1
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Chen S, Li D, Zeng Z, Zhang W, Xie H, Tang J, Liao S, Cai W, Liu F, Tang D, Dai Y. Analysis of proteome and post-translational modifications of 2-hydroxyisobutyrylation reveals the glycolysis pathway in oral adenoid cystic carcinoma. World J Surg Oncol 2023; 21:301. [PMID: 37741973 PMCID: PMC10517466 DOI: 10.1186/s12957-023-03155-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: 05/18/2023] [Accepted: 08/19/2023] [Indexed: 09/25/2023] Open
Abstract
PURPOSE Oral adenoid cystic carcinoma (OACC) has high rates of both local-regional recurrence and distant metastasis. The objective of this study is to investigate the impact of Khib on OACC and its potential as a targeted therapeutic intervention. EXPERIMENTAL DESIGN: We investigated the DEPs (differentially expressed proteins) and DHMPs between OACC-T and OACC-N using LC-MS/MS-based quantitative proteomics and using several bioinformatics methods, including GO enrichment analysis, KEGG pathway analysis, subcellular localization prediction, MEA (motif enrichment analysis), and PPI (protein-protein interaction networks) to illustrate how Khib modification interfere with OACC evolution. RESULTS Compared OACC-tumor samples (OACC-T) with the adjacent normal samples (OACC-N), there were 3243 of the DEPs and 2011 Khib sites were identified on 764 proteins (DHMPs). DEPs and DHMPs were strongly associated to glycolysis pathway. GAPDH of K254, ENO of K228, and PGK1 of K323 were modified by Khib in OACC-T. Khib may increase the catalytic efficiency to promote glycolysis pathway and favor OACC progression. CONCLUSIONS AND CLINICAL RELEVANCE Khib may play a significant role in the mechanism of OACC progression by influencing the enzyme activity of the glycolysis pathway. These findings may provide new therapeutic options of OACC.
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Affiliation(s)
- Sining Chen
- Clinical Medical Research Center, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), Jinan University, Shenzhen, 518020, Guangdong, China
- Nephrology Department, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, 510632, China
| | - Dandan Li
- Clinical Medical Research Center, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), Jinan University, Shenzhen, 518020, Guangdong, China
- Experimental Center, Shenzhen Pingle Orthopedic Hospital (Shenzhen Pingshan Traditional Chinese Medicine Hospital), Shenzhen, Guangdong, 518118, China
| | - Zhipeng Zeng
- Clinical Medical Research Center, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), Jinan University, Shenzhen, 518020, Guangdong, China
| | - Wei Zhang
- Clinical Medical Research Center, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), Jinan University, Shenzhen, 518020, Guangdong, China
| | - Hongliang Xie
- Department of Oral and Maxillofacial Surgery, Stomatological Medical Center, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, Guangdong, China
| | - Jianming Tang
- Department of Oral and Maxillofacial Surgery, Stomatological Medical Center, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), Shenzhen, 518020, Guangdong, China
| | - Shengyou Liao
- Clinical Medical Research Center, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), Jinan University, Shenzhen, 518020, Guangdong, China
| | - Wanxia Cai
- Clinical Medical Research Center, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), Jinan University, Shenzhen, 518020, Guangdong, China
| | - Fanna Liu
- Nephrology Department, The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, 510632, China.
| | - Donge Tang
- Clinical Medical Research Center, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), Jinan University, Shenzhen, 518020, Guangdong, China.
| | - Yong Dai
- Clinical Medical Research Center, The Second Clinical Medical College of Jinan University (Shenzhen People's Hospital), Jinan University, Shenzhen, 518020, Guangdong, China.
- Comprehensive health Industry Research Center, Taizhou Research Institute, Southern University of Science and Technology, Taizhou, 318000, China.
- Department of Organ Transplantation, No.924 Hospital of PLA Joint Logistic Support Force, Medical quality specialty of the Joint Logistic Support Force, Guilin, 541002, China.
- The first affiliated hospital, School of Medicine, Anhui University of Science and Technology, Huainan, Anhui, 232001, China.
