The effect of inositol 1,4,5-trisphosphate and GTP on calcium release from rat liver microsomes. - Suppr | 超能文献

The effect of inositol 1,4,5-trisphosphate and GTP on calcium release from rat liver microsomes.

作者信息

Lukács G L, Hajnóczky G, Hunyady L, Spät A

机构信息

Department of Physiology, Semmelweis University Medical School, Budapest, Hungary.

出版信息

Biochim Biophys Acta. 1987 Nov 12;931(2):251-4. doi: 10.1016/0167-4889(87)90213-8.

DOI:10.1016/0167-4889(87)90213-8

Abstract

Inositol 1,4,5-trisphosphate (Ins(1,4,5)P3) and GTP mobilized 8% and 90% of the ionophore-releaseable Ca2+ pool from rat liver microsomes, respectively. In contrast to GTP, which acted after a lag-time, the Ins(1,4,5)P3-induced Ca2+ release was immediate. Poly(ethylene glycol) inhibited the effect of Ins(1,4,5)P3 and enhanced that of GTP. Ins(1,4,5)P3 accelerated and enhanced the GTP-induced Ca2+ release. Guanylyl imidodiphosphate inhibited competitively the GTP stimulated Ca2+ release, but not the GTP-dependent phosphorylation of the Mr 17,000 and 38,000 protein bands.

摘要

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