کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2049997 | 1074150 | 2008 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Calcium-induced tripartite binding of intrinsically disordered calpastatin to its cognate enzyme, calpain Calcium-induced tripartite binding of intrinsically disordered calpastatin to its cognate enzyme, calpain](/preview/png/2049997.png)
The activity of calpain is controlled by the free intracellular calcium level and by the protein’s intrinsically disordered endogenous inhibitor, calpastatin, mediated by short conserved segments: subdomains A–C. The exact binding mode of calpastatin to the enzyme has until now been unclear. Our NMR data of the 141 amino acid long inhibitor, with and without calcium and calpain, have revealed structural changes and a tripartite binding mode, in which the disordered inhibitor wraps around, and contacts, the enzyme at three points, facilitated by flexible linkers. This unprecedented binding mode permits a unique combination of specificity, speed and binding strength in regulation.Structured summaryMINT-6549073:Calpain-2 catalytic subunit (uniprotkb:P04632), Calpain-2 catalytic subunit (uniprotkb:P17655) and calpastatin (uniprotkb:P20810) physically interact (MI:0218) by nuclear magnetic resonance (MI:0077)
Journal: FEBS Letters - Volume 582, Issue 15, 25 June 2008, Pages 2149–2154