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. 1979 Oct;76(10):4788-92.
doi: 10.1073/pnas.76.10.4788.

An interferon-induced phosphodiesterase degrading (2'-5') oligoisoadenylate and the C-C-A terminus of tRNA

A Schmidt, Y Chernajovsky, L Shulman, P Federman, H Berissi, M Revel

An interferon-induced phosphodiesterase degrading (2'-5') oligoisoadenylate and the C-C-A terminus of tRNA

A Schmidt et al. Proc Natl Acad Sci U S A. 1979 Oct.

Abstract

A phosphodiesterase characterized by a generally higher activity on 2'-5' than on 3'-5' phosphodiester bonds was isolated from mouse L cells treated with interferon. A similar enzyme was purified from mouse reticulocytes. The phosphodiesterase 2'-PDi splits the 2'-phosphate bond of pppA2'p5'A2'p5'A, the oligonucleotide activator of ribonuclease F. The level of phosphodiesterase 2'-PDi is increased by interferon treatment of L cells. The phosphodiesterase was also shown to degrade the C-C-A terminus of tRNA and to reduce the amino acid acceptance of tRNA in cell-free extracts, thereby causing a tRNA-reversible inhibition of mRNA translation.

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