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Wang B, Vartak R, Zaltsman Y, Naing ZZC, Hennick KM, Polacco BJ, Bashir A, Eckhardt M, Bouhaddou M, Xu J, Sun N, Lasser MC, Zhou Y, McKetney J, Guiley KZ, Chan U, Kaye JA, Chadha N, Cakir M, Gordon M, Khare P, Drake S, Drury V, Burke DF, Gonzalez S, Alkhairy S, Thomas R, Lam S, Morris M, Bader E, Seyler M, Baum T, Krasnoff R, Wang S, Pham P, Arbalaez J, Pratt D, Chag S, Mahmood N, Rolland T, Bourgeron T, Finkbeiner S, Swaney DL, Bandyopadhay S, Ideker T, Beltrao P, Willsey HR, Obernier K, Nowakowski TJ, Hüttenhain R, State MW, Willsey AJ, Krogan NJ. A foundational atlas of autism protein interactions reveals molecular convergence. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2023.12.03.569805. [PMID: 38076945 PMCID: PMC10705567 DOI: 10.1101/2023.12.03.569805] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
Translating high-confidence (hc) autism spectrum disorder (ASD) genes into viable treatment targets remains elusive. We constructed a foundational protein-protein interaction (PPI) network in HEK293T cells involving 100 hcASD risk genes, revealing over 1,800 PPIs (87% novel). Interactors, expressed in the human brain and enriched for ASD but not schizophrenia genetic risk, converged on protein complexes involved in neurogenesis, tubulin biology, transcriptional regulation, and chromatin modification. A PPI map of 54 patient-derived missense variants identified differential physical interactions, and we leveraged AlphaFold-Multimer predictions to prioritize direct PPIs and specific variants for interrogation in Xenopus tropicalis and human forebrain organoids. A mutation in the transcription factor FOXP1 led to reconfiguration of DNA binding sites and altered development of deep cortical layer neurons in forebrain organoids. This work offers new insights into molecular mechanisms underlying ASD and describes a powerful platform to develop and test therapeutic strategies for many genetically-defined conditions.
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Wang T, Wang X, Liu Z, Shi X, Ren W, Huang B, Liang H, Wang C, Chai W. Genotypes and haplotype combination of DCAF7 gene sequence variants are associated with number of thoracolumbar vertebrae and carcass traits in Dezhou donkey. JOURNAL OF APPLIED ANIMAL RESEARCH 2023. [DOI: 10.1080/09712119.2022.2149538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Tianqi Wang
- Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, Agricultural Science and Engineering School, Liaocheng University, Liaocheng, People’s Republic of China
| | - Xinrui Wang
- Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, Agricultural Science and Engineering School, Liaocheng University, Liaocheng, People’s Republic of China
| | - Ziwen Liu
- Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, Agricultural Science and Engineering School, Liaocheng University, Liaocheng, People’s Republic of China
| | - Xiaoyuan Shi
- Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, Agricultural Science and Engineering School, Liaocheng University, Liaocheng, People’s Republic of China
| | - Wei Ren
- Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, Agricultural Science and Engineering School, Liaocheng University, Liaocheng, People’s Republic of China
| | - Bingjian Huang
- Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, Agricultural Science and Engineering School, Liaocheng University, Liaocheng, People’s Republic of China
| | - Huili Liang
- Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, Agricultural Science and Engineering School, Liaocheng University, Liaocheng, People’s Republic of China
| | - Changfa Wang
- Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, Agricultural Science and Engineering School, Liaocheng University, Liaocheng, People’s Republic of China
| | - Wenqiong Chai
- Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, Agricultural Science and Engineering School, Liaocheng University, Liaocheng, People’s Republic of China
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3
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Ananthapadmanabhan V, Shows KH, Dickinson AJ, Litovchick L. Insights from the protein interaction Universe of the multifunctional "Goldilocks" kinase DYRK1A. Front Cell Dev Biol 2023; 11:1277537. [PMID: 37900285 PMCID: PMC10600473 DOI: 10.3389/fcell.2023.1277537] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 10/02/2023] [Indexed: 10/31/2023] Open
Abstract
Human Dual specificity tyrosine (Y)-Regulated Kinase 1A (DYRK1A) is encoded by a dosage-dependent gene located in the Down syndrome critical region of human chromosome 21. The known substrates of DYRK1A include proteins involved in transcription, cell cycle control, DNA repair and other processes. However, the function and regulation of this kinase is not fully understood, and the current knowledge does not fully explain the dosage-dependent function of this kinase. Several recent proteomic studies identified DYRK1A interacting proteins in several human cell lines. Interestingly, several of known protein substrates of DYRK1A were undetectable in these studies, likely due to a transient nature of the kinase-substrate interaction. It is possible that the stronger-binding DYRK1A interacting proteins, many of which are poorly characterized, are involved in regulatory functions by recruiting DYRK1A to the specific subcellular compartments or distinct signaling pathways. Better understanding of these DYRK1A-interacting proteins could help to decode the cellular processes regulated by this important protein kinase during embryonic development and in the adult organism. Here, we review the current knowledge of the biochemical and functional characterization of the DYRK1A protein-protein interaction network and discuss its involvement in human disease.
