Rab GTPases constitute the largest family of small GTP-binding proteins that act as molecular switches in regulating vesicular transport in eukaryotic cells. LepB is a Rab GTPase-activating protein (GAP) effector found in Legionella pneumophila. This entry represents the N-terminal domain which is followed by a GAP domain [1].

1: Structural analyses of Legionella LepB reveal a new GAP fold that catalytically mimics eukaryotic RasGAP. Yu Q, Hu L, Yao Q, Zhu Y, Dong N, Wang DC, Shao F; Cell Res. 2013;23:775-787. PMID:23588383