ReviewStructural Biology

Signal Activation and Inactivation by the Gα Helical Domain: A Long-Neglected Partner in G Protein Signaling

Sci. Signal.  29 May 2012:
Vol. 5, Issue 226, pp. re2
DOI: 10.1126/scisignal.2003013

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Abstract

Heterotrimeric guanine nucleotide–binding proteins (G proteins) are positioned at the top of many signal transduction pathways. The G protein α subunit is composed of two domains, one that resembles Ras and another that is composed entirely of α helices. Historically most attention has focused on the Ras-like domain, but emerging evidence reveals that the helical domain is an active participant in G protein signaling.

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