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The cyclophilins
被引:528
作者:
Wang, P
[1
]
Heitman, J
机构:
[1] Louisiana State Univ, Hlth Sci Ctr, Childrens Hosp, Res Inst Children, New Orleans, LA 70118 USA
[2] Louisiana State Univ, Hlth Sci Ctr, Dept Pediat, New Orleans, LA 70118 USA
[3] Louisiana State Univ, Hlth Sci Ctr, Dept Microbiol Immunol & Parasitol, New Orleans, LA 70118 USA
[4] Duke Univ, Med Ctr, Dept Mol Genet & Microbiol, Durham, NC 27710 USA
[5] Duke Univ, Med Ctr, Dept Med, Durham, NC 27710 USA
[6] Duke Univ, Med Ctr, Dept Pharmacol & Canc Biol, Durham, NC 27710 USA
[7] Duke Univ, Med Ctr, Howard Hughes Med Inst, Durham, NC 27710 USA
关键词:
D O I:
10.1186/gb-2005-6-7-226
中图分类号:
Q81 [生物工程学(生物技术)];
Q93 [微生物学];
学科分类号:
071005 ;
0836 ;
090102 ;
100705 ;
摘要:
Cyclophilins ( Enzyme Commission (EC) number 5.1.2.8) belong to a group of proteins that have peptidyl-prolyl cis-trans isomerase activity; such proteins are collectively known as immunophilins and also include the FK-506-binding proteins and the parvulins. Cyclophilins are found in all cells of all organisms studied, in both prokaryotes and eukaryotes; humans have a total of 16 cyclophilin proteins, Arabidopsis up to 29 and Saccharomyces 8. The first member of the cyclophilins to be identified in mammals, cyclophilin A, is the major cellular target for, and thus mediates the actions of, the immunosuppressive drug cyclosporin A. Cyclophilin A forms a ternary complex with cyclosporin A and the calcium-calmodulin-activated serine/threonine-specific protein phosphatase calcineurin; formation of this complex prevents calcineurin from regulating cytokine gene transcription. Recent studies have implicated a diverse array of additional cellular functions for cyclophilins, including roles as chaperones and in cell signaling.
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