>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=98.99 E-value=1.4e-09 Score=78.47 Aligned_cols=142 Identities=18% Similarity=0.147 Sum_probs=85.0 Q ss_pred EEEEEEECCCCCHHHHHHHHHHHHHHHHHCCCCCCCCHHHHHCCCEEEEE--EEEEECCCEEEEEEECCCCHHHHHHHHH Q ss_conf 79999904689887899999987644420013126868698629206378--9998219908999847873024677987 Q gi|254780150|r 13 LGLSTIGHVDHGKTTLTAAITKYYSEEKKEYGDIDSAPEEKLRGITIATA--HVSYETDKRFYSHIDCPGHADYVKNMIT 90 (392) Q Consensus 13 ~ni~~iGhvd~GKSTL~~~L~~~~~~~~~~~~~~D~~~~E~~rGiTi~~~--~~~~~~~~~~i~iiD~PGH~~f~~~mi~ 90 (392) T Consensus 1 ~KivvvG~~~vGKTsli~r~~~~------------~f~~~~~~ti~~~~~~~~~~~~~~~~~l~iwDt~g~~~~~~~~~~ 68 (161) T cd01863 1 LKILLIGDSGVGKSSLLLRFTDD------------TFDPDLAATIGVDFKVKTLTVDGKKVKLAIWDTAGQERFRTLTSS 68 (161) T ss_pred CEEEEECCCCCCHHHHHHHHHHC------------CCCCCCCCCCCCCCEEEEEEECCEEEEEEEEECCCCCCCCCCHHH T ss_conf 98999997995799999999639------------999984873133423899999999999999999998423534224 Q ss_pred HHHCCCCEEEEECCCCCCCCCHHHHH-HHHHHC----CCCCEEEEECCCCCCCCHHHHHHCCCCCCEEEEEEEEEEEEEC Q ss_conf 74002331452012344332106778-888631----8760233100233356122211012321001110145322102 Q gi|254780150|r 91 GATQADGAILVCAAEDGPKPQTREHI-LLARQI----GISSIVVYMNKVDAVDDDELLDISEYEIRDLLKEHKYSDDTPI 165 (392) Q Consensus 91 g~~~~D~ailvVda~~G~~~QT~eh~-~l~~~l----gi~~iIv~iNKmD~v~~~~~~~~i~~~i~~~l~~~~~~~~~pi 165 (392) T Consensus 69 ~~~~a~~~ilvfd~~~~~Sf~~i~~~~~~i~~~~~~~~~~-~ilVgnK~D~~~~~----v~~~~~~~~a~~~----~~~y 139 (161) T cd01863 69 YYRGAQGVILVYDVTRRDTFTNLETWLNELETYSTNNDIV-KMLVGNKIDKENRE----VTREEGLKFARKH----NMLF 139 (161) T ss_pred HHHHCCEEEEEEECCCHHHHHHHHHHHHHHHHHCCCCCCE-EEEEEECCCCCCCC----CCHHHHHHHHHHC----CCEE T ss_conf 4132153489976782656999999999999856888873-78873104400068----9999999999986----9999 Q ss_pred CCCEEEEEEE Q ss_conf 3311467641 Q gi|254780150|r 166 IRGSALCALQ 175 (392) Q Consensus 166 i~~sa~~g~~ 175 (392) T Consensus 140 ~e~Sak~g~n 149 (161) T cd01863 140 IETSAKTRDG 149 (161) T ss_pred EEECCCCCCC T ss_conf 9971586815

HHsearch alignment for GI: 254780150 and conserved domain: cd01863