>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=98.52 E-value=2.3e-07 Score=76.25 Aligned_cols=144 Identities=13% Similarity=0.183 Sum_probs=86.6 Q ss_pred HHHHHHHHHHHHHHHHEECC---CCCCEEEEEEECCHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCHHHHHHHHHHHHH Q ss_conf 76667788886555502128---887236876403104688777788999875321146854334691799999998878 Q gi|254780623|r 124 DDPIAAASIAQVHPAVVHDI---NGYRKVAVKIIRPGVRKRFFRDIQVMYLIARIQEKLLPSMRRLCFSAVVRALEQVTK 200 (517) Q Consensus 124 dePlasASiaQVh~A~l~d~---~~g~~VaVKV~rP~i~~~i~~Dl~~l~~~~~~~~~~~~~~~~~~~~~~~~e~~~~l~ 200 (517) T Consensus 10 ~~~iG~G~fG~Vy~a~~~~~~~~~~~~~vAvK~l~~~~~------------------------------~---------- 49 (288) T cd05093 10 KRELGEGAFGKVFLAECYNLCPEQDKILVAVKTLKDASD------------------------------N---------- 49 (288) T ss_pred EEEECCCCCCEEEEEEEECCCCCCCCEEEEEEEECCCCH------------------------------H---------- T ss_conf 359804768299999980577687667999999587685------------------------------8---------- Q ss_pred HHHHHHHHHHHHHHHHCCCCCCCCCCCHHCCCHHCCCCEEEEECCCCCCCCHHHHHHH------------HCCCH---HH Q ss_conf 8865599998898720244677664300001022178335300247863242677332------------00225---68 Q gi|254780623|r 201 MEMDLRLEAAAFSEMAENTVKDQGFRVPKIDWNRTERDVITMEWIDGVKISDTEKLRA------------CGHDL---ER 265 (517) Q Consensus 201 ~ElD~~~Ea~n~~~~~~~~~~~~~v~vP~vy~~~st~~VLvmE~i~G~~i~d~~~l~~------------~~~d~---~~ 265 (517) T Consensus 50 ~~~~~~~E~~il~~l~Hp----nIV~~~g~~~~-~~~~~iv~Ey~~~G~L~~~l~~~~~~~~~~~~~~~~~~l~~~~~~~ 124 (288) T cd05093 50 ARKDFHREAELLTNLQHE----HIVKFYGVCVE-GDPLIMVFEYMKHGDLNKFLRAHGPDAVLMAEGNRPAELTQSQMLH 124 (288) T ss_pred HHHHHHHHHHHHHHCCCC----CCCCEEEEEEE-CCEEEEEEECCCCCCHHHHHHHCCCCCCCCCCCCCCCCCCHHHHHH T ss_conf 999999999999867998----87738789967-9989999980699908999987086410001357766689999999 Q ss_pred HHHHHHHHHHHHHHHCCEECCCCCCCEEEEECCCCEEEEECCHHEECC Q ss_conf 999999999998974486617878622898028953574340312169 Q gi|254780623|r 266 LSVTLVQSFLLHTLRDGFFHADLHPGNLFVDSKGYIVAVDMGITGRLS 313 (517) Q Consensus 266 la~~l~~~~~~qi~~~GfFHaDPHpGNi~v~~dg~i~~lDfG~vg~l~ 313 (517) T Consensus 125 i~~qia~gl-~yLH~~~iiHRDLKp~NILl~~~~~~Ki~DFGls~~~~ 171 (288) T cd05093 125 IAQQIAAGM-VYLASQHFVHRDLATRNCLVGENLLVKIGDFGMSRDVY 171 (288) T ss_pred HHHHHHHHH-HHHHHCCCCCCCCCCCEEEECCCCCEEEEECCCCCCCC T ss_conf 999999999-99844894678777132899999939982155573767

HHsearch alignment for GI: 254780623 and conserved domain: cd05093