PROTEIN-KINASE-C IN RAT-BRAIN SYNAPTOSOMES - BETA-II-SUBSPECIES AS A MAJOR ISOFORM ASSOCIATED WITH MEMBRANE-SKELETON ELEMENTS

被引：23
|
作者：
TANAKA, S [1 ]
TOMINAGA, M [1 ]
YASUDA, I [1 ]
KISHIMOTO, A [1 ]
NISHIZUKA, Y [1 ]
机构：
[1] KOBE UNIV, BIOSIGNAL RES CTR, KOBE 657, JAPAN
来源：
FEBS LETTERS | 1991年 / 294卷 / 03期
基金：
日本科学技术振兴机构;
关键词：
PROTEIN KINASE-C; SYNAPTOSOME; MEMBRANE-SKELETON; GROWTH-ASSOCIATED PROTEIN-43; RAT BRAIN;
D O I：
10.1016/0014-5793(91)81445-E
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：
A small fraction (approximately 5%) of protein kinase C (PKC) in the adult rat brain synaptosomes is tightly associated with Triton X-100-insoluble components (most likely membrane-skeleton elements), and is solubilized only after denaturation with sodium dodecyl sulfate. The kinase domain of this PKC can be released as a soluble form after limited proteolysis with calpain, whereas the regulatory domain which binds phorbol ester remains insoluble. The PKC in this fraction was identified as the beta-II-subspecies or its related molecule. Presumably, this enzyme subspecies is responsible for the phosphorylation of a major PKC substrate protein, growth-associated protein-43, which is located in nerve endings as well as in growth cones in association with the membrane-skeleton elements.
引用
收藏
页码：267 / 270
页数：4
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