Small G protein signaling modulator 2

Definition:

Possesses GTPase activator activity towards RAB32, RAB33B and RAB38. Regulates the trafficking of melanogenic enzymes TYR, TYRP1 and DCT/TYRP2 to melanosomes in melanocytes by inactivating RAB32 and RAB38. Inhibits RAB32 and RAB38 activation both directly by promoting their GTPase activity and indirectly by disrupting the RAB9A-HPS4 interaction which is required for RAB32/38 activation.

References:

[1]. Ryan M Nottingham, et al. RUTBC1 protein, a Rab9A effector that activates GTP hydrolysis by Rab32 and Rab33B proteins. J Biol Chem. 2011 Sep 23;286(38):33213-22. [Content Brief]

[2]. Soujiro Marubashi, et al. RUTBC1 Functions as a GTPase-activating Protein for Rab32/38 and Regulates Melanogenic Enzyme Trafficking in Melanocytes. J Biol Chem. 2016 Jan 15;291(3):1427-40. [Content Brief]

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