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Nakahara Y, Mitsui J, Date H, Porto KJ, Hayashi Y, Yamashita A, Kusakabe Y, Matsukawa T, Ishiura H, Yasuda T, Iwata A, Goto J, Ichikawa Y, Momose Y, Takahashi Y, Toda T, Ohta R, Yoshimura J, Morishita S, Gustavsson EK, Christy D, Maczis M, Farrer MJ, Kim HJ, Park SS, Jeon B, Zhang J, Gu W, Scholz SW, Singleton AB, Houlden H, Yabe I, Sasaki H, Matsushima M, Takashima H, Kikuchi A, Aoki M, Hara K, Kakita A, Yamada M, Takahashi H, Onodera O, Nishizawa M, Watanabe H, Ito M, Sobue G, Ishikawa K, Mizusawa H, Kanai K, Kuwabara S, Arai K, Koyano S, Kuroiwa Y, Hasegawa K, Yuasa T, Yasui K, Nakashima K, Ito H, Izumi Y, Kaji R, Kato T, Kusunoki S, Osaki Y, Horiuchi M, Yamamoto K, Shimada M, Miyagawa T, Kawai Y, Nishida N, Tokunaga K, Dürr A, Brice A, Filla A, Klockgether T, Wüllner U, Tanner CM, Kukull WA, Lee VMY, Masliah E, Low PA, Sandroni P, Ozelius L, Foroud T, Tsuji S. Genome-wide association study identifies a new susceptibility locus in PLA2G4C for Multiple System Atrophy. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.05.02.23289328. [PMID: 37425910 PMCID: PMC10327266 DOI: 10.1101/2023.05.02.23289328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/11/2023]
Abstract
To elucidate the molecular basis of multiple system atrophy (MSA), a neurodegenerative disease, we conducted a genome-wide association study (GWAS) in a Japanese MSA case/control series followed by replication studies in Japanese, Korean, Chinese, European and North American samples. In the GWAS stage rs2303744 on chromosome 19 showed a suggestive association ( P = 6.5 × 10 -7 ) that was replicated in additional Japanese samples ( P = 2.9 × 10 -6 . OR = 1.58; 95% confidence interval, 1.30 to 1.91), and then confirmed as highly significant in a meta-analysis of East Asian population data ( P = 5.0 × 10 -15 . Odds ratio= 1.49; 95% CI 1.35 to 1.72). The association of rs2303744 with MSA remained significant in combined European/North American samples ( P =0.023. Odds ratio=1.14; 95% CI 1.02 to 1.28) despite allele frequencies being quite different between these populations. rs2303744 leads to an amino acid substitution in PLA2G4C that encodes the cPLA2γ lysophospholipase/transacylase. The cPLA2γ-Ile143 isoform encoded by the MSA risk allele has significantly decreased transacylase activity compared with the alternate cPLA2γ-Val143 isoform that may perturb membrane phospholipids and α-synuclein biology.
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2
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The phospholipase A 2 superfamily as a central hub of bioactive lipids and beyond. Pharmacol Ther 2023; 244:108382. [PMID: 36918102 DOI: 10.1016/j.pharmthera.2023.108382] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/06/2023] [Accepted: 03/07/2023] [Indexed: 03/13/2023]
Abstract
In essence, "phospholipase A2" (PLA2) means a group of enzymes that release fatty acids and lysophospholipids by hydrolyzing the sn-2 position of glycerophospholipids. To date, more than 50 enzymes possessing PLA2 or related lipid-metabolizing activities have been identified in mammals, and these are subdivided into several families in terms of their structures, catalytic mechanisms, tissue/cellular localizations, and evolutionary relationships. From a general viewpoint, the PLA2 superfamily has mainly been implicated in signal transduction, driving the production of a wide variety of bioactive lipid mediators. However, a growing body of evidence indicates that PLA2s also contribute to phospholipid remodeling or recycling for membrane homeostasis, fatty acid β-oxidation for energy production, and barrier lipid formation on the body surface. Accordingly, PLA2 enzymes are considered one of the key regulators of a broad range of lipid metabolism, and perturbation of specific PLA2-driven lipid pathways often disrupts tissue and cellular homeostasis and may be associated with a variety of diseases. This review covers current understanding of the physiological functions of the PLA2 superfamily, focusing particularly on the two major intracellular PLA2 families (Ca2+-dependent cytosolic PLA2s and Ca2+-independent patatin-like PLA2s) as well as other PLA2 families, based on studies using gene-manipulated mice and human diseases in combination with comprehensive lipidomics.
