Summary
From a gene bank ofS. pombe DNA, a 5.6 kb clone was isolated which complemented mutants defective in glutamine synthetase (GS) activity. Sub-cloning fragments of this 5.6 kb clone showed that the complementing activity was localised in a 1.6 kb HindIII-Aval fragment and a partial DNA sequence revealed an open reading frame preceded by TATA sequences and a TGACTA sequence. Plasmid constructs carrying up to 3.4 kb of DNA used to transformgln − strains gave transformants which showed a wide range of GS activity, in some cases 100 times the wild-type level. These constructs identify DNA sequences lying downstream from the putative coding sequence which have effects on the total amount of enzyme activity, but do not affect the control imposed by the nitrogen source on which the cells are grown.
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Barel, I., Bignell, G., Simpson, A. et al. Isolation of a DNA fragment which complements glutamine synthetase deficient strains ofS. pombe . Curr Genet 13, 487–494 (1988). https://doi.org/10.1007/BF02427754
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DOI: https://doi.org/10.1007/BF02427754