>cd01865 Rab3 Rab3 subfamily. The Rab3 subfamily contains Rab3A, Rab3B, Rab3C, and Rab3D. All four isoforms were found in mouse brain and endocrine tissues, with varying levels of expression. Rab3A, Rab3B, and Rab3C localized to synaptic and secretory vesicles; Rab3D was expressed at high levels only in adipose tissue, exocrine glands, and the endocrine pituitary, where it is localized to cytoplasmic secretory granules. Rab3 appears to control Ca2+-regulated exocytosis. The appropriate GDP/GTP exchange cycle of Rab3A is required for Ca2+-regulated exocytosis to occur, and interaction of the GTP-bound form of Rab3A with effector molecule(s) is widely believed to be essential for this process. Functionally, most studies point toward a role for Rab3 in the secretion of hormones and neurotransmitters. 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 promot

Probab=99.56 E-value=4.7e-14 Score=99.92 Aligned_cols=157 Identities=12% Similarity=0.081 Sum_probs=86.4 Q ss_pred CEEEEECCCCCCHHHHHHHHHCCCCEEEECCCCCEEEECCEEEEEEEEEEEECCCEEEEEECCHHHHHHHHHHHHHHHHH Q ss_conf 68999748998898999997389737987388841452120266555678508964999976001011122447898888 Q gi|254780484|r 30 PEIAFSGRSNVGKSSLINILVNRKNLARTSNAPGRTQHLNFFVPKDFSNLKNNLPAMALVDMPGYGYARAPKKNVDSWGG 109 (212) Q Consensus 30 p~VaivG~~NvGKSSLiNaL~g~~~~a~~~~~p~tt~~~~~~~~~~~~~~~~~~~~~~~~DtpG~~~~~~~~~~~~~~~~ 109 (212) T Consensus 2 ~KivllGd~~VGKTsli~r~~~~~f~--~~y~~Tig~~~----~~k~i~~~~~~i~l~iwDtaGqe~~~~l~~~y~---- 71 (165) T cd01865 2 FKLLIIGNSSVGKTSFLFRYADDSFT--SAFVSTVGIDF----KVKTVFRNDKRVKLQIWDTAGQERYRTITTAYY---- 71 (165) T ss_pred EEEEEECCCCCCHHHHHHHHHCCCCC--CCCCCCCCEEE----EEEEEEECCEEEEEEEEECCCCCCCCCCHHHHH---- T ss_conf 89999999996889999999249889--97688763787----999999999999999996999834554415441---- Q ss_pred HHHHHHHHHHHHCCCCCCCCCCCCCC--HHH--HHHHHHHCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHHHHCCCCC Q ss_conf 99877776642000001122357887--545--45543210257532212222111102468999999999975313689 Q gi|254780484|r 110 LIVRYLSERSTLRCVYLLIDCRHGVK--QID--QDVFSFLDKKAVSYQIVLTKIDKLSPTTAQETLEKTKYLIRNYPTAH 185 (212) Q Consensus 110 ~~~~~~~~~~~~~~~~~~~~~~~~~~--~~~--~~~~~~~~~~~~~~~~v~nK~D~~~~~~~~~~~~~~~~~~~~~~~~~ 185 (212) T Consensus 72 ---------~~a~~~ilvydit~~~Sf~~~~~w~~~i~~~~~~~~~iilvgNK~DL~~~r~v~--~~~~~~~a~~~---~ 137 (165) T cd01865 72 ---------RGAMGFILMYDITNEESFNAVQDWSTQIKTYSWDNAQVILVGNKCDMEDERVVS--SERGRQLADQL---G 137 (165) T ss_pred ---------HCCCEEEEEECCCCHHHHHHHHHHHHHHHHHCCCCCEEEEEECCCCHHHCCCCC--HHHHHHHHHHC---C T ss_conf ---------135448998517887999999999999998689872599960242355518899--99999999986---9 Q ss_pred CCEEEEECCCCCCHHHHHHHHHHHH Q ss_conf 8689998888899899999999872 Q gi|254780484|r 186 PEVIPTSSVKRKGIEVLRKAILETI 210 (212) Q Consensus 186 ~~i~~vSA~~g~Gi~eL~~~I~~~l 210 (212) T Consensus 138 ~~~~E~SAk~~~nV~e~F~~l~~~i 162 (165) T cd01865 138 FEFFEASAKENINVKQVFERLVDII 162 (165) T ss_pred CEEEEECCCCCCCHHHHHHHHHHHH T ss_conf 9799976898908899999999999

HHsearch alignment for GI: 254780484 and conserved domain: cd01865