>cd00876 Ras Ras family. The Ras family of the Ras superfamily includes classical N-Ras, H-Ras, and K-Ras, as well as R-Ras, Rap, Ral, Rheb, Rhes, ARHI, RERG, Rin/Rit, RSR1, RRP22, Ras2, Ras-dva, and RGK proteins. Ras proteins regulate cell growth, proliferation and differentiation. Ras is activated by guanine nucleotide exchange factors (GEFs) that release GDP and allow GTP binding. Many RasGEFs have been identified. These are sequestered in the cytosol until activation by growth factors triggers recruitment to the plasma membrane or Golgi, where the GEF colocalizes with Ras. Active GTP-bound Ras interacts with several effector proteins: among the best characterized are the Raf kinases, phosphatidylinositol 3-kinase (PI3K), RalGEFs and NORE/MST1. 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 m

Probab=99.71 E-value=1.9e-16 Score=126.22 Aligned_cols=151 Identities=21% Similarity=0.200 Sum_probs=101.0 Q ss_pred EEEECCCCCCHHHHHHHHHCCCEEEECCCCCCEEEEEEEEEEECC--EEEEEEECCCCHHHCCCCCCCCCCHHHHHHHHH Q ss_conf 998338998688999998689202105888860212789997399--489999879840101235753210023455553 Q gi|254780941|r 25 VALVGATNAGKSTLVNRFVGAKVSIVTHKVQTTRSIVRGIVSEKE--SQIVFLDTPGIFNAKDSYHKLMIRLSWSTIKHA 102 (311) Q Consensus 25 VaivG~pN~GKSTL~N~l~g~~vsivS~k~~TTr~~i~gi~~~~~--~qiifvDTPG~~~~~~~l~~~~~~~~~~~l~~a 102 (311) T Consensus 2 i~ivG~~~vGKTsli~r~~~~~f~--~~~~pTi~~~~~~~~~~~~~~~~l~i~Dt~g~~~--------~~~~~~~~~~~a 71 (160) T cd00876 2 VVVLGAGGVGKSAITIQFVKGTFV--EEYDPTIEDSYRKTIVVDGETYTLDILDTAGQEE--------FSAMRDLYIRQG 71 (160) T ss_pred EEEECCCCCCHHHHHHHHHHCCCC--CCCCCCEEEEEEEEEEECCEEEEEEEEECCCCHH--------HHHHHHHHHHHC T ss_conf 999996996799999999619599--8778830048999999766999999997999623--------557889997643 Q ss_pred HHHCCCCHHHHHHHCC-HHHHHHHHH----HCCCCCEEEEEECCCHHHHHH-HHHHHHHHHCCCCCCCCCCCCCCCCCHH Q ss_conf 2100110000100000-001223454----428720257872110104345-7888864100123343110001387426 Q gi|254780941|r 103 DIVCLVVDSHRELKVN-IHDLLKEIA----KRSSRLILILNKIDCVKPERL-LEQAEIANKLVFIEKTFMVSATKGHGCD 176 (311) Q Consensus 103 Diil~VvDa~~~~~~~-~~~il~~l~----~~~~p~IiVlNKiDlv~~~~l-~~~~~~~~~~~~~~~i~~ISAk~g~Gid 176 (311) T Consensus 72 ~~~ilvfd~~~~~Sf~~i~~~~~~i~~~~~~~~~piilvgnK~Dl~~~~~V~~~e~~~~a~~~~-~~y~e~Sak~g~nV~ 150 (160) T cd00876 72 DGFILVYSITDRESFEEIKGYREQILRVKDDEDIPIVLVGNKCDLENERQVSKEEGKALAKEWG-CPFIETSAKDNINID 150 (160) T ss_pred CEEEEEECCCCHHHHHHHHHHHHHHHHHHCCCCCEEEEEEECCCCHHCCCCCHHHHHHHHHHCC-CEEEEECCCCCCCHH T ss_conf 6899973289878999999999999997287886299999745622307899999999999849-979998479894989 Q ss_pred HHHHHHHHHC Q ss_conf 7899999836 Q gi|254780941|r 177 DVLNYLCSTL 186 (311) Q Consensus 177 ~L~~~L~~~l 186 (311) T Consensus 151 e~F~~i~~~i 160 (160) T cd00876 151 EVFKLLVREI 160 (160) T ss_pred HHHHHHHHHC T ss_conf 9999999729

HHsearch alignment for GI: 254780941 and conserved domain: cd00876