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2
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Fu CY, Chen HY, Lin CY, Chen SJ, Sheu JC, Tsai HJ. Extracellular Pgk1 interacts neural membrane protein enolase-2 to improve the neurite outgrowth of motor neurons. Commun Biol 2023; 6:849. [PMID: 37582937 PMCID: PMC10427645 DOI: 10.1038/s42003-023-05223-0] [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: 12/08/2022] [Accepted: 08/07/2023] [Indexed: 08/17/2023] Open
Abstract
Understanding the molecular interaction between ligand and receptor is important for providing the basis for the development of regenerative drugs. Although it has been reported that extracellular phosphoglycerate kinase 1 (Pgk1) can promote the neurite outgrowth of motoneurons, the Pgk1-interacting neural receptor remains unknown. Here we show that neural membranous Enolase-2 exhibits strong affinity with recombinant Pgk1-Flag, which is also evidently demonstrated by immunoelectron microscopy. The 325th-417th domain of Pgk1 interacts with the 405th-431st domain of Enolase-2, but neither Enolase-1 nor Enolase-3, promoting neurite outgrowth. Combining Pgk1 incubation and Enolase-2 overexpression, we demonstrate a highly significant enhancement of neurite outgrowth of motoneurons through a reduced p-P38-T180/p-Limk1-S323/p-Cofilin signaling. Collectively, extracellular Pgk1 interacts neural membrane receptor Enolase-2 to reduce the P38/Limk1/Cofilin signaling which results in promoting neurite outgrowth. The extracellular Pgk1-specific neural receptor found in this study should provide a material for screening potential small molecule drugs that promote motor nerve regeneration.
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Affiliation(s)
- Chuan-Yang Fu
- Department of Life Science, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Hong-Yu Chen
- Institute of Molecular and Cellular Biology, National Taiwan University, Taipei, Taiwan
| | - Cheng-Yung Lin
- Institute of Biomedical Sciences, MacKay Medical College, New Taipei City, Taiwan
| | - Shiang-Jiuun Chen
- Department of Life Science and Institute of Ecology and Evolutionary Biology, National Taiwan University, Taipei, Taiwan
- TechCommon-5, Bioimage Tool, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Jin-Chuan Sheu
- Liver Disease Prevention and Treatment Research Foundation, Taipei, Taiwan
| | - Huai-Jen Tsai
- Department of Life Science, Fu Jen Catholic University, New Taipei City, Taiwan.
- Institute of Molecular and Cellular Biology, National Taiwan University, Taipei, Taiwan.
- School of Medicine, College of Medicine, Fu Jen Catholic University, New Taipei, City, Taiwan.
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3
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Loss of stability and unfolding cooperativity in hPGK1 upon gradual structural perturbation of its N-terminal domain hydrophobic core. Sci Rep 2022; 12:17200. [PMID: 36229482 PMCID: PMC9561527 DOI: 10.1038/s41598-022-22088-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 10/10/2022] [Indexed: 01/06/2023] Open
Abstract
Phosphoglycerate kinase has been a model for the stability, folding cooperativity and catalysis of a two-domain protein. The human isoform 1 (hPGK1) is associated with cancer development and rare genetic diseases that affect several of its features. To investigate how mutations affect hPGK1 folding landscape and interaction networks, we have introduced mutations at a buried site in the N-terminal domain (F25 mutants) that either created cavities (F25L, F25V, F25A), enhanced conformational entropy (F25G) or introduced structural strain (F25W) and evaluated their effects using biophysical experimental and theoretical methods. All F25 mutants folded well, but showed reduced unfolding cooperativity, kinetic stability and altered activation energetics according to the results from thermal and chemical denaturation analyses. These alterations correlated well with the structural perturbation caused by mutations in the N-terminal domain and the destabilization caused in the interdomain interface as revealed by H/D exchange under native conditions. Importantly, experimental and theoretical analyses showed that these effects are significant even when the perturbation is mild and local. Our approach will be useful to establish the molecular basis of hPGK1 genotype-phenotype correlations due to phosphorylation events and single amino acid substitutions associated with disease.