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3
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Ragavendran PV, Tripathi V, Gandotra S. Structure prediction-based insights into the patatin family of Mycobacterium tuberculosis. MICROBIOLOGY (READING, ENGLAND) 2022; 168. [PMID: 36748562 DOI: 10.1099/mic.0.001270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Despite its genome sequencing more than two decades ago, the majority of the genes of Mycobacterium tuberculosis remain functionally uncharacterized. Patatins are one such class of proteins that, despite undergoing an expansion in this pathogenic species compared to their non-pathogenic cousins, remain largely unstudied. Recent advances in protein structure prediction using machine learning tools such as AlphaFold2 have provided high-confidence predicted structures for all M. tuberculosis proteins. Here we present detailed analyses of the patatin family of M. tuberculosis using AlphaFold-predicted structures, providing insights into likely modes of regulation, membrane interaction and substrate binding. Regulatory domains within this family of proteins include cyclic nucleotide binding, lid-like domains and other helical domains. Using structural homologues, we identified the likely membrane localization mechanisms and substrate-binding sites. These analyses reveal diversity in their regulatory capacity, mechanisms of membrane binding and likely length of fatty acid substrates. Together, this analysis suggests unique roles for the eight predicted patatins of M. tuberculosis.
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Affiliation(s)
- P V Ragavendran
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh- 201 002, India.,Immunology and Infectious Disease, CSIR-Institute of Genomics and Integrative Biology, New Delhi, India, New Delhi, India
| | - Vaishnavi Tripathi
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh- 201 002, India.,Immunology and Infectious Disease, CSIR-Institute of Genomics and Integrative Biology, New Delhi, India, New Delhi, India
| | - Sheetal Gandotra
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh- 201 002, India.,Immunology and Infectious Disease, CSIR-Institute of Genomics and Integrative Biology, New Delhi, India, New Delhi, India
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Murakami M, Takamiya R, Miki Y, Sugimoto N, Nagasaki Y, Suzuki-Yamamoto T, Taketomi Y. Segregated functions of two cytosolic phospholipase A 2 isoforms (cPLA 2α and cPLA 2ε) in lipid mediator generation. Biochem Pharmacol 2022; 203:115176. [PMID: 35841927 DOI: 10.1016/j.bcp.2022.115176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 07/08/2022] [Accepted: 07/08/2022] [Indexed: 12/16/2022]
Abstract
Among the phospholipase A2 (PLA2) superfamily, group IVA cytosolic PLA2 (cPLA2α) is currently attracting much attention as a central regulator of arachidonic acid (AA) metabolism linked to eicosanoid biosynthesis. Following cell activation, cPLA2α selectively releases AA, a precursor of a variety of eicosanoids, from phospholipids in perinuclear membrane compartments. cPLA2α-null mice display various phenotypes that could be largely explained by reduced eicosanoid signaling. In contrast, group IVE cPLA2ε, another member of the cPLA2 family, acts as a Ca2+-dependent N-acyltransferase rather than a PLA2, thereby regulating the biosynthesis of N-acylethanolamines (NAEs), a unique class of lipid mediators with an anti-inflammatory effect. In response to Ca2+ signaling, cPLA2ε translocates to phosphatidylserine-rich organelle membranes in the endocytic/recycling pathway. In vivo, cPLA2ε is induced in keratinocytes of psoriatic skin, and its genetic deletion exacerbates psoriatic inflammation due to a marked reduction of NAE-related lipids. cPLA2ε also contributes to NAE generation in several if not all mouse tissues. Thus, the two members of the cPLA2 family, cPLA2α and cPLA2ε, catalyze distinct enzymatic reactions to mobilize distinct sets of lipid mediators, thereby differently regulating pathophysiological events in health and disease. Such segregation of the cPLA2α-eicosanoid and cPLA2ε-NAE pathways represents a new paradigm of research on PLA2s and lipid mediators.
