Title : Stimulation by growth hormone (GH) of GH receptor-associated tyrosine kinase activity.

Pub. Date : 1992 Mar

PMID : 1537311






12 Functional Relationships(s)
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1 We have shown previously that GH receptors (GHRs) become phosphorylated on tyrosyl residues when GH-responsive cells are exposed to GH. cyclo(tyrosyl-tyrosyl) growth hormone 1 Homo sapiens
2 We have shown previously that GH receptors (GHRs) become phosphorylated on tyrosyl residues when GH-responsive cells are exposed to GH. cyclo(tyrosyl-tyrosyl) growth hormone 1 Homo sapiens
3 In this work we investigate the molecular mechanism by which GH binding stimulates tyrosyl phosphorylation of GHR. cyclo(tyrosyl-tyrosyl) growth hormone 1 Homo sapiens
4 The rate of in vitro tyrosyl phosphorylation of GH-GHR complexes was not substantially reduced when the GHR preparation was diluted 1:10 or 1:100 before phosphorylation, consistent with a tight association between kinase and substrate (GHR). cyclo(tyrosyl-tyrosyl) growth hormone 1 Homo sapiens
5 When cells were labeled metabolically with 35S, and GHRs containing phosphorylated tyrosyl residues were isolated by immunoadsorption to and elution from phosphotyrosyl-binding antibody, the ability to immunoprecipitate 35S-labeled GHR with GHR antibodies was only evident when the cells had been incubated with GH. cyclo(tyrosyl-tyrosyl) growth hormone 1 Homo sapiens
6 This indicates that in vivo, GHRs are phosphorylated on tyrosyl residues only when GH is bound. cyclo(tyrosyl-tyrosyl) growth hormone 1 Homo sapiens
7 The increased tyrosyl phosphorylation of GHR detected after incubation of cells with GH is consistent either with GH increasing tyrosine kinase activity associated with the GHR or with GH inducing a conformational change in GHR that renders it susceptible to tyrosyl phosphorylation. cyclo(tyrosyl-tyrosyl) growth hormone 1 Homo sapiens
8 The increased tyrosyl phosphorylation of GHR detected after incubation of cells with GH is consistent either with GH increasing tyrosine kinase activity associated with the GHR or with GH inducing a conformational change in GHR that renders it susceptible to tyrosyl phosphorylation. cyclo(tyrosyl-tyrosyl) growth hormone 1 Homo sapiens
9 The increased tyrosyl phosphorylation of GHR detected after incubation of cells with GH is consistent either with GH increasing tyrosine kinase activity associated with the GHR or with GH inducing a conformational change in GHR that renders it susceptible to tyrosyl phosphorylation. cyclo(tyrosyl-tyrosyl) growth hormone 1 Homo sapiens
10 The increased tyrosyl phosphorylation of GHR detected after incubation of cells with GH is consistent either with GH increasing tyrosine kinase activity associated with the GHR or with GH inducing a conformational change in GHR that renders it susceptible to tyrosyl phosphorylation. cyclo(tyrosyl-tyrosyl) growth hormone 1 Homo sapiens
11 The increased tyrosyl phosphorylation of GHR detected after incubation of cells with GH is consistent either with GH increasing tyrosine kinase activity associated with the GHR or with GH inducing a conformational change in GHR that renders it susceptible to tyrosyl phosphorylation. cyclo(tyrosyl-tyrosyl) growth hormone 1 Homo sapiens
12 The increased tyrosyl phosphorylation of GHR detected after incubation of cells with GH is consistent either with GH increasing tyrosine kinase activity associated with the GHR or with GH inducing a conformational change in GHR that renders it susceptible to tyrosyl phosphorylation. cyclo(tyrosyl-tyrosyl) growth hormone 1 Homo sapiens