Dependence of the length of the heavy chain of chymotryptic subfragment 1 on the temperature of myosin digestion

FEBS Letters

Rȩdowicz, Maria J.¹  Strzelecka-Gołaszewska, Hanna¹  Pliszka, Barbara¹ 

[1] Department of Muscle Biochemistry, Nencki Institute of Experimental Biology, 3 Pasteur Str., PL-02-093 Warsaw, Poland

关键词: Myosin;    Chymotryptic cleavage;    Temperature dependence;    Subfragment 1;    S1;    myosin subfragment 1;    HMM;    heavy meromyosin;    SDS-PAGE;    SDS-polyacrylamide gel electrophoresis;    1;    5-IAEDANS;    N-iodoacetyl-N′-(5-sulfo-1-naphthyl)ethylenediamine;   

DOI  :  10.1016/0014-5793(89)81211-6

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Limited digestion of filamentous myosin with chymotrypsin at 0°C in the absence of divalent cations generates two forms of subfragment 1 (S1), with heavy chains of 95 kDa and 98 kDa. The difference is at the C-terminal end of the chain. The 98 kDa form prevails, in contrast to the preparations obtained by digestion at room temperature which consist of the shorter species and only traces of the longer one. The results support the idea of a temperature-dependent conformational transition at the head-rod junctional region of the myosin heavy chain.

【 授权许可】

Unknown