>cd04117 Rab15 Rab15 subfamily. Rab15 colocalizes with the transferrin receptor in early endosome compartments, but not with late endosomal markers. It codistributes with Rab4 and Rab5 on early/sorting endosomes, and with Rab11 on pericentriolar recycling endosomes. It is believed to function as an inhibitory GTPase that regulates distinct steps in early endocytic trafficking. 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 most Rab proteins. Due to

Probab=98.73 E-value=2.1e-08 Score=71.13 Aligned_cols=140 Identities=21% Similarity=0.209 Sum_probs=82.8 Q ss_pred EEEEEEECCCCCHHHHHHHHHHHHHHHHHCCCCCCCCHHHHHCCCEEEEEEEEEECCC--EEEEEEECCCCHHHHHHHHH Q ss_conf 7999990468988789999998764442001312686869862920637899982199--08999847873024677987 Q gi|254780263|r 13 LGLSTIGHVDHGKTTLTAAITKYYSEEKKEYGDIDSAPEEKLRGITIATAHVSYETDK--RFYSHIDCPGHADYVKNMIT 90 (392) Q Consensus 13 ~ni~~iGhvd~GKSTL~~~L~~~~~~~~~~~~~~D~~~~E~~rGiTi~~~~~~~~~~~--~~i~iiD~PGH~~f~~~mi~ 90 (392) T Consensus 1 ~KIvllGd~~VGKTsli~r~~~~------------~f~~~~~~Tig~~~~~k~v~~~~~~i~l~iwDtaGqe~~~~~~~~ 68 (161) T cd04117 1 FRLLLIGDSGVGKTCLLCRFTDN------------EFHSSHISTIGVDFKMKTIEVDGIKVRIQIWDTAGQERYQTITKQ 68 (161) T ss_pred CEEEEECCCCCCHHHHHHHHHCC------------CCCCCCCCCCEEEEEEEEEEECCEEEEEEEEECCCCCCCCCCHHH T ss_conf 98999994998589999999429------------989987887208988999999999999999979996023635588 Q ss_pred HHHCCCCEEEEECCCCCCCCCHHHHH----HHHHHC---CCCCEEEEECCCCCCCCHHHHHHCCCCCCEEEEEEEEEEEE Q ss_conf 74002331452012344332106778----888631---87602331002333561222110123210011101453221 Q gi|254780263|r 91 GATQADGAILVCAAEDGPKPQTREHI----LLARQI---GISSIVVYMNKVDAVDDDELLDISEYEIRDLLKEHKYSDDT 163 (392) Q Consensus 91 g~~~~D~ailvVda~~G~~~QT~eh~----~l~~~l---gi~~iIv~iNKmD~v~~~~~~~~i~~~i~~~l~~~~~~~~~ 163 (392) T Consensus 69 y~r~a~~~ilvyDvt~---~~Sf~~l~~w~~~i~~~~~~~~~-~ilVgNK~Dl~~~r~---v~~~~~~~~a~~~----~~ 137 (161) T cd04117 69 YYRRAQGIFLVYDISS---ERSYQHIMKWVSDVDEYAPEGVQ-KILIGNKADEEQKRQ---VGDEQGNKLAKEY----GM 137 (161) T ss_pred HHHHHCEEEEECCCCC---HHHHHHHHHHHHHHHHHCCCCCE-EEEEEECCCHHHCCC---CCHHHHHHHHHHC----CC T ss_conf 8764168899614898---89999999999999987899864-999873278786277---9999999999986----99 Q ss_pred ECCCCEEEEEEE Q ss_conf 023311467641 Q gi|254780263|r 164 PIIRGSALCALQ 175 (392) Q Consensus 164 pii~~sa~~g~~ 175 (392) T Consensus 138 ~~~etSAk~~~n 149 (161) T cd04117 138 DFFETSACTNSN 149 (161) T ss_pred EEEEECCCCCCC T ss_conf 799967789829

HHsearch alignment for GI: 254780263 and conserved domain: cd04117