>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=98.74 E-value=9.3e-08 Score=68.54 Aligned_cols=112 Identities=22% Similarity=0.187 Sum_probs=72.1 Q ss_pred EEEEECCCCCCHHHHHHHHHHHCCCCCCCCEECCCCEECCCHHHHHHHCCCEEEEEEEEEECCCCCCCEEEEEEECCCCC Q ss_conf 79998687889778999999980873214220179561378088987085376407999960777871389998179875 Q gi|254780264|r 12 NFGIMAHIDAGKTTTTERILYYAGKSHKIGEVHDGSATMDWMEQEQERGITITSASTTVFWPGRDGGQKKLTIIDTPGHV 91 (701) Q Consensus 12 Nv~iiaHvd~GKTTL~d~LL~~~g~i~~~g~v~~g~~~~D~~~~E~eRgITi~ss~~sl~~~~~~~~~~~iNlIDTPGH~ 91 (701) T Consensus 2 Ki~vvG~~~vGKTsli~r~~~--~~f~~--~------~~~----------ti~~~~~~k~i~-~~~~~~~l~iwDt~G~~ 60 (162) T cd04123 2 KVVLLGEGRVGKTSLVLRYVE--NKFNE--K------HES----------TTQASFFQKTVN-IGGKRIDLAIWDTAGQE 60 (162) T ss_pred EEEEECCCCCCHHHHHHHHHH--CCCCC--C------CCC----------CCEEEEEEEEEE-ECCEEEEEEEEECCCCC T ss_conf 899999999679999999983--98998--7------677----------526479999999-99999999999589973 Q ss_pred CCHHHHHHHHHHHCEEEEEEECCCCCCHHH-HHH---HHHHHHCCCCEEEEECCCCC Q ss_conf 528999999986045699995588888347-999---99998739978999817676 Q gi|254780264|r 92 DFTMEVERSIRVTDGAIALLDSNAGVEPQT-ETV---WRQADKYSVPRVIFCNKMDK 144 (701) Q Consensus 92 DF~~Ev~~aL~~~DgailvVDa~eGv~~qT-~~v---lr~~~~~~lp~ilvINKiDr 144 (701) T Consensus 61 ~~~~~~~~~~~~a~~~ilv~d~t~~~Sf~~i~~~~~~i~~~~~~~~~iilvgnK~Dl 117 (162) T cd04123 61 RYHALGPIYYRDADGAILVYDITDADSFQKVKKWIKELKQMRGNNISLVIVGNKIDL 117 (162) T ss_pred CCCCCCHHHEECCCEEEEEEECCCHHHHHHHHHHHHHHHHHCCCCCCEEEECCCCCC T ss_conf 035563133011445799963899899999999999999876999746866332132

HHsearch alignment for GI: 254780264 and conserved domain: cd04123