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Affiliation(s)
- Varsha Ananthapadmanabhan
- Department of Internal Medicine, Division of Hematology, Oncology and Palliative Care, Virginia Commonwealth University, Richmond, VA, United States
| | - Kathryn H. Shows
- Department of Biology, Virginia State University, Petersburg, VA, United States
| | - Amanda J. Dickinson
- Department of Biology, Virginia Commonwealth University, Richmond, VA, United States
| | - Larisa Litovchick
- Department of Internal Medicine, Division of Hematology, Oncology and Palliative Care, Virginia Commonwealth University, Richmond, VA, United States
- Massey Cancer Center, Richmond, VA, United States
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Lindberg MF, Meijer L. Dual-Specificity, Tyrosine Phosphorylation-Regulated Kinases (DYRKs) and cdc2-Like Kinases (CLKs) in Human Disease, an Overview. Int J Mol Sci 2021; 22:6047. [PMID: 34205123 PMCID: PMC8199962 DOI: 10.3390/ijms22116047] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/26/2021] [Accepted: 05/28/2021] [Indexed: 01/09/2023] Open
Abstract
Dual-specificity tyrosine phosphorylation-regulated kinases (DYRK1A, 1B, 2-4) and cdc2-like kinases (CLK1-4) belong to the CMGC group of serine/threonine kinases. These protein kinases are involved in multiple cellular functions, including intracellular signaling, mRNA splicing, chromatin transcription, DNA damage repair, cell survival, cell cycle control, differentiation, homocysteine/methionine/folate regulation, body temperature regulation, endocytosis, neuronal development, synaptic plasticity, etc. Abnormal expression and/or activity of some of these kinases, DYRK1A in particular, is seen in many human nervous system diseases, such as cognitive deficits associated with Down syndrome, Alzheimer's disease and related diseases, tauopathies, dementia, Pick's disease, Parkinson's disease and other neurodegenerative diseases, Phelan-McDermid syndrome, autism, and CDKL5 deficiency disorder. DYRKs and CLKs are also involved in diabetes, abnormal folate/methionine metabolism, osteoarthritis, several solid cancers (glioblastoma, breast, and pancreatic cancers) and leukemias (acute lymphoblastic leukemia, acute megakaryoblastic leukemia), viral infections (influenza, HIV-1, HCMV, HCV, CMV, HPV), as well as infections caused by unicellular parasites (Leishmania, Trypanosoma, Plasmodium). This variety of pathological implications calls for (1) a better understanding of the regulations and substrates of DYRKs and CLKs and (2) the development of potent and selective inhibitors of these kinases and their evaluation as therapeutic drugs. This article briefly reviews the current knowledge about DYRK/CLK kinases and their implications in human disease.
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Affiliation(s)
| | - Laurent Meijer
- Perha Pharmaceuticals, Perharidy Peninsula, 29680 Roscoff, France;
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Yu D, Cattoglio C, Xue Y, Zhou Q. A complex between DYRK1A and DCAF7 phosphorylates the C-terminal domain of RNA polymerase II to promote myogenesis. Nucleic Acids Res 2019; 47:4462-4475. [PMID: 30864669 PMCID: PMC6511856 DOI: 10.1093/nar/gkz162] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 02/24/2019] [Accepted: 03/02/2019] [Indexed: 12/11/2022] Open
Abstract
The general transcription factor P-TEFb, a master regulator of RNA polymerase (Pol) II elongation, phosphorylates the C-terminal domain (CTD) of Pol II and negative elongation factors to release Pol II from promoter-proximal pausing. We show here that P-TEFb surprisingly inhibits the myoblast differentiation into myotubes, and that P-TEFb and its two positive complexes are eliminated in this process. In contrast, DYRK1A, another CTD kinase known to control transcription of a subset of genes important for development and tissue homeostasis, is found to activate transcription of key myogenic genes. We show that active DYRK1A exists in a complex with the WD40-repeat protein DCAF7 that stabilizes and tethers DYRK1A to Pol II, so that DYRK1A-DCAF7 can co-migrate with and phosphorylate Pol II along the myogenic gene loci. Thus, DCAF7 modulates the kinase signaling output of DYRK1A on Pol II to stimulate myogenic transcription after active P-TEFb function is shut off.
