>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=99.70 E-value=5e-17 Score=133.67 Aligned_cols=151 Identities=17% Similarity=0.205 Sum_probs=92.3 Q ss_pred EEEEEECCCCCHHHHHHHHHCCCCCCCHHHHHHHHHCCCCEEEECCEE--EEEEECHHCCCCCCCCCHHHHHHCCCCCEE Q ss_conf 388640356425678876520121100024566542023114203406--999817110444443000111000121001 Q gi|255764471|r 205 RIAVVGRPNVGKSTLINRLLGYNRLLTGSQSGITRDSVSISWNWKNHP--IEIFDTAGMRKPSRITESLEQKTVKKSMQS 282 (470) Q Consensus 205 ~~~~~G~pN~GKStl~N~l~~~~r~ivs~~~GtTrD~i~~~~~~~~~~--~~liDTaGirkk~~~~~~~E~~s~~~t~~~ 282 (470) T Consensus 1 Ki~ivG~~~vGKTsli~r~~~~~f--~~~~~pTi~~~~~~~~~~~~~~~~l~i~Dt~g~----------~~~~~~-~~~~ 67 (160) T cd00876 1 KVVVLGAGGVGKSAITIQFVKGTF--VEEYDPTIEDSYRKTIVVDGETYTLDILDTAGQ----------EEFSAM-RDLY 67 (160) T ss_pred CEEEECCCCCCHHHHHHHHHHCCC--CCCCCCCEEEEEEEEEEECCEEEEEEEEECCCC----------HHHHHH-HHHH T ss_conf 999999699679999999961959--987788300489999997669999999979996----------235578-8999 Q ss_pred EECCEEEEEECCCCCCCHHHHH-HHHHHHH----CCCCCCCEEEECCCCCCCHHHHHHHHHHHCCCCCCCCCCCCCCCCC Q ss_conf 2012059984553212202122-3200000----0357665589442233541555666542013332004883111234 Q gi|255764471|r 283 VRTCETTIVLLDATIPFEKQDL-RIVDSVF----NTGHAVVLALNKWDMVSDKLNLLQDLRTKAIKNLPQIGDIYINTIS 357 (470) Q Consensus 283 i~~advvi~viDa~~~~~~qd~-~i~~~i~----~~~k~~iiv~NK~Dli~~~~~~~~~~~~~~~~~~~~~~~~~i~~iS 357 (470) T Consensus 68 ~~~a~~~ilvfd~~~~~Sf~~i~~~~~~i~~~~~~~~~piilvgnK~Dl~~~~~V~~~e~~~~a-~~----~~~~y~e~S 142 (160) T cd00876 68 IRQGDGFILVYSITDRESFEEIKGYREQILRVKDDEDIPIVLVGNKCDLENERQVSKEEGKALA-KE----WGCPFIETS 142 (160) T ss_pred HHHCCEEEEEECCCCHHHHHHHHHHHHHHHHHHCCCCCEEEEEEECCCCHHCCCCCHHHHHHHH-HH----CCCEEEEEC T ss_conf 7643689997328987899999999999999728788629999974562230789999999999-98----499799984 Q ss_pred CCCCCCHHHHHHHHHH Q ss_conf 5333485899999999 Q gi|255764471|r 358 GRTGEGLDDLMVSVLE 373 (470) Q Consensus 358 A~~g~gi~~l~~~i~~ 373 (470) T Consensus 143 ak~g~nV~e~F~~i~~ 158 (160) T cd00876 143 AKDNINIDEVFKLLVR 158 (160) T ss_pred CCCCCCHHHHHHHHHH T ss_conf 7989498999999997

HHsearch alignment for GI: 255764471 and conserved domain: cd00876