three species (adjusted p-value < 0.05 |log2(foldchange)| ≥ 1). Subsequently, we found that Zfp296 was conserved across human, mouse, goat, sheep, pig, and bovine embryos. In addition, we identified that ZFP296 interacts with the epigenetic regulators KDM5B, SMARCA4, DNMT1, DNMT3B, HP1β, and UHRF1. The Cys2-His2(C2H2) zinc finger domain TYPE2 TYPE3 domains of ZFP296 co-regulated the modification level of the trimethylation of lysine 9 on the histone H3 protein subunit (H3K9me3). According to ChIP-seq analysis, ZFP296 was also enriched in Trim28, Suv39h1, Setdb1, Kdm4a, and Ehmt2 in the mESC genome. Then, knockdown of the expression of Zfp296 at the late zygote of the mouse led to the early developmental arrest of the mouse embryos and failure resulting from a decrease in H3K9me3. Together, our results reveal that Zfp296 is an H3K9me3 modulator which is essential to the embryonic genome activation of mouse embryos.
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Affiliation(s)
- Lu Gao
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China
- State Key Laboratory for Biology of Livestock, Northwest A&F University, Xianyang 712100, China
| | - Zihan Zhang
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China
- State Key Laboratory for Biology of Livestock, Northwest A&F University, Xianyang 712100, China
| | - Xiaoman Zheng
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China
- State Key Laboratory for Biology of Livestock, Northwest A&F University, Xianyang 712100, China
| | - Fan Wang
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China
- State Key Laboratory for Biology of Livestock, Northwest A&F University, Xianyang 712100, China
| | - Yi Deng
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China
- State Key Laboratory for Biology of Livestock, Northwest A&F University, Xianyang 712100, China
| | - Qian Zhang
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China
- State Key Laboratory for Biology of Livestock, Northwest A&F University, Xianyang 712100, China
| | - Guoyan Wang
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China
- State Key Laboratory for Biology of Livestock, Northwest A&F University, Xianyang 712100, China
| | - Yong Zhang
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China
- State Key Laboratory for Biology of Livestock, Northwest A&F University, Xianyang 712100, China
| | - Xu Liu
- College of Veterinary Medicine, Northwest A&F University, Xianyang 712100, China
- State Key Laboratory for Biology of Livestock, Northwest A&F University, Xianyang 712100, China
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Ding H, Yang Z, Zai Z, Feng K, Wang L, Yue Y, Yang X. Genome-Wide Analysis of ZAT Gene Family in Osmanthus fragrans and the Function Exploration of OfZAT35 in Cold Stress. PLANTS (BASEL, SWITZERLAND) 2023; 12:2346. [PMID: 37375971 DOI: 10.3390/plants12122346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 06/04/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023]
Abstract
Osmanthus fragrans is a popular ornamental and odorant plant with high commercial value, but its cultivation and exploitation are limited by low temperature. The ZAT (zinc finger of Arabidopsis thaliana) genes as a subclass of the C2H2-type zinc finger proteins (C2H2-ZFP) family play essential roles in various abiotic stresses. However, their roles in cold stress response in O. fragrans remain unclear. This study identified 38 OfZATs, which could be divided into 5 subgroups based on the phylogenetic tree, with OfZATs in the same subgroup harboring similar gene structures and motif patterns. In addition, 49 segmental and 5 tandem duplication events were detected among OfZAT genes, while some OfZAT genes exhibited specific expression patterns in different tissues. Furthermore, two OfZATs were induced in salt stress and eight OfZATs responded to cold stress. Interestingly, OfZAT35 showed a continuously increasing expression trend under cold stress, while its protein showed nucleus localization with no transcriptional activation activity. Transiently transformed tobacco overexpressing OfZAT35 exhibited a significantly higher relative electrolyte leakage (REL) level and increased activities of superoxide dismutase (SOD), peroxidase (POD), and Ascorbate peroxidase (APX), while there was significantly decreased activity of catalase (CAT). Moreover, CAT, DREB3, and LEA5, which are associated with cold stress, were dramatically decreased after cold treatment in transiently transformed tobacco, suggesting that overexpression of OfZAT35 negatively regulated cold stress. This study provides a basis for exploring the roles of ZAT genes and contributes to uncovering the mechanism of ZAT-mediated cold stress response in O. fragrans.
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Affiliation(s)
- Huifen Ding
- Key Laboratory of Landscape Architecture, Jiangsu Province, College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Zhandong Yang
- Key Laboratory of Landscape Architecture, Jiangsu Province, College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Zhouying Zai
- Key Laboratory of Landscape Architecture, Jiangsu Province, College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Keyi Feng
- Key Laboratory of Landscape Architecture, Jiangsu Province, College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Lianggui Wang
- Key Laboratory of Landscape Architecture, Jiangsu Province, College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Yuanzheng Yue
- Key Laboratory of Landscape Architecture, Jiangsu Province, College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
| | - Xiulian Yang
- Key Laboratory of Landscape Architecture, Jiangsu Province, College of Landscape Architecture, Nanjing Forestry University, Nanjing 210037, China
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
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Gupta S, Kumar A, Tamuli R. CRZ1 transcription factor is involved in cell survival, stress tolerance, and virulence in fungi. J Biosci 2022. [DOI: 10.1007/s12038-022-00294-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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7
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El Abdellaoui-Soussi F, Yunes-Leites PS, López-Maderuelo D, García-Marqués F, Vázquez J, Redondo JM, Gómez-del Arco P. Interplay between the Chd4/NuRD Complex and the Transcription Factor Znf219 Control Cardiac Cell Identity. Int J Mol Sci 2022; 23:ijms23179565. [PMID: 36076959 PMCID: PMC9455175 DOI: 10.3390/ijms23179565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/19/2022] [Accepted: 08/21/2022] [Indexed: 11/16/2022] Open
Abstract
The sarcomere regulates striated muscle contraction. This structure is composed of several myofibril proteins, isoforms of which are encoded by genes specific to either the heart or skeletal muscle. The chromatin remodeler complex Chd4/NuRD regulates the transcriptional expression of these specific sarcomeric programs by repressing genes of the skeletal muscle sarcomere in the heart. Aberrant expression of skeletal muscle genes induced by the loss of Chd4 in the heart leads to sudden death due to defects in cardiomyocyte contraction that progress to arrhythmia and fibrosis. Identifying the transcription factors (TFs) that recruit Chd4/NuRD to repress skeletal muscle genes in the myocardium will provide important information for understanding numerous cardiac pathologies and, ultimately, pinpointing new therapeutic targets for arrhythmias and cardiomyopathies. Here, we sought to find Chd4 interactors and their function in cardiac homeostasis. We therefore describe a physical interaction between Chd4 and the TF Znf219 in cardiac tissue. Znf219 represses the skeletal-muscle sarcomeric program in cardiomyocytes in vitro and in vivo, similarly to Chd4. Aberrant expression of skeletal-muscle sarcomere proteins in mouse hearts with knocked down Znf219 translates into arrhythmias, accompanied by an increase in PR interval. These data strongly suggest that the physical and genetic interaction of Znf219 and Chd4 in the mammalian heart regulates cardiomyocyte identity and myocardial contraction.
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Affiliation(s)
- Fadoua El Abdellaoui-Soussi
- Institute for Rare Diseases Research, Instituto de Salud Carlos III (ISCIII), 28222 Madrid, Spain
- Gene Regulation in Cardiovascular Remodelling and Inflammation Laboratory, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), 28029 Madrid, Spain
| | - Paula S. Yunes-Leites
- Gene Regulation in Cardiovascular Remodelling and Inflammation Laboratory, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
| | - Dolores López-Maderuelo
- Gene Regulation in Cardiovascular Remodelling and Inflammation Laboratory, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
| | - Fernando García-Marqués
- Cardiovascular Proteomics Laboratory, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), 28029 Madrid, Spain
| | - Jesús Vázquez
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
- Cardiovascular Proteomics Laboratory, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), 28029 Madrid, Spain
| | - Juan Miguel Redondo
- Gene Regulation in Cardiovascular Remodelling and Inflammation Laboratory, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), 28029 Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
| | - Pablo Gómez-del Arco
- Institute for Rare Diseases Research, Instituto de Salud Carlos III (ISCIII), 28222 Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
- Correspondence:
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ZNF655 accelerates progression of pancreatic cancer by promoting the binding of E2F1 and CDK1. Oncogenesis 2022; 11:44. [PMID: 35927248 PMCID: PMC9352668 DOI: 10.1038/s41389-022-00418-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 07/04/2022] [Accepted: 07/11/2022] [Indexed: 11/23/2022] Open
Abstract
Pancreatic cancer has an extremely terrible prognosis and is a common cause of cancer death. In this study, the clinic value, biological function and underlying mechanisms of Zinc finger protein 655 (ZNF655) in human pancreatic cancer were evaluated. The expression level of ZNF655 in pancreatic cancer was determined by immunohistochemistry (IHC) staining. The biological effects of ZNF655 in pancreatic cancer cells was investigated by loss/gain-of-function assays in vitro and in vivo. The downstream molecular mechanism of ZNF655 was explored using co-immunoprecipitation (Co-IP), dual-luciferase reporter and chromatin immunoprecipitation (Ch-IP). ZNF655 expression was significantly elevated in human pancreatic cancer and possessed clinical value in predicting poor prognosis. Functionally, ZNF655 knockdown inhibited the biological progression of pancreatic cancer cells, which was characterized by weaken proliferation, enhanced apoptosis, arrested cell cycle in G2, impeded migration, and suppressed tumor growth. Mechanistically, ZNF655 played an important role in promoting the binding of E2F transcription factor 1 (E2F1) to the cyclin-dependent kinase 1 (CDK1) promoter. Furthermore, knockdown of CDK1 alleviated the promoting effects of ZNF655 overexpression in pancreatic cancer cells. The promotive role of ZNF655 in pancreatic cancer via CDK1 was determined, which drew further interest regarding its clinical application as a promising therapeutic target.
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Weiss A, Murdoch CC, Edmonds KA, Jordan MR, Monteith AJ, Perera YR, Rodríguez Nassif AM, Petoletti AM, Beavers WN, Munneke MJ, Drury SL, Krystofiak ES, Thalluri K, Wu H, Kruse ARS, DiMarchi RD, Caprioli RM, Spraggins JM, Chazin WJ, Giedroc DP, Skaar EP. Zn-regulated GTPase metalloprotein activator 1 modulates vertebrate zinc homeostasis. Cell 2022; 185:2148-2163.e27. [PMID: 35584702 DOI: 10.1016/j.cell.2022.04.011] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 02/07/2022] [Accepted: 04/07/2022] [Indexed: 12/13/2022]
Abstract
Zinc (Zn) is an essential micronutrient and cofactor for up to 10% of proteins in living organisms. During Zn limitation, specialized enzymes called metallochaperones are predicted to allocate Zn to specific metalloproteins. This function has been putatively assigned to G3E GTPase COG0523 proteins, yet no Zn metallochaperone has been experimentally identified in any organism. Here, we functionally characterize a family of COG0523 proteins that is conserved across vertebrates. We identify Zn metalloprotease methionine aminopeptidase 1 (METAP1) as a COG0523 client, leading to the redesignation of this group of COG0523 proteins as the Zn-regulated GTPase metalloprotein activator (ZNG1) family. Using biochemical, structural, genetic, and pharmacological approaches across evolutionarily divergent models, including zebrafish and mice, we demonstrate a critical role for ZNG1 proteins in regulating cellular Zn homeostasis. Collectively, these data reveal the existence of a family of Zn metallochaperones and assign ZNG1 an important role for intracellular Zn trafficking.
