Kawanami S, Conti-Tronconi B, Racs J, Raftery MA. Isolation and characterization of nicotinic acetylcholine receptor-like protein from fetal calf thymus.
J Neurol Sci 1988;
87:195-209. [PMID:
3210032 DOI:
10.1016/0022-510x(88)90245-6]
[Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A nicotinic acetylcholine receptor-like protein (AChR-LP) was isolated from fetal calf thymus by affinity chromatography using cobrotoxin-Sepharose after alkaline extraction and solubilization with Triton X-100. The AChR-LP had a specificity of 1.61 +/- 1.12 nmol of alpha-bungarotoxin binding sites per mg of protein. The isoelectric point, sedimentation coefficient and amino acid composition of the purified AChR-LP were very similar to those of muscle and electric organ AChRs. Upon SDS-polyacrylamide gel electrophoresis purified thymus AChR-LP preparations contained up to 6 polypeptide bands of molecular weights of 40,000, 43,000, 51,000, 56,000, 58,000, and 66,000, respectively. The peptides of 40,000, 51,000, 56,000, and 66,000 dalton cross-reacted with the four subunits of Torpedo californica and fetal calf muscle AChR.
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