An interferon‐induced protein with release factor activity is a tryptophanyl‐tRNA synthetase
- 30 March 1992
- journal article
- Published by Wiley in FEBS Letters
- Vol. 300 (2) , 162-166
- https://doi.org/10.1016/0014-5793(92)80187-l
Abstract
Interferon gamma induces expression of a protein termed IFP 53 according to its molecular weight of 53 kDa. IFP 53 shows significant sequence homology to rabbit peptide chain release factor as well as to bovine tryptophanyl-tRNA synthetase. IFP 53 has been shown to possess release factor activity for the UGA stop codon. We demonstrate here, by using a recombinant IFP 53 fusion protein, that IFP 53 tryptophanylates tRNA. These data indicate that IFP 53 is a protein with two activities: peptide chain termination and aminoacylation.Keywords
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