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Affiliation(s)
- Dan Yu
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA
- State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen University, Xiamen, China
| | - Claudia Cattoglio
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA
- Howard Hughes Medical Institute, University of California, Berkeley, Berkeley, CA 94720, USA
| | - Yuhua Xue
- State Key Laboratory of Cellular Stress Biology, School of Pharmaceutical Sciences, Xiamen University, Xiamen, China
| | - Qiang Zhou
- Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA
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Yousefelahiyeh M, Xu J, Alvarado E, Yu Y, Salven D, Nissen RM. DCAF7/WDR68 is required for normal levels of DYRK1A and DYRK1B. PLoS One 2018; 13:e0207779. [PMID: 30496304 PMCID: PMC6264848 DOI: 10.1371/journal.pone.0207779] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 10/12/2018] [Indexed: 12/18/2022] Open
Abstract
Overexpression of the Dual-specificity Tyrosine Phosphorylation-Regulated Kinase 1A (DYRK1A) gene contributes to the retardation, craniofacial anomalies, cognitive impairment, and learning and memory deficits associated with Down Syndrome (DS). DCAF7/HAN11/WDR68 (hereafter WDR68) binds DYRK1A and is required for craniofacial development. Accumulating evidence suggests DYRK1A-WDR68 complexes enable proper growth and patterning of multiple organ systems and suppress inappropriate cell growth/transformation by regulating the balance between proliferation and differentiation in multiple cellular contexts. Here we report, using engineered mouse C2C12 and human HeLa cell lines, that WDR68 is required for normal levels of DYRK1A. However, Wdr68 does not significantly regulate Dyrk1a mRNA expression levels and proteasome inhibition did not restore DYRK1A in cells lacking Wdr68 (Δwdr68 cells). Overexpression of WDR68 increased DYRK1A levels while overexpression of DYRK1A had no effect on WDR68 levels. We further report that WDR68 is similarly required for normal levels of the closely related DYRK1B kinase and that both DYRK1A and DYRK1B are essential for the transition from proliferation to differentiation in C2C12 cells. These findings reveal an additional role of WDR68 in DYRK1A-WDR68 and DYRK1B-WDR68 complexes.
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Affiliation(s)
- Mina Yousefelahiyeh
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - Jingyi Xu
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - Estibaliz Alvarado
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - Yang Yu
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - David Salven
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - Robert M. Nissen
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
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Xiang J, Yang S, Xin N, Gaertig MA, Reeves RH, Li S, Li XJ. DYRK1A regulates Hap1-Dcaf7/WDR68 binding with implication for delayed growth in Down syndrome. Proc Natl Acad Sci U S A 2017; 114:E1224-E1233. [PMID: 28137862 PMCID: PMC5321030 DOI: 10.1073/pnas.1614893114] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Huntingtin-associated protein 1 (Hap1) is known to be critical for postnatal hypothalamic function and growth. Hap1 forms stigmoid bodies (SBs), unique neuronal cytoplasmic inclusions of unknown function that are enriched in hypothalamic neurons. Here we developed a simple strategy to isolate the SB-enriched fraction from mouse brain. By analyzing Hap1 immunoprecipitants from this fraction, we identified a Hap1-interacting SB component, DDB1 and CUL4 associated factor 7 (Dcaf7)/WD40 repeat 68 (WDR68), whose protein level and nuclear translocation are regulated by Hap1. Moreover, we found that Hap1 bound Dcaf7 competitively in cytoplasm with dual-specificity tyrosine phosphorylation-regulated kinase 1A (DYRK1A), a protein implicated in Down syndrome (DS). Depleting Hap1 promoted the DYRK1A-Dcaf7 interaction and increased the DYRK1A protein level. Transgenic DS mice overexpressing DYRK1A showed reduced Hap1-Dcaf7 association in the hypothalamus. Furthermore, the overexpression of DYRK1A in the hypothalamus led to delayed growth in postnatal mice, suggesting that DYRK1A regulates the Hap1-Dcaf7 interaction and postnatal growth and that targeting Hap1 or Dcaf7 could ameliorate growth retardation in DS.
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Affiliation(s)
- Jianxing Xiang
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA 30322
| | - Su Yang
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA 30322
| | - Ning Xin
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA 30322
| | - Marta A Gaertig
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA 30322
| | - Roger H Reeves
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD 21205
- Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205
| | - Shihua Li
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA 30322;
| | - Xiao-Jiang Li
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA 30322;
- Ministry of Education CNS Regeneration Collaborative Joint Laboratory, Guangdong-Hongkong-Macau Institute of CNS Regeneration, Jinan University, Guangzhou 510631, China
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Alvarado E, Yousefelahiyeh M, Alvarado G, Shang R, Whitman T, Martinez A, Yu Y, Pham A, Bhandari A, Wang B, Nissen RM. Wdr68 Mediates Dorsal and Ventral Patterning Events for Craniofacial Development. PLoS One 2016; 11:e0166984. [PMID: 27880803 PMCID: PMC5120840 DOI: 10.1371/journal.pone.0166984] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Accepted: 11/07/2016] [Indexed: 12/15/2022] Open
Abstract
Birth defects are among the leading causes of infant mortality and contribute substantially to illness and long-term disability. Defects in Bone Morphogenetic Protein (BMP) signaling are associated with cleft lip/palate. Many craniofacial syndromes are caused by defects in signaling pathways that pattern the cranial neural crest cells (CNCCs) along the dorsal-ventral axis. For example, auriculocondylar syndrome is caused by impaired Endothelin-1 (Edn1) signaling, and Alagille syndrome is caused by defects in Jagged-Notch signaling. The BMP, Edn1, and Jag1b pathways intersect because BMP signaling is required for ventral edn1 expression that, in turn, restricts jag1b to dorsal CNCC territory. In zebrafish, the scaffolding protein Wdr68 is required for edn1 expression and subsequent formation of the ventral Meckel’s cartilage as well as the dorsal Palatoquadrate. Here we report that wdr68 activity is required between the 17-somites and prim-5 stages, that edn1 functions downstream of wdr68, and that wdr68 activity restricts jag1b, hey1, and grem2 expression from ventral CNCC territory. Expression of dlx1a and dlx2a was also severely reduced in anterior dorsal and ventral 1st arch CNCC territory in wdr68 mutants. We also found that the BMP agonist isoliquiritigenin (ISL) can partially rescue lower jaw formation and edn1 expression in wdr68 mutants. However, we found no significant defects in BMP reporter induction or pSmad1/5 accumulation in wdr68 mutant cells or zebrafish. The Transforming Growth Factor Beta (TGF-β) signaling pathway is also known to be important for craniofacial development and can interfere with BMP signaling. Here we further report that TGF-β interference with BMP signaling was greater in wdr68 mutant cells relative to control cells. To determine whether interference might also act in vivo, we treated wdr68 mutant zebrafish embryos with the TGF-β signaling inhibitor SB431542 and found partial rescue of edn1 expression and craniofacial development. While ISL treatment failed, SB431542 partially rescued dlx2a expression in wdr68 mutants. Together these findings reveal an indirect role for Wdr68 in the BMP-Edn1-Jag1b signaling hierarchy and dorso-anterior expression of dlx1a/2a.
