Structural determination and characterization of a 40 kDa protein isolated from rat 40 S ribosomal subunit

FEBS Letters

Hayashi, Norio¹  Munakata, Hiroshi¹  Yonekura, Hideto¹  Okamoto, Hiroshi¹  Tohgo, Akira¹  Takasawa, Shin¹ 

[1] Department of Biochemistry, Tohoku University School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980, Miyagi, Japan

关键词: Ribosomal protein S2;    68 kDa laminin binding protein;    Amino acid sequence;    cDNA cloning;    Rat liver;   

DOI  :  10.1016/0014-5793(94)80188-6

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

We have purified a 40 kDa protein from the rat 40 S ribosomal subunit and determined its primary structure by amino acid and cDNA sequencing. The amino acid sequence of the 40 kDa protein shared 29–37% homology with prokaryotic ribosomal protein S2 of eubacteria and chloroplasts, indicating that the protein is a eukaryotic counterpart to prokaryotic S2. Moreover, the amino acid sequence shared 99% identity with those deduced from cDNAs for 68 kDa laminin binding proteins of human, murine and bovine origins. The cDNAs are capable of encoding polypeptides with predicted molecular mass of 33,000 which lacked typical signal sequences, N-linked glycosylation sites and putative transmembrane domains. These results indicate that the eDNAs for 68 kDa laminin binding proteins actually code for the 40 kDa ribosomal protein.

【 授权许可】

Unknown