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4
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Liu H, Wang X, Shen P, Ni Y, Han X. The basic functions of phosphoglycerate kinase 1 and its roles in cancer and other diseases. Eur J Pharmacol 2022; 920:174835. [DOI: 10.1016/j.ejphar.2022.174835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 02/15/2022] [Indexed: 01/17/2023]
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5
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He Y, Luo Y, Zhang D, Wang X, Zhang P, Li H, Ejaz S, Liang S. PGK1-mediated cancer progression and drug resistance. Am J Cancer Res 2019; 9:2280-2302. [PMID: 31815035 PMCID: PMC6895440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 10/21/2019] [Indexed: 06/10/2023] Open
Abstract
Phosphoglycerate kinase 1 (PGK1) is an essential enzyme in the aerobic glycolysis pathway. PGK1 catalyzes the reversible transfer of a phosphate group from 1,3-bisphosphoglycerate to ADP and produces 3-phosphoglycerate and ATP. In addition to cell metabolism regulation, PGK1 is involved in multiple biological activities, including angiogenesis, autophagy and DNA repair. Because of its multi-faceted functions, PGK1's involvement in cancer development is complicated. High intracellular expression of PGK1 leads to tumor cell proliferation. However, high extracellular expression of PGK1 suppresses cancer malignancy through a suppression of angiogenesis. PGK1 is also associated with chemoradiotherapy resistance and poor prognosis of cancer patients. In this manuscript, we summarize the influence of PGK1 and its post-translational modifications on cancer initiation and progression. PGK1-mediated drug resistance and potential small molecule inhibitors targeting PGK1 are discussed for their future clinical applications.
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Affiliation(s)
- Yu He
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for BiotherapyChengdu 610041, P. R. China
| | - Yang Luo
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for BiotherapyChengdu 610041, P. R. China
| | - Dan Zhang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for BiotherapyChengdu 610041, P. R. China
| | - Xixi Wang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for BiotherapyChengdu 610041, P. R. China
| | - Peng Zhang
- Department of Urinary Surgery, West China Hospital, West China Medical School, Sichuan UniversityChengdu 610041, P. R. China
| | - Haocheng Li
- Department of Mathematics and Statistics, University of CalgaryCalgary, AB T2N 1N4, Canada
| | - Samina Ejaz
- Department of Biochemistry and Biotechnology, The Islamia University of BahawalpurBahawalpur, Pakistan
| | - Shufang Liang
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Collaborative Innovation Center for BiotherapyChengdu 610041, P. R. China
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6
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Lin CY, Wu CL, Lee KZ, Chen YJ, Zhang PH, Chang CY, Harn HJ, Lin SZ, Tsai HJ. Extracellular Pgk1 enhances neurite outgrowth of motoneurons through Nogo66/NgR-independent targeting of NogoA. eLife 2019; 8:49175. [PMID: 31361595 PMCID: PMC6667276 DOI: 10.7554/elife.49175] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Accepted: 07/05/2019] [Indexed: 12/11/2022] Open
Abstract
NogoA inhibits neurite outgrowth of motoneurons (NOM) through interaction with its receptors, Nogo66/NgR. Inhibition of Nogo receptors rescues NOM, but not to the extent exhibited by NogoA-knockout mice, suggesting the presence of other pathways. We found that NogoA-overexpressing muscle cells reduced phosphoglycerate kinase 1 (Pgk1) secretion, resulting in inhibiting NOM. Apart from its glycolytic role and independent of the Nogo66 pathway, extracellular Pgk1 stimulated NOM by triggering a reduction of p-Cofilin-S3, a growth cone collapse marker, through decreasing a novel Rac1-GTP/p-Pak1-T423/p-P38-T180/p-MK2-T334/p-Limk1-S323/p-Cofilin-S3 molecular pathway. Not only did supplementary Pgk1 enhance NOM in defective cells, but injection of Pgk1 rescued denervation in muscle-specific NogoA-overexpression of zebrafish and an Amyotrophic Lateral Sclerosis mouse model, SOD1 G93A. Thus, Pgk1 secreted from muscle is detrimental to motoneuron neurite outgrowth and maintenance.
