>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=99.65 E-value=1.6e-15 Score=120.31 Aligned_cols=152 Identities=21% Similarity=0.215 Sum_probs=99.2 Q ss_pred EEEEECCCCCCHHHHHHHHHCCCEEEECCCCCCE-EEEEEEEEEECC--EEEEEEECCCCHHHCCCCCCCCCCHHHHHHH Q ss_conf 8998338998688999998689202105888860-212789997399--4899998798401012357532100234555 Q gi|254780941|r 24 CVALVGATNAGKSTLVNRFVGAKVSIVTHKVQTT-RSIVRGIVSEKE--SQIVFLDTPGIFNAKDSYHKLMIRLSWSTIK 100 (311) Q Consensus 24 ~VaivG~pN~GKSTL~N~l~g~~vsivS~k~~TT-r~~i~gi~~~~~--~qiifvDTPG~~~~~~~l~~~~~~~~~~~l~ 100 (311) T Consensus 2 KIvllGd~~VGKTsli~r~~~~~f~~~-~~~-Tig~~~~~k~v~~~~~~i~l~iwDtaGq--------e~~~~~~~~y~r 71 (161) T cd04117 2 RLLLIGDSGVGKTCLLCRFTDNEFHSS-HIS-TIGVDFKMKTIEVDGIKVRIQIWDTAGQ--------ERYQTITKQYYR 71 (161) T ss_pred EEEEECCCCCCHHHHHHHHHCCCCCCC-CCC-CCEEEEEEEEEEECCEEEEEEEEECCCC--------CCCCCCHHHHHH T ss_conf 899999499858999999942998998-788-7208988999999999999999979996--------023635588876 Q ss_pred HHHHHCCCCHHHHHHHC-CHHHHHHHHH---HCCCCCEEEEEECCCHHHHHH-HHHHHHHHHCCCCCCCCCCCCCCCCCH Q ss_conf 53210011000010000-0001223454---428720257872110104345-788886410012334311000138742 Q gi|254780941|r 101 HADIVCLVVDSHRELKV-NIHDLLKEIA---KRSSRLILILNKIDCVKPERL-LEQAEIANKLVFIEKTFMVSATKGHGC 175 (311) Q Consensus 101 ~aDiil~VvDa~~~~~~-~~~~il~~l~---~~~~p~IiVlNKiDlv~~~~l-~~~~~~~~~~~~~~~i~~ISAk~g~Gi 175 (311) T Consensus 72 ~a~~~ilvyDvt~~~Sf~~l~~w~~~i~~~~~~~~~~ilVgNK~Dl~~~r~v~~~~~~~~a~~~~-~~~~etSAk~~~nV 150 (161) T cd04117 72 RAQGIFLVYDISSERSYQHIMKWVSDVDEYAPEGVQKILIGNKADEEQKRQVGDEQGNKLAKEYG-MDFFETSACTNSNI 150 (161) T ss_pred HHCEEEEECCCCCHHHHHHHHHHHHHHHHHCCCCCEEEEEEECCCHHHCCCCCHHHHHHHHHHCC-CEEEEECCCCCCCH T ss_conf 41688996148988999999999999998789986499987327878627799999999999869-97999677898298 Q ss_pred HHHHHHHHHHC Q ss_conf 67899999836 Q gi|254780941|r 176 DDVLNYLCSTL 186 (311) Q Consensus 176 d~L~~~L~~~l 186 (311) T Consensus 151 ~e~F~~l~~~i 161 (161) T cd04117 151 KESFTRLTELV 161 (161) T ss_pred HHHHHHHHHHC T ss_conf 99999999649

HHsearch alignment for GI: 254780941 and conserved domain: cd04117