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Affiliation(s)
- Andy Weiss
- Department of Pathology, Microbiology, and Immunology, Vanderbilt Institute for Infection, Immunology and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Caitlin C Murdoch
- Department of Pathology, Microbiology, and Immunology, Vanderbilt Institute for Infection, Immunology and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | | | - Matthew R Jordan
- Department of Chemistry, Indiana University, Bloomington, IN 47405, USA; Department of Molecular and Cellular Biochemistry, Indiana University, Bloomington, IN 47405, USA
| | - Andrew J Monteith
- Department of Pathology, Microbiology, and Immunology, Vanderbilt Institute for Infection, Immunology and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Yasiru R Perera
- Departments of Biochemistry and Chemistry, Center for Structural Biology, Vanderbilt University, Nashville, TN 37240, USA
| | - Aslin M Rodríguez Nassif
- Departments of Biochemistry and Chemistry, Center for Structural Biology, Vanderbilt University, Nashville, TN 37240, USA
| | - Amber M Petoletti
- Department of Pathology, Microbiology, and Immunology, Vanderbilt Institute for Infection, Immunology and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - William N Beavers
- Department of Pathology, Microbiology, and Immunology, Vanderbilt Institute for Infection, Immunology and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Matthew J Munneke
- Department of Pathology, Microbiology, and Immunology, Vanderbilt Institute for Infection, Immunology and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Sydney L Drury
- Department of Pathology, Microbiology, and Immunology, Vanderbilt Institute for Infection, Immunology and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA
| | - Evan S Krystofiak
- Cell Imaging Shared Resource, Vanderbilt University, Nashville, TN 37232, USA
| | - Kishore Thalluri
- Department of Chemistry, Indiana University, Bloomington, IN 47405, USA
| | - Hongwei Wu
- Department of Chemistry, Indiana University, Bloomington, IN 47405, USA
| | - Angela R S Kruse
- Departments of Chemistry and Biochemistry, Mass Spectrometry Research Center, Vanderbilt University, Nashville, TN 37235, USA
| | | | - Richard M Caprioli
- Departments of Chemistry and Biochemistry, Mass Spectrometry Research Center, Vanderbilt University, Nashville, TN 37235, USA
| | - Jeffrey M Spraggins
- Departments of Chemistry and Biochemistry, Mass Spectrometry Research Center, Vanderbilt University, Nashville, TN 37235, USA; Department of Cell and Developmental Biology, Vanderbilt University, Nashville, TN 37232, USA
| | - Walter J Chazin
- Departments of Biochemistry and Chemistry, Center for Structural Biology, Vanderbilt University, Nashville, TN 37240, USA
| | - David P Giedroc
- Department of Chemistry, Indiana University, Bloomington, IN 47405, USA; Department of Molecular and Cellular Biochemistry, Indiana University, Bloomington, IN 47405, USA.
| | - Eric P Skaar
- Department of Pathology, Microbiology, and Immunology, Vanderbilt Institute for Infection, Immunology and Inflammation, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
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10
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Tikhonova E, Mariasina S, Efimov S, Polshakov V, Maksimenko O, Georgiev P, Bonchuk A. Structural basis for interaction between CLAMP and MSL2 proteins involved in the specific recruitment of the dosage compensation complex in Drosophila. Nucleic Acids Res 2022; 50:6521-6531. [PMID: 35648444 PMCID: PMC9226498 DOI: 10.1093/nar/gkac455] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Revised: 04/26/2022] [Accepted: 05/30/2022] [Indexed: 12/02/2022] Open
Abstract
Transcriptional regulators select their targets from a large pool of similar genomic sites. The binding of the Drosophila dosage compensation complex (DCC) exclusively to the male X chromosome provides insight into binding site selectivity rules. Previous studies showed that the male-specific organizer of the complex, MSL2, and ubiquitous DNA-binding protein CLAMP directly interact and play an important role in the specificity of X chromosome binding. Here, we studied the highly specific interaction between the intrinsically disordered region of MSL2 and the N-terminal zinc-finger C2H2-type (C2H2) domain of CLAMP. We obtained the NMR structure of the CLAMP N-terminal C2H2 zinc finger, which has a classic C2H2 zinc-finger fold with a rather unusual distribution of residues typically used in DNA recognition. Substitutions of residues in this C2H2 domain had the same effect on the viability of males and females, suggesting that it plays a general role in CLAMP activity. The N-terminal C2H2 domain of CLAMP is highly conserved in insects. However, the MSL2 region involved in the interaction is conserved only within the Drosophila genus, suggesting that this interaction emerged during the evolution of a mechanism for the specific recruitment of the DCC on the male X chromosome in Drosophilidae.
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Affiliation(s)
- Evgeniya Tikhonova
- Department of the Control of Genetic Processes, Institute of Gene Biology, Moscow 119334, Russia
| | - Sofia Mariasina
- Center for Magnetic Tomography and Spectroscopy, Faculty of Fundamental Medicine, M.V. Lomonosov Moscow State University, Moscow 119991, Russia
| | - Sergey Efimov
- NMR Laboratory, Institute of Physics, Kazan Federal University, Kazan 420008, Russia
| | - Vladimir Polshakov
- Center for Magnetic Tomography and Spectroscopy, Faculty of Fundamental Medicine, M.V. Lomonosov Moscow State University, Moscow 119991, Russia
| | - Oksana Maksimenko
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Moscow 119334, Russia
| | - Pavel Georgiev
- Department of the Control of Genetic Processes, Institute of Gene Biology, Moscow 119334, Russia
| | - Artem Bonchuk
- Department of the Control of Genetic Processes, Institute of Gene Biology, Moscow 119334, Russia.,Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Moscow 119334, Russia
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11
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Dreab A, Bayse CA. Molecular Dynamics Simulations of Reduced and Oxidized TFIIIA Zinc Fingers Free and Interacting with 5S RNA. J Chem Inf Model 2022; 62:903-913. [PMID: 35143196 DOI: 10.1021/acs.jcim.1c01272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Interactions of zinc finger (ZF) proteins with nucleic acids and proteins play an important role in DNA transcription and repair, biochemical recognition, and protein regulation. The release of Zn2+ through oxidation of cysteine thiolates is associated with disruption of gene expression and DNA repair, preventing tumor growth. Multi-microsecond molecular dynamics (MD) simulations were carried out to examine the effect of Cys oxidation on the ZF456 fragment of transcription factor III A (TFIIIA) and its complex with 5S RNA. In the absence of 5S RNA, the reduced ZF456 peptide undergoes conformational changes in the secondary structure due to the reorientation of the intact ZF domains. Upon oxidation, the individual ZF domains unfold to various degrees, yielding a globular ZF456 peptide with ZF4 and ZF6, responsible for base-specific hydrogen bonds with 5S RNA, losing their ββα-folds. ZF5, on the other hand, participates in nonspecific interactions through its α-helix that conditionally unravels early in the simulation. In the presence of RNA, oxidation of the ZF456 peptide disrupts the key hydrogen bonding interactions between ZF5/ZF6 and 5S RNA. However, interactions with ZF4 are dependent on the protonation state of His119.
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Affiliation(s)
- Ana Dreab
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
| | - Craig A Bayse
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, Virginia 23529, United States
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12
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Genetic architecture of motor neuron diseases. J Neurol Sci 2021; 434:120099. [PMID: 34965490 DOI: 10.1016/j.jns.2021.120099] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 11/26/2021] [Accepted: 12/14/2021] [Indexed: 12/18/2022]
Abstract
Motor neuron diseases (MNDs) are rare and frequently fatal neurological disorders in which motor neurons within the brainstem and spinal cord regions slowly die. MNDs are primarily caused by genetic mutations, and > 100 different mutant genes in humans have been discovered thus far. Given the fact that many more MND-related genes have yet to be discovered, the growing body of genetic evidence has offered new insights into the diverse cellular and molecular mechanisms involved in the aetiology and pathogenesis of MNDs. This search may aid in the selection of potential candidate genes for future investigation and, eventually, may open the door to novel interventions to slow down disease progression. In this review paper, we have summarized detailed existing research findings of different MNDs, such as amyotrophic lateral sclerosis (ALS), spinal muscular atrophy (SMA), spinal bulbar muscle atrophy (SBMA) and hereditary spastic paraplegia (HSP) in relation to their complex genetic architecture.
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13
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Bu S, Lv Y, Liu Y, Qiao S, Wang H. Zinc Finger Proteins in Neuro-Related Diseases Progression. Front Neurosci 2021; 15:760567. [PMID: 34867169 PMCID: PMC8637543 DOI: 10.3389/fnins.2021.760567] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 10/11/2021] [Indexed: 01/02/2023] Open
Abstract
Zinc finger proteins (ZNF) are among the most abundant proteins in eukaryotic genomes. It contains several zinc finger domains that can selectively bind to certain DNA or RNA and associate with proteins, therefore, ZNF can regulate gene expression at the transcriptional and translational levels. In terms of neurological diseases, numerous studies have shown that many ZNF are associated with neurological diseases. The purpose of this review is to summarize the types and roles of ZNF in neuropsychiatric disorders. We will describe the structure and classification of ZNF, then focus on the pathophysiological role of ZNF in neuro-related diseases and summarize the mechanism of action of ZNF in neuro-related diseases.
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Affiliation(s)
- Siyuan Bu
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, China
| | - Yihan Lv
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, China
| | - Yusheng Liu
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, China
| | - Sen Qiao
- Department of Pharmacology, Center for Molecular Signaling (PZMS), School of Medicine, Saarland University, Homburg, Germany
| | - Hongmei Wang
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, China
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14
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Jovanovic VM, Sarfert M, Reyna-Blanco CS, Indrischek H, Valdivia DI, Shelest E, Nowick K. Positive Selection in Gene Regulatory Factors Suggests Adaptive Pleiotropic Changes During Human Evolution. Front Genet 2021; 12:662239. [PMID: 34079582 PMCID: PMC8166252 DOI: 10.3389/fgene.2021.662239] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 04/19/2021] [Indexed: 01/09/2023] Open
Abstract
Gene regulatory factors (GRFs), such as transcription factors, co-factors and histone-modifying enzymes, play many important roles in modifying gene expression in biological processes. They have also been proposed to underlie speciation and adaptation. To investigate potential contributions of GRFs to primate evolution, we analyzed GRF genes in 27 publicly available primate genomes. Genes coding for zinc finger (ZNF) proteins, especially ZNFs with a Krüppel-associated box (KRAB) domain were the most abundant TFs in all genomes. Gene numbers per TF family differed between all species. To detect signs of positive selection in GRF genes we investigated more than 3,000 human GRFs with their more than 70,000 orthologs in 26 non-human primates. We implemented two independent tests for positive selection, the branch-site-model of the PAML suite and aBSREL of the HyPhy suite, focusing on the human and great ape branch. Our workflow included rigorous procedures to reduce the number of false positives: excluding distantly similar orthologs, manual corrections of alignments, and considering only genes and sites detected by both tests for positive selection. Furthermore, we verified the candidate sites for selection by investigating their variation within human and non-human great ape population data. In order to approximately assign a date to positively selected sites in the human lineage, we analyzed archaic human genomes. Our work revealed with high confidence five GRFs that have been positively selected on the human lineage and one GRF that has been positively selected on the great ape lineage. These GRFs are scattered on different chromosomes and have been previously linked to diverse functions. For some of them a role in speciation and/or adaptation can be proposed based on the expression pattern or association with human diseases, but it seems that they all contributed independently to human evolution. Four of the positively selected GRFs are KRAB-ZNF proteins, that induce changes in target genes co-expression and/or through arms race with transposable elements. Since each positively selected GRF contains several sites with evidence for positive selection, we suggest that these GRFs participated pleiotropically to phenotypic adaptations in humans.
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Affiliation(s)
- Vladimir M Jovanovic
- Human Biology and Primate Evolution, Freie Universität Berlin, Berlin, Germany.,Bioinformatics Solution Center, Freie Universität Berlin, Berlin, Germany
| | - Melanie Sarfert
- Human Biology and Primate Evolution, Freie Universität Berlin, Berlin, Germany
| | - Carlos S Reyna-Blanco
- Department of Biology, University of Fribourg, Fribourg, Switzerland.,Swiss Institute of Bioinformatics, Fribourg, Switzerland
| | - Henrike Indrischek
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden, Germany.,Max Planck Institute for the Physics of Complex Systems, Dresden, Germany.,Center for Systems Biology Dresden, Dresden, Germany
| | - Dulce I Valdivia
- Evolutionary Genomics Laboratory and Genome Topology and Regulation Laboratory, Genetic Engineering Department, Center for Research and Advanced Studies of the National Polytechnic Institute (CINVESTAV-Irapuato), Irapuato, Mexico
| | - Ekaterina Shelest
- Centre for Enzyme Innovation, University of Portsmouth, Portsmouth, United Kingdom
| | - Katja Nowick
- Human Biology and Primate Evolution, Freie Universität Berlin, Berlin, Germany
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15
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Charrier A, Xu X, Guan BJ, Ngo J, Wynshaw-Boris A, Hatzoglou M, Buchner DA. Adipocyte-specific deletion of zinc finger protein 407 results in lipodystrophy and insulin resistance in mice. Mol Cell Endocrinol 2021; 521:111109. [PMID: 33285243 PMCID: PMC7813145 DOI: 10.1016/j.mce.2020.111109] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 11/08/2020] [Accepted: 11/30/2020] [Indexed: 01/04/2023]
Abstract
PPARγ deficiency in humans and model organisms impairs the transcriptional control of adipogenesis and mature adipocyte function resulting in lipodystrophy and insulin resistance. Zinc finger protein 407 (ZFP407) positively regulates PPARγ target gene expression and insulin-stimulated glucose uptake in cultured adipocytes. The in vivo physiological role of ZFP407 in mature adipocytes, however, remains to be elucidated. Here we generated adipocyte-specific ZFP407 knockout (AZKO) mice and discovered a partial lipodystrophic phenotype with reduced fat mass, hypertrophic adipocytes in inguinal and brown adipose tissue, and reduced adipogenic gene expression. The lipodystrophy was further exacerbated in AZKO mice fed a high-fat diet. Glucose and insulin tolerance tests revealed decreased insulin sensitivity in AZKO mice compared to control littermates. Cell-based assays demonstrated that ZFP407 is also required for adipogenesis, which may also contribute to the lipodystrophic phenotype. These results demonstrate an essential in vivo role of ZFP407 in brown and white adipose tissue formation and organismal insulin sensitivity.
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Affiliation(s)
- Alyssa Charrier
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
| | - Xuan Xu
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
| | - Bo-Jhih Guan
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
| | - Justine Ngo
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
| | - Anthony Wynshaw-Boris
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
| | - Maria Hatzoglou
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA
| | - David A Buchner
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, OH, 44106, USA.
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16
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Caudron-Herger M, Jansen RE, Wassmer E, Diederichs S. RBP2GO: a comprehensive pan-species database on RNA-binding proteins, their interactions and functions. Nucleic Acids Res 2021; 49:D425-D436. [PMID: 33196814 PMCID: PMC7778890 DOI: 10.1093/nar/gkaa1040] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 10/01/2020] [Accepted: 10/28/2020] [Indexed: 02/06/2023] Open
Abstract
RNA-protein complexes have emerged as central players in numerous key cellular processes with significant relevance in health and disease. To further deepen our knowledge of RNA-binding proteins (RBPs), multiple proteome-wide strategies have been developed to identify RBPs in different species leading to a large number of studies contributing experimentally identified as well as predicted RBP candidate catalogs. However, the rapid evolution of the field led to an accumulation of isolated datasets, hampering the access and comparison of their valuable content. Moreover, tools to link RBPs to cellular pathways and functions were lacking. Here, to facilitate the efficient screening of the RBP resources, we provide RBP2GO (https://RBP2GO.DKFZ.de), a comprehensive database of all currently available proteome-wide datasets for RBPs across 13 species from 53 studies including 105 datasets identifying altogether 22 552 RBP candidates. These are combined with the information on RBP interaction partners and on the related biological processes, molecular functions and cellular compartments. RBP2GO offers a user-friendly web interface with an RBP scoring system and powerful advanced search tools allowing forward and reverse searches connecting functions and RBPs to stimulate new research directions.
