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Myosin filament depolymerizes in a low ionic strength solution containing L-histidine
被引:43
|作者:
Hayakawa, T.
[1
]
Ito, T.
[2
]
Wakamatsu, J.
[1
]
Nishimura, T.
[1
]
Hattori, A.
[1
]
机构:
[1] Hokkaido Univ, Meat Sci Lab, Grad Sch Agr, Kita Ku, Sapporo, Hokkaido 0608589, Japan
[2] Hokkaido Univ, Elect Microscope Lab, Grad Sch Agr, Kita Ku, Sapporo, Hokkaido 0608589, Japan
基金:
日本学术振兴会;
关键词:
Myosin;
L-histidine;
Filament formation;
Solubilization of protein;
LIGHT-MEROMYOSIN;
MUSCLE PROTEINS;
SOLUBILITY;
ROD;
D O I:
10.1016/j.meatsci.2009.11.010
中图分类号:
TS2 [食品工业];
学科分类号:
0832 ;
摘要:
Myosin, one of the major myofibrillar proteins, forms a filamentous polymer and is insoluble in physiological and low ionic strength solutions. We have shown that myosin is soluble in a low ionic strength solution containing L-histidine. In this study, to clarify the role of L-histidine in the solubilization of myosin, we investigated effects of L-histidine on the filament formation and the morphology of myosin at a low ionic strength. In the presence of L-histidine, myosin formed a filamentous polymer in a physiological ionic strength solution and dispersed in a low ionic strength solution. Transmission electron microscopy showed that light meromyosin (LMM), the rod region of myosin, in a low ionic strength solution containing L-histidine was longer than that in a high ionic strength solution without L-histidine. L-histidine causes the elongation of LMM region of myosin contributing to the weakening of the myosin filament and the dissociation of myosin in a low ionic strength solution. (C) 2009 Elsevier Ltd. All rights reserved.
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页码:742 / 746
页数:5
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