>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=99.42 E-value=6.1e-13 Score=109.57 Aligned_cols=133 Identities=22% Similarity=0.287 Sum_probs=92.9 Q ss_pred CCEEEECCCCCCHHHHHHHHHCCHHCCCCCCCCC-CEEECCCCCCCCC--EEEEEEECCHHCCCCHHHHHHHHHHHHHHH Q ss_conf 3024311466318889999855200023454687-2110001245683--589995081000241035666678889985 Q gi|254780809|r 220 YKIVILGHSNAGKSSLFNALAKKDVAIVTDIPGT-TRDVLTIDLDLEG--YLVKISDTAGIRETDDIVEKEGIKRTFLEV 296 (440) Q Consensus 220 ~~v~i~G~pN~GKSSL~N~L~~~~~aIVs~~~GT-TRD~i~~~~~i~g--~~~~l~DTaGir~t~d~IE~~GI~ra~~~i 296 (440) T Consensus 1 ~KivvvG~~~vGKTsli~r~~~~~f--~~~~~~ti~~~~~~~~~~~~~~~~~l~iwDt~g~~~~~~~--------~~~~~ 70 (161) T cd01863 1 LKILLIGDSGVGKSSLLLRFTDDTF--DPDLAATIGVDFKVKTLTVDGKKVKLAIWDTAGQERFRTL--------TSSYY 70 (161) T ss_pred CEEEEECCCCCCHHHHHHHHHHCCC--CCCCCCCCCCCCEEEEEEECCEEEEEEEEECCCCCCCCCC--------HHHHH T ss_conf 9899999799579999999963999--9984873133423899999999999999999998423534--------22441 Q ss_pred HHHCCEEECCCCCCHHHHHHH-------------CCCCCCCCCCCCCCCCCCCHH------------HHHHHHHHHHHHH Q ss_conf 030110201358985663431-------------289853222233344654200------------0001333323235 Q gi|254780809|r 297 ENADLILLLKEINSKKEISFP-------------KNIDFIFIGTKSDLYSTYTEE------------YDHLISSFTGEGL 351 (440) Q Consensus 297 ~~aDlil~v~D~~~~~~~~~~-------------~~~~~i~V~NK~Dl~~~~~~~------------~~~~ISaktg~Gi 351 (440) T Consensus 71 ~~a~~~ilvfd~~~~~Sf~~i~~~~~~i~~~~~~~~~~~ilVgnK~D~~~~~v~~~~~~~~a~~~~~~y~e~Sak~g~nV 150 (161) T cd01863 71 RGAQGVILVYDVTRRDTFTNLETWLNELETYSTNNDIVKMLVGNKIDKENREVTREEGLKFARKHNMLFIETSAKTRDGV 150 (161) T ss_pred HHCCEEEEEEECCCHHHHHHHHHHHHHHHHHCCCCCCEEEEEEECCCCCCCCCCHHHHHHHHHHCCCEEEEECCCCCCCH T ss_conf 32153489976782656999999999999856888873788731044000689999999999986999999715868159 Q ss_pred HHHHHHHHHHH Q ss_conf 89999999996 Q gi|254780809|r 352 EELINKIKSIL 362 (440) Q Consensus 352 ~~L~~~I~~~l 362 (440) T Consensus 151 ~~~F~~l~~~i 161 (161) T cd01863 151 QQAFEELVEKI 161 (161) T ss_pred HHHHHHHHHHC T ss_conf 99999999709

HHsearch alignment for GI: 254780809 and conserved domain: cd01863