>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=99.47 E-value=1.2e-12 Score=104.30 Aligned_cols=153 Identities=23% Similarity=0.293 Sum_probs=103.1 Q ss_pred EEEECCCCCCHHHHHHHHHHHCCCCCCCCCCCEEECCCHHHHHHCCEEEEEEEEEEEECCCCCEEEEEEEECCCCCHHHH Q ss_conf 99980138987788999999829805444431130586779871950523279999743788438999961787300279 Q gi|254780321|r 14 FSIVAHIDHGKSTLADRFIQHCRGLTEREMSSQVLDNMDIERERGITIKAQTVRLNYTSTDAKDYQLNLIDTPGHVDFTY 93 (606) Q Consensus 14 ~~IiaHvDhGKTTL~d~lL~~tg~i~~~~~~~~vlD~~~~EreRGITIka~~~~~~~~~~~~~~y~iNlIDTPGH~DF~~ 93 (606) T Consensus 3 ivvvG~~~vGKTsli~r~~--~~~f~~~~-~----------~ti~~~~~~~--~~~---~~~~~~~l~iwDt~g~~~~~~ 64 (161) T cd01863 3 ILLIGDSGVGKSSLLLRFT--DDTFDPDL-A----------ATIGVDFKVK--TLT---VDGKKVKLAIWDTAGQERFRT 64 (161) T ss_pred EEEECCCCCCHHHHHHHHH--HCCCCCCC-C----------CCCCCCCEEE--EEE---ECCEEEEEEEEECCCCCCCCC T ss_conf 9999979957999999996--39999984-8----------7313342389--999---999999999999999842353 Q ss_pred HHHHHHHHCCEEEEEEECCCCCCHHHHHHHHHHHH-----CCCCEEEEECCCCCCCCCCC-CHHHHHHHHHHHHHHHHHH Q ss_conf 99999973026899998687886558999999997-----09967998326788753211-3388877555322321000 Q gi|254780321|r 94 EVSRSLSACEGSLLVVDATQGVEAQTLANVYQAID-----NNHEIITVLNKADLPSADPD-RVKKQIEETIGISTEDALL 167 (606) Q Consensus 94 EV~r~l~a~dgaiLvVdA~~Gvq~QT~~~~~~A~~-----~~l~~I~viNKiD~~~A~~e-~v~~ei~~~~g~~~~~ii~ 167 (606) T Consensus 65 ~~~~~~~~a~~~ilvfd~~~~~Sf~~i~~~~~~i~~~~~~~~~~~ilVgnK~D~~~~~v~~~~~~~~a~~~~~---~y~e 141 (161) T cd01863 65 LTSSYYRGAQGVILVYDVTRRDTFTNLETWLNELETYSTNNDIVKMLVGNKIDKENREVTREEGLKFARKHNM---LFIE 141 (161) T ss_pred CHHHHHHHCCEEEEEEECCCHHHHHHHHHHHHHHHHHCCCCCCEEEEEEECCCCCCCCCCHHHHHHHHHHCCC---EEEE T ss_conf 4224413215348997678265699999999999985688887378873104400068999999999998699---9999 Q ss_pred HHHHCCCCCCHHHHHHHHHH Q ss_conf 11100223200678776321 Q gi|254780321|r 168 VSAKTGEGIPLLLERIVQQL 187 (606) Q Consensus 168 vSAktG~GV~~LLd~Iv~~i 187 (606) T Consensus 142 ~Sak~g~nV~~~F~~l~~~i 161 (161) T cd01863 142 TSAKTRDGVQQAFEELVEKI 161 (161) T ss_pred ECCCCCCCHHHHHHHHHHHC T ss_conf 71586815999999999709

HHsearch alignment for GI: 254780321 and conserved domain: cd01863