>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=93.82 E-value=0.18 Score=29.64 Aligned_cols=85 Identities=15% Similarity=0.227 Sum_probs=50.0 Q ss_pred EEEECCCCCCHHHHHHHHHHHHCCCCCCCCCCCHHHHH---HHCCCCCCEEEEEEECCCCHHHHHCCCHHHHCC--CCEE Q ss_conf 99987878688999999997607888530245202011---003788608999865178977753058367508--9789 Q gi|254780824|r 36 LTLSGDLGSGKSFLARSIIRFLMHDDALEVLSPTFTLV---QLYDASIPVAHFDFYRLSSHQEVVELGFDEILN--ERIC 110 (162) Q Consensus 36 i~L~GdLGaGKTtfvr~i~~~lg~~~~~~V~SPTF~l~---~~Y~~~~~i~H~DlYRL~~~~E~~~lg~~e~~~--~~i~ 110 (162) T Consensus 3 IvllGd~~VGKTsli~r~~~~~f~~----~~~~Tig~~~~~k~v~~~~~~i~l~iwDtaGqe~~~~~-~~~y~r~a~~~i 77 (161) T cd04117 3 LLLIGDSGVGKTCLLCRFTDNEFHS----SHISTIGVDFKMKTIEVDGIKVRIQIWDTAGQERYQTI-TKQYYRRAQGIF 77 (161) T ss_pred EEEECCCCCCHHHHHHHHHCCCCCC----CCCCCCEEEEEEEEEEECCEEEEEEEEECCCCCCCCCC-HHHHHHHHCEEE T ss_conf 9999949985899999994299899----87887208988999999999999999979996023635-588876416889 Q ss_pred EE-------------ECHHHHHCCCCCC Q ss_conf 99-------------9855632049954 Q gi|254780824|r 111 II-------------EWPEIGRSLLPKK 125 (162) Q Consensus 111 lI-------------EWpe~~~~~lp~~ 125 (162) T Consensus 78 lvyDvt~~~Sf~~l~~w~~~i~~~~~~~ 105 (161) T cd04117 78 LVYDISSERSYQHIMKWVSDVDEYAPEG 105 (161) T ss_pred EECCCCCHHHHHHHHHHHHHHHHHCCCC T ss_conf 9614898899999999999999878998

HHsearch alignment for GI: 254780824 and conserved domain: cd04117