>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=93.69 E-value=0.51 Score=25.43 Aligned_cols=111 Identities=17% Similarity=0.237 Sum_probs=71.0 Q ss_pred HCCCEEEECCCCCCC--HHHHHHHHHCCCCCCCCCC-CHHHHHHHHHHHHHHHHCCCCCCCCEEEEECCCCCCCCHHHHH Q ss_conf 128889973888889--8999998620125435787-7688999999999999819876753899956589875200599 Q gi|254780725|r 273 QIFPLVILDVPHVWN--SWTQEVLTLSDKVVITTSL-DLAGLRNSKNLIDVLKKLRPADKPPYLVLNQVKTPKKPEISIS 349 (427) Q Consensus 273 ~~yd~VIiD~p~~~~--~~~~~~L~~AD~vviV~~p-~~~slr~a~~ll~~l~~~~~~~~~~~iVlNr~~~~~~~~i~~~ 349 (427) T Consensus 47 ~~~~l~iwDt~G~~~~~~~~~~~~~~a~~~ilv~d~t~~~Sf~~i~~~~~~i~~~~~~~~~iilvgnK~Dl~~~r~v~~~ 126 (162) T cd04123 47 KRIDLAIWDTAGQERYHALGPIYYRDADGAILVYDITDADSFQKVKKWIKELKQMRGNNISLVIVGNKIDLERQRVVSKS 126 (162) T ss_pred EEEEEEEEECCCCCCCCCCCHHHEECCCEEEEEEECCCHHHHHHHHHHHHHHHHHCCCCCCEEEECCCCCCHHHCCCCHH T ss_conf 99999999589973035563133011445799963899899999999999999876999746866332132540888999 Q ss_pred HHHHHHCCCEEEEECCCHHHHHHHHHCCCCEEEECCCC--HHHHHHHHHHHHHH Q ss_conf 99998489537990687999999884796189888999--89999999999985 Q gi|254780725|r 350 DFCAPLGITPSAIIPFDGAVFGMSANSGKMIHEVDPKS--AIANLLVDFSRVLM 401 (427) Q Consensus 350 ~~~~~lg~~~~~~IP~D~~~~~~A~~~G~pi~e~~p~s--~~a~~~~~La~~i~ 401 (427) T Consensus 127 e~------------------~~~a~~~~~~y~e~Sak~g~nV~e~F~~l~~~il 162 (162) T cd04123 127 EA------------------EEYAKSVGAKHFETSAKTGKGIEELFLSLAKRMI 162 (162) T ss_pred HH------------------HHHHHHCCCEEEEEECCCCCCHHHHHHHHHHHHC T ss_conf 99------------------9999982998999812788198999999999869

HHsearch alignment for GI: 254780725 and conserved domain: cd04123