Cryoinactivation and conformational drift of glyceraldehyde-3-phosphate dehydrogenase from rabbit muscle

被引:3
|
作者
Tian, SM [1 ]
Ruan, KC [1 ]
机构
[1] Acad Sinica, Shanghai Inst Biochem, Shanghai 200031, Peoples R China
基金
中国国家自然科学基金;
关键词
conformational drift; cryoinactivation; glyceraldehyde-3-phosphate dehydrogenase;
D O I
10.1515/bchm.1998.379.11.1319
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The cryoinactivation of glyceraldehyde-3-phosphate dehydrogenase from rabbit muscle (GAPDH-rabbit) was studied. It was found that the inactivation of GAPDH-rabbit at 0 degrees C was much faster than that of GAPDH from yeasts, and showed obvious time and concentration dependence. The spectral properties, enzyme activity and behavior under pressure, of GAPDH-rabbit treated either by cryoinactivation, or pressure-induced dissociation and reassociation, were very similar. These results provided evidence to support the idea that cryoinactivation of oligomeric proteins, might take place through a cycle of dissociation-reassociation accompanied with the so-called conformational drift postulated by King and Weber (1986).
引用
收藏
页码:1319 / 1322
页数:4
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