title: Transforming growth factor beta (TGF-beta) type V receptor has a TGF-beta-stimulated serine/threonine-specific autophosphorylation activity.
abstract: The transforming growth factor beta (TGF-beta) type V receptor, a newly identified high molecular weight TGF-beta receptor (M(r) approximately 400,000) has been purified from bovine liver plasma membranes (O'Grady, P., Kuo, M.-D., Baldassare, J. J., Huang, S. S., and Huang, J. S. (1991) J. Biol. Chem. 266, 8583-8589). The purified TGF-beta type V receptor underwent autophosphorylation at serine residues when incubated with [gamma-32P]ATP in the presence of 0.1% beta-mercaptoethanol and 2.5 mM MnCl2. This phosphorylation was stimulated by preincubation with TGF-beta. The preferred exogenous substrate for the Ser/Thr-specific phosphorylation activity of the type V receptor was found to be bovine casein. The TGF-beta type V receptor could be affinity-labeled with 5'-p-[adenine-8-14C]fluorosulfonylbenzoyl adenosine. Polylysine appeared to stimulate the autophosphorylation of the TGF-beta type receptor in the presence of [gamma-32P]ATP and the incorporation of 5'-p-[adenine-8-14C]fluorosulfonylbenzoyl adenosine into the TGF-beta type V receptor. The amino acid sequence analysis of the peptide fragments produced by cyanogen bromide cleavage of the purified TGF-beta type V receptor revealed that a peptide, namely CNBr-19, contained an amino acid sequence which shows homology to the putative ATP binding site of the receptors for activin, the Caenorhabditis elegans daf-1 gene product, and TGF-beta type II receptor (Lin, H. Y., Wang, Y.-F., Ng-Eaton, E., Weinberg, R. A., and Lodish, H. F. (1992) Cell 68, 775-785). These results suggest that the TGF-beta type V receptor is a Ser/Thr-specific protein kinase and belongs to the new class of membrane receptors associated with a Ser/Thr-specific protein kinase activity.
authors.affiliation: Department of Biochemistry and Molecular Biology, St. Louis University School of Medicine, Missouri 63104.
authors.forename: P
authors.initials: P
authors.lastname: O'Grady
authors.forename: Q
authors.initials: Q
authors.lastname: Liu
authors.forename: S S
authors.initials: SS
authors.lastname: Huang
authors.forename: J S
authors.initials: JS
authors.lastname: Huang
mesh_terms: D000241:Adenosine / Q000031:analogs & derivatives / Q000378:metabolism; D000255:Adenosine Triphosphate / Q000378:metabolism; D000345:Affinity Labels / Q000378:metabolism; D000595:Amino Acid Sequence; D000818:Animals; D001665:Binding Sites; D002364:Caseins / Q000378:metabolism; D002417:Cattle; D002462:Cell Membrane / Q000378:metabolism; D002712:Chlorides; D003488:Cyanogen Bromide; D004591:Electrophoresis, Polyacrylamide Gel; D006801:Humans; D008099:Liver / Q000378:metabolism*; D008345:Manganese / Q000494:pharmacology; D017895:Manganese Compounds; D008623:Mercaptoethanol / Q000494:pharmacology; D008969:Molecular Sequence Data; D010446:Peptide Fragments / Q000302:isolation & purification; D010766:Phosphorylation; D017346:Protein Serine-Threonine Kinases / Q000302:isolation & purification / Q000378:metabolism*; D011956:Receptors, Cell Surface / Q000187:drug effects / Q000302:isolation & purification / Q000378:metabolism*; D018125:Receptors, Transforming Growth Factor beta; D017386:Sequence Homology, Amino Acid; D016212:Transforming Growth Factor beta / Q000494:pharmacology*
chemical_list: D000345:Affinity Labels; D002364:Caseins; D002712:Chlorides; D017895:Manganese Compounds; D010446:Peptide Fragments; D011956:Receptors, Cell Surface; D018125:Receptors, Transforming Growth Factor beta; D016212:Transforming Growth Factor beta; D008345:Manganese; D008623:Mercaptoethanol; C010959:5'-(4-fluorosulfonylbenzoyl)adenosine; D000255:Adenosine Triphosphate; D017346:Protein Serine-Threonine Kinases; D000241:Adenosine; D003488:Cyanogen Bromide; C025340:manganese chloride