Phosphatidylinositol-3,4,5-trisphosphat 3-phosphatase
Phosphatidylinositol-3,4,5-trisphosphat 3-phosphatase
En phosphatidylinositol-3,4,5-triphosphat 3-phosphatase er en hydrolase , som katalyserer den følgende reaktion :
phosphatidylinositol-3,4,5-triphosphat +
H 2 O ⇌{\ displaystyle \ rightleftharpoons} phosphatidylinositol-4,5-bisphosphat +
phosphat .
Dette enzym bruger kationen af magnesium Mg 2+ som kofaktor . Den PTEN protein , der spiller en rolle i cancer forebyggelse , har phosphatidylinositol-3,4,5-triphosphat 3-phosphataseaktivitet.
Noter og referencer
-
(in) Yukihito Kabuyama Noriyuki Nakatsu, Yoshimi Homma og Yasuhisa Fukui , " Oprensning og karakterisering af phosphatidylinositol-3,4,5-triphosphatphosphatase i Bovine Thymus " , The FEBS Journal , vol. 238, nr . 2
Juni 1996, s. 350-356 ( PMID 8681945 , DOI 10.1111 / j.1432-1033.1996.0350z.x , læs online )
-
(i) Tomohiko Maehama og Jack E. Dixon , " tumorsuppressoren, PTEN / MMAC1, dephosphoryleret lipid Second Messenger, phosphatidylinositol 3,4,5-triphosphat " , Journal of Biological Chemistry , vol. 273, nr . 22,
29. maj 1998, s. 13375-13378 ( PMID 9593664 , DOI 10.1074 / jbc.273.22.13375 , læs online )
<img src="https://fr.wikipedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" title="" width="1" height="1" style="border: none; position: absolute;">