Does the ternary complex act as a secondary proton pump and a GTP synthase?

Abstract:

:It has been suggested that G protein-coupled receptors can act as proton transporters, with the activated G protein-coupled receptor transporting H+ across the membrane from the extracellular side to the cytoplasm. In this article, Paul Nederkoorn, Henk Timmerman and Gabriëlle Donné-Op den Kelder summarize the various H+ translocation mechanisms and how these compare with activated G protein-coupled receptors. The G protein, being part of the ternary complex, is proposed to use translocated protons to synthesize GTP from GDP and Pi, thus functioning in a similar manner to ATP synthase. The importance of these events in physiological effects such as signal amplification is discussed.

journal_name

Trends Pharmacol Sci

authors

Nederkoorn PH,Timmerman H,Donné-Op den Kelder GM

doi

10.1016/s0165-6147(00)89008-2

subject

Has Abstract

pub_date

1995-05-01 00:00:00

pages

156-61

issue

5

eissn

0165-6147

issn

1873-3735

pii

S0165614700890082

journal_volume

16

pub_type

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