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Affiliation(s)
- Maiwen Caudron-Herger
- Division of RNA Biology & Cancer, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Ralf E Jansen
- Division of RNA Biology & Cancer, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Elsa Wassmer
- Division of RNA Biology & Cancer, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany
| | - Sven Diederichs
- Division of RNA Biology & Cancer, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany.,Division of Cancer Research, Department of Thoracic Surgery, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, German Cancer Consortium (DKTK) - Partner Site Freiburg, 79106 Freiburg, Germany
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17
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Abstract
RNA-binding proteins (RBPs) are essential factors required for the physiological function of neurons, muscle, and other tissue types. In keeping with this, a growing body of genetic, clinical, and pathological evidence indicates that RBP dysfunction and/or gene mutation leads to neurodegeneration and myopathy. Here, we summarize the current understanding of matrin 3 (MATR3), a poorly understood RBP implicated not only in ALS and frontotemporal dementia but also in distal myopathy. We begin by reviewing MATR3's functions, its regulation, and how it may be involved in both sporadic and familial neuromuscular disease. We also discuss insights gleaned from cellular and animal models of MATR3 pathogenesis, the links between MATR3 and other disease-associated RBPs, and the mechanisms underlying RBP-mediated disorders.
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Affiliation(s)
- Ahmed M. Malik
- Medical Scientist Training Program
- Neuroscience Graduate Program, and
| | - Sami J. Barmada
- Neuroscience Graduate Program, and
- Department of Neurology, University of Michigan, Ann Arbor, Michigan, USA
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18
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RNA-binding protein SORBS2 suppresses clear cell renal cell carcinoma metastasis by enhancing MTUS1 mRNA stability. Cell Death Dis 2020; 11:1056. [PMID: 33311452 PMCID: PMC7732854 DOI: 10.1038/s41419-020-03268-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/18/2020] [Accepted: 11/20/2020] [Indexed: 12/27/2022]
Abstract
RNA-binding proteins (RBPs) predominantly contribute to abnormal posttranscriptional gene modulation and disease progression in cancer. Sorbin and SH3 domain-containing 2 (SORBS2), an RBP, has been reported to be a potent tumor suppressor in several cancer types. Through integrative analysis of clinical specimens, we disclosed that the expression level of SORBS2 was saliently decreased in metastatic tissues and positively correlated with overall survival. We observed that overexpression of SORBS2 brought about decreased metastatic capacity in ccRCC cell lines. Transcriptome-wide analysis revealed that SORBS2 notably increased microtubule-associated tumor-suppressor 1 gene (MTUS1) expression. In-depth mechanistic exploring discovered that the Cys2-His2 zinc finger (C2H2-ZnF) domain of SORBS2 directly bound to the 3′ untranslated region (3′UTR) of MTUS1 mRNA, which increased MTUS1 mRNA stability. In addition, we identified that MTUS1 regulated microtubule dynamics via promoting KIF2CS192 phosphorylation by Aurora B. Together, our research identified SORBS2 as a suppressor of ccRCC metastasis by enhancing MTUS1 mRNA stability, providing a novel understanding of RBPs during ccRCC progression.
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19
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Klocko AD, Summers CA, Glover ML, Parrish R, Storck WK, McNaught KJ, Moss ND, Gotting K, Stewart A, Morrison AM, Payne L, Hatakeyama S, Selker EU. Selection and Characterization of Mutants Defective in DNA Methylation in Neurospora crassa. Genetics 2020; 216:671-688. [PMID: 32873602 PMCID: PMC7648584 DOI: 10.1534/genetics.120.303471] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 08/25/2020] [Indexed: 01/05/2023] Open
Abstract
DNA methylation, a prototypical epigenetic modification implicated in gene silencing, occurs in many eukaryotes and plays a significant role in the etiology of diseases such as cancer. The filamentous fungus Neurospora crassa places DNA methylation at regions of constitutive heterochromatin such as in centromeres and in other A:T-rich regions of the genome, but this modification is dispensable for normal growth and development. This and other features render N. crassa an excellent model to genetically dissect elements of the DNA methylation pathway. We implemented a forward genetic selection on a massive scale, utilizing two engineered antibiotic-resistance genes silenced by DNA methylation, to isolate mutants d efective i n m ethylation (dim). Hundreds of potential mutants were characterized, yielding a rich collection of informative alleles of 11 genes important for DNA methylation, most of which were already reported. In parallel, we characterized the pairwise interactions in nuclei of the DCDC, the only histone H3 lysine 9 methyltransferase complex in Neurospora, including those between the DIM-5 catalytic subunit and other complex members. We also dissected the N- and C-termini of the key protein DIM-7, required for DIM-5 histone methyltransferase localization and activation. Lastly, we identified two alleles of a novel gene, dim-10 - a homolog of Clr5 in Schizosaccharomyces pombe - that is not essential for DNA methylation, but is necessary for repression of the antibiotic-resistance genes used in the selection, which suggests that both DIM-10 and DNA methylation promote silencing of constitutive heterochromatin.
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Affiliation(s)
- Andrew D Klocko
- Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403
| | - Calvin A Summers
- Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403
| | - Marissa L Glover
- Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403
| | - Robert Parrish
- Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403
| | - William K Storck
- Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403
| | - Kevin J McNaught
- Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403
| | - Nicole D Moss
- Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403
| | - Kirsten Gotting
- Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403
| | - Aurelian Stewart
- Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403
| | - Ariel M Morrison
- Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403
| | - Laurel Payne
- Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403
| | - Shin Hatakeyama
- Laboratory of Genetics, Faculty of Science, Shimo-ohkubo 255, Saitama University, Sakura-ward, 338-8570, JAPAN
| | - Eric U Selker
- Institute of Molecular Biology, University of Oregon, Eugene, Oregon 97403
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20
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Balogh A, Reiniger L, Hetey S, Kiraly P, Toth E, Karaszi K, Juhasz K, Gelencser Z, Zvara A, Szilagyi A, Puskas LG, Matko J, Papp Z, Kovalszky I, Juhasz C, Than NG. Decreased Expression of ZNF554 in Gliomas is Associated with the Activation of Tumor Pathways and Shorter Patient Survival. Int J Mol Sci 2020; 21:E5762. [PMID: 32796700 PMCID: PMC7461028 DOI: 10.3390/ijms21165762] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/31/2020] [Accepted: 08/05/2020] [Indexed: 01/01/2023] Open
Abstract
Zinc finger protein 554 (ZNF554), a member of the Krüppel-associated box domain zinc finger protein subfamily, is predominantly expressed in the brain and placenta in humans. Recently, we unveiled that ZNF554 regulates trophoblast invasion during placentation and its decreased expression leads to the early pathogenesis of preeclampsia. Since ZNF proteins are immensely implicated in the development of several tumors including malignant tumors of the brain, here we explored the pathological role of ZNF554 in gliomas. We examined the expression of ZNF554 at mRNA and protein levels in normal brain and gliomas, and then we searched for genome-wide transcriptomic changes in U87 glioblastoma cells transiently overexpressing ZNF554. Immunohistochemistry of brain tissues in our cohort (n = 62) and analysis of large TCGA RNA-Seq data (n = 687) of control, oligodendroglioma, and astrocytoma tissues both revealed decreased expression of ZNF554 towards higher glioma grades. Furthermore, low ZNF554 expression was associated with shorter survival of grade III and IV astrocytoma patients. Overexpression of ZNF554 in U87 cells resulted in differential expression, mostly downregulation of 899 genes. The "PI3K-Akt signaling pathway", known to be activated during glioma development, was the most impacted among 116 dysregulated pathways. Most affected pathways were cancer-related and/or immune-related. Congruently, cell proliferation was decreased and cell cycle was arrested in ZNF554-transfected glioma cells. These data collectively suggest that ZNF554 is a potential tumor suppressor and its decreased expression may lead to the loss of oncogene suppression, activation of tumor pathways, and shorter survival of patients with malignant glioma.
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Affiliation(s)
- Andrea Balogh
- Systems Biology of Reproduction Research Group, Institute of Enzymology, Research Centre for Natural Sciences, H-1117 Budapest, Hungary; (A.B.); (S.H.); (P.K.); (E.T.); (K.K.); (K.J.); (Z.G.); (A.S.)
| | - Lilla Reiniger
- First Department of Pathology and Experimental Cancer Research, Semmelweis University, H-1085 Budapest, Hungary; (L.R.); (I.K.)
| | - Szabolcs Hetey
- Systems Biology of Reproduction Research Group, Institute of Enzymology, Research Centre for Natural Sciences, H-1117 Budapest, Hungary; (A.B.); (S.H.); (P.K.); (E.T.); (K.K.); (K.J.); (Z.G.); (A.S.)
| | - Peter Kiraly
- Systems Biology of Reproduction Research Group, Institute of Enzymology, Research Centre for Natural Sciences, H-1117 Budapest, Hungary; (A.B.); (S.H.); (P.K.); (E.T.); (K.K.); (K.J.); (Z.G.); (A.S.)
| | - Eszter Toth
- Systems Biology of Reproduction Research Group, Institute of Enzymology, Research Centre for Natural Sciences, H-1117 Budapest, Hungary; (A.B.); (S.H.); (P.K.); (E.T.); (K.K.); (K.J.); (Z.G.); (A.S.)
| | - Katalin Karaszi
- Systems Biology of Reproduction Research Group, Institute of Enzymology, Research Centre for Natural Sciences, H-1117 Budapest, Hungary; (A.B.); (S.H.); (P.K.); (E.T.); (K.K.); (K.J.); (Z.G.); (A.S.)
- First Department of Pathology and Experimental Cancer Research, Semmelweis University, H-1085 Budapest, Hungary; (L.R.); (I.K.)
| | - Kata Juhasz
- Systems Biology of Reproduction Research Group, Institute of Enzymology, Research Centre for Natural Sciences, H-1117 Budapest, Hungary; (A.B.); (S.H.); (P.K.); (E.T.); (K.K.); (K.J.); (Z.G.); (A.S.)
| | - Zsolt Gelencser
- Systems Biology of Reproduction Research Group, Institute of Enzymology, Research Centre for Natural Sciences, H-1117 Budapest, Hungary; (A.B.); (S.H.); (P.K.); (E.T.); (K.K.); (K.J.); (Z.G.); (A.S.)
| | - Agnes Zvara
- Laboratory of Functional Genomics, Department of Genetics, Biological Research Centre, H-6726 Szeged, Hungary; (A.Z.); (L.G.P.)
| | - Andras Szilagyi
- Systems Biology of Reproduction Research Group, Institute of Enzymology, Research Centre for Natural Sciences, H-1117 Budapest, Hungary; (A.B.); (S.H.); (P.K.); (E.T.); (K.K.); (K.J.); (Z.G.); (A.S.)
| | - Laszlo G. Puskas
- Laboratory of Functional Genomics, Department of Genetics, Biological Research Centre, H-6726 Szeged, Hungary; (A.Z.); (L.G.P.)
| | - Janos Matko
- Department of Immunology, Eotvos Lorand University, H-1117 Budapest, Hungary;
| | - Zoltan Papp
- Maternity Private Clinic, H-1126 Budapest, Hungary;
- Department of Obstetrics and Gynecology, Semmelweis University, H-1088 Budapest, Hungary
| | - Ilona Kovalszky
- First Department of Pathology and Experimental Cancer Research, Semmelweis University, H-1085 Budapest, Hungary; (L.R.); (I.K.)
| | - Csaba Juhasz
- Department of Pediatrics, Neurology, Neurosurgery, Wayne State University School of Medicine, Detroit, MI 48201, USA;
- Barbara Ann Karmanos Cancer Institute, Detroit, MI 48201, USA
| | - Nandor Gabor Than
- Systems Biology of Reproduction Research Group, Institute of Enzymology, Research Centre for Natural Sciences, H-1117 Budapest, Hungary; (A.B.); (S.H.); (P.K.); (E.T.); (K.K.); (K.J.); (Z.G.); (A.S.)
- First Department of Pathology and Experimental Cancer Research, Semmelweis University, H-1085 Budapest, Hungary; (L.R.); (I.K.)
- Maternity Private Clinic, H-1126 Budapest, Hungary;
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21
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Mao Y, Li Y, Gao H, Lin X. Krüppel homologue 1 interacts directly with Hairy and regulates ecdysis in the brown planthopper. INSECT MOLECULAR BIOLOGY 2020; 29:293-300. [PMID: 31908059 DOI: 10.1111/imb.12635] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 11/27/2019] [Accepted: 12/27/2019] [Indexed: 06/10/2023]
Abstract
Juvenile hormone (JH) plays important roles in the growth and development of insects. JH and its receptor methoprene-tolerant (Met) regulate the expression of transcription factors to control the transcription of downstream genes. The expression of Hairy (Hry) and Krüppel homologue 1 (Kr-h1) is regulated by JH and JH receptors. Hry and Kr-h1 are both crucial in mediating JH signalling. However, whether they interact at the gene level in regulating metamorphosis and whether they interact physically at the protein level remain unknown. We used co-immunoprecipitation, glutathione S-transferase pull-down and RNA interference (RNAi) approaches to study the genetic and biochemical interactions of the two proteins Hry and Kr-h1. The results showed that brown planthopper (Nilaparvata lugens) Hry and Kr-h1 interact directly: Hry binds to the N-terminal of Kr-h1, which includes five zinc-finger domains. The RNAi experiment showed that downregulation of Hry reduced the ratio of ecdysis failure caused by knockdown of Kr-h1, indicating that the downregulation of Hry might mitigate ecdysis failure via the downregulation of Kr-h1. The expression of Hry increased significantly when Kr-h1 was downregulated, whereas it did not change significantly when both were downregulated. Our results suggest that the binding of Hry protein with Kr-h1 prevents the N-terminal five zinc-finger domains from binding with DNA, which in turn inactivates the transcription activator or inhibitor function of Kr-h1. Hry could possibly be used as a target for pesticide applications in the future.
