>cd05082 PTKc_Csk Catalytic Domain of the Protein Tyrosine Kinase, C-terminal Src kinase. Protein Tyrosine Kinase (PTK) family; C-terminal Src kinase (Csk); catalytic (c) domain. The PTKc family is part of a larger superfamily that includes the catalytic domains of other kinases such as protein serine/threonine kinases, RIO kinases, and phosphoinositide 3-kinase (PI3K). PTKs catalyze the transfer of the gamma-phosphoryl group from ATP to tyrosine (tyr) residues in protein substrates. The Csk subfamily kinases are cytoplasmic (or nonreceptor) tyr kinases containing the Src homology domains, SH3 and SH2, N-terminal to the catalytic tyr kinase domain. They negatively regulate the activity of Src kinases that are anchored to the plasma membrane. To inhibit Src kinases, Csk is translocated to the membrane via binding to specific transmembrane proteins, G-proteins, or adaptor proteins near the membrane. Csk catalyzes the tyr phosphorylation of the regulatory C-terminal tail of Src kinases, re

Probab=97.60 E-value=0.0016 Score=42.47 Aligned_cols=148 Identities=12% Similarity=0.130 Sum_probs=82.3 Q ss_pred EEECCCCCEEEEEEEEECCCCEEEEEECCCCCHHHHHHHHHHHHHHHHCCCCCCCCCCCCHHHHHHHHCCCCEEEEECCC Q ss_conf 10046681200179994399589998216699889999999999985326775551001026778752245155786478 Q gi|254780795|r 27 VQPIIHGVENSNFVIQTSKGTFILTIYEKRMNEKDLPVFIELLHYISRNKLPCPIPIPRNDGKLYGFLCKKPANIFSFIK 106 (316) Q Consensus 27 ~~~i~~G~~Ntny~v~t~~~~yiLri~e~~~~~~~l~~~~~ll~~L~~~gipvP~pi~~~~G~~~~~~~~k~~~L~~~i~ 106 (316) T Consensus 11 ~~~iG~G~fg~V~~~~~~g~~vAvK~i~~~~~~~~f~~E~~~l~~l~HpnI-----v~~~-g~-~~~~~~~~~iv~Ey~~ 83 (256) T cd05082 11 LQTIGKGEFGDVMLGDYRGNKVAVKCIKNDATAQAFLAEASVMTQLRHSNL-----VQLL-GV-IVEEKGGLYIVTEYMA 83 (256) T ss_pred EEEEEECCCCEEEEEEECCEEEEEEEECCCCCHHHHHHHHHHHHHCCCCCC-----CEEE-EE-EEECCCEEEEEEECCC T ss_conf 459820898389999989939999997873059999999999985799898-----8099-99-9937982999997489 Q ss_pred CCCCCCCCHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCHHHHHHHHHHHHHCCCHHHHHHHHHHHHHHHHHHHHCCCCCE Q ss_conf 87076899899999999864367530687543323112456457667520015522788999999988876521077744 Q gi|254780795|r 107 GSPLNHISDIHCEEIGSMLASMHQKTKNFHLYRKNTLSPLNLKFLWAKCFDKVDEDLKKEIDHEFCFLKESWPKNLPTGI 186 (316) Q Consensus 107 G~~~~~~~~~~~~~lG~~La~lH~~~~~f~~~r~~~~~~~~~~~~~~~~~~~~~~~~~~~l~~~l~~~~~~~~~~Lp~g~ 186 (316) T Consensus 84 ~gsL~~--------------~l~~~~~~-------~~---~~~~~---------~~i~~~ia~gl~yLH~-------~~i 123 (256) T cd05082 84 KGSLVD--------------YLRSRGRS-------VL---GGDCL---------LKFSLDVCEAMEYLEA-------NNF 123 (256) T ss_pred CCCHHH--------------HHHHCCCC-------CC---CHHHH---------HHHHHHHHHHHHHHHH-------CCC T ss_conf 997899--------------88656997-------79---99999---------9999999999999973-------993 Q ss_pred EECCCCCCCEEECCCCCEEEECCCCCCCCHHHCCH Q ss_conf 40223464225627960487316213568000198 Q gi|254780795|r 187 IHADLFPDNVLFYNNKIMGLIDFYFSCNDFLMYDL 221 (316) Q Consensus 187 IHgDl~~~NiL~~~~~i~giIDF~~~~~~~~i~DL 221 (316) T Consensus 124 iHrDlK~~NiLv~~~~~~Kl~DFGls~~~~~~~~~ 158 (256) T cd05082 124 VHRDLAARNVLVSEDNVAKVSDFGLTKEASSTQDT 158 (256) T ss_pred CCCCCCHHHEEECCCCCEEEEECCCCEECCCCCCC T ss_conf 77757762288989992898005777077777876

HHsearch alignment for GI: 254780795 and conserved domain: cd05082