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Affiliation(s)
- Cheng Yung Lin
- Institute of Biomedical Sciences, Mackay Medical College, New Taipei City, Taiwan
| | - Chia Lun Wu
- Institute of Molecular and Cellular Biology, National Taiwan University, Taipei, Taiwan
| | - Kok Zhi Lee
- Institute of Molecular and Cellular Biology, National Taiwan University, Taipei, Taiwan
| | - You Jei Chen
- Institute of Molecular and Cellular Biology, National Taiwan University, Taipei, Taiwan
| | - Po Hsiang Zhang
- Institute of Biomedical Sciences, Mackay Medical College, New Taipei City, Taiwan
| | - Chia Yu Chang
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien City, Taiwan.,Department of Medical Research and Neuroscience Center, Buddhist Tzu Chi General Hospital, Hualien City, Taiwan
| | - Horng Jyh Harn
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien City, Taiwan.,Department of Pathology, Buddhist Tzu Chi General Hospital and Tzu Chi University, Hualien City, Taiwan
| | - Shinn Zong Lin
- Bioinnovation Center, Buddhist Tzu Chi Medical Foundation, Hualien City, Taiwan.,Department of Neurosurgery, Buddhist Tzu Chi General Hospital, Hualien City, Taiwan
| | - Huai Jen Tsai
- Institute of Biomedical Sciences, Mackay Medical College, New Taipei City, Taiwan
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7
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Mesa-Torres N, Betancor-Fernández I, Oppici E, Cellini B, Salido E, Pey AL. Evolutionary Divergent Suppressor Mutations in Conformational Diseases. Genes (Basel) 2018; 9:E352. [PMID: 30011855 PMCID: PMC6071075 DOI: 10.3390/genes9070352] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 07/09/2018] [Accepted: 07/11/2018] [Indexed: 12/26/2022] Open
Abstract
Neutral and adaptive mutations are key players in the evolutionary dynamics of proteins at molecular, cellular and organismal levels. Conversely, largely destabilizing mutations are rarely tolerated by evolution, although their occurrence in diverse human populations has important roles in the pathogenesis of conformational diseases. We have recently proposed that divergence at certain sites from the consensus (amino acid) state during mammalian evolution may have rendered some human proteins more vulnerable towards disease-associated mutations, primarily by decreasing their conformational stability. We herein extend and refine this hypothesis discussing results from phylogenetic and structural analyses, structure-based energy calculations and structure-function studies at molecular and cellular levels. As proof-of-principle, we focus on different mammalian orthologues of the NQO1 (NAD(P)H:quinone oxidoreductase 1) and AGT (alanine:glyoxylate aminotransferase) proteins. We discuss the different loss-of-function pathogenic mechanisms associated with diseases involving the two enzymes, including enzyme inactivation, accelerated degradation, intracellular mistargeting, and aggregation. Last, we take into account the potentially higher robustness of mammalian orthologues containing certain consensus amino acids as suppressors of human disease, and their relation with different intracellular post-translational modifications and protein quality control capacities, to be discussed as sources of phenotypic variability between human and mammalian models of disease and as tools for improving current therapeutic approaches.
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Affiliation(s)
- Noel Mesa-Torres
- Department of Physical Chemistry, University of Granada, 18010 Granada, Spain.
| | - Isabel Betancor-Fernández
- Hospital Universitario de Canarias, Center for Rare Diseases (CIBERER), University of La Laguna, 38320 Tenerife, Spain.
| | - Elisa Oppici
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Biological Chemistry, University of Verona, 37134 Verona, Italy.
| | - Barbara Cellini
- Department of Experimental Medicine, University of Perugia, 06132 Perugia, Italy.
| | - Eduardo Salido
- Hospital Universitario de Canarias, Center for Rare Diseases (CIBERER), University of La Laguna, 38320 Tenerife, Spain.
| | - Angel L Pey
- Department of Physical Chemistry, University of Granada, 18010 Granada, Spain.
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8
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PGK1 Drives Hepatocellular Carcinoma Metastasis by Enhancing Metabolic Process. Int J Mol Sci 2017; 18:ijms18081630. [PMID: 28749413 PMCID: PMC5578020 DOI: 10.3390/ijms18081630] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 07/12/2017] [Accepted: 07/22/2017] [Indexed: 01/04/2023] Open
Abstract
During the proliferation and metastasis, the tumor cells prefer glycolysis (Warburg effect), but its exact mechanism remains largely unknown. In this study, we demonstrated that phosphoglycerate kinase 1 (PGK1) is an important enzyme in the pathway of metabolic glycolysis. We observed a significant overexpression of PGK1 in hepatocellular carcinoma tissues, and a correlation between PGK1 expression and poor survival of hepatocellular carcinoma patients. Also, the depletion of PGK1 dramatically reduced cancer cell proliferation and metastasis, indicating an oncogenic role of PGK1 in liver cancer progression. Further experiments showed that PGK1 played an important role in MYC-induced metabolic reprogramming, which led to an enhanced Warburg effect. Our results revealed a new effect of PGK1, which can provide a new treatment strategy for hepatocellular carcinoma, as PGK1 is used to indicate the prognosis of hepatocellular carcinoma (HCC).