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Affiliation(s)
- Y Mao
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, China
| | - Y Li
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, China
| | - H Gao
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, China
| | - X Lin
- Key Laboratory of Marine Food Quality and Hazard Controlling Technology of Zhejiang Province, College of Life Sciences, China Jiliang University, Hangzhou, China
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22
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Han G, Lu C, Guo J, Qiao Z, Sui N, Qiu N, Wang B. C2H2 Zinc Finger Proteins: Master Regulators of Abiotic Stress Responses in Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:115. [PMID: 32153617 PMCID: PMC7044346 DOI: 10.3389/fpls.2020.00115] [Citation(s) in RCA: 158] [Impact Index Per Article: 39.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Accepted: 01/24/2020] [Indexed: 05/04/2023]
Abstract
Abiotic stresses such as drought and salinity are major environmental factors that limit crop yields. Unraveling the molecular mechanisms underlying abiotic stress resistance is crucial for improving crop performance and increasing productivity under adverse environmental conditions. Zinc finger proteins, comprising one of the largest transcription factor families, are known for their finger-like structure and their ability to bind Zn2+. Zinc finger proteins are categorized into nine subfamilies based on their conserved Cys and His motifs, including the Cys2/His2-type (C2H2), C3H, C3HC4, C2HC5, C4HC3, C2HC, C4, C6, and C8 subfamilies. Over the past two decades, much progress has been made in understanding the roles of C2H2 zinc finger proteins in plant growth, development, and stress signal transduction. In this review, we focus on recent progress in elucidating the structures, functions, and classifications of plant C2H2 zinc finger proteins and their roles in abiotic stress responses.
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Affiliation(s)
- Guoliang Han
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Chaoxia Lu
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Jianrong Guo
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Ziqi Qiao
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Na Sui
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
| | - Nianwei Qiu
- College of Life Sciences, Qufu Normal University, Qufu, China
| | - Baoshan Wang
- Shandong Provincial Key Laboratory of Plant Stress, College of Life Sciences, Shandong Normal University, Jinan, China
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N-terminal domain of the architectural protein CTCF has similar structural organization and ability to self-association in bilaterian organisms. Sci Rep 2020; 10:2677. [PMID: 32060375 PMCID: PMC7021899 DOI: 10.1038/s41598-020-59459-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 01/24/2020] [Indexed: 12/12/2022] Open
Abstract
CTCF is the main architectural protein found in most of the examined bilaterian organisms. The cluster of the C2H2 zinc-finger domains involved in recognition of long DNA-binding motif is only part of the protein that is evolutionarily conserved, while the N-terminal domain (NTD) has different sequences. Here, we performed biophysical characterization of CTCF NTDs from various species representing all major phylogenetic clades of higher metazoans. With the exception of Drosophilides, the N-terminal domains of CTCFs show an unstructured organization and absence of folded regions in vitro. In contrast, NTDs of Drosophila melanogaster and virilis CTCFs contain unstructured folded regions that form tetramers and dimers correspondingly in vitro. Unexpectedly, most NTDs are able to self-associate in the yeast two-hybrid and co-immunoprecipitation assays. These results suggest that NTDs of CTCFs might contribute to the organization of CTCF-mediated long-distance interactions and chromosomal architecture.
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24
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ZNF382: A transcription inhibitor down-regulated in multiple tumors due to promoter methylation. Clin Chim Acta 2019; 500:220-225. [PMID: 31678273 DOI: 10.1016/j.cca.2019.10.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 10/20/2019] [Accepted: 10/21/2019] [Indexed: 12/20/2022]
Abstract
Zinc finger protein 382 (ZNF382), a member of the Krüppel-associated box zinc finger proteins (KRAB-ZFPs) family, plays critical roles in regulating certain downstream genes expression as a transcription inhibitor. ZNF382 is downregulated in multiple tumors due to hypermethylation of its promoter, to be more specific, methylation of promoter CpG island may contributes to inhibition of gene expression as found in many studies. With application of DNA methyltransferase inhibitors (DNMTi) 5-azacytidine and 5-aza-2'-deoxycytidine, hypomethylation of ZNF382 gene may contribute to anti-tumor effects. This review summerized the structure, biological functions, expression and the roles of ZNF382 in multiple cancers, and, expression of ZNF382 regulated by promoter methylation was further discussed to show the possibilities of DNA hypomethylation treatment as a potential treatment in clinical applications.
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25
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Kolvenbach CM, Dworschak GC, Frese S, Japp AS, Schuster P, Wenzlitschke N, Yilmaz Ö, Lopes FM, Pryalukhin A, Schierbaum L, van der Zanden LFM, Kause F, Schneider R, Taranta-Janusz K, Szczepańska M, Pawlaczyk K, Newman WG, Beaman GM, Stuart HM, Cervellione RM, Feitz WFJ, van Rooij IALM, Schreuder MF, Steffens M, Weber S, Merz WM, Feldkötter M, Hoppe B, Thiele H, Altmüller J, Berg C, Kristiansen G, Ludwig M, Reutter H, Woolf AS, Hildebrandt F, Grote P, Zaniew M, Odermatt B, Hilger AC. Rare Variants in BNC2 Are Implicated in Autosomal-Dominant Congenital Lower Urinary-Tract Obstruction. Am J Hum Genet 2019; 104:994-1006. [PMID: 31051115 PMCID: PMC6506863 DOI: 10.1016/j.ajhg.2019.03.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Accepted: 03/22/2019] [Indexed: 12/29/2022] Open
Abstract
Congenital lower urinary-tract obstruction (LUTO) is caused by anatomical blockage of the bladder outflow tract or by functional impairment of urinary voiding. About three out of 10,000 pregnancies are affected. Although several monogenic causes of functional obstruction have been defined, it is unknown whether congenital LUTO caused by anatomical blockage has a monogenic cause. Exome sequencing in a family with four affected individuals with anatomical blockage of the urethra identified a rare nonsense variant (c.2557C>T [p.Arg853∗]) in BNC2, encoding basonuclin 2, tracking with LUTO over three generations. Re-sequencing BNC2 in 697 individuals with LUTO revealed three further independent missense variants in three unrelated families. In human and mouse embryogenesis, basonuclin 2 was detected in lower urinary-tract rudiments. In zebrafish embryos, bnc2 was expressed in the pronephric duct and cloaca, analogs of the mammalian lower urinary tract. Experimental knockdown of Bnc2 in zebrafish caused pronephric-outlet obstruction and cloacal dilatation, phenocopying human congenital LUTO. Collectively, these results support the conclusion that variants in BNC2 are strongly implicated in LUTO etiology as a result of anatomical blockage.
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Affiliation(s)
- Caroline M Kolvenbach
- Department of Pediatrics, Children's Hospital, University Hospital Bonn, 53113 Bonn, Germany; Institute of Anatomy, University of Bonn, 53115 Bonn, Germany; Division of Nephrology, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Gabriel C Dworschak
- Department of Pediatrics, Children's Hospital, University Hospital Bonn, 53113 Bonn, Germany; Institute of Anatomy, University of Bonn, 53115 Bonn, Germany; Institute of Human Genetics, University of Bonn, 53127 Bonn, Germany
| | - Sandra Frese
- Department of Pediatrics, Children's Hospital, University Hospital Bonn, 53113 Bonn, Germany; Institute of Human Genetics, University of Bonn, 53127 Bonn, Germany
| | - Anna S Japp
- Institute of Neuropathology, University of Bonn Medical Center, 53127 Bonn, Germany
| | - Peggy Schuster
- Institute of Cardiovascular Regeneration, Center for Molecular Medicine, Goethe University, 60439 Frankfurt am Main, Germany
| | - Nina Wenzlitschke
- Institute of Cardiovascular Regeneration, Center for Molecular Medicine, Goethe University, 60439 Frankfurt am Main, Germany
| | - Öznur Yilmaz
- Institute of Anatomy, University of Bonn, 53115 Bonn, Germany
| | - Filipa M Lopes
- Division of Cell Matrix and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester Academic Health Science Centere, Manchester M13 9PT, United Kingdom
| | - Alexey Pryalukhin
- Institute of Pathology, University Hospital Bonn, 53127 Bonn, Germany
| | - Luca Schierbaum
- Department of Pediatrics, Children's Hospital, University Hospital Bonn, 53113 Bonn, Germany; Institute of Human Genetics, University of Bonn, 53127 Bonn, Germany
| | - Loes F M van der Zanden
- Radboud Institute for Health Sciences, Department for Health Evidence, Radboud University Medical Center, 6525 GA Nijmegen, the Netherlands
| | - Franziska Kause
- Department of Pediatrics, Children's Hospital, University Hospital Bonn, 53113 Bonn, Germany; Division of Nephrology, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Ronen Schneider
- Division of Nephrology, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Katarzyna Taranta-Janusz
- Department of Pediatrics and Nephrology, Medical University of Białystok, 15-089 Białystok, Poland
| | - Maria Szczepańska
- Department and Clinics of Pediatrics, School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia in Katowice, 40-055 Zabrze, Poland
| | - Krzysztof Pawlaczyk
- Department of Nephrology, Transplantology, and Internal Medicine, Poznan University of Medical Sciences, 61-701 Poznan, Poland
| | - William G Newman
- Division of Evolution and Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PT, United Kingdom
| | - Glenda M Beaman
- Division of Evolution and Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PT, United Kingdom
| | - Helen M Stuart
- Division of Evolution and Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PT, United Kingdom
| | - Raimondo M Cervellione
- Paediatric Urology, Royal Manchester Children's Hospital, Central Manchester University Hospitals NHS Foundation Trust, Manchester M13 9WL, United Kingdom
| | - Wouter F J Feitz
- Department of Urology, Pediatric Urology, Radboudumc Amalia Children's Hospital, 6525 GA Nijmegen, the Netherlands
| | - Iris A L M van Rooij
- Radboud Institute for Health Sciences, Department for Health Evidence, Radboud University Medical Center, 6525 GA Nijmegen, the Netherlands; Department of Surgery-Pediatric Surgery, Radboudumc Amalia Children's Hospital, 6525 GA Nijmegen, the Netherlands
| | - Michiel F Schreuder
- Department of Pediatric Nephrology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Amalia Children's Hospital, 6525 GA Nijmegen, the Netherlands
| | | | - Stefanie Weber
- Department of Pediatrics, University Hospital Marburg, 35037 Marburg, Germany
| | - Waltraut M Merz
- Department of Obstetrics and Prenatal Medicine, University of Bonn, 53127 Bonn, Germany
| | - Markus Feldkötter
- Division of Pediatric Nephrology, Department of Pediatrics, University Hospital Bonn, 53129 Bonn, Germany
| | - Bernd Hoppe
- Division of Pediatric Nephrology, Department of Pediatrics, University Hospital Bonn, 53129 Bonn, Germany
| | - Holger Thiele
- Cologne Center for Genomics, University of Cologne, 50391 Cologne, Germany
| | - Janine Altmüller
- Cologne Center for Genomics, University of Cologne, 50391 Cologne, Germany; Center for Molecular Medicine Cologne, University of Cologne, 50391 Cologne, Germany
| | - Christoph Berg
- Department of Obstetrics and Prenatal Medicine, University of Bonn, 53127 Bonn, Germany
| | - Glen Kristiansen
- Division of Evolution and Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PT, United Kingdom
| | - Michael Ludwig
- Department of Clinical Chemistry and Clinical Pharmacology, University of Bonn, 53127 Bonn, Germany
| | - Heiko Reutter
- Institute of Human Genetics, University of Bonn, 53127 Bonn, Germany; Department of Neonatology and Pediatric Intensive Care, Children's Hospital, University of Bonn, 53127 Bonn, Germany
| | - Adrian S Woolf
- Division of Cell Matrix and Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine, and Health, University of Manchester, Manchester Academic Health Science Centere, Manchester M13 9PT, United Kingdom
| | - Friedhelm Hildebrandt
- Division of Nephrology, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, United States
| | - Phillip Grote
- Institute of Cardiovascular Regeneration, Center for Molecular Medicine, Goethe University, 60439 Frankfurt am Main, Germany
| | - Marcin Zaniew
- Department of Pediatrics, University of Zielona Góra, 56-417 Zielona Góra, Poland
| | - Benjamin Odermatt
- Institute of Anatomy, University of Bonn, 53115 Bonn, Germany; Institute of Neuro-Anatomy, University of Bonn, 53115 Bonn, Germany.
| | - Alina C Hilger
- Department of Pediatrics, Children's Hospital, University Hospital Bonn, 53113 Bonn, Germany; Institute of Human Genetics, University of Bonn, 53127 Bonn, Germany.
