SmLMWPTP, a teleost low molecular weight protein tyrosine phosphatase, inhibits the immune response of peripheral blood leukocytes in a manner that depends on the conserved P-loop
Protein tyrosine phosphatases (PTPs) are a family of enzymes that play a key role in cellular signal transduction. Low molecular weight PTPs (LMWPTPs) are a subfamily of PTPs that are characterized by the presence of a conserved phosphate-binding loop (P-loop) with the signature sequence of (V/I)CXG...
Published in: | Developmental & Comparative Immunology |
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/16521 2023-05-15T18:15:44+02:00 SmLMWPTP, a teleost low molecular weight protein tyrosine phosphatase, inhibits the immune response of peripheral blood leukocytes in a manner that depends on the conserved P-loop Zhang, Jian Chen, Ling Sun, Li Sun, L 2013-06-01 http://ir.qdio.ac.cn/handle/337002/16521 https://doi.org/10.1016/j.dci.2013.03.001 英语 eng DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY Zhang, Jian; Chen, Ling; Sun, Li.SmLMWPTP, a teleost low molecular weight protein tyrosine phosphatase, inhibits the immune response of peripheral blood leukocytes in a manner that depends on the conserved P-loop,DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY,2013,40(2):103-111 http://ir.qdio.ac.cn/handle/337002/16521 doi:10.1016/j.dci.2013.03.001 6 Protein Tyrosine Phosphatase Scophthalmus Maximus Immune Regulation Phagocytosis Immunology Zoology Science & Technology Life Sciences & Biomedicine PHOSPHOTYROSINE PHOSPHATASE CRYSTAL-STRUCTURE SCOPHTHALMUS-MAXIMUS LMW-PTP EXPRESSION GROWTH STIMULATION DEPHOSPHORYLATION PHOSPHORYLATION INACTIVATION Article 期刊论文 2013 ftchinacasciocas https://doi.org/10.1016/j.dci.2013.03.001 2022-06-27T05:35:36Z Protein tyrosine phosphatases (PTPs) are a family of enzymes that play a key role in cellular signal transduction. Low molecular weight PTPs (LMWPTPs) are a subfamily of PTPs that are characterized by the presence of a conserved phosphate-binding loop (P-loop) with the signature sequence of (V/I)CXGNXCRS. To date, very little study on teleost LMWPTPs has been documented, and, as a result, the function of LMWPTPs in fish is essentially unknown. In this study, we identified a LMWPTP from turbot (Scophthalmus maximus) and examined its biological activity and functionality. The turbot LMWPTP (SmLMWPTP) is composed of 158 residues and possesses a typical P-loop sequence in the form of (12)VCLGNICRS(20). Purified recombinant SmLMWPTP (rSmLMWPTP) exhibited apparent phosphatase activity, which was optimal at pH 5 and 50 degrees C. The activity of SmLMWPTP was abolished when C13 and, in particular, R19 of the P-loop were mutated. SmLMWPTP expression was detected in a wide range of tissues and upregulated by bacterial and viral infection. Subcellular localization analysis showed that SmLMWPTP was secreted by peripheral blood leukocytes (PBL) into the extracellular milieu. When PBL were treated with rSmLMWPTP, the cells exhibited significant reductions in (i) proliferative and respiratory burst activity, (ii) expression levels of multiple immune relevant genes, and (iii) phagocytic activity. In contrast, the mutant SmLMWPTP bearing R19 mutation had no effect on PBL activity. Taken together, these results indicate that SmLMWPTP is a secreted PTP that exerts a negative regulatory effect on the innate immune response of PBL in a manner that depends on the structural integrity of the P-loop. (C) 2013 Elsevier Ltd. All rights reserved. Protein tyrosine phosphatases (PTPs) are a family of enzymes that play a key role in cellular signal transduction. Low molecular weight PTPs (LMWPTPs) are a subfamily of PTPs that are characterized by the presence of a conserved phosphate-binding loop (P-loop) with the signature sequence of ... Article in Journal/Newspaper Scophthalmus maximus Turbot Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Developmental & Comparative Immunology 40 2 103 111 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
Protein Tyrosine Phosphatase Scophthalmus Maximus Immune Regulation Phagocytosis Immunology Zoology Science & Technology Life Sciences & Biomedicine PHOSPHOTYROSINE PHOSPHATASE CRYSTAL-STRUCTURE SCOPHTHALMUS-MAXIMUS LMW-PTP EXPRESSION GROWTH STIMULATION DEPHOSPHORYLATION PHOSPHORYLATION INACTIVATION |
spellingShingle |
Protein Tyrosine Phosphatase Scophthalmus Maximus Immune Regulation Phagocytosis Immunology Zoology Science & Technology Life Sciences & Biomedicine PHOSPHOTYROSINE PHOSPHATASE CRYSTAL-STRUCTURE SCOPHTHALMUS-MAXIMUS LMW-PTP EXPRESSION GROWTH STIMULATION DEPHOSPHORYLATION PHOSPHORYLATION INACTIVATION Zhang, Jian Chen, Ling Sun, Li Sun, L SmLMWPTP, a teleost low molecular weight protein tyrosine phosphatase, inhibits the immune response of peripheral blood leukocytes in a manner that depends on the conserved P-loop |
