Protein
Rac-like GTP-binding protein ARAC3
Organism
Arabidopsis thaliana
Function
Inactive GDP-bound Rho GTPases reside in the cytosol, are found in a complex with Rho GDP-dissociation inhibitors (Rho GDIs), and are released from the GDI protein in order to translocate to membranes upon activation. May be involved in cell polarity control during the actin-dependent tip growth of root hairs (PubMed:11387211). SPK1-dependent activation is required for auxin-mediated inhibition of PIN2 internalization during gravitropic responses (PubMed:22683260).
Similarity
Belongs to the small GTPase superfamily. Rho family.
Sequence
MSASRFIKCVTVGDGAVGKTCLLISYTSNTFPTDYVPTVFDNFSANVIVDGNTINLGLWDTAGQEDYNRLRPLSYRGADVFLLAFSLVSKASYENVSKKWVPELRHYAPGVPIILVGTKLDLRDDKQFFAEHPGAVPISTAQGEELKKLIGAPAYIECSAKTQQNVKAVFDAAIKVVLQPPKNKKKKKRKSQKGCSIL