>cd00154 Rab Rab family. Rab GTPases form the largest family within the Ras superfamily. There are at least 60 Rab genes in the human genome, and a number of Rab GTPases are conserved from yeast to humans. Rab GTPases are small, monomeric proteins that function as molecular switches to regulate vesicle trafficking pathways. The different Rab GTPases are localized to the cytosolic face of specific intracellular membranes, where they regulate distinct steps in membrane traffic pathways. In the GTP-bound form, Rab GTPases recruit specific sets of effector proteins onto membranes. Through their effectors, Rab GTPases regulate vesicle formation, actin- and tubulin-dependent vesicle movement, and membrane fusion. 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 di

Probab=99.73 E-value=1e-17 Score=138.27 Aligned_cols=153 Identities=22% Similarity=0.292 Sum_probs=93.5 Q ss_pred EEEEEEECCCCCHHHHHHHHHCCCCCCCHHHHHHHHHCCCCEEEECCEE--EEEEECHHCCCCCCCCCHHHHHHCCCCCE Q ss_conf 0388640356425678876520121100024566542023114203406--99981711044444300011100012100 Q gi|255764471|r 204 LRIAVVGRPNVGKSTLINRLLGYNRLLTGSQSGITRDSVSISWNWKNHP--IEIFDTAGMRKPSRITESLEQKTVKKSMQ 281 (470) Q Consensus 204 i~~~~~G~pN~GKStl~N~l~~~~r~ivs~~~GtTrD~i~~~~~~~~~~--~~liDTaGirkk~~~~~~~E~~s~~~t~~ 281 (470) T Consensus 1 ~Ki~vvG~~~vGKTsli~~~~~~~-f~~~~~~Tig~d~~~~~~~~~~~~~~l~iwDt~G~----------e~~~~l~-~~ 68 (159) T cd00154 1 FKIVLIGDSGVGKTSLLLRFVDGK-FDENYKSTIGVDFKSKTIEIDGKTVKLQIWDTAGQ----------ERFRSIT-PS 68 (159) T ss_pred CEEEEECCCCCCHHHHHHHHHHCC-CCCCCCCCCCEEEEEEEEEECCEEEEEEEEECCCC----------HHHHHHH-HH T ss_conf 989999969968999999997099-99984886664799999999999999999978982----------6577889-99 Q ss_pred EEECCEEEEEECCCCCCCHHHHH-HHHHHHHC---CCCCCCEEEECCCCCCCHHHHHHHHHHHCCCCCCCCCCCCCCCCC Q ss_conf 12012059984553212202122-32000000---357665589442233541555666542013332004883111234 Q gi|255764471|r 282 SVRTCETTIVLLDATIPFEKQDL-RIVDSVFN---TGHAVVLALNKWDMVSDKLNLLQDLRTKAIKNLPQIGDIYINTIS 357 (470) Q Consensus 282 ~i~~advvi~viDa~~~~~~qd~-~i~~~i~~---~~k~~iiv~NK~Dli~~~~~~~~~~~~~~~~~~~~~~~~~i~~iS 357 (470) T Consensus 69 ~~~~~d~~ilv~d~~~~~Sf~~~~~~~~~i~~~~~~~~~iilvgnK~DL~~~~~v~~~~~~~~a~-----~~~~~~~e~S 143 (159) T cd00154 69 YYRGAHGAILVYDITNRESFENLDKWLKELKEYAPENIPIILVGNKIDLEDQRQVSTEEAQQFAK-----ENGLLFFETS 143 (159) T ss_pred HHHHCCEEEEECCCCCHHHHHHHHHHHHHHHHHCCCCCCEEEEEECCCCHHCCCCCHHHHHHHHH-----HCCCEEEEEC T ss_conf 97541275672448988999999999999998689888269999745630116899999999999-----8699799987 Q ss_pred CCCCCCHHHHHHHHHH Q ss_conf 5333485899999999 Q gi|255764471|r 358 GRTGEGLDDLMVSVLE 373 (470) Q Consensus 358 A~~g~gi~~l~~~i~~ 373 (470) T Consensus 144 Ak~~~~i~~~F~~i~~ 159 (159) T cd00154 144 AKTGENVEELFQSLAE 159 (159) T ss_pred CCCCCCHHHHHHHHHC T ss_conf 6888198999999869

HHsearch alignment for GI: 255764471 and conserved domain: cd00154