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Affiliation(s)
- Estibaliz Alvarado
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - Mina Yousefelahiyeh
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - Greg Alvarado
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - Robin Shang
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - Taryn Whitman
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - Andrew Martinez
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - Yang Yu
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - Annie Pham
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - Anish Bhandari
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - Bingyan Wang
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
| | - Robert M. Nissen
- Department of Biological Sciences, California State University Los Angeles, Los Angeles, California, United States of America
- * E-mail:
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9
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Ahi EP. Signalling pathways in trophic skeletal development and morphogenesis: Insights from studies on teleost fish. Dev Biol 2016; 420:11-31. [PMID: 27713057 DOI: 10.1016/j.ydbio.2016.10.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Revised: 10/02/2016] [Accepted: 10/03/2016] [Indexed: 12/12/2022]
Abstract
During the development of the vertebrate feeding apparatus, a variety of complicated cellular and molecular processes participate in the formation and integration of individual skeletal elements. The molecular mechanisms regulating the formation of skeletal primordia and their development into specific morphological structures are tightly controlled by a set of interconnected signalling pathways. Some of these pathways, such as Bmp, Hedgehog, Notch and Wnt, are long known for their pivotal roles in craniofacial skeletogenesis. Studies addressing the functional details of their components and downstream targets, the mechanisms of their interactions with other signals as well as their potential roles in adaptive morphological divergence, are currently attracting considerable attention. An increasing number of signalling pathways that had previously been described in different biological contexts have been shown to be important in the regulation of jaw skeletal development and morphogenesis. In this review, I provide an overview of signalling pathways involved in trophic skeletogenesis emphasizing studies of the most species-rich group of vertebrates, the teleost fish, which through their evolutionary history have undergone repeated episodes of spectacular trophic diversification.
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Affiliation(s)
- Ehsan Pashay Ahi
- Institute of Zoology, University of Graz, Universitätsplatz 2, A-8010 Graz, Austria; Institute of Life and Environmental Sciences, University of Iceland, Sturlugata 7, 101 Reykjavik, Iceland.
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10
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Glenewinkel F, Cohen MJ, King CR, Kaspar S, Bamberg-Lemper S, Mymryk JS, Becker W. The adaptor protein DCAF7 mediates the interaction of the adenovirus E1A oncoprotein with the protein kinases DYRK1A and HIPK2. Sci Rep 2016; 6:28241. [PMID: 27307198 PMCID: PMC4910162 DOI: 10.1038/srep28241] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 06/01/2016] [Indexed: 01/17/2023] Open
Abstract
DYRK1A is a constitutively active protein kinase that has a critical role in growth and development which functions by regulating cell proliferation, differentiation and survival. DCAF7 (also termed WDR68 or HAN11) is a cellular binding partner of DYRK1A and also regulates signalling by the protein kinase HIPK2. DCAF7 is an evolutionarily conserved protein with a single WD40 repeat domain and has no catalytic activity. We have defined a DCAF7 binding motif of 12 amino acids in the N-terminal domain of class 1 DYRKs that is functionally conserved in DYRK1 orthologs from Xenopus, Danio rerio and the slime mold Dictyostelium discoideum. A similar sequence was essential for DCAF7 binding to HIPK2, whereas the closely related HIPK1 family member did not bind DCAF7. Immunoprecipitation and pulldown experiments identified DCAF7 as an adaptor for the association of the adenovirus E1A protein with DYRK1A and HIPK2. Furthermore, DCAF7 was required for the hyperphosphorylation of E1A in DYRK1A or HIPK2 overexpressing cells. Our results characterize DCAF7 as a substrate recruiting subunit of DYRK1A and HIPK2 and suggest that it is required for the negative effect of DYRK1A on E1A-induced oncogenic transformation.
