1
|
Tong Jia Ming S, Tan Yi Jun K, Carissimo G. Pathogenicity and virulence of O'nyong-nyong virus: A less studied Togaviridae with pandemic potential. Virulence 2024; 15:2355201. [PMID: 38797948 PMCID: PMC11135837 DOI: 10.1080/21505594.2024.2355201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 05/10/2024] [Indexed: 05/29/2024] Open
Abstract
O'nyong-nyong virus (ONNV) is a neglected mosquito-borne alphavirus belonging to the Togaviridae family. ONNV is known to be responsible for sporadic outbreaks of acute febrile disease and polyarthralgia in Africa. As climate change increases the geographical range of known and potential new vectors, recent data indicate a possibility for ONNV to spread outside of the African continent and grow into a greater public health concern. In this review, we summarise the current knowledge on ONNV epidemiology, host-pathogen interactions, vector-virus responses, and insights into possible avenues to control risk of further epidemics. In this review, the limited ONNV literature is compared and correlated to other findings on mainly Old World alphaviruses. We highlight and discuss studies that investigate viral and host factors that determine viral-vector specificity, along with important mechanisms that determine severity and disease outcome of ONNV infection.
Collapse
Affiliation(s)
- Samuel Tong Jia Ming
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Katrina Tan Yi Jun
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Guillaume Carissimo
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Infectious Diseases Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technical University, Singapore, Singapore
| |
Collapse
|
2
|
Noireterre A, Stutz F. Cdc48/p97 segregase: Spotlight on DNA-protein crosslinks. DNA Repair (Amst) 2024; 139:103691. [PMID: 38744091 DOI: 10.1016/j.dnarep.2024.103691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 04/30/2024] [Accepted: 05/01/2024] [Indexed: 05/16/2024]
Abstract
The ATP-dependent molecular chaperone Cdc48 (in yeast) and its human counterpart p97 (also known as VCP), are essential for a variety of cellular processes, including the removal of DNA-protein crosslinks (DPCs) from the DNA. Growing evidence demonstrates in the last years that Cdc48/p97 is pivotal in targeting ubiquitinated and SUMOylated substrates on chromatin, thereby supporting the DNA damage response. Along with its cofactors, notably Ufd1-Npl4, Cdc48/p97 has emerged as a central player in the unfolding and processing of DPCs. This review introduces the detailed structure, mechanism and cellular functions of Cdc48/p97 with an emphasis on the current knowledge of DNA-protein crosslink repair pathways across several organisms. The review concludes by discussing the potential therapeutic relevance of targeting p97 in DPC repair.
Collapse
Affiliation(s)
- Audrey Noireterre
- Department of Molecular and Cellular Biology, University of Geneva, Geneva 4 1211, Switzerland
| | - Françoise Stutz
- Department of Molecular and Cellular Biology, University of Geneva, Geneva 4 1211, Switzerland.
| |
Collapse
|
3
|
Li M, Ding W, Deng Y, Zhao Y, Liu Q, Zhou Z. The AAA-ATPase Ter94 regulates wing size in Drosophila by suppressing the Hippo pathway. Commun Biol 2024; 7:533. [PMID: 38710747 PMCID: PMC11074327 DOI: 10.1038/s42003-024-06246-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Accepted: 04/25/2024] [Indexed: 05/08/2024] Open
Abstract
Insect wing development is a fascinating and intricate process that involves the regulation of wing size through cell proliferation and apoptosis. In this study, we find that Ter94, an AAA-ATPase, is essential for proper wing size dependently on its ATPase activity. Loss of Ter94 enables the suppression of Hippo target genes. When Ter94 is depleted, it results in reduced wing size and increased apoptosis, which can be rescued by inhibiting the Hippo pathway. Biochemical experiments reveal that Ter94 reciprocally binds to Mer, a critical upstream component of the Hippo pathway, and disrupts its interaction with Ex and Kib. This disruption prevents the formation of the Ex-Mer-Kib complex, ultimately leading to the inactivation of the Hippo pathway and promoting proper wing development. Finally, we show that hVCP, the human homolog of Ter94, is able to substitute for Ter94 in modulating Drosophila wing size, underscoring their functional conservation. In conclusion, Ter94 plays a positive role in regulating wing size by interfering with the Ex-Mer-Kib complex, which results in the suppression of the Hippo pathway.
