Imesch E, Nef P, Giacobino JP. Study in pig coronary smooth muscle cell subcellular fractions of the activity of various enzymes involved in lipid metabolism and of the beta-receptor adenylate cyclase couple.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. B, COMPARATIVE BIOCHEMISTRY 1984;
77:501-6. [PMID:
6325084 DOI:
10.1016/0305-0491(84)90265-7]
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Abstract
Pig coronary smooth muscle cells contain a highly active fatty acid beta-oxidation system as well as significant activities of other enzymes involved in lipid metabolism, i.e. palmitoyl-CoA synthetase, glycerophosphate acyl transferase, acetyl-CoA carboxylase and fatty acid synthetase. Purified plasma membranes of pig coronary smooth muscle cells contain stereospecific (-)-[3H]dihydroalprenolol binding sites of high affinity (Kd = 5.4 nM) and characteristic of the beta 1 subtype. They also contain an adenylate cyclase activity which is stimulated by 5'-guanylyl-imidodiphosphate (Gpp(NH)p) and, to a lesser degree, by (-)-isoproterenol.
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