Simian Virus 40 Large Tumor Antigen: a "RNA Binding Protein"?

Overview

Journal Proc Natl Acad Sci U S A

Specialty Science

Date 1982 Feb 1

PMID 6175963

Citations 11

Authors

E W Khandjian

M Loche

J L Darlix

R Cramer

H Turler

R Weil

Affiliations

Soon will be listed here.

Abstract

Simian virus 40 large tumor antigen was isolated by immunoaffinity chromatography from monkey or mouse cell cultures undergoing lytic or transforming infection. RNase-treated gel-purified large tumor antigen, on hydrolysis with alkali, gave about equimolar amounts of AMP, GMP, CMP, and UMP. Furthermore, RNA fragments of approximately 45 nucleotides could be isolated from large tumor antigen purified by the same procedure. Mapping of the T1 oligonucleotides showed a high complexity, as indicated by the presence of unique sequences of 15-30 nucleotides and of poly(A). This is compatible with the hypothesis that these RNA fragments are derived from cellular pre-mRNAs or mRNAs. Our results suggest that Simian virus 40 large tumor antigen is a RNA-binding protein and might possibly be involved in regulation of synthesis, maturation, or translation of cellular mRNAs.

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