Reactome | G beta:gamma signalling through CDC42

G beta:gamma signalling through CDC42

Stable Identifier

R-HSA-8964616

Type

Pathway

Species

Homo sapiens

Compartment

plasma membrane, cytosol

ReviewStatus

5/5

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G-Protein Coupled Receptors (GPCR) sense extracellular signals and activate different Guanine nucleotide binding proteins (G-proteins) that have alpha, beta and gamma subunits. Upon activation, the alpha subunit of G-proteins dissociates from beta-gamma and the both are then free to regulate downstream effectors. Serine/threonine-protein kinase PAK 1 binds with Rho guanine nucleotide exchange factor 6 (ARHGEF6, PIX-Alpha) in the cytosol and is subsequently translocated by the G-protein beta-gamma complex to the plasma membrane. Here, ARHGEF6 activates Cell division control protein 42 homolog (CDC42) by acting as a GEF. Once active, CDC42 can facilitate the activation of PAK1. CDC42 is known to be involved in epithelial cell polarization processes.

Literature References

PubMed ID	Title	Journal	Year
12887923	Directional sensing requires G beta gamma-mediated PAK1 and PIX alpha-dependent activation of Cdc42 Li, Z, Hannigan, M, Mo, Z, Liu, B, Lu, W, Wu, Y, Smrcka, AV, Wu, G, Li, L, Liu, M, Huang, CK, Wu, D	Cell	2003