101
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Hou Z, Su L, Pei J, Grishin NV, Zhang H. Crystal Structure of the CLOCK Transactivation Domain Exon19 in Complex with a Repressor. Structure 2017; 25:1187-1194.e3. [PMID: 28669630 DOI: 10.1016/j.str.2017.05.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 05/04/2017] [Accepted: 05/25/2017] [Indexed: 11/24/2022]
Abstract
In the canonical clock model, CLOCK:BMAL1-mediated transcriptional activation is feedback regulated by its repressors CRY and PER and, in association with other coregulators, ultimately generates oscillatory gene expression patterns. How CLOCK:BMAL1 interacts with coregulator(s) is not well understood. Here we report the crystal structures of the mouse CLOCK transactivating domain Exon19 in complex with CIPC, a potent circadian repressor that functions independently of CRY and PER. The Exon19:CIPC complex adopts a three-helical coiled-coil bundle conformation containing two Exon19 helices and one CIPC. Unique to Exon19:CIPC, three highly conserved polar residues, Asn341 of CIPC and Gln544 of the two Exon19 helices, are located at the mid-section of the coiled-coil bundle interior and form hydrogen bonds with each other. Combining results from protein database search, sequence analysis, and mutagenesis studies, we discovered for the first time that CLOCK Exon19:CIPC interaction is a conserved transcription regulatory mechanism among mammals, fish, flies, and other invertebrates.
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Affiliation(s)
- Zhiqiang Hou
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Lijing Su
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Jimin Pei
- Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Nick V Grishin
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Hong Zhang
- Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
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Talwar H, Bauerfeld C, Liu Y, Samavati L. The dataset describes: HIF-1 α expression and LPS mediated cytokine production in MKP-1 deficient bone marrow derived murine macrophages. Data Brief 2017; 14:56-61. [PMID: 28765831 PMCID: PMC5526519 DOI: 10.1016/j.dib.2017.07.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Revised: 07/11/2017] [Accepted: 07/18/2017] [Indexed: 02/07/2023] Open
Abstract
The data presented in this article are related to the research article entitled “MKP-1 negatively regulates LPS-mediated IL-1β production through p38 activation and HIF-1α expression” (Talwar et al., 2017) [1]. This data describes that LPS-mediated p38 and JNK phosphorylation is enhanced in MKP-1 deficient macrophages. HIF-1α expression and its nuclear accumulation are significantly increased in the nuclear extracts of MKP-1 deficient BMDMs. MKP-1 deficient BMDMs exhibited higher expression of the coactivator p300 of HIF-1α both at baseline and after LPS challenge. Inhibition of p38 MAP kinase decreased LPS mediated HIF-1α protein levels and its nuclear translocation in MKP-1 deficient BMDMs. Inhibition of p38 MAP kinase inhibited LPS induced pro-inflammatory cytokines including IL-1β, IL-6 and TNF-α.
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Affiliation(s)
- Harvinder Talwar
- Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Wayne State University School of Medicine and Detroit Medical Center, Detroit, MI 48201, United States
| | - Christian Bauerfeld
- Department of Pediatrics, Division of Critical Care, Wayne State University School of Medicine and ,Children's Hospital of Michigan Detroit, MI 48201, United States
| | - Yusen Liu
- Center for Perinatal Research, The Research Institute at Nationwide Children's Hospital, Columbus, OH 43205, United States
| | - Lobelia Samavati
- Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Wayne State University School of Medicine and Detroit Medical Center, Detroit, MI 48201, United States.,Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, MI 48201, United States
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Lee HJ, Jung YH, Choi GE, Ko SH, Lee SJ, Lee SH, Han HJ. BNIP3 induction by hypoxia stimulates FASN-dependent free fatty acid production enhancing therapeutic potential of umbilical cord blood-derived human mesenchymal stem cells. Redox Biol 2017; 13:426-443. [PMID: 28704726 PMCID: PMC5508529 DOI: 10.1016/j.redox.2017.07.004] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 06/29/2017] [Accepted: 07/03/2017] [Indexed: 02/08/2023] Open
Abstract
Mitophagy under hypoxia is an important factor for maintaining and regulating stem cell functions. We previously demonstrated that fatty acid synthase (FASN) induced by hypoxia is a critical lipid metabolic factor determining the therapeutic efficacy of umbilical cord blood-derived human mesenchymal stem cells (UCB-hMSCs). Therefore, we investigated the mechanism of a major mitophagy regulator controlling lipid metabolism and therapeutic potential of UCB-hMSCs. This study revealed that Bcl2/adenovirus E1B 19 kDa protein-interacting protein 3 (BNIP3)-dependent mitophagy is important for reducing mitochondrial reactive oxygen species accumulation, anti-apoptosis, and migration under hypoxia. And, BNIP3 expression was regulated by CREB binding protein-mediated transcriptional actions of HIF-1α and FOXO3. Silencing of BNIP3 suppressed free fatty acid (FFA) synthesis regulated by SREBP1/FASN pathway, which is involved in UCB-hMSC apoptosis via caspases cleavage and migration via cofilin-1-mediated F-actin reorganization in hypoxia. Moreover, reduced mouse skin wound-healing capacity of UCB-hMSC with hypoxia pretreatment by BNIP3 silencing was recovered by palmitic acid. Collectively, our findings suggest that BNIP3-mediated mitophagy under hypoxia leads to FASN-induced FFA synthesis, which is critical for therapeutic potential of UCB-hMSCs with hypoxia pretreatment. BNIP3 induction by hypoxia mainly controls mitophagy and mitochondrial ROS production in UCB-hMSCs. BNIP3 silencing impairs UCB-hMSC functions such as survival, migration and free fatty acid production under hypoxia. BNIP3 silencing suppresses SREBP1/FASN-mediated free fatty acid production via ROS regulation under hypoxia. BNIP3 silencing decreased skin wound healing potential of hypoxia-pretreated UCB-hMSCs. Palmitic acid addition recovers decreased therapeutic potential of UCB-hMSCs by BNIP3 silencing.
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Affiliation(s)
- Hyun Jik Lee
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, and BK21 PLUS Program for Creative Veterinary Science Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Young Hyun Jung
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, and BK21 PLUS Program for Creative Veterinary Science Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Gee Euhn Choi
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, and BK21 PLUS Program for Creative Veterinary Science Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - So Hee Ko
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, and BK21 PLUS Program for Creative Veterinary Science Research Center, Seoul National University, Seoul 08826, Republic of Korea
| | - Sei-Jung Lee
- Department of Pharmaceutical Engineering, Daegu Haany University, Gyeongsan 38610, Republic of Korea
| | - Sang Hun Lee
- Medical Science Research Institute, Soonchunhyang University Seoul Hospital, Seoul, Republic of Korea; Departments of Biochemistry, Soonchunhyang University College of Medicine, Cheonan 330-930, Republic of Korea
| | - Ho Jae Han
- Department of Veterinary Physiology, College of Veterinary Medicine, Research Institute for Veterinary Science, and BK21 PLUS Program for Creative Veterinary Science Research Center, Seoul National University, Seoul 08826, Republic of Korea.
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Characterizing the molecular architectures of chromatin-modifying complexes. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2017; 1865:1613-1622. [PMID: 28652207 DOI: 10.1016/j.bbapap.2017.06.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 06/09/2017] [Accepted: 06/21/2017] [Indexed: 11/23/2022]
Abstract
Eukaryotic cells package their genome in the form of a DNA-protein complex known as chromatin. This organization not only condenses the genome to fit within the confines of the nucleus, but also provides a platform for a cell to regulate accessibility to different gene sequences. The basic packaging element of chromatin is the nucleosome, which consists of 146 base pairs of DNA wrapped around histone proteins. One major means that a cell regulates chromatin structure is by depositing post-translational modifications on nucleosomal histone proteins, and thereby altering internucleosomal interactions and/or binding to different chromatin associated factors. These chromatin modifications are often catalyzed by multi-subunit enzyme complexes, whose large size, sophisticated composition, and inherent conformational flexibility pose significant technical challenges to their biochemical and structural characterization. Multiple structural approaches including nuclear magnetic resonance spectroscopy, X-ray crystallography, single-particle electron microscopy, and crosslinking coupled to mass spectrometry are often used synergistically to probe the overall architecture, subunit organization, and catalytic mechanisms of these macromolecular assemblies. In this review, we highlight several recent chromatin-modifying complexes studies that embodies this multipronged structural approach, and explore common themes amongst them. This article is part of a Special Issue entitled: Biophysics in Canada, edited by Lewis Kay, John Baenziger, Albert Berghuis and Peter Tieleman.
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105
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Sawyer N, Watkins AM, Arora PS. Protein Domain Mimics as Modulators of Protein-Protein Interactions. Acc Chem Res 2017; 50:1313-1322. [PMID: 28561588 DOI: 10.1021/acs.accounts.7b00130] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Protein-protein interactions (PPIs) are ubiquitous in biological systems and often misregulated in disease. As such, specific PPI modulators are desirable to unravel complex PPI pathways and expand the number of druggable targets available for therapeutic intervention. However, the large size and relative flatness of PPI interfaces make them challenging molecular targets. This Account describes our systematic approach using secondary and tertiary protein domain mimics (PDMs) to specifically modulate PPIs. Our strategy focuses on mimicry of regular secondary and tertiary structure elements from one of the PPI partners to inspire rational PDM design. We have compiled three databases (HIPPDB, SIPPDB, and DIPPDB) of secondary and tertiary structures at PPI interfaces to guide our designs and better understand the energetics of PPI secondary and tertiary structures. Our efforts have focused on three of the most common secondary and tertiary structures: α-helices, β-strands, and helix dimers (e.g., coiled coils). To mimic α-helices, we designed the hydrogen bond surrogate (HBS) as an isosteric PDM and the oligooxopiperazine helix mimetic (OHM) as a topographical PDM. The nucleus of the HBS approach is a peptide macrocycle in which the N-terminal i, i + 4 main-chain hydrogen bond is replaced with a covalent carbon-carbon bond. In mimicking a main-chain hydrogen bond, the HBS approach stabilizes the α-helical conformation while leaving all helical faces available for functionalization to tune binding affinity and specificity. The OHM approach, in contrast, envisions a tetrapeptide to mimic one face of a two-turn helix. We anticipated that placement of ethylene bridges between adjacent amides constrains the tetrapeptide backbone to mimic the i, i + 4, and i + 7 side chains on one face of an α-helix. For β-strands, we developed triazolamers, a topographical PDM where the peptide bonds are replaced by triazoles. The triazoles simultaneously stabilize the extended, zigzag conformation of β-strands and transform an otherwise ideal protease substrate into a stable molecule by replacement of the peptide bonds. We turned to a salt bridge surrogate (SBS) approach as a means for stabilizing very short helix dimers. As with the HBS approach, the SBS strategy replaces a noncovalent interaction with a covalent bond. Specifically, we used a bis-triazole linkage that mimics a salt bridge interaction to drive helix association and folding. Using this approach, we were able to stabilize helix dimers that are less than half of the length required to form a coiled coil from two independent strands. In addition to demonstrating the stabilization of desired structures, we have also shown that our designed PDMs specifically modulate target PPIs in vitro and in vivo. Examples of PPIs successfully targeted include HIF1α/p300, p53/MDM2, Bcl-xL/Bak, Ras/Sos, and HIV gp41. The PPI databases and designed PDMs created in these studies will aid development of a versatile set of molecules to probe complex PPI functions and, potentially, PPI-based therapeutics.
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Affiliation(s)
- Nicholas Sawyer
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Andrew M. Watkins
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Paramjit S. Arora
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
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106
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Zheng WS, He YX, Cui CY, Ouzhu L, Deji Q, Peng Y, Bai CJ, Duoji Z, Gongga L, Bian B, Baima K, Pan YY, Qu L, Kang M, Ciren Y, Baima Y, Guo W, Yang L, Zhang H, Zhang XM, Guo YB, Xu SH, Chen H, Zhao SG, Cai Y, Liu SM, Wu TY, Qi XB, Su B. EP300 contributes to high-altitude adaptation in Tibetans by regulating nitric oxide production. Zool Res 2017; 38:163-170. [PMID: 28585440 PMCID: PMC5460085 DOI: 10.24272/j.issn.2095-8137.2017.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The genetic adaptation of Tibetans to high altitude hypoxia likely involves a group of genes in the hypoxic pathway, as suggested by earlier studies. To test the adaptive role of the previously reported candidate gene EP300 (histone acetyltransferase p300), we conducted resequencing of a 108.9 kb gene region of EP300 in 80 unrelated Tibetans. The allele-frequency and haplotype-based neutrality tests detected signals of positive Darwinian selection on EP300 in Tibetans, with a group of variants showing allelic divergence between Tibetans and lowland reference populations, including Han Chinese, Europeans, and Africans. Functional prediction suggested the involvement of multiple EP300 variants in gene expression regulation. More importantly, genetic association tests in 226 Tibetans indicated significant correlation of the adaptive EP300 variants with blood nitric oxide (NO) concentration. Collectively, we propose that EP300 harbors adaptive variants in Tibetans, which might contribute to high-altitude adaptation through regulating NO production.