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9
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Liu F, Du J, Liu J, Wen B. Identification of key target genes and pathways in laryngeal carcinoma. Oncol Lett 2016; 12:1279-1286. [PMID: 27446427 PMCID: PMC4950495 DOI: 10.3892/ol.2016.4750] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Accepted: 04/08/2016] [Indexed: 02/05/2023] Open
Abstract
The purpose of the present study was to screen the key genes associated with laryngeal carcinoma and to investigate the molecular mechanism of laryngeal carcinoma progression. The gene expression profile of GSE10935 [Gene Expression Omnibus (GEO) accession number], including 12 specimens from laryngeal papillomas and 12 specimens from normal laryngeal epithelia controls, was downloaded from the GEO database. Differentially expressed genes (DEGs) were screened in laryngeal papillomas compared with normal controls using Limma package in R language, followed by Gene Ontology (GO) enrichment analysis and pathway enrichment analysis. Furthermore, the protein-protein interaction (PPI) network of DEGs was constructed using Cytoscape software and modules were analyzed using MCODE plugin from the PPI network. Furthermore, significant biological pathway regions (sub-pathway) were identified by using iSubpathwayMiner analysis. A total of 67 DEGs were identified, including 27 up-regulated genes and 40 down-regulated genes and they were involved in different GO terms and pathways. PPI network analysis revealed that Ras association (RalGDS/AF-6) domain family member 1 (RASSF1) was a hub protein. The sub-pathway analysis identified 9 significantly enriched sub-pathways, including glycolysis/gluconeogenesis and nitrogen metabolism. Genes such as phosphoglycerate kinase 1 (PGK1), carbonic anhydrase II (CA2), and carbonic anhydrase XII (CA12) whose node degrees were >10 were identified in the disease risk sub-pathway. Genes in the sub-pathway, such as RASSF1, PGK1, CA2 and CA12 were presumed to serve critical roles in laryngeal carcinoma. The present study identified DEGs and their sub-pathways in the disease, which may serve as potential targets for treatment of laryngeal carcinoma.
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Affiliation(s)
- Feng Liu
- Department of Otorhinolaryngology, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Jintao Du
- Department of Otorhinolaryngology, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Jun Liu
- Department of Otorhinolaryngology, West China School of Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Bei Wen
- Department of Otorhinolaryngology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu, Sichuan 610072, P.R. China
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10
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dos Santos ES, Gritta DHS, de Almeida JS. Analysis of interactions between potent inhibitors of ATP sulfurylase via molecular dynamics. MOLECULAR SIMULATION 2015. [DOI: 10.1080/08927022.2015.1064914] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Pey AL, Maggi M, Valentini G. Insights into human phosphoglycerate kinase 1 deficiency as a conformational disease from biochemical, biophysical, and in vitro expression analyses. J Inherit Metab Dis 2014; 37:909-16. [PMID: 24838780 DOI: 10.1007/s10545-014-9721-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 04/17/2014] [Accepted: 04/22/2014] [Indexed: 12/14/2022]
Abstract
Mutations in genes encoding metabolic enzymes are often the cause of inherited diseases. Mutations usually affect the ability of proteins to fold properly, thus leading to enzyme loss of function. In this work, we explored the relationships between protein stability, aggregation, and degradation in vitro and inside cells in a large set of mutants associated with human phosphoglycerate kinase 1 (hPGK1) deficiency. To this end, we studied a third of the pathogenic alleles reported in the literature using expression analyses and biochemical, biophysical, and computational procedures. Our results show that most pathogenic variants studied had an increased tendency to aggregate when expressed in Escherichia coli, well correlating with the denaturation half-lives measured by thermal denaturation in vitro. Further, the most deleterious mutants show reduced stability toward chemical denaturation and proteolysis, supporting a pivotal role of thermodynamic stability in the propensity toward aggregation and proteolysis of pathogenic hPGK1 mutants in vitro and inside cells. Our strategy allowed us to unravel the complex relationships between protein stability, aggregation, and degradation in hPGK1 deficiency, which might be used to understand disease mechanisms in many inborn errors of metabolism. Our results suggest that pharmacological chaperones and protein homeostasis modulators could be considered as good candidates for therapeutic approaches for hPGK1 deficiency.