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Affiliation(s)
- Makoto Murakami
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
| | - Rina Takamiya
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoshimi Miki
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Nao Sugimoto
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yuki Nagasaki
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Department of Nutritional Science, Okayama Prefectural University, 111 Kuboki, Soja, Okayama 719-1197, Japan
| | - Toshiko Suzuki-Yamamoto
- Department of Nutritional Science, Okayama Prefectural University, 111 Kuboki, Soja, Okayama 719-1197, Japan
| | - Yoshitaka Taketomi
- Laboratory of Microenvironmental and Metabolic Health Science, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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Di T, Zhai C, Zhao J, Wang Y, Chen Z, Li P. Taxifolin inhibits keratinocyte proliferation and ameliorates imiquimod-induced psoriasis-like mouse model via regulating cytoplasmic phospholipase A2 and PPAR-γ pathway. Int Immunopharmacol 2021; 99:107900. [PMID: 34233233 DOI: 10.1016/j.intimp.2021.107900] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 06/01/2021] [Accepted: 06/15/2021] [Indexed: 12/29/2022]
Abstract
Psoriasis is a skin disease with autoimmune tendency, and taxifolin is an effective flavonoid with anti-inflammatory activity. It has been reported that taxifolin alleviates psoriatic dermatitis, but the detailed regulatory mechanism of keratinocyte proliferation is unclear. In this study, we revealed the mechanism of taxifolin on imiquimod-induced inflammatory infiltration and keratinocyte over-proliferation. Our results show that taxifolin prevented proliferation cycle of keratinocyte in a concentration-dependent manner. Over-proliferation and abnormal apoptosis of epidermal cells were obvious in the mouse model of psoriasis induced by imiquimod. Taxifolin treatment improved erythema and scales of psoriatic lesions in mice, and reduced the proportion of CD3 + cells, especially γδT cells, in lesions and thymus. Therefore, taxifolin decreased the expression level of IL-17A-dominated inflammatory cytokines. Proteomic analysis showed that 30 up-regulated proteins and 23 down-regulated proteins were compared with the lesions before and after the treatment with taxifolin. Among them, cytoplasmic phospholipase A2 (cPLA2), the key enzyme of the pro-inflammatory mediator, was the most significantly down-regulated protein. And enriched KEGG pathway shown that PPAR-γ pathway was most involved. Taxifolin significantly reduced p-cPLA2 and increased PPAR-γ protein level in keratinocytes and lesions induced by IL-17 and imiquimod respectively. Meanwhile, phosphorylation of ERK and P-38 were also inhibited. These results suggest that taxifolin prevented imiquimode-induced excessive immune activation and keratinocyte proliferation by decreasing p-cPLA2 and regulating the PPAR-γ pathway. Our study provides new insights into the cellular regulatory mechanisms of taxifolin in psoriasis.
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Affiliation(s)
- Tingting Di
- Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, Beijing Institute of Traditional Chinese Medicine, Beijing, China
| | - Chunyan Zhai
- Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, Beijing Institute of Traditional Chinese Medicine, Beijing, China
| | - Jingxia Zhao
- Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, Beijing Institute of Traditional Chinese Medicine, Beijing, China
| | - Yan Wang
- Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, Beijing Institute of Traditional Chinese Medicine, Beijing, China
| | - Zhaoxia Chen
- Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, Beijing Institute of Traditional Chinese Medicine, Beijing, China
| | - Ping Li
- Beijing Hospital of Traditional Chinese Medicine, Capital Medical University, Beijing Institute of Traditional Chinese Medicine, Beijing, China.