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Affiliation(s)
- Florian Glenewinkel
- Institute of Pharmacology and Toxicology, RWTH Aachen University, Aachen, Germany
| | - Michael J. Cohen
- Departments of Microbiology & Immunology and Oncology, University of Western Ontario, London, Ontario, Canada
| | - Cason R. King
- Departments of Microbiology & Immunology and Oncology, University of Western Ontario, London, Ontario, Canada
| | - Sophie Kaspar
- Institute of Pharmacology and Toxicology, RWTH Aachen University, Aachen, Germany
| | | | - Joe S. Mymryk
- Departments of Microbiology & Immunology and Oncology, University of Western Ontario, London, Ontario, Canada
| | - Walter Becker
- Institute of Pharmacology and Toxicology, RWTH Aachen University, Aachen, Germany
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11
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Leslie EJ, Carlson JC, Shaffer JR, Feingold E, Wehby G, Laurie CA, Jain D, Laurie CC, Doheny KF, McHenry T, Resick J, Sanchez C, Jacobs J, Emanuele B, Vieira AR, Neiswanger K, Lidral AC, Valencia-Ramirez LC, Lopez-Palacio AM, Valencia DR, Arcos-Burgos M, Czeizel AE, Field LL, Padilla CD, Cutiongco-de la Paz EMC, Deleyiannis F, Christensen K, Munger RG, Lie RT, Wilcox A, Romitti PA, Castilla EE, Mereb JC, Poletta FA, Orioli IM, Carvalho FM, Hecht JT, Blanton SH, Buxó CJ, Butali A, Mossey PA, Adeyemo WL, James O, Braimah RO, Aregbesola BS, Eshete MA, Abate F, Koruyucu M, Seymen F, Ma L, de Salamanca JE, Weinberg SM, Moreno L, Murray JC, Marazita ML. A multi-ethnic genome-wide association study identifies novel loci for non-syndromic cleft lip with or without cleft palate on 2p24.2, 17q23 and 19q13. Hum Mol Genet 2016; 25:2862-2872. [PMID: 27033726 DOI: 10.1093/hmg/ddw104] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Revised: 03/04/2016] [Accepted: 03/24/2016] [Indexed: 12/27/2022] Open
Abstract
Orofacial clefts (OFCs), which include non-syndromic cleft lip with or without cleft palate (CL/P), are among the most common birth defects in humans, affecting approximately 1 in 700 newborns. CL/P is phenotypically heterogeneous and has a complex etiology caused by genetic and environmental factors. Previous genome-wide association studies (GWASs) have identified at least 15 risk loci for CL/P. As these loci do not account for all of the genetic variance of CL/P, we hypothesized the existence of additional risk loci. We conducted a multiethnic GWAS in 6480 participants (823 unrelated cases, 1700 unrelated controls and 1319 case-parent trios) with European, Asian, African and Central and South American ancestry. Our GWAS revealed novel associations on 2p24 near FAM49A, a gene of unknown function (P = 4.22 × 10-8), and 19q13 near RHPN2, a gene involved in organizing the actin cytoskeleton (P = 4.17 × 10-8). Other regions reaching genome-wide significance were 1p36 (PAX7), 1p22 (ARHGAP29), 1q32 (IRF6), 8q24 and 17p13 (NTN1), all reported in previous GWASs. Stratification by ancestry group revealed a novel association with a region on 17q23 (P = 2.92 × 10-8) among individuals with European ancestry. This region included several promising candidates including TANC2, an oncogene required for development, and DCAF7, a scaffolding protein required for craniofacial development. In the Central and South American ancestry group, significant associations with loci previously identified in Asian or European ancestry groups reflected their admixed ancestry. In summary, we have identified novel CL/P risk loci and suggest new genes involved in craniofacial development, confirming the highly heterogeneous etiology of OFCs.
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Affiliation(s)
- Elizabeth J Leslie
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Jenna C Carlson
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA.,Department of Biostatistics
| | - John R Shaffer
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA.,Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Eleanor Feingold
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA.,Department of Biostatistics.,Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - George Wehby
- Department of Health Management and Policy, College of Public Health, University of Iowa, Iowa City, IA 52246, USA
| | - Cecelia A Laurie
- Department of Biostatistics, Genetic Coordinating Center, University of Washington, Seattle, WA 98195, USA
| | - Deepti Jain
- Department of Biostatistics, Genetic Coordinating Center, University of Washington, Seattle, WA 98195, USA
| | - Cathy C Laurie
- Department of Biostatistics, Genetic Coordinating Center, University of Washington, Seattle, WA 98195, USA
| | - Kimberly F Doheny
- Center for Inherited Disease Research, Johns Hopkins University, Baltimore, MD 21224, USA
| | - Toby McHenry
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Judith Resick
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Carla Sanchez
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Jennifer Jacobs
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Beth Emanuele
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Alexandre R Vieira
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA.,Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Katherine Neiswanger
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | | | | | | | - Dora Rivera Valencia
- Population Genetics and Mutacarcinogenesis Group, University of Antioquia, Medellin 050001, Colombia
| | - Mauricio Arcos-Burgos
- Genomics and Predictive Medicine, Genome Biology Department, John Curtin School of Medical Research, ANU College of Medicine, Biology & Environment, The Australian National University, Canberra, ACT 0200, Australia
| | - Andrew E Czeizel
- Foundation for the Community Control of Hereditary Diseases, Budapest 1051, Hungary
| | - L Leigh Field
- Department of Medical Genetics, University of British Columbia, Vancouver V6H 3N1, Canada
| | - Carmencita D Padilla
- Department of Pediatrics, College of Medicine; and Institute of Human Genetics, National Institutes of Health; University of the Philippines Manila, Manilla, The Philippines 1000.,Philippine Genome Center, University of the Philippines System, Manilla, The Philippines 1101
| | - Eva Maria C Cutiongco-de la Paz