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Affiliation(s)
- Wang-Shan Zheng
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou Gansu 730070, China; State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Yao-Xi He
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China; Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming Yunnan 650204, China
| | - Chao-Ying Cui
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - Luobu Ouzhu
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - Quzong Deji
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - Yi Peng
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Cai-Juan Bai
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - Zhuoma Duoji
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - Lanzi Gongga
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - Ba Bian
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - Kangzhuo Baima
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - Yong-Yue Pan
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - la Qu
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - Min Kang
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - Yangji Ciren
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - Yangji Baima
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - Wei Guo
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - la Yang
- High Altitude Medical Research Center, School of Medicine, Tibetan University, Lhasa Tibet 850000, China
| | - Hui Zhang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Xiao-Ming Zhang
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Yong-Bo Guo
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou Gansu 730070, China; State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China
| | - Shu-Hua Xu
- Chinese Academy of Sciences Key Laboratory of Computational Biology, Max Planck Independent Research Group on Population Genomics, CAS-MPG Partner Institute for Computational Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China; School of Life Science and Technology, Shanghai Tech University, Shanghai 200031, China; Collaborative Innovation Center of Genetics and Development, Shanghai 200438, China
| | - Hua Chen
- Center for Computational Genomics, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing 100101, China
| | - Sheng-Guo Zhao
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou Gansu 730070, China
| | - Yuan Cai
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou Gansu 730070, China
| | - Shi-Ming Liu
- National Key Laboratory of High Altitude Medicine, High Altitude Medical Research Institute, Xining Qinghai 810012, China
| | - Tian-Yi Wu
- National Key Laboratory of High Altitude Medicine, High Altitude Medical Research Institute, Xining Qinghai 810012, China
| | - Xue-Bin Qi
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China.
| | - Bing Su
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming Yunnan 650223, China.
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107
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108
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Burslem GM, Kyle HF, Nelson A, Edwards TA, Wilson AJ. Hypoxia inducible factor (HIF) as a model for studying inhibition of protein-protein interactions. Chem Sci 2017; 8:4188-4202. [PMID: 28878873 PMCID: PMC5576430 DOI: 10.1039/c7sc00388a] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 03/31/2017] [Indexed: 12/21/2022] Open
Abstract
The state of the art in identifying protein–protein interaction inhibitors of hypoxia inducible factor – a promising target for anticancer drug design – is described.
The modulation of protein–protein interactions (PPIs) represents a major challenge in modern chemical biology. Current approaches (e.g. high-throughput screening, computer aided ligand design) are recognised as having limitations in terms of identification of hit matter. Considerable success has been achieved in terms of developing new approaches to PPI modulator discovery using the p53/hDM2 and Bcl-2 family of PPIs. However these important targets in oncology might be considered as “low-hanging-fruit”. Hypoxia inducible factor (HIF) is an emerging, but not yet fully validated target for cancer chemotherapy. Its role is to regulate the hypoxic response and it does so through a plethora of protein–protein interactions of varying topology, topography and complexity: its modulation represents an attractive approach to prevent development of new vasculature by hypoxic tumours.
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Affiliation(s)
- George M Burslem
- School of Chemistry , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , UK . .,Astbury Centre for Structural Molecular Biology , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , UK
| | - Hannah F Kyle
- Astbury Centre for Structural Molecular Biology , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , UK.,School of Molecular and Cellular Biology , Faculty of Biological Sciences , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , UK
| | - Adam Nelson
- School of Chemistry , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , UK . .,Astbury Centre for Structural Molecular Biology , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , UK
| | - Thomas A Edwards
- Astbury Centre for Structural Molecular Biology , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , UK.,School of Molecular and Cellular Biology , Faculty of Biological Sciences , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , UK
| | - Andrew J Wilson
- School of Chemistry , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , UK . .,Astbury Centre for Structural Molecular Biology , University of Leeds , Woodhouse Lane , Leeds LS2 9JT , UK
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109
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Berlow RB, Dyson HJ, Wright PE. Hypersensitive termination of the hypoxic response by a disordered protein switch. Nature 2017; 543:447-451. [PMID: 28273070 PMCID: PMC5375031 DOI: 10.1038/nature21705] [Citation(s) in RCA: 117] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Accepted: 02/14/2017] [Indexed: 12/18/2022]
Abstract
The cellular response to hypoxia is critical for cell survival and is fine-tuned to allow cells to recover from hypoxic stress and adapt to heterogeneous or fluctuating oxygen levels1,2. The hypoxic response is mediated by the α subunit of the transcription factor HIF-1 (HIF-1α)3, which interacts via its intrinsically disordered C-terminal transactivation domain with the TAZ1 (CH1) domain of the general transcriptional coactivators CBP and p300 to control transcription of critical adaptive genes4–6. One such gene is CITED2, a negative feedback regulator that attenuates HIF transcriptional activity by competing for TAZ1 binding through its own disordered transactivation domain7–9. Little is known about the molecular mechanism by which CITED2 displaces the tightly bound HIF-1α from their common cellular target. The HIF-1α and CITED2 transactivation domains bind to TAZ1 through helical motifs that flank a conserved LP(Q/E)L sequence that is essential for negative feedback regulation5,6,8,9. We show that CITED2 displaces HIF-1α by forming a transient ternary complex with TAZ1 and HIF-1α and competing for a shared binding site via its LPEL motif, thus promoting a conformational change in TAZ1 that increases the rate of HIF-1α dissociation. Through allosteric enhancement of HIF-1α release, CITED2 activates a highly responsive negative feedback circuit that rapidly and efficiently attenuates the hypoxic response, even at modest CITED2 concentrations. This hypersensitive regulatory switch is entirely dependent on the unique flexibility and binding properties of these intrinsically disordered proteins and exemplifies a likely common strategy used by the cell to respond rapidly to environmental signals.
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Affiliation(s)
- Rebecca B Berlow
- Department of Integrative Structural and Computational Biology and Skaggs Institute of Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
| | - H Jane Dyson
- Department of Integrative Structural and Computational Biology and Skaggs Institute of Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
| | - Peter E Wright
- Department of Integrative Structural and Computational Biology and Skaggs Institute of Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
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110
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Yang C, Wang W, Li GD, Zhong HJ, Dong ZZ, Wong CY, Kwong DWJ, Ma DL, Leung CH. Anticancer osmium complex inhibitors of the HIF-1α and p300 protein-protein interaction. Sci Rep 2017; 7:42860. [PMID: 28225008 PMCID: PMC5320473 DOI: 10.1038/srep42860] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 01/18/2017] [Indexed: 12/14/2022] Open
Abstract
The hypoxia inducible factor (HIF) pathway has been considered to be an attractive anti-cancer target. One strategy to inhibit HIF activity is through the disruption of the HIF-1α–p300 protein-protein interaction. We report herein the identification of an osmium(II) complex as the first metal-based inhibitor of the HIF-1α–p300 interaction. We evaluated the effect of complex 1 on HIF-1α signaling pathway in vitro and in cellulo by using the dual luciferase reporter assay, co-immunoprecipitation assay, and immunoblot assay. Complex 1 exhibited a dose-dependent inhibition of HRE-driven luciferase activity, with an IC50 value of 1.22 μM. Complex 1 interfered with the HIF-1α–p300 interaction as revealed by a dose-dependent reduction of p300 co-precipitated with HIF-1α as the concentration of complex 1 was increased. Complex 1 repressed the phosphorylation of SRC, AKT and STAT3, and had no discernible effect on the activity of NF-κB. We anticipate that complex 1 could be utilized as a promising scaffold for the further development of more potent HIF-1α inhibitors for anti-cancer treatment.
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Affiliation(s)
- Chao Yang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Wanhe Wang
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Guo-Dong Li
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Hai-Jing Zhong
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Zhen-Zhen Dong
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Chun-Yuen Wong
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Daniel W J Kwong
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Dik-Lung Ma
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Chung-Hang Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
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111
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Shelat NY, Parhi S, Ostermeier M. Development of a cancer-marker activated enzymatic switch from the herpes simplex virus thymidine kinase. Protein Eng Des Sel 2017; 30:95-103. [PMID: 27986921 PMCID: PMC6080848 DOI: 10.1093/protein/gzw067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 10/14/2016] [Accepted: 11/21/2016] [Indexed: 01/05/2023] Open
Abstract
Discovery of new cancer biomarkers and advances in targeted gene delivery mechanisms have made gene-directed enzyme prodrug therapy (GDEPT) an attractive method for treating cancer. Recent focus has been placed on increasing target specificity of gene delivery systems and reducing toxicity in non-cancer cells in order to make GDEPT viable. To help address this challenge, we have developed an enzymatic switch that confers higher prodrug toxicity in the presence of a cancer marker. The enzymatic switch was derived from the herpes simplex virus thymidine kinase (HSV-TK) fused to the CH1 domain of the p300 protein. The CH1 domain binds to the C-terminal transactivation domain (C-TAD) of the cancer marker hypoxia inducible factor 1α. The switch was developed using a directed evolution approach that evaluated a large library of HSV-TK/CH1 fusions using a negative selection for azidothymidine (AZT) toxicity and a positive selection for dT phosphorylation. The identified switch, dubbed TICKLE (Trigger-Induced Cell-Killing Lethal-Enzyme), confers a 4-fold increase in AZT toxicity in the presence of C-TAD. The broad substrate specificity exhibited by HSV-TK makes TICKLE an appealing prospect for testing in medical imaging and cancer therapy, while establishing a foundation for further engineering of nucleoside kinase protein switches.
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Affiliation(s)
- Nirav Y Shelat
- Chemical Biology Interface Graduate Program, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA
| | - Sidhartha Parhi
- Department of Chemical & Biomolecular Engineering, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA
| | - Marc Ostermeier
- Department of Chemical & Biomolecular Engineering, Johns Hopkins University, 3400 N. Charles St., Baltimore, MD 21218, USA
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Ding L, Yang M, Zhao T, Lv G. Roles of p300 and cyclic adenosine monophosphate response element binding protein in high glucose-induced hypoxia-inducible factor 1α inactivation under hypoxic conditions. J Diabetes Investig 2017; 8:277-285. [PMID: 27808477 PMCID: PMC5415468 DOI: 10.1111/jdi.12592] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 10/05/2016] [Accepted: 10/30/2016] [Indexed: 12/19/2022] Open
Abstract
Aims/Introduction Given the high prevalence of diabetes and burn injuries worldwide, it is essential to dissect the underlying mechanism of delayed burn wound healing in diabetes patients, especially the high glucose‐induced hypoxia‐inducible factor 1 (HIF‐1)‐mediated transcription defects. Materials and Methods Human umbilical vein endothelial cells were cultured with low or high concentrations of glucose. HIF‐1α‐induced vascular endothelial growth factor (VEGF) transcription was measured by luciferase assay. Immunofluorescence staining was carried out to visualize cyclic adenosine monophosphate response element binding protein (CREB) localization. Immunoprecipitation was carried out to characterize the association between HIF‐1α/p300/CREB. To test whether p300, CREB or p300+CREB co‐overexpression was sufficient to rescue the HIF‐1‐mediated transcription defect after high glucose exposure, p300, CREB or p300+CREB co‐overexpression were engineered, and VEGF expression was quantified. Finally, in vitro angiogenesis assay was carried out to test whether the high glucose‐induced angiogenesis defect is rescuable by p300 and CREB co‐overexpression. Results Chronic high glucose treatment resulted in impaired HIF‐1‐induced VEGF transcription and CREB exclusion from the nucleus. P300 or CREB overexpression alone cannot rescue high glucose‐induced HIF‐1α transcription defects. In contrast, co‐overexpression of p300 and CREB dramatically ameliorated high glucose‐induced impairment of HIF‐1‐mediated VEGF transcription, as well as in vitro angiogenesis. Finally, we showed that co‐overexpression of p300 and CREB rectifies the dissociation of HIF‐1α‐p300‐CREB protein complex in chronic high glucose‐treated cells. Conclusion Both p300 and CREB are required for the function integrity of HIF‐1α transcription machinery and subsequent angiogenesis, suggesting future studies to improve burn wound healing might be directed to optimization of the interaction between p300, CREB and HIF‐1α.