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Ghersi JJ, Mahony CB, Bertrand JY. bif1, a new BMP signaling inhibitor, regulates embryonic hematopoiesis in the zebrafish. Development 2019; 146:dev.164103. [PMID: 30837221 DOI: 10.1242/dev.164103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 02/22/2019] [Indexed: 01/17/2023]
Abstract
Hematopoiesis maintains the entire blood system, and dysregulation of this process can lead to malignancies (leukemia), immunodeficiencies or red blood cell diseases (anemia, polycythemia vera). We took advantage of the zebrafish model that shares most of the genetic program involved in hematopoiesis with mammals to characterize a new gene of unknown function, si:ch73-299h12.2, which is expressed in the erythroid lineage during primitive, definitive and adult hematopoiesis. This gene, required during primitive and definitive erythropoiesis, encodes a C2H2 zinc-finger protein that inhibits BMP signaling. We therefore named this gene blood-inducing factor 1 and BMP inhibitory factor 1 (bif1). We identified a bif1 ortholog in Sinocyclocheilus rhinocerous, another fish, and in the mouse genome. Both genes also inhibit BMP signaling when overexpressed in zebrafish. In conclusion, we have deorphanized a new zebrafish gene of unknown function: bif1 codes for a zinc-finger protein that inhibits BMP signaling and also regulates primitive erythropoiesis and definitive hematopoiesis.
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Affiliation(s)
- Joey J Ghersi
- University of Geneva, School of Medicine, Department of Pathology and Immunology, CMU, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - Christopher B Mahony
- University of Geneva, School of Medicine, Department of Pathology and Immunology, CMU, University of Geneva, CH-1211 Geneva 4, Switzerland
| | - Julien Y Bertrand
- University of Geneva, School of Medicine, Department of Pathology and Immunology, CMU, University of Geneva, CH-1211 Geneva 4, Switzerland
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27
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Yun Y, Zhou X, Yang S, Wen Y, You H, Zheng Y, Norvienyeku J, Shim WB, Wang Z. Fusarium oxysporum f. sp. lycopersici C 2H 2 transcription factor FolCzf1 is required for conidiation, fusaric acid production, and early host infection. Curr Genet 2019; 65:773-783. [PMID: 30631890 DOI: 10.1007/s00294-019-00931-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2018] [Revised: 12/21/2018] [Accepted: 01/03/2019] [Indexed: 11/26/2022]
Abstract
The soil-borne, asexual fungus Fusarium oxysporum f.sp. lycopersici (Fol) is a causal agent of tomato wilt disease. The infection process of Fol comprises root recognition, adhesion, penetration, colonization of the root cortex and hyphal proliferation within the xylem vessels, which are under the regulation of virulence-involved transcription factors (TFs). In this study, we identified a gene, designated FolCZF1, which encodes a C2H2 TF in Fol. The homologs of FolCzf1 are also known to affect pathogenicity in F. graminearum and Magnaporthe oryzae on wheat and rice, respectively. We learned that FolCZF1 transcript level is upregulated in conidia and early host infection stage, which led us to hypothesize that FolCzf1 is associated with early host infection in Fol. The FolCZF1 deletion mutant (ΔFolCZF1) exhibited defects in growth rate, conidiation, conidia morphology and a complete loss of virulence on tomato root. Further microscopic observation showed that ΔFolCZF1 can penetrate the root but the primary infection hypha cannot extend its colonization inside the host tissue, suggesting that FolCzf1 TF plays an important role in early infection. Fusaric acid, a secondary metabolite produced by Fusarium species, is suggested as a virulence factor in many crop diseases. We found that FolCzf1 plays a critical role in fusaric acid production by regulating the expression of fusaric acid biosynthesis genes. In summary, FolCzf1 is required for conidiation, secondary metabolism, and early host infection in Fol, and we propose that homologs of FolCzf1 are required for early parasitic growth in other plant pathogenic filamentous fungi.
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Affiliation(s)
- Yingzi Yun
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, China.
| | - Xin Zhou
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Shuai Yang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Ya Wen
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Haixia You
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yuru Zheng
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Institute for Food and Drug Quality Control, Fuzhou, China
| | - Justice Norvienyeku
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Won-Bo Shim
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, China.
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX, USA.
| | - Zonghua Wang
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou, China.
- Institute of Oceanography, Minjiang University, Fuzhou, China.
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28
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Li KL, Yuan SY, Nanda S, Wang WX, Lai FX, Fu Q, Wan PJ. The Roles of E93 and Kr-h1 in Metamorphosis of Nilaparvata lugens. Front Physiol 2018; 9:1677. [PMID: 30524315 PMCID: PMC6262030 DOI: 10.3389/fphys.2018.01677] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 11/08/2018] [Indexed: 11/21/2022] Open
Abstract
Metamorphosis is a crucial process in insect development. Ecdysone-induced protein 93 (E93) is a determinant that promotes adult metamorphosis in both hemimetabolous and holometabolous insects. Krüppel-homolog 1 (Kr-h1), an early juvenile hormone (JH)-inducible gene, participates in JH signaling pathway controlling insect metamorphosis. In the current study, an E93 cDNA (NlE93) and two Kr-h1 cDNA variants (NlKr-h1-a and NlKr-h1-b) were cloned from Nilaparvata lugens (Stål), one of the most destructive hemimetabolous insect pests on rice. Multiple sequence alignment showed that both NlE93 and NlKr-h1 share high identity with their orthologs from other insects. The expression patterns revealed that decreasing NlKr-h1 mRNA levels were correlated with increasing NlE93 mRNA levels and vice versa. Moreover, RNA interference (RNAi) assays showed that the knockdown of one of the two genes resulted in significantly upregulated expression of the other. Correspondingly, phenotypical observation of the RNAi insects revealed that depletion of NlE93 prevented nymph–adult transition (causing a supernumerary nymphal instar), while depletion of NlKr-h1 triggered precocious formation of incomplete adult features. The results suggest that Nlkr-h1 and NlE93 are mutual repressors, fitting into the MEKRE93 pathway. The balance between these two genes plays a critical role in the metamorphosis of N. lugens determining the proper timing for activating metamorphosis during the nymphal stage.
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Affiliation(s)
- Kai Long Li
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, China.,Hunan Institute of Food Quality Supervision Inspection and Research, Changsha, China
| | - San Yue Yuan
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Satyabrata Nanda
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Wei Xia Wang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Feng Xiang Lai
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Qiang Fu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Pin Jun Wan
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, China
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29
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Malik AM, Miguez RA, Li X, Ho YS, Feldman EL, Barmada SJ. Matrin 3-dependent neurotoxicity is modified by nucleic acid binding and nucleocytoplasmic localization. eLife 2018; 7:e35977. [PMID: 30015619 PMCID: PMC6050042 DOI: 10.7554/elife.35977] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 07/01/2018] [Indexed: 12/12/2022] Open
Abstract
Abnormalities in nucleic acid processing are associated with the development of amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). Mutations in Matrin 3 (MATR3), a poorly understood DNA- and RNA-binding protein, cause familial ALS/FTD, and MATR3 pathology is a feature of sporadic disease, suggesting that MATR3 dysfunction is integrally linked to ALS pathogenesis. Using a rat primary neuron model to assess MATR3-mediated toxicity, we noted that neurons were bidirectionally vulnerable to MATR3 levels, with pathogenic MATR3 mutants displaying enhanced toxicity. MATR3's zinc finger domains partially modulated toxicity, but elimination of its RNA recognition motifs had no effect on survival, instead facilitating its self-assembly into liquid-like droplets. In contrast to other RNA-binding proteins associated with ALS, cytoplasmic MATR3 redistribution mitigated neurodegeneration, suggesting that nuclear MATR3 mediates toxicity. Our findings offer a foundation for understanding MATR3-related neurodegeneration and how nucleic acid binding functions, localization, and pathogenic mutations drive sporadic and familial disease.
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Affiliation(s)
- Ahmed M Malik
- Medical Scientist Training ProgramUniversity of MichiganAnn ArborUnited States
- Neuroscience Graduate ProgramUniversity of MichiganAnn ArborUnited States
| | - Roberto A Miguez
- Department of NeurologyUniversity of MichiganAnn ArborUnited States
| | - Xingli Li
- Department of NeurologyUniversity of MichiganAnn ArborUnited States
| | - Ye-Shih Ho
- Institute of Environmental Health SciencesWayne State UniversityDetroitUnited States
| | - Eva L Feldman
- Neuroscience Graduate ProgramUniversity of MichiganAnn ArborUnited States
- Department of NeurologyUniversity of MichiganAnn ArborUnited States
- Program for Neurology Research and DiscoveryUniversity of MichiganAnn ArborUnited States
| | - Sami J Barmada
- Neuroscience Graduate ProgramUniversity of MichiganAnn ArborUnited States
- Department of NeurologyUniversity of MichiganAnn ArborUnited States
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30
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Arnold CD, Nemčko F, Woodfin AR, Wienerroither S, Vlasova A, Schleiffer A, Pagani M, Rath M, Stark A. A high-throughput method to identify trans-activation domains within transcription factor sequences. EMBO J 2018; 37:embj.201798896. [PMID: 30006452 PMCID: PMC6092621 DOI: 10.15252/embj.201798896] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 06/15/2018] [Accepted: 06/15/2018] [Indexed: 11/09/2022] Open
Abstract
Even though transcription factors (TFs) are central players of gene regulation and have been extensively studied, their regulatory trans-activation domains (tADs) often remain unknown and a systematic functional characterization of tADs is lacking. Here, we present a novel high-throughput approach tAD-seq to functionally test thousands of candidate tADs from different TFs in parallel. The tADs we identify by pooled screening validate in individual luciferase assays, whereas neutral regions do not. Interestingly, the tADs are found at arbitrary positions within the TF sequences and can contain amino acid (e.g., glutamine) repeat regions or overlap structured domains, including helix-loop-helix domains that are typically annotated as DNA-binding. We also identified tADs in the non-native reading frames, confirming that random sequences can function as tADs, albeit weakly. The identification of tADs as short protein sequences sufficient for transcription activation will enable the systematic study of TF function, which-particularly for TFs of different transcription activating functionalities-is still poorly understood.
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Affiliation(s)
- Cosmas D Arnold
- Research Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Vienna, Austria
| | - Filip Nemčko
- Research Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Vienna, Austria
| | - Ashley R Woodfin
- Research Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Vienna, Austria
| | | | - Anna Vlasova
- Research Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Vienna, Austria
| | - Alexander Schleiffer
- Research Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Vienna, Austria.,Institute of Molecular Biotechnology (IMBA), Vienna BioCenter (VBC), Vienna, Austria
| | - Michaela Pagani
- Research Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Vienna, Austria
| | - Martina Rath
- Research Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Vienna, Austria
| | - Alexander Stark
- Research Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Vienna, Austria .,Medical University of Vienna, Vienna BioCenter (VBC), Vienna, Austria
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31
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Role of Zic Family Proteins in Transcriptional Regulation and Chromatin Remodeling. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1046:353-380. [DOI: 10.1007/978-981-10-7311-3_18] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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32
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Lin CY, Lin LY. The conserved basic residues and the charged amino acid residues at the α-helix of the zinc finger motif regulate the nuclear transport activity of triple C2H2 zinc finger proteins. PLoS One 2018; 13:e0191971. [PMID: 29381770 PMCID: PMC5790263 DOI: 10.1371/journal.pone.0191971] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 01/15/2018] [Indexed: 11/19/2022] Open
Abstract
Zinc finger (ZF) motifs on proteins are frequently recognized as a structure for DNA binding. Accumulated reports indicate that ZF motifs contain nuclear localization signal (NLS) to facilitate the transport of ZF proteins into nucleus. We investigated the critical factors that facilitate the nuclear transport of triple C2H2 ZF proteins. Three conserved basic residues (hot spots) were identified among the ZF sequences of triple C2H2 ZF proteins that reportedly have NLS function. Additional basic residues can be found on the α-helix of the ZFs. Using the ZF domain (ZFD) of Egr-1 as a template, various mutants were constructed and expressed in cells. The nuclear transport activity of various mutants was estimated by analyzing the proportion of protein localized in the nucleus. Mutation at any hot spot of the Egr-1 ZFs reduced the nuclear transport activity. Changes of the basic residues at the α-helical region of the second ZF (ZF2) of the Egr-1 ZFD abolished the NLS activity. However, this activity can be restored by substituting the acidic residues at the homologous positions of ZF1 or ZF3 with basic residues. The restored activity dropped again when the hot spots at ZF1 or the basic residues in the α-helix of ZF3 were mutated. The variations in nuclear transport activity are linked directly to the binding activity of the ZF proteins with importins. This study was extended to other triple C2H2 ZF proteins. SP1 and KLF families, similar to Egr-1, have charged amino acid residues at the second (α2) and the third (α3) positions of the α-helix. Replacing the amino acids at α2 and α3 with acidic residues reduced the NLS activity of the SP1 and KLF6 ZFD. The reduced activity can be restored by substituting the α3 with histidine at any SP1 and KLF6 ZFD. The results show again the interchangeable role of ZFs and charge residues in the α-helix in regulating the NLS activity of triple C2H2 ZF proteins.