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Zhai L, Huang T, Xiao HT, Wu PG, Lin CY, Ning ZW, Zhao L, Kwan HYA, Hu XJ, Wong HLX, Li XQ, Bian ZX. Berberine Suppresses Colonic Inflammation in Dextran Sulfate Sodium-Induced Murine Colitis Through Inhibition of Cytosolic Phospholipase A2 Activity. Front Pharmacol 2021; 11:576496. [PMID: 33658925 PMCID: PMC7919193 DOI: 10.3389/fphar.2020.576496] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 10/08/2020] [Indexed: 12/16/2022] Open
Abstract
Ulcerative colitis (UC) causes chronic inflammation and damage to the colonic mucosal layer. Recent studies have reported significant changes in phosphatidylcholine (PC) and lysophosphatidylcholine (LPC) in UC patients and oral administration of PC has considerable therapeutic effects against UC, suggesting the metabolism of phosphatidylcholine may be involved in the UC development. Our previous work has demonstrated that berberine effectively suppresses inflammation and protects colonic mucosa injury in DSS-induced colitic mice. However, whether the therapeutic effects of berberine are attributed to its action on the PC metabolism remains unknown. In the present study, we have shown that berberine significantly reduces the lysophosphatidylcholine (LPC) levels in the sera of DSS-induced experimental colitis mice and LPS-stimulated macrophage RAW 264.7 cells. The cytosolic phospholipase A2a (PLA2G4A), an enzyme for hydrolyzing PC to LPC, was found to be up-regulated in the colon tissue of experimental colitis mice and inflamed macrophage RAW 264.7 cells. We then demonstrated berberine inhibits the phosphorylation of cytosolic phospholipase A2a (PLA2G4A) in the colon tissue of experimental colitis mice and inflamed macrophage RAW 264.7 cells. Subsequently, we revealed berberine suppressed the expression of pro-inflammatory factors including TNF-alpha and IL-6 through regulating PLA2G4A dysfunction in macrophage RAW 264.7 cells. Mechanistically, we found that berberine directly binds to PLA2G4A and inhibits MAPK/JNK signaling pathway to inhibit PLA2G4A activity in inflammatory status. Therefore, we concluded that berberine inhibits colonic PLA2G4A activity to ameliorate colonic inflammation in experimental colitic mice, suggesting modulation of the PC metabolism via PLA2G4A might be beneficial for establishing new therapies strategy for UC.
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Affiliation(s)
- Lixiang Zhai
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon, Hong Kong
| | - Tao Huang
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon, Hong Kong
| | - Hai-Tao Xiao
- School of Pharmacy, Health Science Center, Shenzhen University, Shenzhen, China
| | - Pei-Gen Wu
- School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang, China
| | - Cheng-Yuan Lin
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon, Hong Kong
| | - Zi-Wan Ning
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon, Hong Kong
| | - Ling Zhao
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon, Hong Kong
| | - Hiu Yee Anna Kwan
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon, Hong Kong
| | - Xian-Jing Hu
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon, Hong Kong
| | | | - Xian-Qian Li
- School of Pharmacy, Health Science Center, Shenzhen University, Shenzhen, China
| | - Zhao-Xiang Bian
- School of Chinese Medicine, Hong Kong Baptist University, Kowloon, Hong Kong.,Shenzhen Research Institute and Continuing Education, Hong Kong Baptist University, Shenzhen, China
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7
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Sales TA, Marcussi S, Ramalho TC. Current Anti-Inflammatory Therapies and the Potential of Secretory Phospholipase A2 Inhibitors in the Design of New Anti-Inflammatory Drugs: A Review of 2012 - 2018. Curr Med Chem 2020; 27:477-497. [PMID: 30706775 DOI: 10.2174/0929867326666190201120646] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 11/12/2018] [Accepted: 12/11/2018] [Indexed: 01/30/2023]
Abstract
The inflammatory process is a natural self-defense response of the organism to damage agents and its action mechanism involves a series of complex reactions. However, in some cases, this process can become chronic, causing much harm to the body. Therefore, over the years, many anti-inflammatory drugs have been developed aiming to decrease the concentrations of inflammatory mediators in the organism, which is a way of controlling these abnormal chain reactions. The main target of conventional anti-inflammatory drugs is the cyclooxygenase (COX) enzyme, but its use implies several side effects. Thus, based on these limitations, many studies have been performed, aiming to create new drugs, with new action mechanisms. In this sense, the phospholipase A2 (PLA2) enzymes stand out. Among all the existing isoforms, secretory PLA2 is the major target for inhibitor development, since many studies have proven that this enzyme participates in various inflammatory conditions, such as cancer, Alzheimer and arthritis. Finally, for the purpose of developing anti-inflammatory drugs that are sPLA2 inhibitors, many molecules have been designed. Accordingly, this work presents an overview of inflammatory processes and mediators, the current available anti-inflammatory drugs, and it briefly covers the PLA2 enzymes, as well as the diverse structural array of the newest sPLA2 inhibitors as a possible target for the production of new anti-inflammatory drugs.
