>cd05093 PTKc_TrkB Catalytic Domain of the Protein Tyrosine Kinase, Tropomyosin Related Kinase B. Protein Tyrosine Kinase (PTK) family; Tropomyosin related kinase B (TrkB); 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. TrkB is a member of the Trk subfamily of proteins, which are receptor tyr kinases (RTKs) containing an extracellular region with arrays of leucine-rich motifs flanked by two cysteine-rich clusters followed by two immunoglobulin-like domains, a transmembrane segment, and an intracellular catalytic domain. Binding of TrkB to its ligands, brain-derived neurotrophic factor (BDNF) or neurotrophin 4 (NT4), results in receptor oligomerization and activation of the catalytic domain. TrkB is broadly

Probab=94.47 E-value=0.026 Score=34.57 Aligned_cols=149 Identities=18% Similarity=0.230 Sum_probs=70.7 Q ss_pred EECCCCCEEEEEEEEE-----CCCC--EEEEEECCCCC--HHHHHHHHHHHHHHHHCCCCCCCCCCCCHHHHHHHHCCCC Q ss_conf 0046681200179994-----3995--89998216699--8899999999999853267755510010267787522451 Q gi|254780795|r 28 QPIIHGVENSNFVIQT-----SKGT--FILTIYEKRMN--EKDLPVFIELLHYISRNKLPCPIPIPRNDGKLYGFLCKKP 98 (316) Q Consensus 28 ~~i~~G~~Ntny~v~t-----~~~~--yiLri~e~~~~--~~~l~~~~~ll~~L~~~gipvP~pi~~~~G~~~~~~~~k~ 98 (316) T Consensus 11 ~~iG~G~fG~Vy~a~~~~~~~~~~~~~vAvK~l~~~~~~~~~~~~~E~~il~~l~H-----pnIV~~~-g--~~~~~~~~ 82 (288) T cd05093 11 RELGEGAFGKVFLAECYNLCPEQDKILVAVKTLKDASDNARKDFHREAELLTNLQH-----EHIVKFY-G--VCVEGDPL 82 (288) T ss_pred EEECCCCCCEEEEEEEECCCCCCCCEEEEEEEECCCCHHHHHHHHHHHHHHHHCCC-----CCCCCEE-E--EEEECCEE T ss_conf 59804768299999980577687667999999587685899999999999986799-----8877387-8--99679989 Q ss_pred EEEEECCCCCCCCCCCHHHHHHHHHHHHHHHHHCCCCCCCCCCCCCHHHHHHHHHHHHHCCCHHHHHHHHHHHHHHHHHH Q ss_conf 55786478870768998999999998643675306875433231124564576675200155227889999999888765 Q gi|254780795|r 99 ANIFSFIKGSPLNHISDIHCEEIGSMLASMHQKTKNFHLYRKNTLSPLNLKFLWAKCFDKVDEDLKKEIDHEFCFLKESW 178 (316) Q Consensus 99 ~~L~~~i~G~~~~~~~~~~~~~lG~~La~lH~~~~~f~~~r~~~~~~~~~~~~~~~~~~~~~~~~~~~l~~~l~~~~~~~ 178 (316) T Consensus 83 ~iv~Ey~~~G~L~~----~l~~~~~~~~~~---~~~---~~~~~l~---~~~~---------~~i~~qia~gl~yLH~-- 138 (288) T cd05093 83 IMVFEYMKHGDLNK----FLRAHGPDAVLM---AEG---NRPAELT---QSQM---------LHIAQQIAAGMVYLAS-- 138 (288) T ss_pred EEEEECCCCCCHHH----HHHHCCCCCCCC---CCC---CCCCCCC---HHHH---------HHHHHHHHHHHHHHHH-- T ss_conf 99998069990899----998708641000---135---7766689---9999---------9999999999999844-- Q ss_pred HHCCCCCEEECCCCCCCEEECCCCCEEEECCCCCC Q ss_conf 21077744402234642256279604873162135 Q gi|254780795|r 179 PKNLPTGIIHADLFPDNVLFYNNKIMGLIDFYFSC 213 (316) Q Consensus 179 ~~~Lp~g~IHgDl~~~NiL~~~~~i~giIDF~~~~ 213 (316) T Consensus 139 -----~~iiHRDLKp~NILl~~~~~~Ki~DFGls~ 168 (288) T cd05093 139 -----QHFVHRDLATRNCLVGENLLVKIGDFGMSR 168 (288) T ss_pred -----CCCCCCCCCCCEEEECCCCCEEEEECCCCC T ss_conf -----894678777132899999939982155573

HHsearch alignment for GI: 254780795 and conserved domain: cd05093