>cd04123 Rab21 Rab21 subfamily. The localization and function of Rab21 are not clearly defined, with conflicting data reported. Rab21 has been reported to localize in the ER in human intestinal epithelial cells, with partial colocalization with alpha-glucosidase, a late endosomal/lysosomal marker. More recently, Rab21 was shown to colocalize with and affect the morphology of early endosomes. In Dictyostelium, GTP-bound Rab21, together with two novel LIM domain proteins, LimF and ChLim, has been shown to regulate phagocytosis. 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

Probab=99.56 E-value=3.1e-14 Score=100.93 Aligned_cols=157 Identities=19% Similarity=0.167 Sum_probs=86.1 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 1 ~Ki~vvG~~~vGKTsli~r~~~~~f~---~~~~~ti~~~---~~~k~i~~~~~~~~l~iwDt~G~~~~~~~~~~~----- 69 (162) T cd04123 1 FKVVLLGEGRVGKTSLVLRYVENKFN---EKHESTTQAS---FFQKTVNIGGKRIDLAIWDTAGQERYHALGPIY----- 69 (162) T ss_pred CEEEEECCCCCCHHHHHHHHHHCCCC---CCCCCCCEEE---EEEEEEEECCEEEEEEEEECCCCCCCCCCCHHH----- T ss_conf 98999999996799999999839899---8767752647---999999999999999999589973035563133----- Q ss_pred HHHHHHHHHHHHCCCCCCCCCCCCCC--HHHH--HHHHHHCCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHHHHCCCCC Q ss_conf 99877776642000001122357887--5454--5543210257532212222111102468999999999975313689 Q gi|254780484|r 110 LIVRYLSERSTLRCVYLLIDCRHGVK--QIDQ--DVFSFLDKKAVSYQIVLTKIDKLSPTTAQETLEKTKYLIRNYPTAH 185 (212) Q Consensus 110 ~~~~~~~~~~~~~~~~~~~~~~~~~~--~~~~--~~~~~~~~~~~~~~~v~nK~D~~~~~~~~~~~~~~~~~~~~~~~~~ 185 (212) T Consensus 70 -----~---~~a~~~ilv~d~t~~~Sf~~i~~~~~~i~~~~~~~~~iilvgnK~Dl~~~r~v~--~~e~~~~a~~~---~ 136 (162) T cd04123 70 -----Y---RDADGAILVYDITDADSFQKVKKWIKELKQMRGNNISLVIVGNKIDLERQRVVS--KSEAEEYAKSV---G 136 (162) T ss_pred -----E---ECCCEEEEEEECCCHHHHHHHHHHHHHHHHHCCCCCCEEEECCCCCCHHHCCCC--HHHHHHHHHHC---C T ss_conf -----0---114457999638998999999999999998769997468663321325408889--99999999982---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 137 ~~y~e~Sak~g~nV~e~F~~l~~~i 161 (162) T cd04123 137 AKHFETSAKTGKGIEELFLSLAKRM 161 (162) T ss_pred CEEEEEECCCCCCHHHHHHHHHHHH T ss_conf 9899981278819899999999986

HHsearch alignment for GI: 254780484 and conserved domain: cd04123