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Affiliation(s)
- Lingtao Ding
- Department of Burn and Plastic Surgery, The Third Affiliated Hospital of Nantong University, Wuxi, Jiangsu Province, China.,Department of Plastic Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Minlie Yang
- Department of Burn and Plastic Surgery, The Third Affiliated Hospital of Nantong University, Wuxi, Jiangsu Province, China
| | - Tianlan Zhao
- Department of Plastic Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu Province, China
| | - Guozhong Lv
- Department of Burn and Plastic Surgery, The Third Affiliated Hospital of Nantong University, Wuxi, Jiangsu Province, China
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Pullamsetti SS, Perros F, Chelladurai P, Yuan J, Stenmark K. Transcription factors, transcriptional coregulators, and epigenetic modulation in the control of pulmonary vascular cell phenotype: therapeutic implications for pulmonary hypertension (2015 Grover Conference series). Pulm Circ 2017; 6:448-464. [PMID: 28090287 DOI: 10.1086/688908] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Pulmonary hypertension (PH) is a complex and multifactorial disease involving genetic, epigenetic, and environmental factors. Numerous stimuli and pathological conditions facilitate severe vascular remodeling in PH by activation of a complex cascade of signaling pathways involving vascular cell proliferation, differentiation, and inflammation. Multiple signaling cascades modulate the activity of certain sequence-specific DNA-binding transcription factors (TFs) and coregulators that are critical for the transcriptional regulation of gene expression that facilitates PH-associated vascular cell phenotypes, as demonstrated by several studies summarized in this review. Past studies have largely focused on the role of the genetic component in the development of PH, while the presence of epigenetic alterations such as microRNAs, DNA methylation, histone levels, and histone deacetylases in PH is now also receiving increasing attention. Epigenetic regulation of chromatin structure is also recognized to influence gene expression in development or disease states. Therefore, a complete understanding of the mechanisms involved in altered gene expression in diseased cells is vital for the design of novel therapeutic strategies. Recent technological advances in DNA sequencing will provide a comprehensive improvement in our understanding of mechanisms involved in the development of PH. This review summarizes current concepts in TF and epigenetic control of cell phenotype in pulmonary vascular disease and discusses the current issues and possibilities in employing potential epigenetic or TF-based therapies for achieving complete reversal of PH.
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Affiliation(s)
- Soni S Pullamsetti
- Department of Lung Development and Remodeling, Max Planck Institute for Heart and Lung Research, member of the German Center for Lung Research (DZL), Bad Nauheim, Germany; Department of Internal Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), member of the DZL, Justus-Liebig University, Giessen, Germany
| | - Frédéric Perros
- Université Paris-Sud; and Institut national de la santé et de la recherche médicale (Inserm) Unité Mixte de Recherche (UMR_S) 999, Hôpital Marie Lannelongue, Le Plessis-Robinson, France
| | - Prakash Chelladurai
- Department of Lung Development and Remodeling, Max Planck Institute for Heart and Lung Research, member of the German Center for Lung Research (DZL), Bad Nauheim, Germany
| | - Jason Yuan
- University of Arizona, Tucson, Arizona, USA
| | - Kurt Stenmark
- Cardiovascular Pulmonary Research Laboratories, Department of Medicine and Pediatrics, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
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Martin AR, Ronco C, Demange L, Benhida R. Hypoxia inducible factor down-regulation, cancer and cancer stem cells (CSCs): ongoing success stories. MEDCHEMCOMM 2017; 8:21-52. [PMID: 30108689 PMCID: PMC6071925 DOI: 10.1039/c6md00432f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 10/10/2016] [Indexed: 12/12/2022]
Abstract
In cancers, hypoxia inducible factor 1 (HIF-1) is an over-expressed transcription factor, which regulates a large set of genes involved in tumour vascularization, metastases, and cancer stem cells (CSCs) formation and self-renewal. This protein has been identified as a relevant target in oncology and several HIF-1 modulators are now marketed or in advanced clinical trials. The purpose of this review is to summarize the advances in the understanding of its regulation and its inhibition, from the medicinal chemist point of view. To this end, we selected in the recent literature relevant examples of "hit" compounds, including small-sized organic molecules, pseudopeptides and nano-drugs, exhibiting in vitro and/or in vivo both anti-HIF-1 and anti-tumour activities. Whenever possible, a particular emphasis has been dedicated to compounds that selectively target CSCs.
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Affiliation(s)
- Anthony R Martin
- Université Côte d'Azur , CNRS , Institut de Chimie de Nice UMR 7272 - 06108 Nice , France . ; ; ; Tel: +33 4 92076143
| | - Cyril Ronco
- Université Côte d'Azur , CNRS , Institut de Chimie de Nice UMR 7272 - 06108 Nice , France . ; ; ; Tel: +33 4 92076143
| | - Luc Demange
- Université Côte d'Azur , CNRS , Institut de Chimie de Nice UMR 7272 - 06108 Nice , France . ; ; ; Tel: +33 4 92076143
- UFR des Sciences Pharmaceutiques , Université Paris Descartes , Sorbonne Paris Cité , 4 avenue de l'Observatoire , Paris Fr-75006 , France
- UFR Biomédicale des Saints Pères , 45 rue des Saints Pères , Paris Fr-75006 , France
| | - Rachid Benhida
- Université Côte d'Azur , CNRS , Institut de Chimie de Nice UMR 7272 - 06108 Nice , France . ; ; ; Tel: +33 4 92076143
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115
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Kim YJ, Kaluz S, Mehta A, Weinert E, Rivera S, Van Meir EG. Purifying Properly Folded Cysteine-rich, Zinc Finger Containing Recombinant Proteins for Structural Drug Targeting Studies: the CH1 Domain of p300 as a Case Example. Bio Protoc 2017; 7:e2537. [PMID: 28966947 DOI: 10.21769/bioprotoc.2537] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
The transcription factor Hypoxia-Inducible Factor (HIF) complexes with the coactivator p300, activating the hypoxia response pathway and allowing tumors to grow. The CH1 and CAD domains of each respective protein form the interface between p300 and HIF. Small molecule compounds are in development that target and inhibit HIF/p300 complex formation, with the goal of reducing tumor growth. High resolution NMR spectroscopy is necessary to study ligand interaction with p300-CH1, and purifying high quantities of properly folded p300-CH1 is needed for pursuing structural and biophysical studies. p300-CH1 has 3 zinc fingers and 9 cysteine residues, posing challenges associated with reagent compatibility and protein oxidation. A protocol has been developed to overcome such issues by incorporating zinc during expression and streamlining the purification time, resulting in a high yield of optimally folded protein (120 mg per 4 L expression media) that is suitable for structural NMR studies. The structural integrity of the final recombinant p300-CH1 has been verified to be optimal using onedimensional 1H NMR spectroscopy and circular dichroism. This protocol is applicable for the purification of other zinc finger containing proteins.
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Affiliation(s)
- Yong Joon Kim
- Department of Chemistry, Emory University, Atlanta, USA.,Laboratory of Molecular Neuro-Oncology, Departments of Neurosurgery and Hematology & Medical Oncology, School of Medicine and Winship Cancer Institute, Emory University, Atlanta, USA
| | - Stefan Kaluz
- Laboratory of Molecular Neuro-Oncology, Departments of Neurosurgery and Hematology & Medical Oncology, School of Medicine and Winship Cancer Institute, Emory University, Atlanta, USA
| | - Anil Mehta
- Department of Chemistry, Emory University, Atlanta, USA
| | - Emily Weinert
- Department of Chemistry, Emory University, Atlanta, USA
| | | | - Erwin G Van Meir
- Laboratory of Molecular Neuro-Oncology, Departments of Neurosurgery and Hematology & Medical Oncology, School of Medicine and Winship Cancer Institute, Emory University, Atlanta, USA
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116
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Development of 1-aryl-3-furanyl/thienyl-imidazopyridine templates for inhibitors against hypoxia inducible factor (HIF)-1 transcriptional activity. Bioorg Med Chem Lett 2016; 26:5887-5890. [DOI: 10.1016/j.bmcl.2016.11.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 11/02/2016] [Accepted: 11/04/2016] [Indexed: 01/23/2023]
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117
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Tong Q, Zhu Y, Galaske JW, Kosmacek EA, Chatterjee A, Dickinson BC, Oberley-Deegan RE. MnTE-2-PyP modulates thiol oxidation in a hydrogen peroxide-mediated manner in a human prostate cancer cell. Free Radic Biol Med 2016; 101:32-43. [PMID: 27671770 PMCID: PMC5486925 DOI: 10.1016/j.freeradbiomed.2016.09.019] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 09/20/2016] [Accepted: 09/23/2016] [Indexed: 01/11/2023]
Abstract
To improve the treatment of advanced prostate cancer, the development of effective and innovative antitumor agents is needed. Our previous work demonstrated that the ROS (reactive oxygen species) scavenger, MnTE-2-PyP, inhibited human prostate cancer growth and also inhibited prostate cancer migration and invasion. We showed that MnTE-2-PyP treatment altered the affinity of the histone acetyltransferase enzyme, p300, to bind to DNA. We speculate that this may be one mechanism by which MnTE-2-PyP inhibits prostate cancer progression. Specifically, MnTE-2-PyP decreased p300/HIF-1/CREB complex (p300/hypoxia-inducible factor-1/cAMP response element-binding protein) binding to a specific hypoxia-response element (HRE) motif within the plasminogen activator inhibitor-1 (PAI-1) gene promoter region, and consequently, repressed PAI-1 expression. However, it remains unclear how MnTE-2-PyP reduces p300 complex binding affinity to the promoter region of specific genes. In this study, we found that overexpression of Cu/ZnSOD (superoxide dismutase 1, SOD1) significantly suppressed PAI-1 gene expression and p300 complex binding to the promoter region of PAI-1 gene, just as was observed in cells treated with MnTE-2-PyP. Furthermore, catalase (CAT) overexpression rescued the inhibition of PAI-1 expression and p300 binding by MnTE-2-PyP. Taken together, the above findings suggest that hydrogen peroxide (H2O2) is likely the mediator through which MnTE-2-PyP inhibits the PAI-1 expression and p300 complex binding in PC3 cells. To confirm this, we measured the production of H2O2 following overexpression of SOD1 or catalase with MnTE-2-PyP treatment in the presence or absence of radiation. We found that MnTE-2-PyP increased the intracellular steady-state levels of H2O2 and increased nuclear H2O2 levels. As expected, catalase overexpression significantly decreased the levels of intracellular H2O2 induced by MnTE-2-PyP. We then determined if this increased H2O2 production could result in oxidized protein thiol groups. In the presence of MnTE-2-PyP, there was a significant increase in oxidized thiols in PC3 cell lysates and this was reversed with catalase overexpression. Specifically, we showed that p300 was oxidized after MnTE-2-PyP treatment, indicating that MnTE-2-PyP is creating a more oxidizing environment and this is altering the oxidation state of p300 thiol residues. Our data provide an in depth mechanism by which MnTE-2-PyP regulates gene transcription through induced H2O2 mediated oxidation of particular proteins, supporting an important role for MnTE-2-PyP as an effective and innovative antitumor agent to enhance treatment outcomes in prostate cancer radiotherapy.
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Affiliation(s)
- Qiang Tong
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA; Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Yuxiang Zhu
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Joseph W Galaske
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Elizabeth A Kosmacek
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Arpita Chatterjee
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - Bryan C Dickinson
- Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA
| | - Rebecca E Oberley-Deegan
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198, USA.
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118
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Zambelli B, Uversky VN, Ciurli S. Nickel impact on human health: An intrinsic disorder perspective. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2016; 1864:1714-1731. [DOI: 10.1016/j.bbapap.2016.09.008] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 08/31/2016] [Accepted: 09/14/2016] [Indexed: 01/26/2023]
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119
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Wu D, Rastinejad F. Structural characterization of mammalian bHLH-PAS transcription factors. Curr Opin Struct Biol 2016; 43:1-9. [PMID: 27721191 DOI: 10.1016/j.sbi.2016.09.011] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 09/06/2016] [Accepted: 09/21/2016] [Indexed: 11/28/2022]
Abstract
The mammalian basic helix-loop-helix-PER-ARNT-SIM (bHLH-PAS) transcription factors share common architectural features that include a bHLH DNA-binding domain and tandemly positioned PAS domains. The sixteen members of this family include the hypoxia-inducible factors (HIF-1α and HIF-2α), ARNT (also known as HIF-1β), CLOCK and BMAL1. Most bHLH-PAS proteins have been genetically linked to variety of diseases in humans, including cancers, metabolic syndromes and psychiatric conditions. To function as transcription factors, the bHLH-PAS proteins must form heterodimeric complexes. Recent crystallographic studies of HIF-α-ARNT and CLOCK-BMAL1 complexes have unveiled the organization of their multi-domain bHLH-PAS-A-PAS-B segments, revealing how these architectures can give rise to unique patterns of heterodimerization. As our structural understanding becomes better integrated with ligand-discovery and target gene identification, a more comprehensive picture of their architectural and functional properties will emerge.
