>cd05067 PTKc_Lck_Blk Catalytic Domain of the Protein Tyrosine Kinases, Lymphocyte-specific kinase and Blk. Protein Tyrosine Kinase (PTK) family; Lck and Blk kinases; 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. Lck (lymphocyte-specific kinase) and Blk are members of the Src subfamily of proteins, which are cytoplasmic (or non-receptor) tyr kinases. Src kinases contain an N-terminal SH4 domain with a myristoylation site, followed by SH3 and SH2 domains, a tyr kinase domain, and a regulatory C-terminal region containing a conserved tyr. They are activated by autophosphorylation at the tyr kinase domain, but are negatively regulated by phosphorylation at the C-terminal tyr by Csk (C-terminal Src Kinase). Sr

Probab=96.78 E-value=0.048 Score=32.87 Aligned_cols=141 Identities=13% Similarity=0.206 Sum_probs=76.9 Q ss_pred EEEEEECCCCCEEEEEEEEECCC-CEEEEEECCC-CCHHHHHHHHHHHHHHHHCCCCCCCCCCCCHHHHHHHHCCCCEEE Q ss_conf 05310046681200179994399-5899982166-998899999999999853267755510010267787522451557 Q gi|254780795|r 24 LNSVQPIIHGVENSNFVIQTSKG-TFILTIYEKR-MNEKDLPVFIELLHYISRNKLPCPIPIPRNDGKLYGFLCKKPANI 101 (316) Q Consensus 24 ~~~~~~i~~G~~Ntny~v~t~~~-~yiLri~e~~-~~~~~l~~~~~ll~~L~~~gipvP~pi~~~~G~~~~~~~~k~~~L 101 (316) T Consensus 8 ~~~~~~iG~G~fg~Vy~~~~~~~~~VAvK~l~~~~~~~~~f~~E~~il~~l~Hpn-----IV~~~-g~---~~~~~~~lv 78 (260) T cd05067 8 LKLVKKLGAGQFGEVWMGYYNNHTKVAIKSLKEGTMSPEAFLAEANLMKQLQHER-----LVRLY-AV---VTQEPIYIV 78 (260) T ss_pred EEEEEEEECCCCCEEEEEEECCCCEEEEEEECCCCCCHHHHHHHHHHHHHCCCCC-----CCCEE-EE---EECCCEEEE T ss_conf 7973598318785999999889989999998967899999999999998689978-----98199-99---956963999 Q ss_pred EECCCCCCCCCCCHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCHHHHHHHHHHHHHCCCHHHHHHHHHHHHHHHHHHHHC Q ss_conf 86478870768998999999998643675306875433231124564576675200155227889999999888765210 Q gi|254780795|r 102 FSFIKGSPLNHISDIHCEEIGSMLASMHQKTKNFHLYRKNTLSPLNLKFLWAKCFDKVDEDLKKEIDHEFCFLKESWPKN 181 (316) Q Consensus 102 ~~~i~G~~~~~~~~~~~~~lG~~La~lH~~~~~f~~~r~~~~~~~~~~~~~~~~~~~~~~~~~~~l~~~l~~~~~~~~~~ 181 (316) T Consensus 79 ~Ey~~~G~L~~-----------~l---~~-~~~~~------l~---~~~~---------~~i~~qia~gl~yLH~----- 120 (260) T cd05067 79 TEYMENGSLVD-----------FL---KT-PEGIK------LT---INKL---------IDMAAQIAEGMAYIER----- 120 (260) T ss_pred EEECCCCCHHH-----------HH---HH-CCCCC------CC---HHHH---------HHHHHHHHHHHHHHHH----- T ss_conf 99069988999-----------98---30-67899------99---9999---------9999999999999974----- Q ss_pred CCCCEEECCCCCCCEEECCCCCEEEECCCCCC Q ss_conf 77744402234642256279604873162135 Q gi|254780795|r 182 LPTGIIHADLFPDNVLFYNNKIMGLIDFYFSC 213 (316) Q Consensus 182 Lp~g~IHgDl~~~NiL~~~~~i~giIDF~~~~ 213 (316) T Consensus 121 --~~ivHrDlKp~NILl~~~~~~Kl~DFGls~ 150 (260) T cd05067 121 --KNYIHRDLRAANILVSETLCCKIADFGLAR 150 (260) T ss_pred --CCEECCCCCCCEEEECCCCCEEEEECCCCE T ss_conf --897605466211898699988971035506

HHsearch alignment for GI: 254780795 and conserved domain: cd05067