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. 1970 Nov;67(3):1207-13.
doi: 10.1073/pnas.67.3.1207.

Identification and origin of some chloroplast aminoacyl-tRNA synthetases and tRNAs

B J Reger, S A Fairfield, J L Epler, W E Barnett

Identification and origin of some chloroplast aminoacyl-tRNA synthetases and tRNAs

B J Reger et al. Proc Natl Acad Sci U S A. 1970 Nov.

Abstract

Light-grown, wild type Euglena gracilis contains two aminoacyl-tRNA synthetases for both phenylalanine and isoleucine. Only one of the two synthetases for each amino acid is found in isolated chloroplasts, as are the light-induced phenylalanine and isoleucine tRNAs. In each case the light-induced chloroplast tRNAs can only be acylated by the chloroplast synthetases. The chloroplast isoleucyl-tRNA synthetase is light-inducible and cannot be detected in dark-grown cells or in cells of the bleached mutant W(3)BUL. The presence of the chloroplast phenylalanyl-tRNA synthetase in W(3)BUL, which contains no chloroplast DNA or structure, indicates that this chloroplast enzyme is synthesized in the cytoplasm and is coded by nuclear genes.

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References

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