>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=98.47 E-value=1.3e-06 Score=70.30 Aligned_cols=141 Identities=15% Similarity=0.120 Sum_probs=85.4 Q ss_pred HHHHHHHHHHHHHHHEECCCCCC----EEEEEEECCHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCHHHHHHHHHHHHH Q ss_conf 66677888865555021288872----36876403104688777788999875321146854334691799999998878 Q gi|254780623|r 125 DPIAAASIAQVHPAVVHDINGYR----KVAVKIIRPGVRKRFFRDIQVMYLIARIQEKLLPSMRRLCFSAVVRALEQVTK 200 (517) Q Consensus 125 ePlasASiaQVh~A~l~d~~~g~----~VaVKV~rP~i~~~i~~Dl~~l~~~~~~~~~~~~~~~~~~~~~~~~e~~~~l~ 200 (517) T Consensus 13 k~iG~G~fG~Vy~g~~~~--~~~~~~~~vavK~l~~~~~~~~~------------------------------------- 53 (279) T cd05109 13 KVLGSGAFGTVYKGIWIP--DGENVKIPVAIKVLRENTSPKAN------------------------------------- 53 (279) T ss_pred EEEECCCCCEEEEEEECC--CCCEEEEEEEEEEECCCCCHHHH------------------------------------- T ss_conf 598017891999789918--99888689999998845798999------------------------------------- Q ss_pred HHHHHHHHHHHHHHHHCCCCCCCC-CCCHHCCCHHCCCCEEEEECCCCCCCCHHHHHHHHCCCHH---HHHHHHHHHHHH Q ss_conf 886559999889872024467766-4300001022178335300247863242677332002256---899999999999 Q gi|254780623|r 201 MEMDLRLEAAAFSEMAENTVKDQG-FRVPKIDWNRTERDVITMEWIDGVKISDTEKLRACGHDLE---RLSVTLVQSFLL 276 (517) Q Consensus 201 ~ElD~~~Ea~n~~~~~~~~~~~~~-v~vP~vy~~~st~~VLvmE~i~G~~i~d~~~l~~~~~d~~---~la~~l~~~~~~ 276 (517) T Consensus 54 --~~~~~E~~il~~l~h-----pnIv~~~g~~--~~~~~~lv~e~~~~G~L~~~l~~~~~~~~~~~~~~i~~qia~gl-~ 123 (279) T cd05109 54 --KEILDEAYVMAGVGS-----PYVCRLLGIC--LTSTVQLVTQLMPYGCLLDYVRENKDRIGSQDLLNWCVQIAKGM-S 123 (279) T ss_pred --HHHHHHHHHHHHCCC-----CCCCEEEEEE--EECCEEEEEEECCCCCHHHHHHHCCCCCCHHHHHHHHHHHHHHH-H T ss_conf --999999999986799-----9898099999--96890799997889978999985689999999999999999999-9 Q ss_pred HHHHCCEECCCCCCCEEEEECCCCEEEEECCHHEECCH Q ss_conf 89744866178786228980289535743403121698 Q gi|254780623|r 277 HTLRDGFFHADLHPGNLFVDSKGYIVAVDMGITGRLSK 314 (517) Q Consensus 277 qi~~~GfFHaDPHpGNi~v~~dg~i~~lDfG~vg~l~~ 314 (517) T Consensus 124 yLH~~~IiHrDlKp~NILi~~~~~~Ki~DFGls~~~~~ 161 (279) T cd05109 124 YLEEVRLVHRDLAARNVLVKSPNHVKITDFGLARLLDI 161 (279) T ss_pred HHHHCCEECCCCCCCCEEECCCCCEEEEECCCCCCCCC T ss_conf 99859901376573108988999399974477610678

HHsearch alignment for GI: 254780623 and conserved domain: cd05109