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Affiliation(s)
- Chih-Ying Lin
- Institute of Molecular and Cellular Biology and Department of Life Science, National Tsing Hua University, Hsinchu, Taiwan, ROC
| | - Lih-Yuan Lin
- Institute of Molecular and Cellular Biology and Department of Life Science, National Tsing Hua University, Hsinchu, Taiwan, ROC
- * E-mail:
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33
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Cho JG, Park S, Lim CH, Kim HS, Song SY, Roh TY, Sung JH, Suh W, Ham SJ, Lim KH, Park SG. ZNF224, Krüppel like zinc finger protein, induces cell growth and apoptosis-resistance by down-regulation of p21 and p53 via miR-663a. Oncotarget 2018; 7:31177-90. [PMID: 27105517 PMCID: PMC5058748 DOI: 10.18632/oncotarget.8870] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 03/31/2016] [Indexed: 11/25/2022] Open
Abstract
ZNF224 is a Krüppel-associated box-containing zinc-finger protein which represses gene transcription by interacting with various co-repressors. However, its consensus DNA sequences and target genes are not fully identified. In this study, we identified and characterized consensus DNA sequences containing 5′-CAGC-3′; recognized by ZNF224 through ChIP-sequencing, which further confirmed by ELISA, SPR, qPCR, and luciferase activity assay. ZNF224 increased miR-663a transcription by binding to miR-663a promoter, which in turn binds to 3′; UTR of p53 and p21 to decrease their expression. miR-663a antagonist abolished ZNF224-mediated suppression of p21 and p53, resulting in the enhanced apoptosis by CPT. The analyses using human breast ductal carcinoma tissues exhibited that the expression of ZNF224 and miR-663a was increased in cancer compared to non-cancer region. Consequently, ZNF224 increases cell survival and decreases apoptosis by decreasing the expression of p53 and p21 via miR-663a as a transcriptional activator. Taken together, we identified and characterized DNA binding element of ZNF224, and its target genes, miR-663a, which provides a novel insight in the down-regulation of p21 and p53 via miR-663a by ZNF224 in breast cancer.
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Affiliation(s)
- Jin Gu Cho
- Department of Biomedical Science, CHA University, Sungnam-si, Gyunggi-do, Korea.,Laboratory for Tracing of Gene Function, Department of Pharmacy, College of Pharmacy, Ajou University, Suwon, Gyunggi-do, Korea
| | - Seho Park
- Department of Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Chae Hyun Lim
- Division of Integrative Biosciences & Biotechnology, Pohang University of Science & Technology (POSTECH), Pohang, Gyeongbuk, Korea
| | - Hong Sook Kim
- Laboratory for Tracing of Gene Function, Department of Pharmacy, College of Pharmacy, Ajou University, Suwon, Gyunggi-do, Korea
| | - Seung Yong Song
- Department of Plastic and Reconstructive Surgery, Yonsei University College of Medicine, Seoul, Korea
| | - Tae-Young Roh
- Division of Integrative Biosciences & Biotechnology, Pohang University of Science & Technology (POSTECH), Pohang, Gyeongbuk, Korea
| | - Jong-Hyuk Sung
- Department of Pharmacy, College of Pharmacy, Yonsei University, Incheon, Korea
| | - Wonhee Suh
- Department of Pharmacy, College of Pharmacy, Chung-Ang University, Seoul, Korea
| | - Seok-Jin Ham
- Division of Integrative Biosciences & Biotechnology, Pohang University of Science & Technology (POSTECH), Pohang, Gyeongbuk, Korea
| | - Key-Hwan Lim
- Laboratory for Tracing of Gene Function, Department of Pharmacy, College of Pharmacy, Ajou University, Suwon, Gyunggi-do, Korea
| | - Sang Gyu Park
- Laboratory for Tracing of Gene Function, Department of Pharmacy, College of Pharmacy, Ajou University, Suwon, Gyunggi-do, Korea
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34
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Moriya C, Taniguchi H, Nagatoishi S, Igarashi H, Tsumoto K, Imai K. PRDM14 directly interacts with heat shock proteins HSP90α and glucose-regulated protein 78. Cancer Sci 2017; 109:373-383. [PMID: 29178343 PMCID: PMC5797828 DOI: 10.1111/cas.13458] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 11/16/2017] [Accepted: 11/21/2017] [Indexed: 12/22/2022] Open
Abstract
PRDM14 is overexpressed in various cancers and can regulate cancer phenotype under certain conditions. Inhibiting PRDM14 expression in breast and pancreatic cancers has been reported to reduce cancer stem‐like phenotypes, which are associated with aggressive tumor properties. Therefore, PRDM14 is considered a promising target for cancer therapy. To develop a pharmaceutical treatment, the mechanism and interacting partners of PRDM14 need to be clarified. Here, we identified the proteins interacting with PRDM14 in triple‐negative breast cancer (TNBC) cells, which do not express the three most common types of receptor (estrogen receptors, progesterone receptors, and HER2). We obtained 13 candidates that were pulled down with PRDM14 in TNBC HCC1937 cells and identified them by mass spectrometry. Two candidates—glucose‐regulated protein 78 (GRP78) and heat shock protein 90‐α (HSP90α)—were confirmed in immunoprecipitation assay in two TNBC cell lines (HCC1937 and MDA‐MB231). Surface plasmon resonance analysis using GST‐PRDM14 showed that these two proteins directly interacted with PRDM14 and that the interactions required the C‐terminal region of PRDM14, which includes zinc finger motifs. We also confirmed the interactions in living cells by NanoLuc luciferase‐based bioluminescence resonance energy transfer (NanoBRET) assay. Moreover, HSP90 inhibitors (17DMAG and HSP990) significantly decreased breast cancer stem‐like CD24− CD44+ and side population (SP) cells in HCC1937 cells, but not in PRDM14 knockdown HCC1937 cells. The combination of the GRP78 inhibitor HA15 and PRDM14 knockdown significantly decreased cell proliferation and SP cell number in HCC1937 cells. These results suggest that HSP90α and GRP78 interact with PRDM14 and participate in cancer regulation.
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Affiliation(s)
- Chiharu Moriya
- Center for Antibody and Vaccine Therapy, Research Hospital, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Hiroaki Taniguchi
- Center for Antibody and Vaccine Therapy, Research Hospital, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Satoru Nagatoishi
- Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo, Japan.,Project Division of Advanced Biopharmaceutical Science, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Hisayoshi Igarashi
- Center for Antibody and Vaccine Therapy, Research Hospital, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Kouhei Tsumoto
- Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo, Japan.,Drug Discovery Initiative, The University of Tokyo, Tokyo, Japan.,Laboratory of Medical Proteomics, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Kohzoh Imai
- The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
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35
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Fadda A, Syed N, Mackeh R, Papadopoulou A, Suzuki S, Jithesh PV, Kino T. Genome-wide Regulatory Roles of the C2H2-type Zinc Finger Protein ZNF764 on the Glucocorticoid Receptor. Sci Rep 2017; 7:41598. [PMID: 28139699 PMCID: PMC5282477 DOI: 10.1038/srep41598] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 12/23/2016] [Indexed: 01/13/2023] Open
Abstract
The C2H2-type zinc finger protein ZNF764 acts as an enhancer for several steroid hormone receptors, and haploinsufficiency of this gene may be responsible for tissue resistance to multiple steroid hormones including glucocorticoids observed in a patient with 16p11.2 microdeletion. We examined genome-wide regulatory actions of ZNF764 on the glucocorticoid receptor (GR) in HeLa cells as a model system. ZNF764- and GR-binding sites demonstrated similar distribution in various genomic features. They positioned predominantly around 50-500 kbs from the transcription start sites of their nearby genes, and were closely localized with each other, overlapping in ~37% of them. ZNF764 demonstrated differential on/off effects on GR-binding and subsequent mRNA expression: some genes were highly dependent on the presence/absence of ZNF764, but others were not. Pathway analysis revealed that these 3 gene groups were involved in distinct cellular activities. ZNF764 physically interacted with GR at ligand-binding domain through its KRAB domain, and both its physical interaction to GR and zinc finger domain appear to be required for ZNF764 to regulate GR transcriptional activity. Thus, ZNF764 is a cofactor directing GR transcriptional activity toward specific biologic pathways by changing GR binding and transcriptional activity on the glucocorticoid-responsive genes.
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Affiliation(s)
- Abeer Fadda
- Division of Translational Medicine, Sidra Medical and Research Center, Doha 26999, Qatar
| | - Najeeb Syed
- Division of Biomedical Informatics, Sidra Medical and Research Center, Doha 26999, Qatar
| | - Rafah Mackeh
- Division of Translational Medicine, Sidra Medical and Research Center, Doha 26999, Qatar
| | - Anna Papadopoulou
- Program in Reproductive and Adult Endocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
| | - Shigeru Suzuki
- Program in Reproductive and Adult Endocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
- Department of Pediatrics, Asahikawa Medical University, Asahikawa 078-8510, Japan
| | - Puthen V. Jithesh
- Division of Biomedical Informatics, Sidra Medical and Research Center, Doha 26999, Qatar
| | - Tomoshige Kino
- Division of Translational Medicine, Sidra Medical and Research Center, Doha 26999, Qatar
- Program in Reproductive and Adult Endocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
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36
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Bédard M, Roy V, Montagne M, Lavigne P. Structural Insights into c-Myc-interacting Zinc Finger Protein-1 (Miz-1) Delineate Domains Required for DNA Scanning and Sequence-specific Binding. J Biol Chem 2016; 292:3323-3340. [PMID: 28035002 DOI: 10.1074/jbc.m116.748699] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 12/13/2016] [Indexed: 11/06/2022] Open
Abstract
c-Myc-interacting zinc finger protein-1 (Miz-1) is a poly-Cys2His2 zinc finger (ZF) transcriptional regulator of many cell cycle genes. A Miz-1 DNA sequence consensus has recently been identified and has also unveiled Miz-1 functions in other cellular processes, underscoring its importance in the cell. Miz-1 contains 13 ZFs, but it is unknown why Miz-1 has so many ZFs and whether they recognize and bind DNA sequences in a typical fashion. Here, we used NMR to deduce the role of Miz-1 ZFs 1-4 in detecting the Miz-1 consensus sequence and preventing nonspecific DNA binding. In the construct containing the first 4 ZFs, we observed that ZFs 3 and 4 form an unusual compact and stable structure that restricts their motions. Disruption of this compact structure by an electrostatically mismatched A86K mutation profoundly affected the DNA binding properties of the WT construct. On the one hand, Miz1-4WT was found to bind the Miz-1 DNA consensus sequence weakly and through ZFs 1-3 only. On the other hand, the four ZFs in the structurally destabilized Miz1-4A86K mutant bound to the DNA consensus with a 30-fold increase in affinity (100 nm). The formation of such a thermodynamically stable but nonspecific complex is expected to slow down the rate of DNA scanning by Miz-1 during the search for its consensus sequence. Interestingly, we found that the motif stabilizing the compact structure between ZFs 3 and 4 is conserved and enriched in other long poly-ZF proteins. As discussed in detail, our findings support a general role of compact inter-ZF structures in minimizing the formation of off-target DNA complexes.
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Affiliation(s)
- Mikaël Bédard
- Département de Biochimie, Institut de Pharmacologie de Sherbrooke, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke J1H 5N4, Canada; Regroupement Stratégique sur la Fonction, la Structure, et l'Ingénierie des Protéines (PROTEO), Université Laval, Québec G1V 0A6, Canada; Groupe de Recherche Axé sur la Structure des Protéines (GRASP), McGill University, Montréal, Québec H3G 0B1, Canada
| | - Vincent Roy
- Département de Biochimie, Institut de Pharmacologie de Sherbrooke, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke J1H 5N4, Canada; Regroupement Stratégique sur la Fonction, la Structure, et l'Ingénierie des Protéines (PROTEO), Université Laval, Québec G1V 0A6, Canada; Groupe de Recherche Axé sur la Structure des Protéines (GRASP), McGill University, Montréal, Québec H3G 0B1, Canada
| | - Martin Montagne
- Département de Biochimie, Institut de Pharmacologie de Sherbrooke, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke J1H 5N4, Canada; Regroupement Stratégique sur la Fonction, la Structure, et l'Ingénierie des Protéines (PROTEO), Université Laval, Québec G1V 0A6, Canada; Groupe de Recherche Axé sur la Structure des Protéines (GRASP), McGill University, Montréal, Québec H3G 0B1, Canada
| | - Pierre Lavigne
- Département de Biochimie, Institut de Pharmacologie de Sherbrooke, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke J1H 5N4, Canada; Regroupement Stratégique sur la Fonction, la Structure, et l'Ingénierie des Protéines (PROTEO), Université Laval, Québec G1V 0A6, Canada; Groupe de Recherche Axé sur la Structure des Protéines (GRASP), McGill University, Montréal, Québec H3G 0B1, Canada.
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37
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Schmitges FW, Radovani E, Najafabadi HS, Barazandeh M, Campitelli LF, Yin Y, Jolma A, Zhong G, Guo H, Kanagalingam T, Dai WF, Taipale J, Emili A, Greenblatt JF, Hughes TR. Multiparameter functional diversity of human C2H2 zinc finger proteins. Genome Res 2016; 26:1742-1752. [PMID: 27852650 PMCID: PMC5131825 DOI: 10.1101/gr.209643.116] [Citation(s) in RCA: 110] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 10/24/2016] [Indexed: 11/24/2022]
Abstract
C2H2 zinc finger proteins represent the largest and most enigmatic class of human transcription factors. Their C2H2-ZF arrays are highly variable, indicating that most will have unique DNA binding motifs. However, most of the binding motifs have not been directly determined. In addition, little is known about whether or how these proteins regulate transcription. Most of the ∼700 human C2H2-ZF proteins also contain at least one KRAB, SCAN, BTB, or SET domain, suggesting that they may have common interacting partners and/or effector functions. Here, we report a multifaceted functional analysis of 131 human C2H2-ZF proteins, encompassing DNA binding sites, interacting proteins, and transcriptional response to genetic perturbation. We confirm the expected diversity in DNA binding motifs and genomic binding sites, and provide motif models for 78 previously uncharacterized C2H2-ZF proteins, most of which are unique. Surprisingly, the diversity in protein-protein interactions is nearly as high as diversity in DNA binding motifs: Most C2H2-ZF proteins interact with a unique spectrum of co-activators and co-repressors. Thus, multiparameter diversification likely underlies the evolutionary success of this large class of human proteins.
