ISSN:
1420-9071
Keywords:
Frog skeletal single fibres
;
phenylglyoxal (PGO)
;
E-C coupling
;
solubilization
;
PGO-binding protein (PGO-protein)
;
monoclonal antibody
;
electrometrin
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Abstract The excitation-contraction (E-C) coupling process in single twitch fibres from frog toe muscle was inhibited selectively by phenylglyoxal (PGO), a specific guanidyl modifying reagent. A new protein (31.5 kDa), which has PGO-binding ability and seems to play a key role in the E-C coupling process, was solubilized from transverse tubule membrane-junctional sarcoplasmic reticulum complexes (TTM-JSR) of frog skeletal muscles, using14C-PGO. The monoclonal antibody against this protein applied extracellularly inhibited the E-C coupling process of the single fibres. This protein appears to constitute the very first step of input for E-C coupling. It is considered to behave as an indispensable part of an ‘electrometer’ to measure membrane potentials. Therefore, the name ‘electrometrin’ is suggested for the new protein.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01989418
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