- Department of Pediatrics, College of Medicine; and Institute of Human Genetics, National Institutes of Health; University of the Philippines Manila, Manilla, The Philippines 1000.,Philippine Genome Center, University of the Philippines System, Manilla, The Philippines 1101
| | - Frederic Deleyiannis
- Department of Surgery, Plastic and Reconstructive Surgery, University of Colorado School of Medicine, Denver, CO 80045, USA
| | - Kaare Christensen
- Department of Epidemiology, Institute of Public Health, University of Southern Denmark, Odense DK-5230 Denmark
| | - Ronald G Munger
- Department of Nutrition, Dietetics, and Food Sciences, Utah State University, Logan, UT 84322, USA
| | - Rolv T Lie
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, NO-5020 Norway
| | - Allen Wilcox
- Epidemiology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
| | | | - Eduardo E Castilla
- CEMIC: Center for Medical Education and Clinical Research, Buenos Aires 1431, Argentina.,Laboratory of Congenital Malformation Epidemiology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro 21040-360, Brazil.,ECLAMC (Latin American Collaborative Study of Congenital Malformations) at INAGEMP (National Institute of Population Medical Genetics)
| | - Juan C Mereb
- ECLAMC (Latin American Collaborative Study of Congenital Malformations) at Hospital de Area, El Bolson 8430, Argentina
| | - Fernando A Poletta
- CEMIC: Center for Medical Education and Clinical Research, Buenos Aires 1431, Argentina.,Laboratory of Congenital Malformation Epidemiology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro 21040-360, Brazil.,ECLAMC (Latin American Collaborative Study of Congenital Malformations) at INAGEMP (National Institute of Population Medical Genetics)
| | - Iêda M Orioli
- ECLAMC (Latin American Collaborative Study of Congenital Malformations) at INAGEMP (National Institute of Population Medical Genetics).,Department of Genetics, Institute of Biology, Federal University of Rio de Janeiro, Rio de Janeiro 21941-617, Brazil
| | - Flavia M Carvalho
- Laboratory of Congenital Malformation Epidemiology, Oswaldo Cruz Institute, FIOCRUZ, Rio de Janeiro 21040-360, Brazil.,ECLAMC (Latin American Collaborative Study of Congenital Malformations) at INAGEMP (National Institute of Population Medical Genetics)
| | - Jacqueline T Hecht
- Department of Pediatrics, University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Susan H Blanton
- Dr. John T. Macdonald Foundation Department of Human Genetics, Hussman Institute for Human Genomics, Mailman School of Medicine, University of Miami, Miami, FL 33124, USA
| | - Carmen J Buxó
- School of Dental Medicine, University of Puerto Rico, San Juan, Puerto Rico 00936
| | - Azeez Butali
- Department of Oral Pathology, Radiology and Medicine, Dows Institute for Dental Research, College of Dentistry
| | - Peter A Mossey
- Department of Orthodontics, University of Dundee, Dundee DD1 4HN, Scotland
| | - Wasiu L Adeyemo
- Department of Oral and Maxillofacial Surgery. College of Medicine, University of Lagos, Lagos P.M.B. 12003, Nigeria
| | - Olutayo James
- Department of Oral and Maxillofacial Surgery. College of Medicine, University of Lagos, Lagos P.M.B. 12003, Nigeria
| | - Ramat O Braimah
- Department of Oral and Maxillofacial Surgery, Obafemi Awolowo University, Ife-Ife P.M.B. 13, Nigeria
| | - Babatunde S Aregbesola
- Department of Oral and Maxillofacial Surgery, Obafemi Awolowo University, Ife-Ife P.M.B. 13, Nigeria
| | - Mekonen A Eshete
- Surgical Department, School of Medicine, Addis Ababa University, Addis Ababa, P.O. Box 26493, Ethiopia
| | - Fikre Abate
- Surgical Department, School of Medicine, Addis Ababa University, Addis Ababa, P.O. Box 26493, Ethiopia
| | - Mine Koruyucu
- Department of Pedodontics, Istanbul University, Istanbul 34116, Turkey
| | - Figen Seymen
- Department of Pedodontics, Istanbul University, Istanbul 34116, Turkey
| | - Lian Ma
- Peking University, School of Stomatology, Beijing 100081, China
| | | | - Seth M Weinberg
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | | | - Jeffrey C Murray
- Department of Pediatrics, Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA
| | - Mary L Marazita
- Department of Oral Biology, Center for Craniofacial and Dental Genetics, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA .,Department of Human Genetics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA 15261, USA.,Clinical and Translational Science, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
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12
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Shang L, Henderson LB, Cho MT, Petrey DS, Fong CT, Haude KM, Shur N, Lundberg J, Hauser N, Carmichael J, Innis J, Schuette J, Wu YW, Asaikar S, Pearson M, Folk L, Retterer K, Monaghan KG, Chung WK. De novo missense variants in PPP2R5D are associated with intellectual disability, macrocephaly, hypotonia, and autism. Neurogenetics 2015; 17:43-9. [PMID: 26576547 DOI: 10.1007/s10048-015-0466-9] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Accepted: 10/22/2015] [Indexed: 12/19/2022]
Abstract
Protein phosphatase 2A (PP2A) is a heterotrimeric protein serine/threonine phosphatase and is involved in a broad range of cellular processes. PPP2R5D is a regulatory B subunit of PP2A and plays an important role in regulating key neuronal and developmental regulation processes such as PI3K/AKT and glycogen synthase kinase 3 beta (GSK3β)-mediated cell growth, chromatin remodeling, and gene transcriptional regulation. Using whole-exome sequencing (WES), we identified four de novo variants in PPP2R5D in a total of seven unrelated individuals with intellectual disability (ID) and other shared clinical characteristics, including autism spectrum disorder, macrocephaly, hypotonia, seizures, and dysmorphic features. Among the four variants, two have been previously reported and two are novel. All four amino acids are highly conserved among the PP2A subunit family, and all change a negatively charged acidic glutamic acid (E) to a positively charged basic lysine (K) and are predicted to disrupt the PP2A subunit binding and impair the dephosphorylation capacity. Our data provides further support for PPP2R5D as a genetic cause of ID.
