Interaction of muscle glycogen phosphorylase b reconstituted from apoenzyme and analogs of pyridoxal-5'-phosphate with specific ligands

被引:0
|
作者
Chebotareva, NA [1 ]
Sugrobova, NP [1 ]
Bulanova, LN [1 ]
Poznanskaya, AA [1 ]
Kurganov, BI [1 ]
Gunar, VI [1 ]
机构
[1] RUSSIAN ACAD SCI,BAKH INST BIOCHEM,MOSCOW 117071,RUSSIA
来源
关键词
glycogen phosphorylase b; reconstitution with PLP; self-association; inhibition by FMN; analogs of PLP;
D O I
暂无
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
Phosphorylase b from rabbit skeletal muscles was reconstituted with analogs of PLP containing residues -CH2-CH2-COOH, trans-CH=CH-COOH or -C=COOH at position 5. Replacing native coenzyme in the phosphorylase molecule with any PLP analog tested leads to the decrease in the enzyme affinity for the allosteric inhibitor, FMN. Phosphorylase b reconstituted with analogs of PLP shows the greater ability for association in tetramers in the presence of 1 mM AMP than native enzyme.
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页码:1033 / 1040
页数:8
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