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Affiliation(s)
- Thais A Sales
- Molecular Modeling Laboratory, Chemistry Department, Federal University of Lavras, 37200-000 Lavras, Brazil
| | - Silvana Marcussi
- Biochemistry Laboratory, Chemistry Department, Federal University of Lavras, 37200-000 Lavras, Brazil
| | - Teodorico C Ramalho
- Molecular Modeling Laboratory, Chemistry Department, Federal University of Lavras, 37200-000 Lavras, Brazil.,Center for Basic and Applied Research, Faculty of Informatics and Management, University of Hradec Kralove, 62, 50003 Rokitanskeho, Czech Republic
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8
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Kulminskaya N, Oberer M. Protein-protein interactions regulate the activity of Adipose Triglyceride Lipase in intracellular lipolysis. Biochimie 2020; 169:62-68. [DOI: 10.1016/j.biochi.2019.08.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 08/06/2019] [Indexed: 12/31/2022]
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9
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Hirano Y, Gao YG, Stephenson DJ, Vu NT, Malinina L, Simanshu DK, Chalfant CE, Patel DJ, Brown RE. Structural basis of phosphatidylcholine recognition by the C2-domain of cytosolic phospholipase A 2α. eLife 2019; 8:e44760. [PMID: 31050338 PMCID: PMC6550875 DOI: 10.7554/elife.44760] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 05/03/2019] [Indexed: 01/19/2023] Open
Abstract
Ca2+-stimulated translocation of cytosolic phospholipase A2α (cPLA2α) to the Golgi induces arachidonic acid production, the rate-limiting step in pro-inflammatory eicosanoid synthesis. Structural insights into the cPLA2α preference for phosphatidylcholine (PC)-enriched membranes have remained elusive. Here, we report the structure of the cPLA2α C2-domain (at 2.2 Å resolution), which contains bound 1,2-dihexanoyl-sn-glycero-3-phosphocholine (DHPC) and Ca2+ ions. Two Ca2+ are complexed at previously reported locations in the lipid-free C2-domain. One of these Ca2+ions, along with a third Ca2+, bridges the C2-domain to the DHPC phosphate group, which also interacts with Asn65. Tyr96 plays a key role in lipid headgroup recognition via cation-π interaction with the PC trimethylammonium group. Mutagenesis analyses confirm that Tyr96 and Asn65 function in PC binding selectivity by the C2-domain and in the regulation of cPLA2α activity. The DHPC-binding mode of the cPLA2α C2-domain, which differs from phosphatidylserine or phosphatidylinositol 4,5-bisphosphate binding by other C2-domains, expands and deepens knowledge of the lipid-binding mechanisms mediated by C2-domains.
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Affiliation(s)
- Yoshinori Hirano
- Structural Biology ProgramMemorial Sloan-Kettering Cancer CenterNew YorkUnited States
- Graduate School of Biological SciencesNara Institute of Science and Technology (NAIST)TakayamaJapan
| | - Yong-Guang Gao
- Hormel InstituteUniversity of MinnesotaAustinUnited States
| | - Daniel J Stephenson
- Department of Biochemistry and Molecular BiologyVirginia Commonwealth University Medical CenterRichmondUnited States
- Department of Cell Biology, Microbiology and Molecular BiologyUniversity of South FloridaTampaUnited States
| | - Ngoc T Vu
- Department of Biochemistry and Molecular BiologyVirginia Commonwealth University Medical CenterRichmondUnited States
| | - Lucy Malinina
- Hormel InstituteUniversity of MinnesotaAustinUnited States
| | - Dhirendra K Simanshu
- Structural Biology ProgramMemorial Sloan-Kettering Cancer CenterNew YorkUnited States
| | - Charles E Chalfant
- Department of Cell Biology, Microbiology and Molecular BiologyUniversity of South FloridaTampaUnited States
- Research ServiceJames A. Haley Veterans HospitalTampaUnited States
- The Moffitt Cancer CenterTampaUnited States
| | - Dinshaw J Patel
- Structural Biology ProgramMemorial Sloan-Kettering Cancer CenterNew YorkUnited States
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