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Affiliation(s)
- Dalei Wu
- Integrative Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL 32827, USA; State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Qingdao, 266237, China
| | - Fraydoon Rastinejad
- Integrative Metabolism Program, Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL 32827, USA.
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120
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Eo Y, Shim M, Phuong TNT, Hoa PP, Ahn DR, Ahn HC. NMR-based Fragment Screening of Inhibitors Against p300 CH1 and HIF-1α CTAD Interaction. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.10907] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Yumi Eo
- Department of Pharmacy; Dongguk University; Seoul 10324 Republic of Korea
| | - Myungbo Shim
- Department of Pharmacy; Dongguk University; Seoul 10324 Republic of Korea
| | | | - Phuong Pham Hoa
- Department of Pharmacy; Dongguk University; Seoul 10324 Republic of Korea
| | - Dae-Ro Ahn
- The Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology; Seoul 02792 Republic of Korea
| | - Hee-Chul Ahn
- Department of Pharmacy; Dongguk University; Seoul 10324 Republic of Korea
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121
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Chan MC, Ilott NE, Schödel J, Sims D, Tumber A, Lippl K, Mole DR, Pugh CW, Ratcliffe PJ, Ponting CP, Schofield CJ. Tuning the Transcriptional Response to Hypoxia by Inhibiting Hypoxia-inducible Factor (HIF) Prolyl and Asparaginyl Hydroxylases. J Biol Chem 2016; 291:20661-73. [PMID: 27502280 PMCID: PMC5034057 DOI: 10.1074/jbc.m116.749291] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 08/05/2016] [Indexed: 01/08/2023] Open
Abstract
The hypoxia-inducible factor (HIF) system orchestrates cellular responses to hypoxia in animals. HIF is an α/β-heterodimeric transcription factor that regulates the expression of hundreds of genes in a tissue context-dependent manner. The major hypoxia-sensing component of the HIF system involves oxygen-dependent catalysis by the HIF hydroxylases; in humans there are three HIF prolyl hydroxylases (PHD1-3) and an asparaginyl hydroxylase (factor-inhibiting HIF (FIH)). PHD catalysis regulates HIFα levels, and FIH catalysis regulates HIF activity. How differences in HIFα hydroxylation status relate to variations in the induction of specific HIF target gene transcription is unknown. We report studies using small molecule HIF hydroxylase inhibitors that investigate the extent to which HIF target gene expression is induced by PHD or FIH inhibition. The results reveal substantial differences in the role of prolyl and asparaginyl hydroxylation in regulating hypoxia-responsive genes in cells. PHD inhibitors with different structural scaffolds behave similarly. Under the tested conditions, a broad-spectrum 2-oxoglutarate dioxygenase inhibitor is a better mimic of the overall transcriptional response to hypoxia than the selective PHD inhibitors, consistent with an important role for FIH in the hypoxic transcriptional response. Indeed, combined application of selective PHD and FIH inhibitors resulted in the transcriptional induction of a subset of genes not fully responsive to PHD inhibition alone. Thus, for the therapeutic regulation of HIF target genes, it is important to consider both PHD and FIH activity, and in the case of some sets of target genes, simultaneous inhibition of the PHDs and FIH catalysis may be preferable.
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Affiliation(s)
- Mun Chiang Chan
- From the Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, the Centre for Cellular and Molecular Physiology, University of Oxford, Oxford OX3 7BN
| | - Nicholas E Ilott
- the Computational Genomics Analysis and Training Programme, MRC Functional Genomics Unit Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford OX1 3PT, and
| | - Johannes Schödel
- the Centre for Cellular and Molecular Physiology, University of Oxford, Oxford OX3 7BN
| | - David Sims
- the Computational Genomics Analysis and Training Programme, MRC Functional Genomics Unit Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford OX1 3PT, and
| | - Anthony Tumber
- the Target Discovery Institute, University of Oxford, Oxford OX3 7FZ, United Kingdom
| | - Kerstin Lippl
- From the Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA
| | - David R Mole
- the Centre for Cellular and Molecular Physiology, University of Oxford, Oxford OX3 7BN
| | - Christopher W Pugh
- the Centre for Cellular and Molecular Physiology, University of Oxford, Oxford OX3 7BN
| | - Peter J Ratcliffe
- the Centre for Cellular and Molecular Physiology, University of Oxford, Oxford OX3 7BN
| | - Chris P Ponting
- the Computational Genomics Analysis and Training Programme, MRC Functional Genomics Unit Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford OX1 3PT, and
| | - Christopher J Schofield
- From the Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA,
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122
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Fergelot P, Van Belzen M, Van Gils J, Afenjar A, Armour CM, Arveiler B, Beets L, Burglen L, Busa T, Collet M, Deforges J, de Vries BBA, Dominguez Garrido E, Dorison N, Dupont J, Francannet C, Garciá-Minaúr S, Gabau Vila E, Gebre-Medhin S, Gener Querol B, Geneviève D, Gérard M, Gervasini CG, Goldenberg A, Josifova D, Lachlan K, Maas S, Maranda B, Moilanen JS, Nordgren A, Parent P, Rankin J, Reardon W, Rio M, Roume J, Shaw A, Smigiel R, Sojo A, Solomon B, Stembalska A, Stumpel C, Suarez F, Terhal P, Thomas S, Touraine R, Verloes A, Vincent-Delorme C, Wincent J, Peters DJM, Bartsch O, Larizza L, Lacombe D, Hennekam RC. Phenotype and genotype in 52 patients with Rubinstein-Taybi syndrome caused by EP300 mutations. Am J Med Genet A 2016; 170:3069-3082. [PMID: 27648933 DOI: 10.1002/ajmg.a.37940] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 08/07/2016] [Indexed: 01/01/2023]
Abstract
Rubinstein-Taybi syndrome (RSTS) is a developmental disorder characterized by a typical face and distal limbs abnormalities, intellectual disability, and a vast number of other features. Two genes are known to cause RSTS, CREBBP in 60% and EP300 in 8-10% of clinically diagnosed cases. Both paralogs act in chromatin remodeling and encode for transcriptional co-activators interacting with >400 proteins. Up to now 26 individuals with an EP300 mutation have been published. Here, we describe the phenotype and genotype of 42 unpublished RSTS patients carrying EP300 mutations and intragenic deletions and offer an update on another 10 patients. We compare the data to 308 individuals with CREBBP mutations. We demonstrate that EP300 mutations cause a phenotype that typically resembles the classical RSTS phenotype due to CREBBP mutations to a great extent, although most facial signs are less marked with the exception of a low-hanging columella. The limb anomalies are more similar to those in CREBBP mutated individuals except for angulation of thumbs and halluces which is very uncommon in EP300 mutated individuals. The intellectual disability is variable but typically less marked whereas the microcephaly is more common. All types of mutations occur but truncating mutations and small rearrangements are most common (86%). Missense mutations in the HAT domain are associated with a classical RSTS phenotype but otherwise no genotype-phenotype correlation is detected. Pre-eclampsia occurs in 12/52 mothers of EP300 mutated individuals versus in 2/59 mothers of CREBBP mutated individuals, making pregnancy with an EP300 mutated fetus the strongest known predictor for pre-eclampsia. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Patricia Fergelot
- Department of Genetics, and INSERM U1211, University Hospital of Bordeaux, Bordeaux, France
| | - Martine Van Belzen
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - Julien Van Gils
- Department of Genetics, University Hospital Center, Bordeaux, France
| | - Alexandra Afenjar
- Unité de Génétique, Hospital Armand Trousseau-La Roche-Guyon, AP-HP, Paris, France
| | - Christine M Armour
- Regional Genetics Unit, Children's Hospital of Eastern Ontario, Ottawa, Canada
| | - Benoit Arveiler
- Department of Genetics, and INSERM U1211, University Hospital of Bordeaux, Bordeaux, France
| | - Lex Beets
- Department of Pediatrics, Academic Medical Center, Amsterdam, The Netherlands
| | - Lydie Burglen
- Unité de Génétique, Hospital Armand Trousseau-La Roche-Guyon, AP-HP, Paris, France
| | - Tiffany Busa
- Unité de Génétique Clinique, Hospital La Timone, AP-HM, Marseille, France
| | - Marie Collet
- Département de Génétique, Hospital Necker-Enfants Malades, AP-HP, Paris, France
| | - Julie Deforges
- Department of Genetics, University Hospital Center, Bordeaux, France
| | - Bert B A de Vries
- Department of Human Genetics, Donders Centre for Neuroscience, Radboud University Medical Center, Nijmegen, The Netherlands
| | | | - Nathalie Dorison
- Departement de Neuropédiatrie, Institut Jérôme Lejeune, Paris, France
| | - Juliette Dupont
- Serviço de Genética, Departamento de Pediatria, Hospital de Santa Maria, CHLN, Lisboa, Portugal
| | | | - Sixto Garciá-Minaúr
- Institute of Medical and Molecular Genetics, University Hospital La Paz, Madrid, Spain
| | - Elisabeth Gabau Vila
- Genetics Clinic, Hospital de Sabadell, Corporació Sanitària Parc Taulí, Sabadell, Spain
| | - Samuel Gebre-Medhin
- Division of Clinical Genetics, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | | | - David Geneviève
- Service de Génétique Médicale, Hospital Arnaud de Villeneuve, CHU Montpellier, Montpellier, France
| | - Marion Gérard
- Service de Génétique, Hospital Clémenceau, CHU de Caen, Caen, France
| | | | - Alice Goldenberg
- Unité de Génétique Clinique, Hospital Charles Nicolle, CHU Rouen, Rouen, France
| | - Dragana Josifova
- Department of Medical Genetics, Guy's and St Thomas Hospital, London, United Kingdom
| | - Katherine Lachlan
- Wessex Clinical Genetics Service, Princess Anne Hospital, Southampton, United Kingdom
| | - Saskia Maas
- Department of Pediatrics, Academic Medical Center, Amsterdam, The Netherlands
| | - Bruno Maranda
- Laboratoire de Médecine Génétique, CHUQ Pavillon CHUL, Saint Foy, Canada
| | - Jukka S Moilanen
- PEDEGO Research Unit, and Medical Research Center Oulu, Department of Clinical Genetics, University of Oulu, Oulu University Hospital, Oulu, Finland
| | - Ann Nordgren
- Department of Molecular Medicine and Surgery, and Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Philippe Parent
- Département de Pédiatrie et Génétique Médicale, Hospital Augustin Morvan, CHU Brest, Brest, France
| | - Julia Rankin
- Department of Clinical Genetics, Royal Devon and Exeter NHS Foundation Trust, Exeter, United Kingdom
| | | | - Marlène Rio
- Unité de Génétique Clinique, Hospital La Timone, AP-HM, Marseille, France
| | - Joëlle Roume
- Unité de Génétique Médicale, CHI Poissy, Saint Germain en Laye, France
| | - Adam Shaw
- Department of Medical Genetics, Guy's and St Thomas Hospital, London, United Kingdom
| | - Robert Smigiel
- Department of Paediatrics, Wroclaw Medical University, Wroclaw, Poland
| | | | - Benjamin Solomon
- Division of Medical Genomics, Inova Translational Medical Institute, Falls Church
| | | | - Constance Stumpel
- Department of Clinical Genetics and School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Francisco Suarez
- Service de Génétique, Hospital Virgen de la Salud, Toledo, Spain
| | - Paulien Terhal
- Department of Medical Genetics, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Simon Thomas
- Wessex Regional Genetics Laboratory, Salisbury District Hospital, Salisbury, United Kingdom
| | - Renaud Touraine
- Service de Génétique Clinique et Moléculaire, CHU Hôpital-Nord, Saint-Etienne, France
| | - Alain Verloes
- Département de Génétique, CHU Robert Debré, AP-HP, Paris, France
| | | | - Josephine Wincent
- Department of Molecular Medicine and Surgery, and Center for Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Dorien J M Peters
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - Oliver Bartsch
- Institute of Human Genetics, University Medical Centre, Mainz, Germany
| | - Lidia Larizza
- Department of Health Sciences, University of Milan, Milan, Italy
| | - Didier Lacombe
- Department of Genetics, and INSERM U1211, University Hospital of Bordeaux, Bordeaux, France
| | - Raoul C Hennekam
- Department of Pediatrics, Academic Medical Center, Amsterdam, The Netherlands
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123
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Gopalakrishnan R, Frolov AI, Knerr L, Drury WJ, Valeur E. Therapeutic Potential of Foldamers: From Chemical Biology Tools To Drug Candidates? J Med Chem 2016; 59:9599-9621. [PMID: 27362955 DOI: 10.1021/acs.jmedchem.6b00376] [Citation(s) in RCA: 122] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Over the past decade, foldamers have progressively emerged as useful architectures to mimic secondary structures of proteins. Peptidic foldamers, consisting of various amino acid based backbones, have been the most studied from a therapeutic perspective, while polyaromatic foldamers have barely evolved from their nascency and remain perplexing for medicinal chemists due to their poor drug-like nature. Despite these limitations, this compound class may still offer opportunities to study challenging targets or provide chemical biology tools. The potential of foldamer drug candidates reaching the clinic is still a stretch. Nevertheless, advances in the field have demonstrated their potential for the discovery of next generation therapeutics. In this perspective, the current knowledge of foldamers is reviewed in a drug discovery context. Recent advances in the early phases of drug discovery including hit finding, target validation, and optimization and molecular modeling are discussed. In addition, challenges and focus areas are debated and gaps highlighted.
