CHARACTERIZATION OF PROTEASOMES ISOLATED FROM RAT-LIVER

被引:7
|
作者
RIVETT, AJ
机构
[1] Department of Biochemistry, University of Leicester
关键词
PROTEASOMES; STRUCTURE; RNA CONTENT; SUBCELLULAR LOCALIZATION; CONFORMATIONAL CHANGES; CATALYTIC COMPONENTS; INHIBITORS; OXIDIZED PROTEIN SUBSTRATES;
D O I
10.1159/000468680
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
Proteasomes are cylindrical particles which have a pseudo-helical arrangement of subunits. On 2D-PAGE gels, rat liver proteasome preparations give rise to up to 25 proteins which are encoded by at least 16 different genes that are all members of the same family. Proteasomes are able to degrade protein substrates to acid soluble peptides. They have at least five different catalytic components which can be distinguished by the use of synthetic peptide substrates and inhibitors which have very different reactivity at the different sites. Proteasomes can undergo conformational changes when treated with various effecters of their multiple peptidase activities. They are found in the nucleus and in the cytoplasm and, in cultured cells, show changes in localization during the course of the cell cycle.
引用
收藏
页码:210 / 219
页数:10
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