ras proteins enhance the phosphorylation of a 38 kDa protein (p38) in rat liver plasma membrane

FEBS Letters

Das, M.R.¹  Hegde, Ashok N.¹ 

[1]Centre for Cellular & Molecular Biology, Uppal Road, Hyderabad 500 007, India

关键词: 38 kDa protein;    ras protein;    Phosphorylation;    (Rat liver plasma membrane);   

DOI  :  10.1016/0014-5793(87)81246-2

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Phosphorylation of a 38 kDa protein (p38) present in rat liver plasma membrane has been shown for the first time to be enhanced by ras proteins. This increase in phosphorylation is about 3–16-fold depending on the incubation time and the type of ras protein used. Acid treatment removes phosphate from this protein suggesting that the phosphorylation involves phosphoramidate derivatives of basic amino acids. Experiments carried out in the presence of diethylpyrocarbonate suggest that the phosphorylation occurs on (a) histidine residue(s). It is probable that the function of p38 in the cell is modulated by ras proteins through phosphorylation. The significance of phosphorylation of p38 in terms of malignant transformation is presently unknown.

【 授权许可】

Unknown