Collapse
Affiliation(s)
- Mingming Li
- College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Wenhao Ding
- College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Yanran Deng
- Key Laboratory of Biodiversity Conservation and Bioresource Utilization of Jiangxi Province, College of Life Sciences, Jiangxi Normal University, Nanchang, China
| | - Yunhe Zhao
- College of Life Sciences, Shandong Agricultural University, Tai'an, China
| | - Qingxin Liu
- College of Life Sciences, Shandong Agricultural University, Tai'an, China.
| | - Zizhang Zhou
- College of Life Sciences, Shandong Agricultural University, Tai'an, China.
- Key Laboratory of Biodiversity Conservation and Bioresource Utilization of Jiangxi Province, College of Life Sciences, Jiangxi Normal University, Nanchang, China.
| |
Collapse
|
4
|
Ahmed N, Preisinger C, Wilhelm T, Huber M. TurboID-Based IRE1 Interactome Reveals Participants of the Endoplasmic Reticulum-Associated Protein Degradation Machinery in the Human Mast Cell Leukemia Cell Line HMC-1.2. Cells 2024; 13:747. [PMID: 38727283 PMCID: PMC11082977 DOI: 10.3390/cells13090747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 04/02/2024] [Accepted: 04/17/2024] [Indexed: 05/13/2024] Open
Abstract
The unfolded protein response is an intricate system of sensor proteins in the endoplasmic reticulum (ER) that recognizes misfolded proteins and transmits information via transcription factors to either regain proteostasis or, depending on the severity, to induce apoptosis. The main transmembrane sensor is IRE1α, which contains cytoplasmic kinase and RNase domains relevant for its activation and the mRNA splicing of the transcription factor XBP1. Mast cell leukemia (MCL) is a severe form of systemic mastocytosis. The inhibition of IRE1α in the MCL cell line HMC-1.2 has anti-proliferative and pro-apoptotic effects, motivating us to elucidate the IRE1α interactors/regulators in HMC-1.2 cells. Therefore, the TurboID proximity labeling technique combined with MS analysis was applied. Gene Ontology and pathway enrichment analyses revealed that the majority of the enriched proteins are involved in vesicle-mediated transport, protein stabilization, and ubiquitin-dependent ER-associated protein degradation pathways. In particular, the AAA ATPase VCP and the oncoprotein MTDH as IRE1α-interacting proteins caught our interest for further analyses. The pharmacological inhibition of VCP activity resulted in the increased stability of IRE1α and MTDH as well as the activation of IRE1α. The interaction of VCP with both IRE1α and MTDH was dependent on ubiquitination. Moreover, MTDH stability was reduced in IRE1α-knockout cells. Hence, pharmacological manipulation of IRE1α-MTDH-VCP complex(es) might enable the treatment of MCL.
Collapse
Affiliation(s)
- Nabil Ahmed
- Institute of Biochemistry and Molecular Immunology, Medical Faculty, RWTH Aachen University, 52074 Aachen, Germany (T.W.)
| | - Christian Preisinger
- Proteomics Facility, Interdisciplinary Centre for Clinical Research (IZKF), RWTH Aachen University, 52074 Aachen, Germany;
| | - Thomas Wilhelm
- Institute of Biochemistry and Molecular Immunology, Medical Faculty, RWTH Aachen University, 52074 Aachen, Germany (T.W.)
| | - Michael Huber
- Institute of Biochemistry and Molecular Immunology, Medical Faculty, RWTH Aachen University, 52074 Aachen, Germany (T.W.)
