>cd05109 PTKc_HER2 Catalytic Domain of the Protein Tyrosine Kinase, HER2. Protein Tyrosine Kinase (PTK) family; HER2 (ErbB2, HER2/neu); 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. HER2 is a member of the EGFR (HER, ErbB) subfamily of proteins, which are receptor tyr kinases (RTKs) containing an extracellular EGF-related ligand-binding region, a transmembrane helix, and a cytoplasmic region with a tyr kinase domain and a regulatory C-terminal tail. Unlike other tyr kinases, phosphorylation of the activation loop of EGFR proteins is not critical to their activation. Instead, they are activated by ligand-induced dimerization, leading to the phosphorylation of tyr residues in the C-terminal tail, which serve

Probab=96.32 E-value=0.093 Score=31.00 Aligned_cols=140 Identities=16% Similarity=0.189 Sum_probs=68.5 Q ss_pred EEEEEECCCCCEEEEEEEE-ECCCC-----EEEEEECCCCCHHH---HHHHHHHHHHHHHCCCCCCCCCCCCHHHHHHHH Q ss_conf 0531004668120017999-43995-----89998216699889---999999999985326775551001026778752 Q gi|254780795|r 24 LNSVQPIIHGVENSNFVIQ-TSKGT-----FILTIYEKRMNEKD---LPVFIELLHYISRNKLPCPIPIPRNDGKLYGFL 94 (316) Q Consensus 24 ~~~~~~i~~G~~Ntny~v~-t~~~~-----yiLri~e~~~~~~~---l~~~~~ll~~L~~~gipvP~pi~~~~G~~~~~~ 94 (316) T Consensus 9 l~~~k~iG~G~fG~Vy~g~~~~~~~~~~~~vavK~l~~~~~~~~~~~~~~E~~il~~l~-----hpnIv~~~-g~~---~ 79 (279) T cd05109 9 LKKVKVLGSGAFGTVYKGIWIPDGENVKIPVAIKVLRENTSPKANKEILDEAYVMAGVG-----SPYVCRLL-GIC---L 79 (279) T ss_pred CEEEEEEECCCCCEEEEEEECCCCCEEEEEEEEEEECCCCCHHHHHHHHHHHHHHHHCC-----CCCCCEEE-EEE---E T ss_conf 98825980178919997899189988868999999884579899999999999998679-----99898099-999---9 Q ss_pred CCCCEEEEECCCCCCCCCCCHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCHHHHHHHHHHHHHCCCHHHHHHHHHHHHHH Q ss_conf 24515578647887076899899999999864367530687543323112456457667520015522788999999988 Q gi|254780795|r 95 CKKPANIFSFIKGSPLNHISDIHCEEIGSMLASMHQKTKNFHLYRKNTLSPLNLKFLWAKCFDKVDEDLKKEIDHEFCFL 174 (316) Q Consensus 95 ~~k~~~L~~~i~G~~~~~~~~~~~~~lG~~La~lH~~~~~f~~~r~~~~~~~~~~~~~~~~~~~~~~~~~~~l~~~l~~~ 174 (316) T Consensus 80 ~~~~~lv~e~~~~G~L--------------~~~l~~~~~~~--------~~---~~~---------~~i~~qia~gl~yL 125 (279) T cd05109 80 TSTVQLVTQLMPYGCL--------------LDYVRENKDRI--------GS---QDL---------LNWCVQIAKGMSYL 125 (279) T ss_pred ECCEEEEEEECCCCCH--------------HHHHHHCCCCC--------CH---HHH---------HHHHHHHHHHHHHH T ss_conf 6890799997889978--------------99998568999--------99---999---------99999999999999 Q ss_pred HHHHHHCCCCCEEECCCCCCCEEECCCCCEEEECCCCCC Q ss_conf 876521077744402234642256279604873162135 Q gi|254780795|r 175 KESWPKNLPTGIIHADLFPDNVLFYNNKIMGLIDFYFSC 213 (316) Q Consensus 175 ~~~~~~~Lp~g~IHgDl~~~NiL~~~~~i~giIDF~~~~ 213 (316) T Consensus 126 H~-------~~IiHrDlKp~NILi~~~~~~Ki~DFGls~ 157 (279) T cd05109 126 EE-------VRLVHRDLAARNVLVKSPNHVKITDFGLAR 157 (279) T ss_pred HH-------CCEECCCCCCCCEEECCCCCEEEEECCCCC T ss_conf 85-------990137657310898899939997447761

HHsearch alignment for GI: 254780795 and conserved domain: cd05109