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Affiliation(s)
- Ranganath Gopalakrishnan
- Cardiovascular and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca , Pepparedsleden 1, Mölndal, 431 83, Sweden.,AstraZeneca MPI Satellite Unit, Department of Chemical Biology, Max Planck Institute of Molecular Physiology , Dortmund 44202, Germany
| | - Andrey I Frolov
- Cardiovascular and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca , Pepparedsleden 1, Mölndal, 431 83, Sweden
| | - Laurent Knerr
- Cardiovascular and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca , Pepparedsleden 1, Mölndal, 431 83, Sweden
| | - William J Drury
- Cardiovascular and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca , Pepparedsleden 1, Mölndal, 431 83, Sweden
| | - Eric Valeur
- Cardiovascular and Metabolic Diseases, Innovative Medicines and Early Development Biotech Unit, AstraZeneca , Pepparedsleden 1, Mölndal, 431 83, Sweden
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124
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Genome-wide analysis of DNA methylation during antagonism of DMOG to MnCl2-induced cytotoxicity in the mouse substantia nigra. Sci Rep 2016; 6:28933. [PMID: 27380887 PMCID: PMC4933877 DOI: 10.1038/srep28933] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Accepted: 06/13/2016] [Indexed: 01/09/2023] Open
Abstract
Exposure to excessive manganese (Mn) causes manganism, a progressive neurodegenerative disorder similar to idiopathic Parkinson’s disease (IPD). The detailed mechanisms of Mn neurotoxicity in nerve cells, especially in dopaminergic neurons are not yet fully understood. Meanwhile, it is unknown whether there exists a potential antagonist or effective drug for treating neuron damage in manganism. In the present study, we report the discovery of an HIF prolyl-hydroxylase inhibitor, DMOG [N-(2-Methoxy-2-oxoacetyl) glycine methyl ester], that can partially inhibit manganese toxicity not only in the neuroblastoma cell line SH-SY5Y in vitro but also in a mouse model in vivo. A genome-wide methylation DNA analysis was performed using microarray hybridization. Intriguingly, DNA methylation in the promoter region of 226 genes was found to be regulated by MnCl2, while the methylation effects of MnCl2 could be restored with combinatorial DMOG treatment. Furthermore, we found that genes with converted promoter methylation during DMOG antagonism were associated across several categories of molecular function, including mitochondria integrity maintain, cell cycle and DNA damage response, and ion transportation. Collectively, our results serve as the basis of a mechanism analysis of neuron damage in manganism and may supply possible gene targets for clinical therapy.
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125
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Kyle HF, Wickson KF, Stott J, Burslem GM, Breeze AL, Tiede C, Tomlinson DC, Warriner SL, Nelson A, Wilson AJ, Edwards TA. Exploration of the HIF-1α/p300 interface using peptide and Adhiron phage display technologies. MOLECULAR BIOSYSTEMS 2016; 11:2738-49. [PMID: 26135796 DOI: 10.1039/c5mb00284b] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The HIF-1α/p300 protein-protein interaction plays a key role in tumor metabolism and thus represents a high value target for anticancer drug-development. Although several studies have identified inhibitor candidates using rationale design, more detailed understanding of the interaction and binding interface is necessary to inform development of superior inhibitors. In this work, we report a detailed biophysical analysis of the native interaction with both peptide and Adhiron phage display experiments to identify novel binding motifs and binding regions of the surface of p300 to inform future inhibitor design.
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Affiliation(s)
- Hannah F Kyle
- Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK.
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126
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Wei J, Yang Y, Li Y, Mo X, Guo X, Zhang X, Xu X, Jiang Z, You Q. Synthesis and evaluation of N-(benzofuran-5-yl)aromaticsulfonamide derivatives as novel HIF-1 inhibitors that possess anti-angiogenic potential. Bioorg Med Chem 2016; 25:1737-1746. [PMID: 28209257 DOI: 10.1016/j.bmc.2016.06.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 06/08/2016] [Accepted: 06/11/2016] [Indexed: 11/19/2022]
Abstract
Hypoxia-inducible factor-1 (HIF-1) as a key mediator in tumor metastasis, angiogenesis, and poor patient prognosis has been recognized as an important cancer drug target. A novel series of N-(benzofuran-5-yl)aromaticsulfonamide derivatives were synthesized and evaluated as HIF-1 inhibitor. Among these compounds, 7q exhibited specific inhibitory effects on HIF-1 by downregulating the expression of HIF-1α under hypoxic conditions. It inhibited the HIF-1 transcriptional activity (IC50=12.5±0.7μM) and secretion of VEGF (IC50=18.8μM) in MCF-7 cells. Meanwhile, it also significantly suppressed hypoxia-induced migration of HUVEC cells in nontoxic concentrations. Additionally, tube formation assay demonstrated its anti-angiogenesis activity. Finally, the in vivo study indicated that compound 7q could retard angiogenesis in CAM model. These findings supported the HIF-1 inhibitory effect and anti-angiogenic potential of this class of compounds as HIF-1 inhibitor.
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Affiliation(s)
- Jinlian Wei
- State Key Laboratory of Natural Medicines, and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Yingrui Yang
- State Key Laboratory of Natural Medicines, and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Yali Li
- State Key Laboratory of Natural Medicines, and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Xiaofei Mo
- State Key Laboratory of Natural Medicines, and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Xiaoke Guo
- State Key Laboratory of Natural Medicines, and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Xiaojin Zhang
- State Key Laboratory of Natural Medicines, and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China; Department of Organic Chemistry, School of Science, China Pharmaceutical University, Nanjing 210009, China
| | - Xiaoli Xu
- State Key Laboratory of Natural Medicines, and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Zhengyu Jiang
- State Key Laboratory of Natural Medicines, and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China
| | - Qidong You
- State Key Laboratory of Natural Medicines, and Jiangsu Key Laboratory of Drug Design and Optimization, China Pharmaceutical University, Nanjing 210009, China; Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, China.
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127
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Grandjean G, de Jong PR, James B, Koh MY, Lemos R, Kingston J, Aleshin A, Bankston LA, Miller CP, Cho EJ, Edupuganti R, Devkota A, Stancu G, Liddington RC, Dalby K, Powis G. Definition of a Novel Feed-Forward Mechanism for Glycolysis-HIF1α Signaling in Hypoxic Tumors Highlights Aldolase A as a Therapeutic Target. Cancer Res 2016; 76:4259-4269. [PMID: 27261507 DOI: 10.1158/0008-5472.can-16-0401] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 05/06/2016] [Indexed: 11/16/2022]
Abstract
The hypoxia-inducible transcription factor HIF1α drives expression of many glycolytic enzymes. Here, we show that hypoxic glycolysis, in turn, increases HIF1α transcriptional activity and stimulates tumor growth, revealing a novel feed-forward mechanism of glycolysis-HIF1α signaling. Negative regulation of HIF1α by AMPK1 is bypassed in hypoxic cells, due to ATP elevation by increased glycolysis, thereby preventing phosphorylation and inactivation of the HIF1α transcriptional coactivator p300. Notably, of the HIF1α-activated glycolytic enzymes we evaluated by gene silencing, aldolase A (ALDOA) blockade produced the most robust decrease in glycolysis, HIF-1 activity, and cancer cell proliferation. Furthermore, either RNAi-mediated silencing of ALDOA or systemic treatment with a specific small-molecule inhibitor of aldolase A was sufficient to increase overall survival in a xenograft model of metastatic breast cancer. In establishing a novel glycolysis-HIF-1α feed-forward mechanism in hypoxic tumor cells, our results also provide a preclinical rationale to develop aldolase A inhibitors as a generalized strategy to treat intractable hypoxic cancer cells found widely in most solid tumors. Cancer Res; 76(14); 4259-69. ©2016 AACR.
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Affiliation(s)
- Geoffrey Grandjean
- Department of Experimental Therapeutics, University of Texas MD Anderson Cancer Center. Houston, TX.,Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Petrus R de Jong
- Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Brian James
- Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Mei Yee Koh
- Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Robert Lemos
- Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - John Kingston
- Department of Experimental Therapeutics, University of Texas MD Anderson Cancer Center. Houston, TX
| | - Alexander Aleshin
- Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Laurie A Bankston
- Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Claudia P Miller
- Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Eun Jeong Cho
- Department of Medicinal Chemistry, College of Pharmacy, University of Texas at Austin, Austin, TX
| | - Ramakrishna Edupuganti
- Department of Medicinal Chemistry, College of Pharmacy, University of Texas at Austin, Austin, TX
| | - Ashwini Devkota
- Department of Medicinal Chemistry, College of Pharmacy, University of Texas at Austin, Austin, TX
| | - Gabriel Stancu
- Department of Medicinal Chemistry, College of Pharmacy, University of Texas at Austin, Austin, TX
| | - Robert C Liddington
- Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
| | - Kevin Dalby
- Department of Medicinal Chemistry, College of Pharmacy, University of Texas at Austin, Austin, TX
| | - Garth Powis
- Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA
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128
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Schoepflin ZR, Shapiro IM, Risbud MV. Class I and IIa HDACs Mediate HIF-1α Stability Through PHD2-Dependent Mechanism, While HDAC6, a Class IIb Member, Promotes HIF-1α Transcriptional Activity in Nucleus Pulposus Cells of the Intervertebral Disc. J Bone Miner Res 2016; 31:1287-99. [PMID: 26765925 PMCID: PMC4891304 DOI: 10.1002/jbmr.2787] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 12/29/2015] [Accepted: 01/08/2016] [Indexed: 12/17/2022]
Abstract
The objective of this study was to determine the role of histone deacetylases (HDACs) in regulating HIF-1α protein stability and activity in nucleus pulposus (NP) cells. Treatment of NP cells with pan-HDAC inhibitor TSA resulted in decreased HIF-1α levels under both normoxia and hypoxia in a dose-dependent fashion. TSA-mediated HIF-1α degradation was rescued by concomitant inhibition of not only the 26S proteasome but also PHD2 function. Moreover, TSA treatment of PHD2(-/-) cells had little effect on HIF-1α levels, supporting the notion that inhibition of PHD2 function by HDACs contributed to HIF-1α stabilization. Surprisingly, class-specific HDAC inhibitors did not affect HIF-1α protein stability, indicating that multiple HDACs controlled HIF-1α stability by regulating HIF-1α-PHD2 interaction in NP cells. Interestingly, lower-dose TSA that did not affect HIF-1α stability decreased its activity and target gene expression. Likewise, rescue of TSA-mediated HIF-1α protein degradation by blocking proteasomal or PHD activity did not restore HIF-1 activity, suggesting that HDACs independently regulate HIF-1α stability and activity. Noteworthy, selective inhibition of HDAC6 and not of class I and IIa HDACs decreased HIF-1-mediated transcription under hypoxia to a similar extent as lower-dose TSA, contrasting the reported role of HDAC6 as a transcriptional repressor in other cell types. Moreover, HDAC6 inhibition completely blocked TSA effects on HIF-1 activity. HDAC6 associated with and deacetylated HSP90, an important cofactor for HIF-1 function in NP cells, and HDAC6 inhibition decreased p300 transactivation in NP cells. Taken together, these results suggest that although multiple class I and class IIa HDACs control HIF-1 stability, HDAC6, a class IIb HDAC, is a novel mediator of HIF-1 activity in NP cells possibly through promoting action of critical HIF-1 cofactors. © 2016 American Society for Bone and Mineral Research.