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Affiliation(s)
- Linshan Shang
- Department of Pediatrics, Columbia University Medical Center, New York, NY, USA
| | | | | | - Donald S Petrey
- Department of Biochemistry and Molecular Biophysics, Columbia University Medical Center, New York, NY, USA
| | - Chin-To Fong
- University of Rochester Medical Center, Rochester, NY, USA
| | | | | | | | | | | | - Jeffrey Innis
- Division of Pediatric Genetics, University of Michigan Health System, Ann Arbor, MI, USA
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Jane Schuette
- Division of Pediatric Genetics, University of Michigan Health System, Ann Arbor, MI, USA
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Yvonne W Wu
- Departments of Neurology and Pediatrics, University of California San Francisco, San Francisco, CA, USA
| | | | | | | | | | | | - Wendy K Chung
- Department of Pediatrics, Columbia University Medical Center, New York, NY, USA.
- Department of Medicine, Columbia University Medical Center, New York, NY, USA.
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13
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Ahi EP, Steinhäuser SS, Pálsson A, Franzdóttir SR, Snorrason SS, Maier VH, Jónsson ZO. Differential expression of the aryl hydrocarbon receptor pathway associates with craniofacial polymorphism in sympatric Arctic charr. EvoDevo 2015; 6:27. [PMID: 26388986 PMCID: PMC4574265 DOI: 10.1186/s13227-015-0022-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 09/04/2015] [Indexed: 12/03/2022] Open
Abstract
Background The developmental basis of craniofacial morphology hinges on interactions of numerous signalling systems. Extensive craniofacial variation in the polymorphic Arctic charr, a member of the salmonid family, from Lake Thingvallavatn (Iceland), offers opportunities to find and study such signalling pathways and their key regulators, thereby shedding light on the developmental pathways, and the genetics of trophic divergence. Results To identify genes involved in the craniofacial differences between benthic and limnetic Arctic charr, we used transcriptome data from different morphs, spanning early development, together with data on craniofacial expression patterns and skeletogenesis in model vertebrate species. Out of 20 genes identified, 7 showed lower gene expression in benthic than in limnetic charr morphs. We had previously identified a conserved gene network involved in extracellular matrix (ECM) organization and skeletogenesis, showing higher expression in developing craniofacial elements of benthic than in limnetic Arctic charr morphs. The present study adds a second set of genes constituting an expanded gene network with strong, benthic–limnetic differential expression. To identify putative upstream regulators, we performed knowledge-based motif enrichment analyses on the regulatory sequences of the identified genes which yielded potential binding sites for a set of known transcription factors (TFs). Of the 8 TFs that we examined using qPCR, two (Ahr2b and Ap2) were found to be differentially expressed between benthic and limnetic charr. Expression analysis of several known AhR targets indicated higher activity of the AhR pathway during craniofacial development in benthic charr morphotypes. Conclusion These results suggest a key role of the aryl hydrocarbon receptor (AhR) pathway in the observed craniofacial differences between distinct charr morphotypes. Electronic supplementary material The online version of this article (doi:10.1186/s13227-015-0022-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ehsan Pashay Ahi
- Institute of Life and Environmental Sciences, University of Iceland, Sturlugata 7, 101 Reykjavik, Iceland
| | - Sophie S Steinhäuser
- Biomedical Center, University of Iceland, Vatnsmýrarvegur 16, 101 Reykjavik, Iceland
| | - Arnar Pálsson
- Institute of Life and Environmental Sciences, University of Iceland, Sturlugata 7, 101 Reykjavik, Iceland ; Biomedical Center, University of Iceland, Vatnsmýrarvegur 16, 101 Reykjavik, Iceland
| | - Sigrídur Rut Franzdóttir
- Institute of Life and Environmental Sciences, University of Iceland, Sturlugata 7, 101 Reykjavik, Iceland
| | - Sigurdur S Snorrason
- Institute of Life and Environmental Sciences, University of Iceland, Sturlugata 7, 101 Reykjavik, Iceland
| | - Valerie H Maier
- Institute of Life and Environmental Sciences, University of Iceland, Sturlugata 7, 101 Reykjavik, Iceland ; Biomedical Center, University of Iceland, Vatnsmýrarvegur 16, 101 Reykjavik, Iceland
| | - Zophonías O Jónsson
- Institute of Life and Environmental Sciences, University of Iceland, Sturlugata 7, 101 Reykjavik, Iceland ; Biomedical Center, University of Iceland, Vatnsmýrarvegur 16, 101 Reykjavik, Iceland
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14