| |
Collapse
|
5
|
Mirsanaye AS, Hoffmann S, Weisser M, Mund A, Lopez Mendez B, Typas D, van den Boom J, Benedict B, Hendriks IA, Nielsen ML, Meyer H, Duxin JP, Montoya G, Mailand N. VCF1 is a p97/VCP cofactor promoting recognition of ubiquitylated p97-UFD1-NPL4 substrates. Nat Commun 2024; 15:2459. [PMID: 38503733 PMCID: PMC10950897 DOI: 10.1038/s41467-024-46760-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 03/07/2024] [Indexed: 03/21/2024] Open
Abstract
The hexameric AAA+ ATPase p97/VCP functions as an essential mediator of ubiquitin-dependent cellular processes, extracting ubiquitylated proteins from macromolecular complexes or membranes by catalyzing their unfolding. p97 is directed to ubiquitylated client proteins via multiple cofactors, most of which interact with the p97 N-domain. Here, we discover that FAM104A, a protein of unknown function also named VCF1 (VCP/p97 nuclear Cofactor Family member 1), acts as a p97 cofactor in human cells. Detailed structure-function studies reveal that VCF1 directly binds p97 via a conserved α-helical motif that recognizes the p97 N-domain with unusually high affinity, exceeding that of other cofactors. We show that VCF1 engages in joint p97 complex formation with the heterodimeric primary p97 cofactor UFD1-NPL4 and promotes p97-UFD1-NPL4-dependent proteasomal degradation of ubiquitylated substrates in cells. Mechanistically, VCF1 indirectly stimulates UFD1-NPL4 interactions with ubiquitin conjugates via its binding to p97 but has no intrinsic affinity for ubiquitin. Collectively, our findings establish VCF1 as an unconventional p97 cofactor that promotes p97-dependent protein turnover by facilitating p97-UFD1-NPL4 recruitment to ubiquitylated targets.
Collapse
Affiliation(s)
- Ann Schirin Mirsanaye
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Saskia Hoffmann
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Melanie Weisser
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Andreas Mund
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Blanca Lopez Mendez
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Dimitris Typas
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Johannes van den Boom
- Molecular Biology I, Faculty of Biology, University of Duisburg-Essen, 45117, Essen, Germany
| | - Bente Benedict
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Ivo A Hendriks
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Michael Lund Nielsen
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Hemmo Meyer
- Molecular Biology I, Faculty of Biology, University of Duisburg-Essen, 45117, Essen, Germany
| | - Julien P Duxin
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Guillermo Montoya
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, DK-2200, Copenhagen, Denmark
| | - Niels Mailand
- Novo Nordisk Foundation Center for Protein Research, University of Copenhagen, DK-2200, Copenhagen, Denmark.
- Center for Chromosome Stability, Department of Cellular and Molecular Medicine, University of Copenhagen, DK-2200, Copenhagen, Denmark.
| |
Collapse
|
6
|
Mannar D, Ahmed S, Subramaniam S. AAA ATPase protein-protein interactions as therapeutic targets in cancer. Curr Opin Cell Biol 2024; 86:102291. [PMID: 38056141 DOI: 10.1016/j.ceb.2023.102291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/30/2023] [Accepted: 11/09/2023] [Indexed: 12/08/2023]
Abstract
AAA ATPases are a conserved group of enzymes that couple ATP hydrolysis to diverse activities critical for cellular homeostasis by targeted protein-protein interactions. Some of these interactions are potential therapeutic targets because of their role in cancers which rely on increased AAA ATPase activities for maintenance of genomic stability. Two well-characterized members of this family are p97/VCP and RUVBL ATPases where there is a growing understanding of their structure and function, as well as an emerging landscape of selective inhibitors. Here we highlight recent progress in this field, with particular emphasis on structural advances enabled by cryo-electron microscopy (cryo-EM).
Collapse
Affiliation(s)
- Dhiraj Mannar
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Sana Ahmed
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Sriram Subramaniam
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, BC V6T 1Z3, Canada; Gandeeva Therapeutics, Inc., Burnaby, BC V5C 6N5, Canada.
| |
Collapse
|
7
|
Lee DM, Kim IY, Lee HJ, Seo MJ, Cho MY, Lee HI, Yoon G, Ji JH, Park SS, Jeong SY, Choi EK, Choi YH, Yun CO, Yeo M, Kim E, Choi KS. Akt enhances the vulnerability of cancer cells to VCP/p97 inhibition-mediated paraptosis. Cell Death Dis 2024; 15:48. [PMID: 38218922 PMCID: PMC10787777 DOI: 10.1038/s41419-024-06434-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 12/19/2023] [Accepted: 01/04/2024] [Indexed: 01/15/2024]
Abstract
Valosin-containing protein (VCP)/p97, an AAA+ ATPase critical for maintaining proteostasis, emerges as a promising target for cancer therapy. This study reveals that targeting VCP selectively eliminates breast cancer cells while sparing non-transformed cells by inducing paraptosis, a non-apoptotic cell death mechanism characterized by endoplasmic reticulum and mitochondria dilation. Intriguingly, oncogenic HRas sensitizes non-transformed cells to VCP inhibition-mediated paraptosis. The susceptibility of cancer cells to VCP inhibition is attributed to the non-attenuation and recovery of protein synthesis under proteotoxic stress. Mechanistically, mTORC2/Akt activation and eIF3d-dependent translation contribute to translational rebound and amplification of proteotoxic stress. Furthermore, the ATF4/DDIT4 axis augments VCP inhibition-mediated paraptosis by activating Akt. Given that hyperactive Akt counteracts chemotherapeutic-induced apoptosis, VCP inhibition presents a promising therapeutic avenue to exploit Akt-associated vulnerabilities in cancer cells by triggering paraptosis while safeguarding normal cells.
