>cd01863 Rab18 Rab18 subfamily. Mammalian Rab18 is implicated in endocytic transport and is expressed most highly in polarized epithelial cells. However, trypanosomal Rab, TbRAB18, is upregulated in the BSF (Blood Stream Form) stage and localized predominantly to elements of the Golgi complex. In human and mouse cells, Rab18 has been identified in lipid droplets, organelles that store neutral lipids. GTPase activating proteins (GAPs) interact with GTP-bound Rab and accelerate the hydrolysis of GTP to GDP. Guanine nucleotide exchange factors (GEFs) interact with GDP-bound Rabs to promote the formation of the GTP-bound state. Rabs are further regulated by guanine nucleotide dissociation inhibitors (GDIs), which facilitate Rab recycling by masking C-terminal lipid binding and promoting cytosolic localization. Most Rab GTPases contain a lipid modification site at the C-terminus, with sequence motifs CC, CXC, or CCX. Lipid binding is essential for membrane attachment, a key feature of mos

Probab=94.13  E-value=0.16  Score=29.85  Aligned_cols=60  Identities=20%  Similarity=0.234  Sum_probs=33.9

Q ss_pred             EEEECCCCCCHHHHHHHHHHHHCCCCCCCCCCCHHHHH---HHCCCCCCEEEEEEECCCCHHHHHCC
Q ss_conf             99987878688999999997607888530245202011---00378860899986517897775305
Q gi|254780824|r   36 LTLSGDLGSGKSFLARSIIRFLMHDDALEVLSPTFTLV---QLYDASIPVAHFDFYRLSSHQEVVEL   99 (162)
Q Consensus        36 i~L~GdLGaGKTtfvr~i~~~lg~~~~~~V~SPTF~l~---~~Y~~~~~i~H~DlYRL~~~~E~~~l   99 (162)
T Consensus         3 ivvvG~~~vGKTsli~r~~~~~f~~~----~~~ti~~~~~~~~~~~~~~~~~l~iwDt~g~~~~~~~   65 (161)
T cd01863           3 ILLIGDSGVGKSSLLLRFTDDTFDPD----LAATIGVDFKVKTLTVDGKKVKLAIWDTAGQERFRTL   65 (161)
T ss_pred             EEEECCCCCCHHHHHHHHHHCCCCCC----CCCCCCCCCEEEEEEECCEEEEEEEEECCCCCCCCCC
T ss_conf             99999799579999999963999998----4873133423899999999999999999998423534