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Miyata Y, Shibata T, Aoshima M, Tsubata T, Nishida E. The molecular chaperone TRiC/CCT binds to the Trp-Asp 40 (WD40) repeat protein WDR68 and promotes its folding, protein kinase DYRK1A binding, and nuclear accumulation. J Biol Chem 2014; 289:33320-32. [PMID: 25342745 PMCID: PMC4246089 DOI: 10.1074/jbc.m114.586115] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 10/18/2014] [Indexed: 11/06/2022] Open
Abstract
Trp-Asp (WD) repeat protein 68 (WDR68) is an evolutionarily conserved WD40 repeat protein that binds to several proteins, including dual specificity tyrosine phosphorylation-regulated protein kinase (DYRK1A), MAPK/ERK kinase kinase 1 (MEKK1), and Cullin4-damage-specific DNA-binding protein 1 (CUL4-DDB1). WDR68 affects multiple and diverse physiological functions, such as controlling anthocyanin synthesis in plants, tissue growth in insects, and craniofacial development in vertebrates. However, the biochemical basis and the regulatory mechanism of WDR68 activity remain largely unknown. To better understand the cellular function of WDR68, here we have isolated and identified cellular WDR68 binding partners using a phosphoproteomic approach. More than 200 cellular proteins with wide varieties of biochemical functions were identified as WDR68-binding protein candidates. Eight T-complex protein 1 (TCP1) subunits comprising the molecular chaperone TCP1 ring complex/chaperonin-containing TCP1 (TRiC/CCT) were identified as major WDR68-binding proteins, and phosphorylation sites in both WDR68 and TRiC/CCT were identified. Co-immunoprecipitation experiments confirmed the binding between TRiC/CCT and WDR68. Computer-aided structural analysis suggested that WDR68 forms a seven-bladed β-propeller ring. Experiments with a series of deletion mutants in combination with the structural modeling showed that three of the seven β-propeller blades of WDR68 are essential and sufficient for TRiC/CCT binding. Knockdown of cellular TRiC/CCT by siRNA caused an abnormal WDR68 structure and led to reduction of its DYRK1A-binding activity. Concomitantly, nuclear accumulation of WDR68 was suppressed by the knockdown of TRiC/CCT, and WDR68 formed cellular aggregates when overexpressed in the TRiC/CCT-deficient cells. Altogether, our results demonstrate that the molecular chaperone TRiC/CCT is essential for correct protein folding, DYRK1A binding, and nuclear accumulation of WDR68.
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Affiliation(s)
- Yoshihiko Miyata
- From the Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan and
| | | | | | | | - Eisuke Nishida
- From the Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan and
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15
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Guedj F, Pennings JLA, Wick HC, Bianchi DW. Analysis of adult cerebral cortex and hippocampus transcriptomes reveals unique molecular changes in the Ts1Cje mouse model of down syndrome. Brain Pathol 2014; 25:11-23. [PMID: 24916381 DOI: 10.1111/bpa.12151] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Accepted: 05/07/2014] [Indexed: 12/22/2022] Open
Abstract
We investigated gene expression and functional differences between Ts1Cje mice and wild-type (WT) littermates in adult cerebral cortex and hippocampus. These two brain regions are affected in people with Down syndrome, but have not been previously molecularly characterized in Ts1Cje mice. Total RNA was prepared from the brains of 8-10-week-old Ts1Cje mice (n = 6) and WT littermates (n = 5) and hybridized to Affymetrix 1.0 ST gene mouse arrays. Differentially regulated genes were identified and used to perform in silico functional analyses to better characterize dysregulated pathways in both brain regions. Hippocampus had more significantly differentially expressed genes compared with cortex (30 vs. 7 at a Benjamini-Hochberg false discovery rate of 20%). We identified novel genes that were differentially regulated in adult brains, including Cyb5r1, Fsbp, Vmn2r110, Snd1 and Zhx2. Functional analyses in Ts1Cje mice highlighted the importance of NFAT signaling, oxidative stress, neuroinflammation and olfactory perception via G-protein signaling. In a comparison of adult Ts1Cje and WT brains, we identified new genes and pathway differences in the cortex and hippocampus. Our analyses identified physiologically relevant pathways that can serve as targets for the development of future treatments to improve neurocognition in Down syndrome.
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Affiliation(s)
- Faycal Guedj
- Mother Infant Research Institute, Floating Hospital for Children, Tufts Medical Center, Boston, MA, USA
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