Collapse
Affiliation(s)
- Dong Min Lee
- Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon, Republic of Korea
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - In Young Kim
- Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon, Republic of Korea
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - Hong Jae Lee
- Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon, Republic of Korea
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - Min Ji Seo
- Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon, Republic of Korea
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - Mi-Young Cho
- Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon, Republic of Korea
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - Hae In Lee
- Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon, Republic of Korea
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - Gyesoon Yoon
- Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon, Republic of Korea
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea
| | - Jae-Hoon Ji
- Department of Biochemistry and Structural Biology, University of Texas Health at San Antonio, San Antonio, TX, USA
- Greehey Children's Cancer Research Institute, University of Texas Health at San Antonio, San Antonio, TX, USA
| | - Seok Soon Park
- Asan Institute for Life Sciences, Department of Convergence Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Seong-Yun Jeong
- Asan Institute for Life Sciences, Department of Convergence Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Eun Kyung Choi
- Asan Institute for Life Sciences, Department of Convergence Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Yong Hyeon Choi
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul, Korea
| | - Chae-Ok Yun
- Department of Bioengineering, College of Engineering, Hanyang University, Seoul, Korea
| | - Mirae Yeo
- Department of Biological Sciences, Ulsan National Institute Science and Technology, Ulsan, South Korea
| | - Eunhee Kim
- Department of Biological Sciences, Ulsan National Institute Science and Technology, Ulsan, South Korea.
| | - Kyeong Sook Choi
- Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon, Republic of Korea.
- Department of Biomedical Sciences, Ajou University Graduate School of Medicine, Suwon, Republic of Korea.
| |
Collapse
|
8
|
Daskivich GJ, Brodsky JL. The generation of detergent-insoluble clipped fragments from an ERAD substrate in mammalian cells. Sci Rep 2023; 13:21508. [PMID: 38057493 PMCID: PMC10700608 DOI: 10.1038/s41598-023-48769-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Accepted: 11/30/2023] [Indexed: 12/08/2023] Open
Abstract
Proteostasis ensures the proper synthesis, folding, and trafficking of proteins and is required for cellular and organellar homeostasis. This network also oversees protein quality control within the cell and prevents accumulation of aberrant proteins, which can lead to cellular dysfunction and disease. For example, protein aggregates irreversibly disrupt proteostasis and can exert gain-of-function toxic effects. Although this process has been examined in detail for cytosolic proteins, how endoplasmic reticulum (ER)-tethered, aggregation-prone proteins are handled is ill-defined. To determine how a membrane protein with a cytoplasmic aggregation-prone domain is routed for ER-associated degradation (ERAD), we analyzed a new model substrate, TM-Ubc9ts. In yeast, we previously showed that TM-Ubc9ts ERAD requires Hsp104, which is absent in higher cells. In transient and stable HEK293 cells, we now report that TM-Ubc9ts degradation is largely proteasome-dependent, especially at elevated temperatures. In contrast to yeast, clipped TM-Ubc9ts polypeptides, which are stabilized upon proteasome inhibition, accumulate and are insoluble at elevated temperatures. TM-Ubc9ts cleavage is independent of the intramembrane protease RHBDL4, which clips other classes of ERAD substrates. These studies highlight an unappreciated mechanism underlying the degradation of aggregation-prone substrates in the ER and invite further work on other proteases that contribute to ERAD.
