Evidence that insulin increases the proportion of polysomes that are bound to the cytoskeleton in 3T3 fibroblasts

FEBS Letters

Hesketh, John E.²  Pryme, Ian F.¹ 

[1] Department of Biochemistry, University of Bergen, Årstadveien 19, N-5009 Bergen, Norway;Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB, Scotland

关键词: Ribosome;    Actin;    Insulin;    Protein synthesis;    Cytoskeleton;   

DOI  :  10.1016/0014-5793(88)80703-8

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The association of polysome redistribution with changes in protein synthesis was investigated in insulin-stimulated fibroblasts. Free polysomes were released by Nonidet-P40 and 25 mM KCl, cytoskeletal-bound polysomes were retained at 25 mM KCl but released at 130 mM, while membrane-bound polysomes were released by deoxycholate. Insulin increased the proportion of polysomes which were retained at 25 mM KCl but had no effect when extraction was carried out at 130 mM KCl, suggesting that more polysomes were associated with the cytoskeleton. Insulin also reduced the amount of actin released from the detergent-insoluble cytoskeleton indicating that the hormone affects microfilament organization.

【 授权许可】

Unknown