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Affiliation(s)
- Zachary R Schoepflin
- Department of Orthopaedic Surgery and Graduate Program in Cell and Developmental Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Irving M Shapiro
- Department of Orthopaedic Surgery and Graduate Program in Cell and Developmental Biology, Thomas Jefferson University, Philadelphia, PA, USA
| | - Makarand V Risbud
- Department of Orthopaedic Surgery and Graduate Program in Cell and Developmental Biology, Thomas Jefferson University, Philadelphia, PA, USA
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129
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Abstract
Activation of hypoxia pathways is both associated with and contributes to an aggressive phenotype across multiple types of solid cancers. The regulation of gene transcription by hypoxia-inducible factor (HIF) is a key element in this response. HIF directly upregulates the expression of many hundreds of protein-coding genes, which act to both improve oxygen delivery and to reduce oxygen demand. However, it is now becoming apparent that many classes of noncoding RNAs are also regulated by hypoxia, with several (e.g. micro RNAs, long noncoding RNAs and antisense RNAs) under direct transcriptional regulation by HIF. These hypoxia-regulated, noncoding RNAs may act as effectors of the indirect response to HIF by acting on specific coding transcripts or by affecting generic RNA-processing pathways. In addition, noncoding RNAs may also act as modulators of the HIF pathway, either by integrating other physiological responses or, in the case of HIF-regulated, noncoding RNAs, by providing negative or positive feedback and feedforward loops that affect upstream or downstream components of the HIF cascade. These hypoxia-regulated, noncoding transcripts play important roles in the aggressive hypoxic phenotype observed in cancer.
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130
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Molecular response and association analysis of Megalobrama amblycephala fih-1 with hypoxia. Mol Genet Genomics 2016; 291:1615-24. [PMID: 27112926 DOI: 10.1007/s00438-016-1208-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Accepted: 04/13/2016] [Indexed: 12/19/2022]
Abstract
Hypoxia is one of the most important environmental factors which affect fish growth, development and survival, but regulation mechanisms of hypoxia in fish remain unclear. Therefore, to further understand molecular functions of factor inhibiting HIF-1 (Fih-1), an essential hypoxia sensor, the full-length cDNA of fih-1 was cloned from Megalobrama amblycephala, a hypoxia-sensitive cyprinid fish. The deduced amino acid sequence showed high homology with that of other vertebrates, and all structural and functional domains were highly conserved. The mRNA level in different tissues and developmental stages indicated that M. amblycephala fih-1 expression was higher in liver and muscle, followed by gill, intestine and spleen. During embryogenesis, the fih-1 mRNA was highly expressed in the early embryonic development, then decreased to a very low level, and maintained a relative high level of expression after hatching. In most tissues, the fih-1 mRNA was down-regulated at 2 h but up-regulated at 4 h after hypoxia treatment. In addition, the promoter sequence of M. amblycephala fih-1 was obtained using thermal asymmetric interlaced PCR. Three single nucleotide polymorphism (SNP) sites were found in the cDNA and promoter sequences, and identified significant association with hypoxia trait by correlation analysis in hypoxia-sensitive group and hypoxia-tolerant group. These results demonstrated that M. amblycephala fih-1 plays important roles in embryo development and hypoxia response, which will contribute to systematic understanding of the molecular mechanisms of fish in response to hypoxia, and provide help for fish genetic breeding with hypoxia-tolerant strains or breeds.
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131
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Wilkins SE, Abboud MI, Hancock RL, Schofield CJ. Targeting Protein-Protein Interactions in the HIF System. ChemMedChem 2016; 11:773-86. [PMID: 26997519 PMCID: PMC4848768 DOI: 10.1002/cmdc.201600012] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 02/24/2016] [Indexed: 12/18/2022]
Abstract
Animals respond to chronic hypoxia by increasing the levels of a transcription factor known as the hypoxia-inducible factor (HIF). HIF upregulates multiple genes, the products of which work to ameliorate the effects of limited oxygen at cellular and systemic levels. Hypoxia sensing by the HIF system involves hydroxylase-catalysed post-translational modifications of the HIF α-subunits, which 1) signal for degradation of HIF-α and 2) limit binding of HIF to transcriptional coactivator proteins. Because the hypoxic response is relevant to multiple disease states, therapeutic manipulation of the HIF-mediated response has considerable medicinal potential. In addition to modulation of catalysis by the HIF hydroxylases, the HIF system manifests other possibilities for therapeutic intervention involving protein-protein and protein-nucleic acid interactions. Recent advances in our understanding of the structural biology and biochemistry of the HIF system are facilitating medicinal chemistry efforts. Herein we give an overview of the HIF system, focusing on structural knowledge of protein-protein interactions and how this might be used to modulate the hypoxic response for therapeutic benefit.
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Affiliation(s)
- Sarah E Wilkins
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Martine I Abboud
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Rebecca L Hancock
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Christopher J Schofield
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK.
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132
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Burslem GM, Kyle HF, Prabhakaran P, Breeze AL, Edwards TA, Warriner SL, Nelson A, Wilson AJ. Synthesis of highly functionalized oligobenzamide proteomimetic foldamers by late stage introduction of sensitive groups. Org Biomol Chem 2016; 14:3782-6. [PMID: 27005701 PMCID: PMC4839272 DOI: 10.1039/c6ob00078a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 03/14/2016] [Indexed: 12/26/2022]
Abstract
α-Helix proteomimetics represent an emerging class of ligands that can be used to inhibit an array of helix mediated protein-protein interactions. Within this class of inhibitor, aromatic oligobenzamide foldamers have been widely and successfully used. This manuscript describes alternative syntheses of these compounds that can be used to access mimetics that are challenging to synthesize using previously described methodologies, permitting access to compounds functionalized with multiple sensitive side chains and accelerated library assembly through late stage derivatisation.
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Affiliation(s)
- George M Burslem
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK. and Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK
| | - Hannah F Kyle
- Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK and School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK
| | - Panchami Prabhakaran
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK. and Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK
| | - Alexander L Breeze
- Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK and School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK and Discovery Sciences, AstraZeneca R&D, Alderley Park, Cheshire, SK10 4TG, UK
| | - Thomas A Edwards
- Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK and School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK
| | - Stuart L Warriner
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK. and Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK
| | - Adam Nelson
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK. and Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK
| | - Andrew J Wilson
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK. and Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK
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133
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Burslem GM, Kyle HF, Breeze AL, Edwards TA, Nelson A, Warriner SL, Wilson AJ. Towards "bionic" proteins: replacement of continuous sequences from HIF-1α with proteomimetics to create functional p300 binding HIF-1α mimics. Chem Commun (Camb) 2016; 52:5421-4. [PMID: 27009828 PMCID: PMC4843846 DOI: 10.1039/c6cc01812b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 03/11/2016] [Indexed: 12/15/2022]
Abstract
Using the HIF-1α transcription factor as a model, this manuscript illustrates how an extended sequence of α-amino acids in a polypeptide can be replaced with a non-natural topographical mimic of an α-helix comprised from an aromatic oligoamide. The resultant hybrid is capable of reproducing the molecular recognition profile of the p300 binding sequence of HIF-1α from which it is derived.
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Affiliation(s)
- George M Burslem
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK and Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK.
| | - Hannah F Kyle
- Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK. and School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK
| | - Alexander L Breeze
- Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK. and School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK and Discovery Sciences, AstraZeneca R&D, Alderley Park, Cheshire, SK10 4TG, UK
| | - Thomas A Edwards
- Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK. and School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK
| | - Adam Nelson
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK and Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK.
| | - Stuart L Warriner
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK and Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK.
| | - Andrew J Wilson
- School of Chemistry, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK and Astbury Centre for Structural Molecular Biology, University of Leeds, Woodhouse Lane, Leeds, LS29JT, UK.
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134
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Recognition of the disordered p53 transactivation domain by the transcriptional adapter zinc finger domains of CREB-binding protein. Proc Natl Acad Sci U S A 2016; 113:E1853-62. [PMID: 26976603 DOI: 10.1073/pnas.1602487113] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
An important component of the activity of p53 as a tumor suppressor is its interaction with the transcriptional coactivators cyclic-AMP response element-binding protein (CREB)-binding protein (CBP) and p300, which activate transcription of p53-regulated stress response genes and stabilize p53 against ubiquitin-mediated degradation. The highest affinity interactions are between the intrinsically disordered N-terminal transactivation domain (TAD) of p53 and the TAZ1 and TAZ2 domains of CBP/p300. The NMR spectra of simple binary complexes of the TAZ1 and TAZ2 domains with the p53TAD suffer from exchange broadening, but innovations in construct design and isotopic labeling have enabled us to obtain high-resolution structures using fusion proteins, uniformly labeled in the case of the TAZ2-p53TAD fusion and segmentally labeled through transintein splicing for the TAZ1-p53TAD fusion. The p53TAD is bipartite, with two interaction motifs, termed AD1 and AD2, which fold to form short amphipathic helices upon binding to TAZ1 and TAZ2 whereas intervening regions of the p53TAD remain flexible. Both the AD1 and AD2 motifs bind to hydrophobic surfaces of the TAZ domains, with AD2 making more extensive hydrophobic contacts consistent with its greater contribution to the binding affinity. Binding of AD1 and AD2 is synergistic, and structural studies performed with isolated motifs can be misleading. The present structures of the full-length p53TAD complexes demonstrate the versatility of the interactions available to an intrinsically disordered domain containing bipartite interaction motifs and provide valuable insights into the structural basis of the affinity changes that occur upon stress-related posttranslational modification.
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135
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Liu K, Min XL, Peng J, Yang K, Yang L, Zhang XM. The Changes of HIF-1α and VEGF Expression After TACE in Patients With Hepatocellular Carcinoma. J Clin Med Res 2016; 8:297-302. [PMID: 26985249 PMCID: PMC4780492 DOI: 10.14740/jocmr2496w] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/16/2016] [Indexed: 02/05/2023] Open
Abstract
As a common malignant tumor, hepatocellular carcinoma (HCC) has a high prevalence and is a serious threat to human health. The surgical resection rate of HCC is low, and the prognosis is poor. Although transarterial chemoembolization (TACE) is the main treatment for HCC patients who are not candidates for surgical resection, it is not considered a curative procedure. For HCC, poor TACE efficacy or TACE failure may be related to tumor angiogenesis of the residual disease. Among the many regulatory factors in tumor angiogenesis, hypoxia-inducible factor-1α (HIF-1α) and vascular endothelial growth factor (VEGF) play vital roles in this process. In this paper, we conducted a review of the dynamic change and relevance of HIF-1α and VEGF levels after TACE of HCC patients.
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Affiliation(s)
- Kang Liu
- Department of Pain Management, Xianyang Hospital, Yan'an University, Xianyang, Shanxi 712000, China; Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, China
| | - Xu-Li Min
- Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, China
| | - Juan Peng
- Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, China
| | - Ke Yang
- Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, China
| | - Lin Yang
- Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, China
| | - Xiao-Ming Zhang
- Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, China
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136
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Dyson HJ, Wright PE. Role of Intrinsic Protein Disorder in the Function and Interactions of the Transcriptional Coactivators CREB-binding Protein (CBP) and p300. J Biol Chem 2016; 291:6714-22. [PMID: 26851278 DOI: 10.1074/jbc.r115.692020] [Citation(s) in RCA: 216] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The transcriptional coactivators CREB-binding protein (CBP) and p300 undergo a particularly rich set of interactions with disordered and partly ordered partners, as a part of their ubiquitous role in facilitating transcription of genes. CBP and p300 contain a number of small structured domains that provide scaffolds for the interaction of disordered transactivation domains from a wide variety of partners, including p53, hypoxia-inducible factor 1α (HIF-1α), NF-κB, and STAT proteins, and are the targets for the interactions of disordered viral proteins that compete with cellular factors to disrupt signaling and subvert the cell cycle. The functional diversity of the CBP/p300 interactome provides an excellent example of the power of intrinsic disorder to facilitate the complexity of living systems.