Collapse
Affiliation(s)
- Grant J Daskivich
- A320 Langley Hall, Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Jeffrey L Brodsky
- A320 Langley Hall, Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA, 15260, USA.
| |
Collapse
|
9
|
Wang F, Qi Q, Qin B, Wang Y, Huang Y, Li Q, Shen X, Wang X, Yang S, Pan G, Chen J, Qin Z, Chen X, Yang Y, Zeng Y, Liu J, Li Y, Li Y, Cheng Z, Lin X, Xing F, Zhang Y, Wang G, Li K, Jiang Z, Zhang H. Targeting VCP potentiates immune checkpoint therapy for colorectal cancer. Cell Rep 2023; 42:113318. [PMID: 37865914 DOI: 10.1016/j.celrep.2023.113318] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 07/24/2023] [Accepted: 10/06/2023] [Indexed: 10/24/2023] Open
Abstract
Immune checkpoint blockade therapies are still ineffective for most patients with colorectal cancer (CRC). Immunogenic cell death (ICD) enables the release of key immunostimulatory signals to drive efficient anti-tumor immunity, which could be used to potentiate the effects of immune checkpoint inhibitors. Here, we showed that inhibition of valosin-containing protein (VCP) elicits ICD in CRC. Meanwhile, VCP inhibitor upregulates PD-L1 expression and compromises anti-tumor immunity in vivo. Mechanistically, VCP transcriptionally regulates PD-L1 expression in a JAK1-dependent manner. Combining VCP inhibitor with anti-PD1 remodels tumor immune microenvironment and reduces tumor growth in mouse models of CRC. Addition of oncolytic virus further augments the therapeutic activity of the combination regimen. Our study shows the molecular mechanism for regulating PD-L1 expression by VCP and suggests that inhibition of VCP has the potential to increase the efficacy of immunotherapy in CRC.
Collapse
Affiliation(s)
- Fang Wang
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Qi Qi
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China; MOE Key Laboratory of Tumor Molecular Biology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Baifu Qin
- Institute of Molecular and Medical Virology, Key Laboratory of Ministry of Education for Viral Pathogenesis & Infection Prevention and Control, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China; Guangdong Research Institute of Gastroenterology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510655, China
| | - Yiwei Wang
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Youwei Huang
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China; Zhuhai Institute of Translational Medicine, Zhuhai People's Hospital Affiliated with Jinan University, Jinan University, Zhuhai, Guangdong 519000, China; Biomedical Translational Research Institute, Health Science Center (School of Medicine), Jinan University, Guangzhou, Guangdong 510632, China
| | - Qing Li
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Xi Shen
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Xiangyu Wang
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Shangqi Yang
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Guopeng Pan
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Jiahong Chen
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China; The Institute of Cardiovascular Sciences, School of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Zixi Qin
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Xueqin Chen
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Yuqing Yang
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Yuequan Zeng
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Jun Liu
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Yuqin Li
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Ying Li
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Zexiong Cheng
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Xi Lin
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Fan Xing
- Guangdong Provincial People's Hospital & Guangdong Academy of Medical Sciences, Guangzhou, Guangdong 510080, China
| | - Yubo Zhang
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China
| | - Guocai Wang
- Institute of Traditional Chinese Medicine & Natural Products, Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou, Guangdong 510632, China
| | - Kai Li
- Guangdong Research Institute of Gastroenterology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510655, China.
| | - Zhenyou Jiang
- Department of Microbiology and Immunology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China; Key Laboratory of Viral Pathogenesis & Infection Prevention and Control (Jinan University), Ministry of Education, Guangzhou 510632, China.
| | - Haipeng Zhang
- Department of Pharmacology, School of Medicine, Jinan University, Guangzhou, Guangdong 510632, China; Key Laboratory of Viral Pathogenesis & Infection Prevention and Control (Jinan University), Ministry of Education, Guangzhou 510632, China.