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Affiliation(s)
- Frank W Schmitges
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada
| | - Ernest Radovani
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Hamed S Najafabadi
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada
| | - Marjan Barazandeh
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada
| | - Laura F Campitelli
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Yimeng Yin
- Department of Biosciences and Nutrition, Karolinska Institutet, SE 141 83, Sweden
| | - Arttu Jolma
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada.,Department of Biosciences and Nutrition, Karolinska Institutet, SE 141 83, Sweden
| | - Guoqing Zhong
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada
| | - Hongbo Guo
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada
| | - Tharsan Kanagalingam
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada
| | - Wei F Dai
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada
| | - Jussi Taipale
- Department of Biosciences and Nutrition, Karolinska Institutet, SE 141 83, Sweden
| | - Andrew Emili
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Jack F Greenblatt
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Timothy R Hughes
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario M5S 3E1, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada
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38
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Abstract
Zinc finger proteins are the largest transcription factor family in human genome. The diverse combinations and functions of zinc finger motifs make zinc finger proteins versatile in biological processes, including development, differentiation, metabolism and autophagy. Over the last few decades, increasing evidence reveals the potential roles of zinc finger proteins in cancer progression. However, the underlying mechanisms of zinc finger proteins in cancer progression vary in different cancer types and even in the same cancer type under different types of stress. Here, we discuss general mechanisms of zinc finger proteins in transcription regulation and summarize recent studies on zinc finger proteins in cancer progression. In this review, we also emphasize the importance of further investigations in elucidating the underlying mechanisms of zinc finger proteins in cancer progression.
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Affiliation(s)
- Jayu Jen
- Department of Pharmacology, College of Medicine, National Cheng Kung University, No.1, University Road, Tainan, 70101, Taiwan, Republic of China
| | - Yi-Ching Wang
- Department of Pharmacology, College of Medicine, National Cheng Kung University, No.1, University Road, Tainan, 70101, Taiwan, Republic of China. .,Department of Basic Medical Sciences, College of Medicine, National Cheng Kung University, No.1, University Road, Tainan, 70101, Taiwan, Republic of China.
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39
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Tremblay C, Bédard M, Bonin MA, Lavigne P. Solution structure of the 13th C2H2 Zinc Finger of Miz-1. Biochem Biophys Res Commun 2016; 473:471-5. [PMID: 26972249 DOI: 10.1016/j.bbrc.2016.03.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Accepted: 03/08/2016] [Indexed: 10/22/2022]
Abstract
Miz-1 is a BTB/POZ transcription factor that contains 13C2H2 Zinc Finger domains (ZF). Miz-1 transactivates and represses the transcription of a myriad of genes involved in many aspects of the biology of the cell. The detailed molecular interactions through which Miz-1 controls transcription, including its specific DNA binding via its ZF domains, remain to be understood and documented. In our effort to shed light into the structural biology of Miz-1, we have undertaken the determination of the structure of all its ZF and the characterization of their interactions with cognate DNA. The structure of ZF 1 to 10 have already been solved and characterized. Here, we present the structure of the synthetic Miz-1 ZF13 determined by 2D (1)H-(1)H NMR.
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Affiliation(s)
- Cynthia Tremblay
- Département de Biochimie, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec, Canada; Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, Canada; PROTEO; Regroupement Stratégique sur la Fonction, la Structure et l'Ingénierie des Protéines, Université Laval, Québec, Québec, Canada; GRASP; Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montréal, Québec, Canada
| | - Mikaël Bédard
- Département de Biochimie, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec, Canada; Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, Canada; PROTEO; Regroupement Stratégique sur la Fonction, la Structure et l'Ingénierie des Protéines, Université Laval, Québec, Québec, Canada; GRASP; Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montréal, Québec, Canada
| | - Marc-André Bonin
- Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, Canada
| | - Pierre Lavigne
- Département de Biochimie, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Québec, Canada; Institut de Pharmacologie de Sherbrooke, Université de Sherbrooke, Sherbrooke, Canada; PROTEO; Regroupement Stratégique sur la Fonction, la Structure et l'Ingénierie des Protéines, Université Laval, Québec, Québec, Canada; GRASP; Groupe de Recherche Axé sur la Structure des Protéines, McGill University, Montréal, Québec, Canada.
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40
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Hamed MY, Arya G. Zinc finger protein binding to DNA: an energy perspective using molecular dynamics simulation and free energy calculations on mutants of both zinc finger domains and their specific DNA bases. J Biomol Struct Dyn 2016. [PMID: 26196228 DOI: 10.1080/07391102.2015.1068224] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Energy calculations based on MM-GBSA were employed to study various zinc finger protein (ZF) motifs binding to DNA. Mutants of both the DNA bound to their specific amino acids were studied. Calculated energies gave evidence for a relationship between binding energy and affinity of ZF motifs to their sites on DNA. ΔG values were -15.82(12), -3.66(12), and -12.14(11.6) kcal/mol for finger one, finger two, and finger three, respectively. The mutations in the DNA bases reduced the value of the negative energies of binding (maximum value for ΔΔG = 42Kcal/mol for F1 when GCG mutated to GGG, and ΔΔG = 22 kcal/mol for F2, the loss in total energy of binding originated in the loss in electrostatic energies upon mutation (r = .98). The mutations in key amino acids in the ZF motif in positions-1, 2, 3, and 6 showed reduced binding energies to DNA with correlation coefficients between total free energy and electrostatic was .99 and with Van der Waal was .93. Results agree with experimentally found selectivity which showed that Arginine in position-1 is specific to G, while Aspartic acid (D) in position 2 plays a complicated role in binding. There is a correlation between the MD calculated free energies of binding and those obtained experimentally for prepared ZF motifs bound to triplet bases in other reports (), our results may help in the design of ZF motifs based on the established recognition codes based on energies and contributing energies to the total energy.
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Affiliation(s)
- Mazen Y Hamed
- a Department of Chemistry , Birzeit University , P. O. Box 14 Birzeit, Palestine
| | - Gaurav Arya
- b Department of Nanoengineering , University of California , San Diego, 9500 Gilman Dr., MC-0448, La Jolla , CA 92093-0448 , USA
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41
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Wolf G, Greenberg D, Macfarlan TS. Spotting the enemy within: Targeted silencing of foreign DNA in mammalian genomes by the Krüppel-associated box zinc finger protein family. Mob DNA 2015; 6:17. [PMID: 26435754 PMCID: PMC4592553 DOI: 10.1186/s13100-015-0050-8] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Accepted: 09/24/2015] [Indexed: 12/17/2022] Open
Abstract
Tandem C2H2-type zinc finger proteins (ZFPs) constitute the largest transcription factor family in animals. Tandem-ZFPs bind DNA in a sequence-specific manner through arrays of multiple zinc finger domains that allow high flexibility and specificity in target recognition. In tetrapods, a large proportion of tandem-ZFPs contain Krüppel-associated-box (KRAB) repression domains, which are able to induce epigenetic silencing through the KAP1 corepressor. The KRAB-ZFP family continuously amplified in tetrapods through segmental gene duplications, often accompanied by deletions, duplications, and mutations of the zinc finger domains. As a result, tetrapod genomes contain unique sets of KRAB-ZFP genes, consisting of ancient and recently evolved family members. Although several hundred human and mouse KRAB-ZFPs have been identified or predicted, the biological functions of most KRAB-ZFP family members have gone unexplored. Furthermore, the evolutionary forces driving the extraordinary KRAB-ZFP expansion and diversification have remained mysterious for decades. In this review, we highlight recent studies that associate KRAB-ZFPs with the repression of parasitic DNA elements in the mammalian germ line and discuss the hypothesis that the KRAB-ZFP family primarily evolved as an adaptive genomic surveillance system against foreign DNA. Finally, we comment on the computational, genetic, and biochemical challenges of studying KRAB-ZFPs and attempt to predict how these challenges may be soon overcome.
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Affiliation(s)
- Gernot Wolf
- The Eunice Kennedy Shriver National Institute of Child Health and Human Development, The National Institutes of Health, Bethesda, MD 20892 USA
| | - David Greenberg
- The Gladstone Institute of Virology and Immunology, University of California, San Francisco, CA 94158 USA ; Present address: Pacific Biosciences, 1380 Willow Road, Menlo Park, CA 94025 USA
| | - Todd S Macfarlan
- The Eunice Kennedy Shriver National Institute of Child Health and Human Development, The National Institutes of Health, Bethesda, MD 20892 USA
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Garton M, Najafabadi HS, Schmitges FW, Radovani E, Hughes TR, Kim PM. A structural approach reveals how neighbouring C2H2 zinc fingers influence DNA binding specificity. Nucleic Acids Res 2015; 43:9147-57. [PMID: 26384429 PMCID: PMC4627083 DOI: 10.1093/nar/gkv919] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 09/05/2015] [Indexed: 12/28/2022] Open
Abstract
Development of an accurate protein–DNA recognition code that can predict DNA specificity from protein sequence is a central problem in biology. C2H2 zinc fingers constitute by far the largest family of DNA binding domains and their binding specificity has been studied intensively. However, despite decades of research, accurate prediction of DNA specificity remains elusive. A major obstacle is thought to be the inability of current methods to account for the influence of neighbouring domains. Here we show that this problem can be addressed using a structural approach: we build structural models for all C2H2-ZF–DNA complexes with known binding motifs and find six distinct binding modes. Each mode changes the orientation of specificity residues with respect to the DNA, thereby modulating base preference. Most importantly, the structural analysis shows that residues at the domain interface strongly and predictably influence the binding mode, and hence specificity. Accounting for predicted binding mode significantly improves prediction accuracy of predicted motifs. This new insight into the fundamental behaviour of C2H2-ZFs has implications for both improving the prediction of natural zinc finger-binding sites, and for prioritizing further experiments to complete the code. It also provides a new design feature for zinc finger engineering.
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Affiliation(s)
- Michael Garton
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto M5S 3E1, Canada
| | - Hamed S Najafabadi
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto M5S 3E1, Canada
| | - Frank W Schmitges
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto M5S 3E1, Canada
| | - Ernest Radovani
- Department of Molecular Genetics, University of Toronto, Toronto M5S 1A8, Canada
| | - Timothy R Hughes
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto M5S 3E1, Canada Department of Molecular Genetics, University of Toronto, Toronto M5S 1A8, Canada
| | - Philip M Kim
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto M5S 3E1, Canada Department of Molecular Genetics, University of Toronto, Toronto M5S 1A8, Canada Department of Computer Science, University of Toronto, Toronto M5S 2E4, Canada
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43
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Grimmer MR, Farnham PJ. Can genome engineering be used to target cancer-associated enhancers? Epigenomics 2015; 6:493-501. [PMID: 25431942 DOI: 10.2217/epi.14.30] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Transcriptional misregulation is involved in the development of many diseases, especially neoplastic transformation. Distal regulatory elements, such as enhancers, play a major role in specifying cell-specific transcription patterns in both normal and diseased tissues, suggesting that enhancers may be prime targets for therapeutic intervention. By focusing on modulating gene regulation mediated by cell type-specific enhancers, there is hope that normal epigenetic patterning in an affected tissue could be restored with fewer side effects than observed with treatments employing relatively nonspecific inhibitors such as epigenetic drugs. New methods employing genomic nucleases and site-specific epigenetic regulators targeted to specific genomic regions, using either artificial DNA-binding proteins or RNA-DNA interactions, may allow precise genome engineering at enhancers. However, this field is still in its infancy and further refinements that increase specificity and efficiency are clearly required.
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Affiliation(s)
- Matthew R Grimmer
- Norris Comprehensive Cancer Center, Keck School of Medicine, University of Southern California, Los Angeles, CA 90089-9601, USA
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Phylogenic analysis revealed an expanded C₂H₂-homeobox subfamily and expression profiles of C₂H₂ zinc finger gene family in Verticillium dahliae. Gene 2015; 562:169-79. [PMID: 25725127 DOI: 10.1016/j.gene.2015.02.063] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 02/23/2015] [Indexed: 01/26/2023]
Abstract
C2H2 zinc finger (CZF) proteins are a major class of transcription factors that play crucial roles in fungal growth, development, various stress responses, and virulence. Little genome-wide data is available regarding the roles of CZF proteins in Verticillium dahliae, a destructive pathogen that causes vascular wilt disease in more than 200 plant species. We identified a total of 79 typical CZF genes in V. dahliae. Comparative analysis revealed that four plant pathogenic fungi, V. dahliae, Fusarium oxysporum, Magnaporthe oryzae, and Botrytis cinerea, have comparable numbers of predicted CZF genes with similar characteristics. Phylogenetic analysis identified a C2H2-homeobox subfamily in V. dahliae containing seven genes with similar gene structures. V. dahliae and F. oxysporum (Hypocreomycetidae) have more genes of this subfamily than M. oryzae (Sordariomycetidae) and B. cinerea (Leotiomycetes). Furthermore, gene-expression analysis of the smoke tree wilt fungus V. dahliae strain XS11 using digital gene-expression profiling and RT-qPCR revealed that a number of CZF genes were differentially expressed during microsclerotia formation, nutritional starvation, and simulated in planta conditions. Furthermore, the expression profiles revealed that some CZF genes were overrepresented during multiple stages, indicating that they might play diverse roles. Our results provide useful information concerning the functions of CZF genes in microsclerotia formation, nutritional stress responses, and pathogenicity in V. dahliae, and form a basis for future functional studies of these genes.