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Affiliation(s)
- Angel L Pey
- Department of Physical Chemistry, University of Granada, Granada, Spain,
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12
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Mesa-Torres N, Salido E, Pey AL. The lower limits for protein stability and foldability in primary hyperoxaluria type I. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2014; 1844:2355-65. [PMID: 25461797 DOI: 10.1016/j.bbapap.2014.10.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Revised: 09/29/2014] [Accepted: 10/10/2014] [Indexed: 01/12/2023]
Abstract
Mutational effects on protein stability and foldability are important to understand conformational diseases and protein evolution. In this work, we perform a comprehensive investigation on the energetic basis underlying mutational effects on the stability of human alanine:glyoxylate aminotransferase (AGT). We study twenty two variants whose kinetic stabilities span over eleven orders of magnitude and are classified into two groups: i) ten naturally-occurring variants, including the most common mutations causing primary hyperoxaluria type I (PH1); and ii) twelve consensus variants obtained by sequence-alignment statistics. We show that AGT dimer stability determines denaturation rates, and mutations modulate stability by changes in the effective thermodynamic stability, the aggregation propensity of partially/globally unfolded states and subtle energetic changes in the rate-limiting denaturation step. In combination with our previous expression analyses in eukaryotic cells, we propose the existence of two lower limits for AGT stability, one linked to optimal folding efficiency (close to the major allele stability) and the other setting a minimal efficiency compatible with glyoxylate detoxification in vivo (close to the minor allele stability). These lower limits could explain the high prevalence of misfolding as a disease mechanism in PH1 and support the use of pharmacological ligands aimed to increase AGT stability as therapies for this disease.
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Affiliation(s)
- Noel Mesa-Torres
- Departamento de Química-Física, Facultad de Ciencias, Universidad de Granada, E-18071 Granada, Spain
| | - Eduardo Salido
- Hospital Universitario de Canarias, Universidad La Laguna, Centre for Biomedical Research on Rare Diseases (CIBERER), Tenerife E-38320, Spain
| | - Angel L Pey
- Departamento de Química-Física, Facultad de Ciencias, Universidad de Granada, E-18071 Granada, Spain.
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Pey AL. pH-dependent relationship between thermodynamic and kinetic stability in the denaturation of human phosphoglycerate kinase 1. Biochimie 2014; 103:7-15. [PMID: 24721582 DOI: 10.1016/j.biochi.2014.03.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Accepted: 03/27/2014] [Indexed: 12/14/2022]
Abstract
Human phosphoglycerate kinase 1 (hPGK1) is a glycolytic enzyme essential for ATP synthesis, and it is implicated in different pathological conditions such as inherited diseases, oncogenesis and activation of drugs for cancer and viral treatments. Particularly, mutations in hPGK1 cause human PGK1 deficiency, a rate metabolic conformational disease. We have recently found that most of these mutations cause protein kinetic destabilization by significant changes in the structure/energetics of the transition state for irreversible denaturation. In this work, we explore the relationships between protein conformation, thermodynamic and kinetic stability in hPGK1 by performing comprehensive analyses in a wide pH range (2.5-8). hPGK1 remains in a native conformation at pH 5-8, but undergoes a conformational transition to a molten globule-like state at acidic pH. Interestingly, hPGK1 kinetic stability remains essentially constant at pH 6-8, but is significantly reduced when pH is decreased from 6 to 5. We found that this decrease in kinetic stability is caused by significant changes in the energetic/structural balance of the denaturation transition state, which diverge from those found for disease-causing mutations. We also show that protein kinetic destabilization by acidic pH is strongly linked to lower thermodynamic stability, while in disease-causing mutations seems to be linked to lower unfolding cooperativity. These results highlight the plasticity of the hPGK1 denaturation mechanism that responds differently to changes in pH and in disease-causing mutations. New insight is presented into the different factors contributing to hPGK1 thermodynamic and kinetic stability and the role of denaturation mechanisms in hPGK1 deficiency.
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Affiliation(s)
- Angel L Pey
- Department of Physical Chemistry, Faculty of Sciences, University of Granada, Av./Fuentenueva s/n, E-18071 Granada, Spain.
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