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  • Title: Rabies virus binding to the nicotinic acetylcholine receptor alpha subunit demonstrated by virus overlay protein binding assay.
    Author: Gastka M, Horvath J, Lentz TL.
    Journal: J Gen Virol; 1996 Oct; 77 ( Pt 10)():2437-40. PubMed ID: 8887475.
    Abstract:
    A virus overlay protein binding assay was used to study binding of 125I-labelled rabies virus to the acetylcholine receptor (AChR) from Torpedo californica electric organ membranes. After gel electrophoresis of electric organ membranes and transfer of proteins to nitrocellulose, 125I-labelled alpha-bungarotoxin, a curaremimetic neurotoxin, bound to a 40 kDa band and 125I-labelled rabies virus bound to 51 kDa and 40 kDa bands. Binding of rabies virus to the 40 kDa band was inhibited by unlabelled alpha-bungarotoxin. In blots of affinity-purified AChR, labelled virus bound to the 40 kDa alpha subunit and was competed by alpha-bungarotoxin. Based on binding of rabies virus to the alpha subunit and the ability of alpha-bungarotoxin to compete for binding, rabies virus appears to bind to the neurotoxin-binding site of the nicotinic AChR alpha subunit.
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