Mammalian alpha 1-adrenergic receptor. Purification and characterization of the native receptor ligand binding subunit.

Détails

ID Serval
serval:BIB_162FE6293B67
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Mammalian alpha 1-adrenergic receptor. Purification and characterization of the native receptor ligand binding subunit.
Périodique
Journal of Biological Chemistry
Auteur(s)
Lomasney J.W., Leeb-Lundberg L.M., Cotecchia S., Regan J.W., DeBernardis J.F., Caron M.G., Lefkowitz R.J.
ISSN
0021-9258 (Print)
ISSN-L
0021-9258
Statut éditorial
Publié
Date de publication
1986
Peer-reviewed
Oui
Volume
261
Numéro
17
Pages
7710-7716
Langue
anglais
Résumé
alpha 1-Adrenergic receptors from a cultured smooth muscle cell line (DDT1 MF-2) have been solubilized with digitonin and purified to apparent homogeneity by sequential chromatography on a biospecific affinity support (Sepharose-A55453 (4-amino-6,7-dimethoxy-2-[4-[5-(4-amino-3-phenyl) pentanoyl]-1-piperazinyl]-quinazoline), an alpha 1 receptor-selective antagonist), a wheat germ agglutinin-agarose gel, and a high performance steric exclusion liquid chromatography column. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis and autoradiography of iodinated purified receptor preparations reveals a peptide with an apparent Mr = 80,000 that co-migrates with the peptide labeled by the specific alpha 1-adrenergic receptor photoaffinity probe 4-amino-6,7-dimethoxy-2-[4-[5-(4-azido-3-[125I]iodophenyl)pentanoyl] -1-piperazinyl] quinazoline. The specific activity (approximately 13,600 pmol of ligand binding/mg of protein) of purified receptor preparations is consistent with that expected for a pure peptide of Mr = 80,000 containing a single ligand binding site. Overall yields approximate 14% of initial crude particulate binding. The purified receptor preparations bind agonist and antagonist ligands with appropriate alpha 1-adrenergic specificity, stereoselectivity, and affinity. Peptide maps of the pure alpha 1-adrenergic receptor and the pure human platelet alpha 2-adrenergic receptor (Regan, J.W., Nakata, H., DeMarinis, R.M., Caron, M.G., and Lefkowitz, R.J. (1986) J. Biol. Chem. 261, 3894-3900) using several different proteases suggest that these two receptors show little if any structural homology.
Mots-clé
Animals, Binding, Competitive, Cell Line, Cell Membrane/metabolism, Kinetics, Ligands, Macromolecular Substances, Molecular Weight, Muscle, Smooth, Peptide Fragments/analysis, Receptors, Adrenergic, alpha/isolation & purification, Receptors, Adrenergic, alpha/metabolism
Pubmed
Web of science
Création de la notice
24/01/2008 11:05
Dernière modification de la notice
20/08/2019 12:45
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