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Affiliation(s)
- H Jane Dyson
- From the Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, California 92037-1000
| | - Peter E Wright
- From the Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, California 92037-1000
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137
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Mansouri K, Mostafie A, Rezazadeh D, Shahlaei M, Modarressi MH. New function of TSGA10gene in angiogenesis and tumor metastasis: a response to a challengeable paradox. Hum Mol Genet 2016; 25:233-244. [DOI: 10.1093/hmg/ddv461] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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138
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FIH Regulates Cellular Metabolism through Hydroxylation of the Deubiquitinase OTUB1. PLoS Biol 2016; 14:e1002347. [PMID: 26752685 PMCID: PMC4709136 DOI: 10.1371/journal.pbio.1002347] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 12/07/2015] [Indexed: 12/30/2022] Open
Abstract
The asparagine hydroxylase, factor inhibiting HIF (FIH), confers oxygen-dependence upon the hypoxia-inducible factor (HIF), a master regulator of the cellular adaptive response to hypoxia. Studies investigating whether asparagine hydroxylation is a general regulatory oxygen-dependent modification have identified multiple non-HIF targets for FIH. However, the functional consequences of this outside of the HIF pathway remain unclear. Here, we demonstrate that the deubiquitinase ovarian tumor domain containing ubiquitin aldehyde binding protein 1 (OTUB1) is a substrate for hydroxylation by FIH on N22. Mutation of N22 leads to a profound change in the interaction of OTUB1 with proteins important in cellular metabolism. Furthermore, in cultured cells, overexpression of N22A mutant OTUB1 impairs cellular metabolic processes when compared to wild type. Based on these data, we hypothesize that OTUB1 is a target for functional hydroxylation by FIH. Additionally, we propose that our results provide new insight into the regulation of cellular energy metabolism during hypoxic stress and the potential for targeting hydroxylases for therapeutic benefit. The oxygen-dependent asparagine hydroxylase FIH regulates the transcription factor HIF during the cellular response to hypoxia. This study suggests that FIH may also contribute to the hypoxia response by affecting cellular metabolism via altered deubiquitinase targeting. Hypoxia is a commonly encountered physiologic and pathophysiologic stress to which mammalian cells have evolved an effective adaptive response. This response is governed by a transcription factor termed the hypoxia-inducible factor (HIF). The mechanisms linking the cellular sensing of oxygen levels to HIF activation have been elucidated and involve oxygen-dependent hydroxylation of HIF on proline and asparagine residues by a family of hydroxylases. A key question that remains unclear is the extent to which oxygen-dependent hydroxylation occurs as a functional post-translational modification outside of the HIF pathway. This is key to developing our understanding of whether hydroxylation is a general regulatory modification or one which has specifically evolved for the regulation of HIF. Here, we demonstrate that the deubiquitinase ovarian tumor domain containing ubiquitin aldehyde binding protein 1 (OTUB1) is a target for functional hydroxylation by the FIH hydroxylase. Hydroxylation of OTUB1 by FIH on asparagine residue N22 results in a restriction in its interactome, leading us to hypothesize a possible role for hydroxylation in substrate targeting. Of interest, interactions of OTUB1 with a number of proteins involved in metabolism are altered upon removal of the hydroxylation site—implicating OTUB1 as a possible link between oxygen sensing and the regulation of metabolism.
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139
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Pharmacological targeting of the HIF hydroxylases--A new field in medicine development. Mol Aspects Med 2016; 47-48:54-75. [PMID: 26791432 DOI: 10.1016/j.mam.2016.01.001] [Citation(s) in RCA: 110] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 12/11/2015] [Accepted: 01/04/2016] [Indexed: 12/13/2022]
Abstract
In human cells oxygen levels are 'sensed' by a set of ferrous iron and 2-oxoglutarate dependent dioxygenases. These enzymes regulate a broad range of cellular and systemic responses to hypoxia by catalysing the post-translational hydroxylation of specific residues in the alpha subunits of hypoxia inducible factor (HIF) transcriptional complexes. The HIF hydroxylases are now the subject of pharmaceutical targeting by small molecule inhibitors that aim to activate or augment the endogenous HIF transcriptional response for the treatment of anaemia and other hypoxic human diseases. Here we consider the rationale for this therapeutic strategy from the biochemical, biological and medical perspectives. We outline structural and mechanistic considerations that are relevant to the design of HIF hydroxylase inhibitors, including likely determinants of specificity, and review published reports on their activity in pre-clinical models and clinical trials.
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140
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Zheng F, Kasper LH, Bedford DC, Lerach S, Teubner BJW, Brindle PK. Mutation of the CH1 Domain in the Histone Acetyltransferase CREBBP Results in Autism-Relevant Behaviors in Mice. PLoS One 2016; 11:e0146366. [PMID: 26730956 PMCID: PMC4701386 DOI: 10.1371/journal.pone.0146366] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 12/16/2015] [Indexed: 11/18/2022] Open
Abstract
Autism spectrum disorders (ASDs) are a group of neurodevelopmental afflictions characterized by repetitive behaviors, deficits in social interaction, and impaired communication skills. For most ASD patients, the underlying causes are unknown. Genetic mutations have been identified in about 25 percent of ASD cases, including mutations in epigenetic regulators, suggesting that dysregulated chromatin or DNA function is a critical component of ASD. Mutations in the histone acetyltransferase CREB binding protein (CBP, CREBBP) cause Rubinstein-Taybi Syndrome (RTS), a developmental disorder that includes ASD-like symptoms. Recently, genomic studies involving large numbers of ASD patient families have theoretically modeled CBP and its paralog p300 (EP300) as critical hubs in ASD-associated protein and gene interaction networks, and have identified de novo missense mutations in highly conserved residues of the CBP acetyltransferase and CH1 domains. Here we provide animal model evidence that supports this notion that CBP and its CH1 domain are relevant to autism. We show that mice with a deletion mutation in the CBP CH1 (TAZ1) domain (CBPΔCH1/ΔCH1) have an RTS-like phenotype that includes ASD-relevant repetitive behaviors, hyperactivity, social interaction deficits, motor dysfunction, impaired recognition memory, and abnormal synaptic plasticity. Our results therefore indicate that loss of CBP CH1 domain function contributes to RTS, and possibly ASD, and that this domain plays an essential role in normal motor function, cognition and social behavior. Although the key physiological functions affected by ASD-associated mutation of epigenetic regulators have been enigmatic, our findings are consistent with theoretical models involving CBP and p300 in ASD, and with a causative role for recently described ASD-associated CBP mutations.
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Affiliation(s)
- Fei Zheng
- Department of Biochemistry, St Jude Children’s Research Hospital, Memphis, TN 38105, United States of America
- * E-mail: (FZ); (PB)
| | - Lawryn H. Kasper
- Department of Biochemistry, St Jude Children’s Research Hospital, Memphis, TN 38105, United States of America
| | - David C. Bedford
- Department of Biochemistry, St Jude Children’s Research Hospital, Memphis, TN 38105, United States of America
| | - Stephanie Lerach
- Department of Biochemistry, St Jude Children’s Research Hospital, Memphis, TN 38105, United States of America
| | - Brett J. W. Teubner
- Department of Developmental Neurobiology, St Jude Children’s Research Hospital, Memphis, TN 38105, United States of America
| | - Paul K. Brindle
- Department of Biochemistry, St Jude Children’s Research Hospital, Memphis, TN 38105, United States of America
- * E-mail: (FZ); (PB)
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141
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Abstract
Reversible acetylation was initially described as an epigenetic mechanism regulating DNA accessibility. Since then, this process has emerged as a controller of histone and nonhistone acetylation that integrates key physiological processes such as metabolism, circadian rhythm and cell cycle, along with gene regulation in various organisms. The widespread and reversible nature of acetylation also revitalized interest in the mechanisms that regulate lysine acetyltransferases (KATs) and deacetylases (KDACs) in health and disease. Changes in protein or histone acetylation are especially relevant for many common diseases including obesity, diabetes mellitus, neurodegenerative diseases and cancer, as well as for some rare diseases such as mitochondrial diseases and lipodystrophies. In this Review, we examine the role of reversible acetylation in metabolic control and how changes in levels of metabolites or cofactors, including nicotinamide adenine dinucleotide, nicotinamide, coenzyme A, acetyl coenzyme A, zinc and butyrate and/or β-hydroxybutyrate, directly alter KAT or KDAC activity to link energy status to adaptive cellular and organismal homeostasis.
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Affiliation(s)
- Keir J Menzies
- Interdisciplinary School of Health Sciences, University of Ottawa, 501 Smyth Road, Ottawa, ON K1H 8L6, Canada
| | - Hongbo Zhang
- Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne, Station 15, 1015 Lausanne, Switzerland
| | - Elena Katsyuba
- Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne, Station 15, 1015 Lausanne, Switzerland
| | - Johan Auwerx
- Laboratory of Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne, Station 15, 1015 Lausanne, Switzerland
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142
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143
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Tarhonskaya H, Hardy AP, Howe EA, Loik ND, Kramer HB, McCullagh JSO, Schofield CJ, Flashman E. Kinetic Investigations of the Role of Factor Inhibiting Hypoxia-inducible Factor (FIH) as an Oxygen Sensor. J Biol Chem 2015; 290:19726-42. [PMID: 26112411 PMCID: PMC4528135 DOI: 10.1074/jbc.m115.653014] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2015] [Revised: 06/24/2015] [Indexed: 01/23/2023] Open
Abstract
The hypoxia-inducible factor (HIF) hydroxylases regulate hypoxia sensing in animals. In humans, they comprise three prolyl hydroxylases (PHD1-3 or EGLN1-3) and factor inhibiting HIF (FIH). FIH is an asparaginyl hydroxylase catalyzing post-translational modification of HIF-α, resulting in reduction of HIF-mediated transcription. Like the PHDs, FIH is proposed to have a hypoxia-sensing role in cells, enabling responses to changes in cellular O2 availability. PHD2, the most important human PHD isoform, is proposed to be biochemically/kinetically suited as a hypoxia sensor due to its relatively high sensitivity to changes in O2 concentration and slow reaction with O2. To ascertain whether these parameters are conserved among the HIF hydroxylases, we compared the reactions of FIH and PHD2 with O2. Consistent with previous reports, we found lower Km(app)(O2) values for FIH than for PHD2 with all HIF-derived substrates. Under pre-steady-state conditions, the O2-initiated FIH reaction is significantly faster than that of PHD2. We then investigated the kinetics with respect to O2 of the FIH reaction with ankyrin repeat domain (ARD) substrates. FIH has lower Km(app)(O2) values for the tested ARDs than HIF-α substrates, and pre-steady-state O2-initiated reactions were faster with ARDs than with HIF-α substrates. The results correlate with cellular studies showing that FIH is active at lower O2 concentrations than the PHDs and suggest that competition between HIF-α and ARDs for FIH is likely to be biologically relevant, particularly in hypoxic conditions. The overall results are consistent with the proposal that the kinetic properties of individual oxygenases reflect their biological capacity to act as hypoxia sensors.
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Affiliation(s)
- Hanna Tarhonskaya
- From the Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom and
| | - Adam P Hardy
- From the Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom and
| | - Emily A Howe
- From the Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom and
| | - Nikita D Loik
- From the Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom and
| | - Holger B Kramer
- the OXION Proteomics Facility, Department of Physiology, Anatomy, and Genetics, University of Oxford, South Parks Road, Oxford OX1 3QX, United Kingdom
| | - James S O McCullagh
- From the Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom and
| | - Christopher J Schofield
- From the Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom and
| | - Emily Flashman
- From the Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom and
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144
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Fahs S, Patil-Sen Y, Snape TJ. Foldamers as Anticancer Therapeutics: Targeting Protein-Protein Interactions and the Cell Membrane. Chembiochem 2015; 16:1840-1853. [DOI: 10.1002/cbic.201500188] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Indexed: 01/10/2023]
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145
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Berlow RB, Dyson HJ, Wright PE. Functional advantages of dynamic protein disorder. FEBS Lett 2015; 589:2433-40. [PMID: 26073260 DOI: 10.1016/j.febslet.2015.06.003] [Citation(s) in RCA: 138] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 05/29/2015] [Accepted: 06/01/2015] [Indexed: 11/19/2022]
Abstract
Intrinsically disordered proteins participate in many important cellular regulatory processes. The absence of a well-defined structure in the free state of a disordered domain, and even on occasion when it is bound to physiological partners, is fundamental to its function. Disordered domains are frequently the location of multiple sites for post-translational modification, the key element of metabolic control in the cell. When a disordered domain folds upon binding to a partner, the resulting complex buries a far greater surface area than in an interaction of comparably-sized folded proteins, thus maximizing specificity at modest protein size. Disorder also maintains accessibility of sites for post-translational modification. Because of their inherent plasticity, disordered domains frequently adopt entirely different structures when bound to different partners, increasing the repertoire of available interactions without the necessity for expression of many different proteins. This feature also adds to the faithfulness of cellular regulation, as the availability of a given disordered domain depends on competition between various partners relevant to different cellular processes.
