Synthesis of diadenosine 5′,5‴‐P1,P4‐tetraphosphate by organellar and cytoplasmic phenylalanyl‐tRNA synthetases of Euglena gracilis
- 1 August 1988
- journal article
- Published by Wiley in FEBS Letters
- Vol. 235 (1-2) , 275-277
- https://doi.org/10.1016/0014-5793(88)81278-x
Abstract
Purified phenylalanyl-tRNA synthetases present in chloroplasts, mitochondria and cytoplasm of green and bleached Euglena gracilis strains, respectively, are able to synthesize diadenosine 5′,5‴-P1,P4-tetraphosphate (Ap4A). Ap4A synthesis is strictly dependent on zinc ions. This is the first evidence that chloroplasts should be able to synthesize Ap4A. Synthesis of Ap4A by phenylalanyl-tRNA synthetases of the three compartments of a plant cell or by other enzymes such as Ap4A phosphorylase is discussed.Keywords
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