Figure 1.

Sequence comparison of the ROP1 GTPase of Arabidopsis thalina (AtROP1) with the Homo sapiens Rho-type GTPases HsRhoA, HsRac1, and HsCdc42. The evolutionarily conserved AGC kinase phosphorylation site overlapping with the phosphorylation consensus site of plant-specific calcium-dependent protein kinases (CPKs) is indicated above the underlined corresponding sequence of the G-proteins. Conserved Arg residues surrounding the phosphorylation site S74 of AtROP1 are highlighted in blue. The less-conserved Rho-insert region is boxed. The conserved C-terminal CAAX motif is also indicated. * indicates evolutionary conserved residues.