| |
Collapse
|
10
|
Braxton JR, Southworth DR. Structural insights of the p97/VCP AAA+ ATPase: How adapter interactions coordinate diverse cellular functionality. J Biol Chem 2023; 299:105182. [PMID: 37611827 PMCID: PMC10641518 DOI: 10.1016/j.jbc.2023.105182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 08/05/2023] [Accepted: 08/14/2023] [Indexed: 08/25/2023] Open
Abstract
p97/valosin-containing protein is an essential eukaryotic AAA+ ATPase with diverse functions including protein homeostasis, membrane remodeling, and chromatin regulation. Dysregulation of p97 function causes severe neurodegenerative disease and is associated with cancer, making this protein a significant therapeutic target. p97 extracts polypeptide substrates from macromolecular assemblies by hydrolysis-driven translocation through its central pore. Growing evidence indicates that this activity is highly coordinated by "adapter" partner proteins, of which more than 30 have been identified and are commonly described to facilitate translocation through substrate recruitment or modification. In so doing, these adapters enable critical p97-dependent functions such as extraction of misfolded proteins from the endoplasmic reticulum or mitochondria, and are likely the reason for the extreme functional diversity of p97 relative to other AAA+ translocases. Here, we review the known functions of adapter proteins and highlight recent structural and biochemical advances that have begun to reveal the diverse molecular bases for adapter-mediated regulation of p97 function. These studies suggest that the range of mechanisms by which p97 activity is controlled is vastly underexplored with significant advances possible for understanding p97 regulation by the most known adapters.
Collapse
Affiliation(s)
- Julian R Braxton
- Graduate Program in Chemistry and Chemical Biology, University of California, San Francisco, San Francisco, California, USA; Department of Biochemistry and Biophysics and Institute for Neurodegenerative Diseases, University of California, San Francisco, San Francisco, California, USA
| | - Daniel R Southworth
- Department of Biochemistry and Biophysics and Institute for Neurodegenerative Diseases, University of California, San Francisco, San Francisco, California, USA.
| |
Collapse
|
11
|
Shakya A, Liu P, Godek J, McKee NW, Dodson M, Anandhan A, Ooi A, Garcia JGN, Costa M, Chapman E, Zhang DD. The NRF2-p97-NRF2 negative feedback loop. Redox Biol 2023; 65:102839. [PMID: 37573837 PMCID: PMC10428046 DOI: 10.1016/j.redox.2023.102839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 07/15/2023] [Accepted: 08/04/2023] [Indexed: 08/15/2023] Open
Abstract
p97 is a ubiquitin-targeted ATP-dependent segregase that regulates proteostasis, in addition to a variety of other cellular functions. Previously, we demonstrated that p97 negatively regulates NRF2 by extracting ubiquitylated NRF2 from the KEAP1-CUL3-RBX1 E3 ubiquitin ligase complex, facilitating proteasomal destruction. In the current study, we identified p97 as an NRF2-target gene that contains a functional ARE, indicating the presence of an NRF2-p97-NRF2 negative feedback loop that maintains redox homeostasis. Using CRISPR/Cas9 genome editing, we generated endogenous p97 ARE-mutated BEAS-2B cell lines. These p97 ARE-mutated cell lines exhibit altered expression of p97 and NRF2, as well as a compromised response to NRF2 inducers. Importantly, we also found a positive correlation between NRF2 activation and p97 expression in human cancer patients. Finally, using chronic arsenic-transformed cell lines, we demonstrated a synergistic effect of NRF2 and p97 inhibition in killing cancer cells with high NRF2 and p97 expression. Our study suggests dual upregulation of NRF2 and p97 occurs in certain types of cancers, suggesting that inhibition of both NRF2 and p97 could be a promising treatment strategy for stratified cancer patients.
Collapse
Affiliation(s)
- Aryatara Shakya
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721, USA
| | - Pengfei Liu
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721, USA; National & Local Joint Engineering Research Center of Biodiagnosis and Biotherapy, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China; International Joint Research Center on Cell Stress and Disease Diagnosis and Therapy, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Jack Godek
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721, USA
| | - Nicholas W McKee
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721, USA
| | - Matthew Dodson
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721, USA
| | - Annadurai Anandhan
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721, USA
| | - Aikseng Ooi
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721, USA
| | - Joe G N Garcia
- The Herbert Wertheim UF Scripps Institute for Biomedical Innovation & Technology, University of Florida, FL, 33458, USA
| | - Max Costa
- Departments of Environmental Medicine, and Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY, 10010, USA
| | - Eli Chapman
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721, USA.
| | - Donna D Zhang
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, AZ, 85721, USA.