topic_facet |
Protein Tyrosine Phosphatase Scophthalmus Maximus Immune Regulation Phagocytosis Immunology Zoology Science & Technology Life Sciences & Biomedicine PHOSPHOTYROSINE PHOSPHATASE CRYSTAL-STRUCTURE SCOPHTHALMUS-MAXIMUS LMW-PTP EXPRESSION GROWTH STIMULATION DEPHOSPHORYLATION PHOSPHORYLATION INACTIVATION |
description |
Protein tyrosine phosphatases (PTPs) are a family of enzymes that play a key role in cellular signal transduction. Low molecular weight PTPs (LMWPTPs) are a subfamily of PTPs that are characterized by the presence of a conserved phosphate-binding loop (P-loop) with the signature sequence of (V/I)CXGNXCRS. To date, very little study on teleost LMWPTPs has been documented, and, as a result, the function of LMWPTPs in fish is essentially unknown. In this study, we identified a LMWPTP from turbot (Scophthalmus maximus) and examined its biological activity and functionality. The turbot LMWPTP (SmLMWPTP) is composed of 158 residues and possesses a typical P-loop sequence in the form of (12)VCLGNICRS(20). Purified recombinant SmLMWPTP (rSmLMWPTP) exhibited apparent phosphatase activity, which was optimal at pH 5 and 50 degrees C. The activity of SmLMWPTP was abolished when C13 and, in particular, R19 of the P-loop were mutated. SmLMWPTP expression was detected in a wide range of tissues and upregulated by bacterial and viral infection. Subcellular localization analysis showed that SmLMWPTP was secreted by peripheral blood leukocytes (PBL) into the extracellular milieu. When PBL were treated with rSmLMWPTP, the cells exhibited significant reductions in (i) proliferative and respiratory burst activity, (ii) expression levels of multiple immune relevant genes, and (iii) phagocytic activity. In contrast, the mutant SmLMWPTP bearing R19 mutation had no effect on PBL activity. Taken together, these results indicate that SmLMWPTP is a secreted PTP that exerts a negative regulatory effect on the innate immune response of PBL in a manner that depends on the structural integrity of the P-loop. (C) 2013 Elsevier Ltd. All rights reserved. Protein tyrosine phosphatases (PTPs) are a family of enzymes that play a key role in cellular signal transduction. Low molecular weight PTPs (LMWPTPs) are a subfamily of PTPs that are characterized by the presence of a conserved phosphate-binding loop (P-loop) with the signature sequence of ... |
format |
Article in Journal/Newspaper |
author |
Zhang, Jian Chen, Ling Sun, Li Sun, L |
author_facet |
Zhang, Jian Chen, Ling Sun, Li Sun, L |
author_sort |
Zhang, Jian |
title |
SmLMWPTP, a teleost low molecular weight protein tyrosine phosphatase, inhibits the immune response of peripheral blood leukocytes in a manner that depends on the conserved P-loop |
title_short |
SmLMWPTP, a teleost low molecular weight protein tyrosine phosphatase, inhibits the immune response of peripheral blood leukocytes in a manner that depends on the conserved P-loop |
title_full |
SmLMWPTP, a teleost low molecular weight protein tyrosine phosphatase, inhibits the immune response of peripheral blood leukocytes in a manner that depends on the conserved P-loop |
title_fullStr |
SmLMWPTP, a teleost low molecular weight protein tyrosine phosphatase, inhibits the immune response of peripheral blood leukocytes in a manner that depends on the conserved P-loop |
title_full_unstemmed |
SmLMWPTP, a teleost low molecular weight protein tyrosine phosphatase, inhibits the immune response of peripheral blood leukocytes in a manner that depends on the conserved P-loop |
title_sort |
smlmwptp, a teleost low molecular weight protein tyrosine phosphatase, inhibits the immune response of peripheral blood leukocytes in a manner that depends on the conserved p-loop |
publishDate |
2013 |
url |
http://ir.qdio.ac.cn/handle/337002/16521 https://doi.org/10.1016/j.dci.2013.03.001 |
genre |
Scophthalmus maximus Turbot |
genre_facet |
Scophthalmus maximus Turbot |
op_relation |
DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY Zhang, Jian; Chen, Ling; Sun, Li.SmLMWPTP, a teleost low molecular weight protein tyrosine phosphatase, inhibits the immune response of peripheral blood leukocytes in a manner that depends on the conserved P-loop,DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY,2013,40(2):103-111 http://ir.qdio.ac.cn/handle/337002/16521 doi:10.1016/j.dci.2013.03.001 |
op_rights |
6 |
op_doi |
https://doi.org/10.1016/j.dci.2013.03.001 |
container_title |
Developmental & Comparative Immunology |
container_volume |
40 |
container_issue |
2 |
container_start_page |
103 |
op_container_end_page |
111 |
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1766188934158614528 |