>cd04140 ARHI_like ARHI subfamily. ARHI (A Ras homolog member I) is a member of the Ras family with several unique structural and functional properties. ARHI is expressed in normal human ovarian and breast tissue, but its expression is decreased or eliminated in breast and ovarian cancer. ARHI contains an N-terminal extension of 34 residues (human) that is required to retain its tumor suppressive activity. Unlike most other Ras family members, ARHI is maintained in the constitutively active (GTP-bound) state in resting cells and has modest GTPase activity. ARHI inhibits STAT3 (signal transducers and activators of transcription 3), a latent transcription factor whose abnormal activation plays a critical role in oncogenesis. Most Ras proteins contain a lipid modification site at the C-terminus, with a typical sequence motif CaaX, where a = an aliphatic amino acid and X = any amino acid. Lipid binding is essential for membrane attachment, a key feature of most Ras proteins. Due to

Probab=99.48 E-value=3.6e-13 Score=94.88 Aligned_cols=155 Identities=15% Similarity=0.147 Sum_probs=84.2 Q ss_pred EEEEECCCCCCHHHHHHHHHCCCCEEEECCCCCEEEECCEEEEEEEEEEEECCCEEEEEECCHHHHHHHHHHHHHHHHHH Q ss_conf 89997489988989999973897379873888414521202665556785089649999760010111224478988889 Q gi|254780484|r 31 EIAFSGRSNVGKSSLINILVNRKNLARTSNAPGRTQHLNFFVPKDFSNLKNNLPAMALVDMPGYGYARAPKKNVDSWGGL 110 (212) Q Consensus 31 ~VaivG~~NvGKSSLiNaL~g~~~~a~~~~~p~tt~~~~~~~~~~~~~~~~~~~~~~~~DtpG~~~~~~~~~~~~~~~~~ 110 (212) T Consensus 3 KivllGd~~VGKTsli~r~~~~~F~--~~y~~Ti-~~--~--~~~~i~~~~~~~~l~iwDtaG~e~~~~l~~~~------ 69 (165) T cd04140 3 RVVVFGAGGVGKSSLVLRFVKGTFR--ESYIPTI-ED--T--YRQVISCSKNICTLQITDTTGSHQFPAMQRLS------ 69 (165) T ss_pred EEEEECCCCCCHHHHHHHHHHCCCC--CCCCCCC-CC--E--EEEEEEECCEEEEEEEEECCCCCCCCCCHHHH------ T ss_conf 9999899997699999999649699--9868845-42--0--55899999999999999899984654232445------ Q ss_pred HHHHHHHHHHHCCCCCCCCCCCCCCHH--H---HHHHHHH--CCCCCCCCCCCCCCCCCCHHHHHHHHHHHHHHHHHCCC Q ss_conf 987777664200000112235788754--5---4554321--02575322122221111024689999999999753136 Q gi|254780484|r 111 IVRYLSERSTLRCVYLLIDCRHGVKQI--D---QDVFSFL--DKKAVSYQIVLTKIDKLSPTTAQETLEKTKYLIRNYPT 183 (212) Q Consensus 111 ~~~~~~~~~~~~~~~~~~~~~~~~~~~--~---~~~~~~~--~~~~~~~~~v~nK~D~~~~~~~~~~~~~~~~~~~~~~~ 183 (212) T Consensus 70 ----~---~~a~~~ilvydit~~~Sf~~~~~~~~~i~~~~~~~~~~~piilVgNK~Dl~~~r~V~~--~e~~~~a~~~-- 138 (165) T cd04140 70 ----I---SKGHAFILVYSVTSKQSLEELKPIYELICEIKGNNIEKIPIMLVGNKCDESHKREVSS--NEGAACATEW-- 138 (165) T ss_pred ----H---CCCCEEEEEECCCCHHHHHHHHHHHHHHHHHHHCCCCCCCEEEEEECCCCCCCCCCCH--HHHHHHHHHC-- T ss_conf ----0---6885799981389878999999999999999615888887899864246400278899--9999999986-- Q ss_pred CCCCEEEEECCCCCCHHHHHHHHHHHH Q ss_conf 898689998888899899999999872 Q gi|254780484|r 184 AHPEVIPTSSVKRKGIEVLRKAILETI 210 (212) Q Consensus 184 ~~~~i~~vSA~~g~Gi~eL~~~I~~~l 210 (212) T Consensus 139 -~~~~~E~SAk~~~nV~e~F~~l~~l~ 164 (165) T cd04140 139 -NCAFMETSAKTNHNVQELFQELLNLE 164 (165) T ss_pred -CCEEEEECCCCCCCHHHHHHHHHHCC T ss_conf -98899974477948799999998140

HHsearch alignment for GI: 254780484 and conserved domain: cd04140