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Affiliation(s)
- Rebecca B Berlow
- Department of Integrative Structural and Computational Biology and Skaggs Institute of Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - H Jane Dyson
- Department of Integrative Structural and Computational Biology and Skaggs Institute of Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Peter E Wright
- Department of Integrative Structural and Computational Biology and Skaggs Institute of Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.
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146
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Cross Talk between Proliferative, Angiogenic, and Cellular Mechanisms Orchestred by HIF-1α in Psoriasis. Mediators Inflamm 2015; 2015:607363. [PMID: 26136626 PMCID: PMC4475568 DOI: 10.1155/2015/607363] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 05/21/2015] [Indexed: 02/08/2023] Open
Abstract
Psoriasis is a chronic inflammatory skin disease where the altered regulation in angiogenesis, inflammation, and proliferation of keratinocytes are the possible causes of the disease, and the transcription factor “hypoxia-inducible factor 1-alpha” (HIF-1α) is involved in the homeostasis of these three biological phenomena. In this review, the role of HIF-1α in the cross talk between the cytokines and cells of the immunological system involved in the pathogenesis of psoriasis is discussed.
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147
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Michael AK, Harvey SL, Sammons PJ, Anderson AP, Kopalle HM, Banham AH, Partch CL. Cancer/Testis Antigen PASD1 Silences the Circadian Clock. Mol Cell 2015; 58:743-54. [PMID: 25936801 PMCID: PMC4458219 DOI: 10.1016/j.molcel.2015.03.031] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2014] [Revised: 02/13/2015] [Accepted: 03/25/2015] [Indexed: 01/06/2023]
Abstract
The circadian clock orchestrates global changes in transcriptional regulation on a daily basis via the bHLH-PAS transcription factor CLOCK:BMAL1. Pathways driven by other bHLH-PAS transcription factors have a homologous repressor that modulates activity on a tissue-specific basis, but none have been identified for CLOCK:BMAL1. We show here that the cancer/testis antigen PASD1 fulfills this role to suppress circadian rhythms. PASD1 is evolutionarily related to CLOCK and interacts with the CLOCK:BMAL1 complex to repress transcriptional activation. Expression of PASD1 is restricted to germline tissues in healthy individuals but can be induced in cells of somatic origin upon oncogenic transformation. Reducing PASD1 in human cancer cells significantly increases the amplitude of transcriptional oscillations to generate more robust circadian rhythms. Our results describe a function for a germline-specific protein in regulation of the circadian clock and provide a molecular link from oncogenic transformation to suppression of circadian rhythms.
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Affiliation(s)
- Alicia K Michael
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Stacy L Harvey
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Patrick J Sammons
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Amanda P Anderson
- Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, Oxford OX3 9DU, UK
| | - Hema M Kopalle
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, CA 95064, USA
| | - Alison H Banham
- Nuffield Division of Clinical Laboratory Sciences, Radcliffe Department of Medicine, University of Oxford, Oxford OX3 9DU, UK
| | - Carrie L Partch
- Department of Chemistry and Biochemistry, University of California, Santa Cruz, Santa Cruz, CA 95064, USA; Center for Circadian Biology, University of California, San Diego, San Diego, CA 92093, USA.
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148
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Chan STS, Patel PR, Ransom TR, Henrich CJ, McKee TC, Goey AKL, Cook KM, Figg WD, McMahon JB, Schnermann MJ, Gustafson KR. Structural Elucidation and Synthesis of Eudistidine A: An Unusual Polycyclic Marine Alkaloid that Blocks Interaction of the Protein Binding Domains of p300 and HIF-1α. J Am Chem Soc 2015; 137:5569-75. [PMID: 25892103 PMCID: PMC6318789 DOI: 10.1021/jacs.5b02156] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Low oxygen environments are a hallmark of solid tumors, and transcription of many hypoxia-responsive genes needed for survival under these conditions is regulated by the transcription factor HIF-1 (hypoxia-inducible factor 1). Activation of HIF-1 requires binding of its α-subunit (HIF-1α) to the transcriptional coactivator protein p300. Inhibition of the p300/HIF-1α interaction can suppress HIF-1 activity. A screen for inhibitors of the protein binding domains of p300 (CH1) and HIF-1α (C-TAD) identified an extract of the marine ascidian Eudistoma sp. as active. Novel heterocyclic alkaloids eudistidines A (1) and B (2) were isolated from the extract, and their structures assigned by spectroscopic analyses. They contain an unprecedented tetracyclic core composed of two pyrimidine rings fused with an imidazole ring. Eudistidine A (1) was synthesized in a concise four-step sequence featuring a condensation/cyclization reaction cascade between 4-(2-aminophenyl)pyrimidin-2-amine (3) and 4-methoxy-phenylglyoxal (4), while eudistidine B (2) was synthesized in a similar fashion with glyoxylic acid (5) in place of 4. Naturally occurring eudistidine A (1) effectively inhibited CH1/C-TAD binding with an IC50 of 75 μM, and synthetic 1 had similar activity. The eudistidine A (1) scaffold, which can be synthesized in a concise, scalable manner, may provide potential therapeutic lead compounds or molecular probes to study p300/HIF-1α interactions and the role these proteins play in tumor response to low oxygen conditions. The unique structural scaffolds and functional group arrays often found in natural products make these secondary metabolites a rich source of new compounds that can disrupt critical protein-protein binding events.
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Affiliation(s)
- Susanna T. S. Chan
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702-1201, United States
| | - Paresma R. Patel
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702-1201, United States
- National Center for Advancing Translational Sciences, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Tanya R. Ransom
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702-1201, United States
| | - Curtis J. Henrich
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702-1201, United States
- Basic Science Program, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702-1201, United States
| | - Tawnya C. McKee
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702-1201, United States
| | - Andrew K. L. Goey
- Genitourinary Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892, United States
| | - Kristina M. Cook
- Genitourinary Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892, United States
| | - William D. Figg
- Genitourinary Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland 20892, United States
| | - James B. McMahon
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702-1201, United States
| | - Martin J. Schnermann
- Chemical Biology Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702-1201, United States
| | - Kirk R. Gustafson
- Molecular Targets Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, Maryland 21702-1201, United States
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149
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Jayatunga MKP, Thompson S, McKee TC, Chan MC, Reece KM, Hardy AP, Sekirnik R, Seden PT, Cook KM, McMahon JB, Figg WD, Schofield CJ, Hamilton AD. Inhibition of the HIF1α-p300 interaction by quinone- and indandione-mediated ejection of structural Zn(II). Eur J Med Chem 2015; 94:509-16. [PMID: 25023609 PMCID: PMC4277744 DOI: 10.1016/j.ejmech.2014.06.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Accepted: 06/03/2014] [Indexed: 12/22/2022]
Abstract
Protein-protein interactions between the hypoxia inducible factor (HIF) and the transcriptional coactivators p300/CBP are potential cancer targets due to their role in the hypoxic response. A natural product based screen led to the identification of indandione and benzoquinone derivatives that reduce the tight interaction between a HIF-1α fragment and the CH1 domain of p300. The indandione derivatives were shown to fragment to give ninhydrin, which was identified as the active species. Both the naphthoquinones and ninhydrin were observed to induce Zn(II) ejection from p300 and the catalytic domain of the histone demethylase KDM4A. Together with previous reports on the effects of related compounds on HIF-1α and other systems, the results suggest that care should be taken in interpreting biological results obtained with highly electrophilic/thiol modifying compounds.
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Affiliation(s)
- Madura K P Jayatunga
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Sam Thompson
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom.
| | - Tawnya C McKee
- Center for Cancer Research, Molecular Targets Laboratory, Frederick National Laboratory Cancer Research, Frederick, MD 21702, USA
| | - Mun Chiang Chan
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Kelie M Reece
- NCI, Mol. Pharmacol. Sect., Med. Oncol. Branch, Ctr. Canc. Res., NIH, Bldg. 10, Room 5A01, 9000 Rockville Pike, Bethesda, MD 20892, USA
| | - Adam P Hardy
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Rok Sekirnik
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Peter T Seden
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Kristina M Cook
- NCI, Mol. Pharmacol. Sect., Med. Oncol. Branch, Ctr. Canc. Res., NIH, Bldg. 10, Room 5A01, 9000 Rockville Pike, Bethesda, MD 20892, USA
| | - James B McMahon
- Center for Cancer Research, Molecular Targets Laboratory, Frederick National Laboratory Cancer Research, Frederick, MD 21702, USA
| | - William D Figg
- NCI, Mol. Pharmacol. Sect., Med. Oncol. Branch, Ctr. Canc. Res., NIH, Bldg. 10, Room 5A01, 9000 Rockville Pike, Bethesda, MD 20892, USA.
| | - Christopher J Schofield
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom
| | - Andrew D Hamilton
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford OX1 3TA, United Kingdom.
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Wang H, Huang C, Chen N, Zhu K, Chen B, Wang W, Wang H. Molecular characterization and mRNA expression of HIF-prolyl hydroxylase-2 (phd2) in hypoxia-sensing pathways from Megalobrama amblycephala. Comp Biochem Physiol B Biochem Mol Biol 2015; 186:28-35. [PMID: 25868626 DOI: 10.1016/j.cbpb.2015.04.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2014] [Revised: 03/19/2015] [Accepted: 04/01/2015] [Indexed: 12/19/2022]
Abstract
HIF-prolyl-hydroxylase-2 (Phd2), a member of the iron (II) and 2-oxoglutarate-dependent dioxygenase family, is one of the key enzymes in hypoxia-sensing pathways. In this study, the phd2 cDNA sequence (1231bp), including an open reading frame (ORF) and encoding 358 amino acid residues was identified in Megalobrama amblycephala (Wuchang bream). The predicted Phd2 protein contained three conserved domains, MYND type zinc finger domain with critical regulatory activity, Fe(2+)-dependent 2OG-Fe (II) oxygenase superfamily domain with prolyl hydroxylase function, and P4Hc (prolyl 4-hydroxylase alpha subunit homologues) domain for catalyzing proline hydroxylation. The real-time PCR results showed that phd2 mRNA was ubiquitously expressed in all detected tissues with higher levels in the peripheral blood, heart and brain, and all embryogenesis stages, especially in mid-blastula stage. In larvae M. amblycephala, the expression trend of the phd2 and hypoxia-inducible factor 1 alpha (hif-1α) mRNA was opposite during hypoxia with an increase (hypoxia for 4h) and then decrease (hypoxia for 12h) for phd2. Whereas in adult fish, the phd2 mRNA appeared a transient increase under hypoxia for 4h (DO: 3.46±0.59 mg/L), and dramatically reduced with further hypoxia exposure to 12h in the peripheral blood, muscle, head kidney, liver and brain, but showed an opposite expression trend in the heart and gill. The hif-1α expression was contrary with phd2 in the peripheral blood, while it gradually decreased in the heart, but increased in the liver with continuous hypoxia treatment. Additionally, hif-1α also showed lower mRNA levels than phd2 in all detected tissues under normoxia and hypoxia conditions.
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Affiliation(s)
- Huijuan Wang
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fishery, Huazhong Agricultural University, 430070, Wuhan, PR China
| | - Chunxiao Huang
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fishery, Huazhong Agricultural University, 430070, Wuhan, PR China
| | - Nan Chen
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fishery, Huazhong Agricultural University, 430070, Wuhan, PR China
| | - Kecheng Zhu
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fishery, Huazhong Agricultural University, 430070, Wuhan, PR China
| | - Boxiang Chen
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fishery, Huazhong Agricultural University, 430070, Wuhan, PR China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, 430070 Wuhan, PR China; Hubei BaiRong Improved Aquatic Seed Co., Ltd, 438800 Huanggang, PR China
| | - Weimin Wang
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fishery, Huazhong Agricultural University, 430070, Wuhan, PR China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, 430070 Wuhan, PR China
| | - Huanling Wang
- Key Laboratory of Freshwater Animal Breeding, Ministry of Agriculture, Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Ministry of Education, College of Fishery, Huazhong Agricultural University, 430070, Wuhan, PR China; Freshwater Aquaculture Collaborative Innovation Center of Hubei Province, 430070 Wuhan, PR China.
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