A cytoplasmic‐membrane protein repressible by ammonium in Synechococcus R2: altered expression in nitrate‐assimilation mutants
- 7 November 1988
- journal article
- Published by Wiley in FEBS Letters
- Vol. 239 (2) , 289-291
- https://doi.org/10.1016/0014-5793(88)80936-0
Abstract
A protein of ∼48 kDa was present in the cytoplasmic membrane of cells of Synechococcus R2 grown on nitrate or incubated in the absence of combined nitrogen, but not in ammonium‐grown cells. The level of this polypeptide was diminished in mutant strains that also exhibit reduced levels of other components of the nitrate‐reductive system. On the other hand, a mutant constitutive for nitrate uptake also synthesized constitutively the 48 kDa protein.Keywords
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