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45
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Feng X, Che N, Liu Y, Chen H, Wang D, Li X, Chen W, Ma X, Hua B, Gao X, Tsao BP, Sun L. Restored immunosuppressive effect of mesenchymal stem cells on B cells after olfactory 1/early B cell factor-associated zinc-finger protein down-regulation in patients with systemic lupus erythematosus. Arthritis Rheumatol 2015; 66:3413-23. [PMID: 25219468 DOI: 10.1002/art.38879] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Accepted: 09/09/2014] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To evaluate whether olfactory 1/early B cell factor-associated zinc-finger protein (OAZ), a candidate lupus susceptibility gene involved in antinuclear antibody (ANA) production, plays a role in the regulation of B cells by mesenchymal stem cells (MSCs). METHODS MSCs derived from the bone marrow of patients with systemic lupus erythematosus (SLE) and healthy control subjects were expanded and incubated with small interfering RNAs specific for OAZ or a nontargeting sequence. Knockdown of messenger RNA levels of OAZ and its downstream genes was measured using real-time polymerase chain reaction, and protein levels of chemokine/cytokine and immunoglobulins were determined by enzyme-linked immunosorbent assay or Western blotting. The effects of modulating the OAZ levels in MSCs, by either silencing or overexpression, on B cell proliferation and terminal differentiation were assessed by coculturing MSCs with mouse spleen cells. RESULTS OAZ gene expression was highly enriched in MSCs compared with peripheral blood leukocytes and was increased in patients with SLE compared with control subjects. After the silencing of OAZ expression, SLE MSCs could regain the ability to inhibit B cell proliferation and terminal differentiation, as indicated by decreased percentages of bromodeoxyuridine-positive cells and CD138+ cells as well as decreased levels of IgG, IgM, and ANAs. The level of CCL2 was increased after OAZ knockdown, while anti-CCL2 antibodies completely counteracted the effect of OAZ silencing. Umbilical cord-derived normal MSCs that overexpressed OAZ had a diminished ability to inhibit B cell proliferation and terminal differentiation. CONCLUSION OAZ down-regulation could restore the impaired function of SLE MSCs in the immune regulation of B cells, contributing to a reduction in ANA levels. OAZ might represent a new target for therapy in patients with SLE.
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Affiliation(s)
- Xuebing Feng
- The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
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Najafabadi HS, Mnaimneh S, Schmitges FW, Garton M, Lam KN, Yang A, Albu M, Weirauch MT, Radovani E, Kim PM, Greenblatt J, Frey BJ, Hughes TR. C2H2 zinc finger proteins greatly expand the human regulatory lexicon. Nat Biotechnol 2015; 33:555-62. [PMID: 25690854 DOI: 10.1038/nbt.3128] [Citation(s) in RCA: 229] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Accepted: 12/15/2014] [Indexed: 12/11/2022]
Abstract
Cys2-His2 zinc finger (C2H2-ZF) proteins represent the largest class of putative human transcription factors. However, for most C2H2-ZF proteins it is unknown whether they even bind DNA or, if they do, to which sequences. Here, by combining data from a modified bacterial one-hybrid system with protein-binding microarray and chromatin immunoprecipitation analyses, we show that natural C2H2-ZFs encoded in the human genome bind DNA both in vitro and in vivo, and we infer the DNA recognition code using DNA-binding data for thousands of natural C2H2-ZF domains. In vivo binding data are generally consistent with our recognition code and indicate that C2H2-ZF proteins recognize more motifs than all other human transcription factors combined. We provide direct evidence that most KRAB-containing C2H2-ZF proteins bind specific endogenous retroelements (EREs), ranging from currently active to ancient families. The majority of C2H2-ZF proteins, including KRAB proteins, also show widespread binding to regulatory regions, indicating that the human genome contains an extensive and largely unstudied adaptive C2H2-ZF regulatory network that targets a diverse range of genes and pathways.
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Affiliation(s)
- Hamed S Najafabadi
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario, Canada
| | - Sanie Mnaimneh
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario, Canada
| | - Frank W Schmitges
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario, Canada
| | - Michael Garton
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario, Canada
| | - Kathy N Lam
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Ally Yang
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario, Canada
| | - Mihai Albu
- Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario, Canada
| | - Matthew T Weirauch
- 1] Center for Autoimmune Genomics and Etiology (CAGE) and Divisions of Biomedical Informatics and Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA. [2] Canadian Institutes for Advanced Research, Toronto, Ontario, Canada
| | - Ernest Radovani
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Philip M Kim
- 1] Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario, Canada. [2] Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada. [3] Department of Computer Science, University of Toronto, Toronto, Ontario, Canada
| | - Jack Greenblatt
- 1] Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario, Canada. [2] Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Brendan J Frey
- 1] Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario, Canada. [2] Canadian Institutes for Advanced Research, Toronto, Ontario, Canada. [3] Department of Computer Science, University of Toronto, Toronto, Ontario, Canada. [4] Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada
| | - Timothy R Hughes
- 1] Donnelly Centre for Cellular and Biomolecular Research, University of Toronto, Toronto, Ontario, Canada. [2] Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada. [3] Canadian Institutes for Advanced Research, Toronto, Ontario, Canada
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47
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Han D, Zhang C, Fan WJ, Pan WJ, Feng DM, Qu SL, Jiang ZS. Myocardial ischemic preconditioning upregulated protein 1(Mipu1):zinc finger protein 667 - a multifunctional KRAB/C2H2 zinc finger protein. ACTA ACUST UNITED AC 2014; 48:1-5. [PMID: 25493376 PMCID: PMC4288486 DOI: 10.1590/1414-431x20144029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 07/23/2014] [Indexed: 11/22/2022]
Abstract
Myocardial ischemic preconditioning upregulated protein 1 (Mipu1) is a newly discovered upregulated gene produced in rats during the myocardial ischemic preconditioning process. Mipu1 cDNA contains a 1824-base pair open reading frame and encodes a 608 amino acid protein with an N-terminal Krüppel-associated box (KRAB) domain and classical zinc finger C2H2 motifs in the C-terminus. Mipu1 protein is located in the cell nucleus. Recent studies found that Mipu1 has a protective effect on the ischemia-reperfusion injury of heart, brain, and other organs. As a nuclear factor, Mipu1 may perform its protective function through directly transcribing and repressing the expression of proapoptotic genes to repress cell apoptosis. In addition, Mipu1 also plays an important role in regulating the gene expression of downstream inflammatory mediators by inhibiting the activation of activator protein-1 and serum response element.
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Affiliation(s)
- D Han
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, Post-doctoral Mobile Stations for Basic Medicine, University of South China, Hengyang City, Hunan Province, PR China
| | - C Zhang
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, Post-doctoral Mobile Stations for Basic Medicine, University of South China, Hengyang City, Hunan Province, PR China
| | - W J Fan
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, Post-doctoral Mobile Stations for Basic Medicine, University of South China, Hengyang City, Hunan Province, PR China
| | - W J Pan
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, Post-doctoral Mobile Stations for Basic Medicine, University of South China, Hengyang City, Hunan Province, PR China
| | - D M Feng
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, Post-doctoral Mobile Stations for Basic Medicine, University of South China, Hengyang City, Hunan Province, PR China
| | - S L Qu
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, Post-doctoral Mobile Stations for Basic Medicine, University of South China, Hengyang City, Hunan Province, PR China
| | - Z S Jiang
- Institute of Cardiovascular Disease, Key Lab for Arteriosclerology of Hunan Province, Post-doctoral Mobile Stations for Basic Medicine, University of South China, Hengyang City, Hunan Province, PR China
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López-Perrote A, Alatwi HE, Torreira E, Ismail A, Ayora S, Downs JA, Llorca O. Structure of Yin Yang 1 oligomers that cooperate with RuvBL1-RuvBL2 ATPases. J Biol Chem 2014; 289:22614-22629. [PMID: 24990942 PMCID: PMC4132769 DOI: 10.1074/jbc.m114.567040] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Revised: 05/22/2014] [Indexed: 02/03/2023] Open
Abstract
Yin Yang 1 (YY1) is a transcription factor regulating proliferation and differentiation and is involved in cancer development. Oligomers of recombinant YY1 have been observed before, but their structure and DNA binding properties are not well understood. Here we find that YY1 assembles several homo-oligomeric species built from the association of a bell-shaped dimer, a process we characterized by electron microscopy. Moreover, we find that YY1 self-association also occurs in vivo using bimolecular fluorescence complementation. Unexpectedly, these oligomers recognize several DNA substrates without the consensus sequence for YY1 in vitro, and DNA binding is enhanced in the presence of RuvBL1-RuvBL2, two essential AAA+ ATPases. YY1 oligomers bind RuvBL1-RuvBL2 hetero-oligomeric complexes, but YY1 interacts preferentially with RuvBL1. Collectively, these findings suggest that YY1-RuvBL1-RuvBL2 complexes could contribute to functions beyond transcription, and we show that YY1 and the ATPase activity of RuvBL2 are required for RAD51 foci formation during homologous recombination.
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Affiliation(s)
- Andrés López-Perrote
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, Ramiro de Maetzu 9, 28040 Madrid, Spain
| | - Hanan E Alatwi
- Genome Damage and Stability Centre, University of Sussex, Science Park Road, Falmer, Brighton BN1 9RQ, United Kingdom, and
| | - Eva Torreira
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, Ramiro de Maetzu 9, 28040 Madrid, Spain
| | - Amani Ismail
- Genome Damage and Stability Centre, University of Sussex, Science Park Road, Falmer, Brighton BN1 9RQ, United Kingdom, and
| | - Silvia Ayora
- Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, Darwin 3, 28049 Madrid, Spain
| | - Jessica A Downs
- Genome Damage and Stability Centre, University of Sussex, Science Park Road, Falmer, Brighton BN1 9RQ, United Kingdom, and.
| | - Oscar Llorca
- Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas, Ramiro de Maetzu 9, 28040 Madrid, Spain,.
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The functional significance of common polymorphisms in zinc finger transcription factors. G3-GENES GENOMES GENETICS 2014; 4:1647-55. [PMID: 24970883 PMCID: PMC4169156 DOI: 10.1534/g3.114.012195] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Variants that alter the DNA-binding specificity of transcription factors could affect the specificity for and expression of potentially many target genes, as has been observed in several tumor-derived mutations. Here we examined if such trans expression quantitative trait loci (trans-eQTLs) could similarly result from common genetic variants. We chose to focus on the Cys2-His2 class of zinc finger transcription factors because they are the most abundant superfamily of transcription factors in human and have well-characterized DNA binding interactions. We identified 430 SNPs that cause missense substitutions in the DNA-contacting residues. Fewer common missense SNPs were found at DNA-contacting residues compared with non-DNA-contacting residues (P = 0.00006), consistent with possible functional selection against SNPs at DNA-contacting positions. Functional predictions based on zinc finger transcription factor (ZNF) DNA binding preferences also suggested that many common substitutions could potentially alter binding specificity. However, Hardy-Weinberg Equilibrium analysis and examination of seven orthologs within the primate lineage failed to find evidence of trans-eQTLs associated with the DNA-contacting positions or evidence of a different selection pressure on a contemporary and evolutionary timescales. The overall conclusion was that common SNPs that alter the DNA-contacting residues of these factors are unlikely to produce strong trans-eQTLs, consistent with the observations by others that trans-eQTLs in humans tend to be few and weak. Some rare SNPs might alter specificity and remained rare due to purifying selection. The study also underscores the need for large-scale eQTLs mapping efforts that might provide experimental evidence for SNPs that alter the choice of transcription factor binding sites.
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50
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Ming L, Wilk R, Reed BH, Lipshitz HD. Drosophila Hindsight and mammalian RREB-1 are evolutionarily conserved DNA-binding transcriptional attenuators. Differentiation 2014; 86:159-70. [PMID: 24418439 DOI: 10.1016/j.diff.2013.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Revised: 10/25/2013] [Accepted: 12/05/2013] [Indexed: 12/22/2022]
Abstract
The Drosophila Hindsight (hnt) gene encodes a C2H2-type Zinc-finger protein, HNT, that plays multiple developmental roles including control of embryonic germ band retraction and regulation of retinal cell fate and morphogenesis. While the developmental functions of the human HNT homolog, RREB-1, are unknown, it has been shown to function as a transcriptional modulator of several tumor suppressor genes. Here we investigate HNT's functional motifs, target genes and its regulatory abilities. We show that the C-terminal region of HNT, containing the last five of its 14 Zinc fingers, binds in vitro to DNA elements very similar to those identified for RREB-1. We map HNT's in vivo binding sites on salivary gland polytene chromosomes and define, at high resolution, where HNT is bound to two target genes, hnt itself and nervy (nvy). Data from both loss-of-function and over-expression experiments show that HNT attenuates the transcription of these two targets in a tissue-specific manner. RREB-1, when expressed in Drosophila, binds to the same polytene chromosome sites as HNT, attenuates expression of the hnt and nvy genes, and rescues the germ band retraction phenotype. HNT's ninth Zinc finger has degenerated or been lost in the vertebrate lineage. We show that a HNT protein mutant for this finger can also attenuate target gene expression and rescue germ band retraction. Thus HNT and RREB-1 are functional homologs at the level of DNA binding, transcriptional regulation and developmental control.
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Affiliation(s)
- Liang Ming
- Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada M5S 1A8.
| | - Ronit Wilk
- Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada M5S 1A8.
| | - Bruce H Reed
- Department of Biology, University of Waterloo, 200 University Avenue W, Waterloo, Ontario, Canada N2L 3G1.
| | - Howard D Lipshitz
- Department of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada M5S 1A8.
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