| |
Collapse
|
12
|
Chu S, Xie X, Payan C, Stochaj U. Valosin containing protein (VCP): initiator, modifier, and potential drug target for neurodegenerative diseases. Mol Neurodegener 2023; 18:52. [PMID: 37545006 PMCID: PMC10405438 DOI: 10.1186/s13024-023-00639-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 06/27/2023] [Indexed: 08/08/2023] Open
Abstract
The AAA+ ATPase valosin containing protein (VCP) is essential for cell and organ homeostasis, especially in cells of the nervous system. As part of a large network, VCP collaborates with many cofactors to ensure proteostasis under normal, stress, and disease conditions. A large number of mutations have revealed the importance of VCP for human health. In particular, VCP facilitates the dismantling of protein aggregates and the removal of dysfunctional organelles. These are critical events to prevent malfunction of the brain and other parts of the nervous system. In line with this idea, VCP mutants are linked to the onset and progression of neurodegeneration and other diseases. The intricate molecular mechanisms that connect VCP mutations to distinct brain pathologies continue to be uncovered. Emerging evidence supports the model that VCP controls cellular functions on multiple levels and in a cell type specific fashion. Accordingly, VCP mutants derail cellular homeostasis through several mechanisms that can instigate disease. Our review focuses on the association between VCP malfunction and neurodegeneration. We discuss the latest insights in the field, emphasize open questions, and speculate on the potential of VCP as a drug target for some of the most devastating forms of neurodegeneration.
Collapse
Affiliation(s)
- Siwei Chu
- Department of Physiology, McGill University, Montreal, HG3 1Y6, Canada
| | - Xinyi Xie
- Department of Physiology, McGill University, Montreal, HG3 1Y6, Canada
| | - Carla Payan
- Department of Physiology, McGill University, Montreal, HG3 1Y6, Canada
| | - Ursula Stochaj
- Department of Physiology, McGill University, Montreal, HG3 1Y6, Canada.
- Quantitative Life Sciences Program, McGill University, Montreal, Canada.
| |
Collapse
|
13
|
Marin-Muller C, Li D, Lü JM, Liang Z, Vega-Martínez O, Crawford SE, Estes MK, Fisher WE, Chen C, Yao Q. Nanoparticle-Mediated Therapy with miR-198 Sensitizes Pancreatic Cancer to Gemcitabine Treatment through Downregulation of VCP-Mediated Autophagy. Pharmaceutics 2023; 15:2038. [PMID: 37631252 PMCID: PMC10457905 DOI: 10.3390/pharmaceutics15082038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 07/18/2023] [Accepted: 07/25/2023] [Indexed: 08/27/2023] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) remains an extremely aggressive disease characterized by rapidly acquired multi-drug resistance, including to first-line chemotherapeutic agent gemcitabine. Autophagy is a process that is often exploited by cancer and is one of several intrinsic factors associated with resistance to gemcitabine. We have previously found that miR-198 acts as a tumor suppressor in PDAC through the targeting of factors including Valosin-containing protein (VCP). VCP has been reported to play an important role in autophagic flux. In this study, we investigated whether the repression of VCP through miR-198 administration disrupts the autophagy process and sensitizes PDAC cells to gemcitabine treatment in vitro. Moreover, we used LGA-PEI (LPNP) nanoparticles to effectively administer miR-198 to tumors in vivo, inducing tumor sensitization to gemcitabine and leading to a significant reduction in tumor burden and metastases and a concomitant downregulation of VCP expression and autophagy maturation. Our results indicate a potential therapeutic strategy for targeting gemcitabine resistant PDAC and establishes the use of LPNPs for effective therapeutic delivery of nucleic acids in vitro and in vivo.
Collapse
Affiliation(s)
- Christian Marin-Muller
- Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA; (C.M.-M.)
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA
- Speratum Biopharma, Inc., Dover, DE 19901, USA
| | - Dali Li
- Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA; (C.M.-M.)
| | - Jian-Ming Lü
- Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA; (C.M.-M.)
| | - Zhengdong Liang
- Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA; (C.M.-M.)
| | | | - Sue E. Crawford
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Mary K. Estes
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA
| | - William E. Fisher
- Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA; (C.M.-M.)
| | - Changyi Chen
- Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA; (C.M.-M.)
| | - Qizhi Yao
- Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, TX 77030, USA; (C.M.-M.)
