Document Detail

An approach to the study of intracellular proteins related to the excitability of the squid giant axon.
MedLine Citation:
PMID:  626756     Owner:  NLM     Status:  MEDLINE    
The technique for covalently labeling proteins with 125I-labelled Bolton-Hunter reagent was used to determine the quantities of proteins released from the axoplasmic side of the squid axon membrane. The reagent could be introduced into the interior of the axon by the technique of intracellular perfusion, the radioiodination reaction being carried out in situ. Alternatively, the reaction could be carried out in vitro, i.e., by mixing the reagent with samples of proteins dissolved in the intracellular perfusion fluid collected from the axon. This technique was found to be sensitive enough to permit analysis of a large number of protein samples collected from a single axon. By the method of sodium dodecyl sulfate polyacrylamide gel electrophoresis, it was found that proteins of approx. 56 000 daltons were released into the perfusate when a solution of potassium chloride or potassium bromide was introduced into the interior of an axon. Suppression of axonal excitability was associated with this release of proteins. The significance of these findings in relation to the structure and function of the axon is discussed.
T Yoshioka; H C Pant; I Tasaki; J Baumgold; G Matsumoto; H Gainer
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Biochimica et biophysica acta     Volume:  538     ISSN:  0006-3002     ISO Abbreviation:  Biochim. Biophys. Acta     Publication Date:  1978 Feb 
Date Detail:
Created Date:  1978-04-26     Completed Date:  1978-04-26     Revised Date:  2005-11-17    
Medline Journal Info:
Nlm Unique ID:  0217513     Medline TA:  Biochim Biophys Acta     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  616-26     Citation Subset:  IM    
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MeSH Terms
Action Potentials
Axons / physiology*
Bromides / pharmacology
Fluorides / pharmacology
Intracellular Fluid
Molecular Weight
Nerve Tissue Proteins / metabolism*
Potassium Chloride / pharmacology
Thiocyanates / pharmacology
Reg. No./Substance:
0/Bromides; 0/Fluorides; 0/Nerve Tissue Proteins; 0/Phenylpropionates; 0/Thiocyanates; 7447-40-7/Potassium Chloride; EC 3.4.24.-/Pronase

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