A venom peptide with a novel presynaptic blocking action View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1984-03

AUTHORS

Lynne M. Kerr, Doju Yoshikami

ABSTRACT

The venom of the fish-eating marine mollusc, Conus geographus, contains several neurotoxic peptides having different targets1–5. A novel peptide has recently been isolated from the venom of C. geographus by Drs B. M. Olivera and W. R. Gray and colleagues in our department (in preparation). We report here that this peptide, designated ωCgTX (omega C. geographus toxin), irreversibly blocks nerve stimulus-evoked release of transmitter at the frog skeletal neuromuscular junction. Experiments indicate that the toxin acts by preventing Ca2+ entry into the nerve terminal during the presynaptic action potential. Consistent with this is the demonstration that ωCgTX also irreversibly attenuates the Ca2+ component of the action potential in dorsal root ganglion (DRG) neurones from embryonic chick. ωCgTX thus provides a unique and potentially powerful probe for exploring the presynaptic terminal. More... »

PAGES

282-284

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/308282a0

DOI

http://dx.doi.org/10.1038/308282a0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1039676144

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/6608056


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