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030, USA
- Center for Translational Research on Inflammatory Diseases (CTRID), Michael E. DeBakey VA Medical Center, Houston, TX 77030, USA
| |
Collapse
|
14
|
LaPorte M, Alverez C, Chatterley A, Kovaliov M, Carder EJ, Houghton MJ, Lim C, Miller ER, Samankumara LP, Liang M, Kerrigan K, Yue Z, Li S, Tomaino F, Wang F, Green N, Stott GM, Srivastava A, Chou TF, Wipf P, Huryn DM. Optimization of 1,2,4-Triazole-Based p97 Inhibitors for the Treatment of Cancer. ACS Med Chem Lett 2023; 14:977-985. [PMID: 37465292 PMCID: PMC10351062 DOI: 10.1021/acsmedchemlett.3c00163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 06/14/2023] [Indexed: 07/20/2023] Open
Abstract
The AAA+ ATPase p97 (valosin-containing protein, VCP) is a master regulator of protein homeostasis and therefore represents a novel target for cancer therapy. Starting from a known allosteric inhibitor, NMS-873, we systematically optimized this scaffold, in particular, by applying a benzene-to-acetylene isosteric replacement strategy, specific incorporation of F, and eutomer/distomer identification, which led to compounds that exhibited nanomolar biochemical and cell-based potency. In cellular pharmacodynamic assays, robust effects on biomarkers of p97 inhibition and apoptosis, including increased levels of ubiquitinated proteins, CHOP and cleaved caspase 3, were observed. Compound (R)-29 (UPCDC-30766) represents the most potent allosteric inhibitor of p97 reported to date.
Collapse
Affiliation(s)
- Matthew
G. LaPorte
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Celeste Alverez
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Pharmaceutical Sciences, University of
Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Alexander Chatterley
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Marina Kovaliov
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Evan J. Carder
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Michael J. Houghton
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Chaemin Lim
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Eric R. Miller
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Lalith P. Samankumara
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Mary Liang
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Pharmaceutical Sciences, University of
Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Kaylan Kerrigan
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Zhizhou Yue
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Shan Li
- Division
of Biology and Biological Engineering, California
Institute of Technology, Pasadena, California 91125, United States
| | - Francesca Tomaino
- Leidos
Biomedical Research, Inc., Frederick, Maryland 21702, United States
| | - Feng Wang
- Division
of Biology and Biological Engineering, California
Institute of Technology, Pasadena, California 91125, United States
| | - Neal Green
- Leidos
Biomedical Research, Inc., Frederick, Maryland 21702, United States
| | - Gordon M. Stott
- Leidos
Biomedical Research, Inc., Frederick, Maryland 21702, United States
| | - Apurva Srivastava
- Leidos
Biomedical Research, Inc., Frederick, Maryland 21702, United States
| | - Tsui-Fen Chou
- Division
of Biology and Biological Engineering, California
Institute of Technology, Pasadena, California 91125, United States
| | - Peter Wipf
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Pharmaceutical Sciences, University of
Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Donna M. Huryn
- University
of Pittsburgh Chemical Diversity Center, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
- Department
of Pharmaceutical Sciences, University of
Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| |
Collapse
|
15
|
GLI1, a novel target of the ER stress regulator p97/VCP, promotes ATF6f-mediated activation of XBP1. BIOCHIMICA ET BIOPHYSICA ACTA. GENE REGULATORY MECHANISMS 2023; 1866:194924. [PMID: 36842643 DOI: 10.1016/j.bbagrm.2023.194924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 01/31/2023] [Accepted: 02/19/2023] [Indexed: 02/28/2023]
Abstract
Upon accumulation of improperly folded proteins in the Endoplasmic Reticulum (ER), the Unfolded Protein Response (UPR) is triggered to restore ER homeostasis. The induction of stress genes is a sine qua non condition for effective adaptive UPR. Although this requirement has been extensively described, the mechanisms underlying this process remain in part uncharacterized. Here, we show that p97/VCP, an AAA+ ATPase known to contribute to ER stress-induced gene expression, regulates the transcription factor GLI1, a primary effector of Hedgehog (Hh) signaling. Under basal (non-ER stress) conditions, GLI1 is repressed by a p97/VCP-HDAC1 complex while upon ER stress GLI1 is induced through a mechanism requiring both USF2 binding and increase histone acetylation at its promoter. Interestingly, the induction of GLI1 was independent of ligand-regulated Hh signaling. Further analysis showed that GLI1 cooperates with ATF6f to induce promoter activity and expression of XBP1, a key transcription factor driving UPR. Overall, our work demonstrates a novel role for GLI1 in the regulation of ER stress gene expression and defines the interplay between p97/VCP, HDAC1 and USF2 as essential players in this process.
Collapse
|