Cloning of an apamin binding protein of vascular smooth muscle |
| |
Authors: | Patricia T Sokol William Hu Lynda Yi Joyce Toral Manik Chandra and M Reza Ziai |
| |
Institution: | (1) Departments of Molecular Pharmacology and Investigative Toxicology, Medical Research Division, American Cyanamid Company, Lederle Laboratories, 10965 Pearl River, New York |
| |
Abstract: | The receptor for the bee venom derived neurotoxin, apamin, is widely believed to be an integral component of the small conductance calcium-activated potassium channel in many excitable cells. By affinity chromatography on immobilized apamin, a 78 kD apamin binding protein of the bovine brain synaptosomes was isolated. Antibodies were elicited against this protein and used to clone a cDNA from a porcine vascular smooth muscle expression library. This gene (Kcal 1.8) codes for a 438 amino protein with four potential transmembrane domains, one putative calcium binding site, a protein kinase C phosphorylation site, and a leucine zipper motif. Kcal 1.8 encoded protein has no significant sequence homologies with any known ion channels or receptors. Kcal 1.8 is likely to encode a protein associated with the small conductance calcium-activated potassium channel in vascular smooth muscle. |
| |
Keywords: | Apamin receptor cloning smooth muscle |
本文献已被 SpringerLink 等数据库收录! |
|