Abstract
The KdpB polypeptides in the cyanobacterium Anabaena torulosa were shown to be two membrane-bound proteins of about 78 kDa, expressed strictly under K(+) deficiency and repressed or degraded upon readdition of K(+). In both Anabaena and Escherichia coli strain MC4100, osmotic and ionic stresses caused no significant induction of steady-state KdpB levels during extreme potassium starvation.
MeSH terms
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Adenosine Triphosphatases / genetics
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Adenosine Triphosphatases / metabolism*
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Anabaena / enzymology*
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Anabaena / genetics
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Anabaena / growth & development
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Carrier Proteins / genetics
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Carrier Proteins / metabolism*
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Cation Transport Proteins*
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Culture Media
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Escherichia coli Proteins*
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Gene Expression Regulation, Bacterial*
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Nitrogen / metabolism
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Nitrogen Fixation
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Potassium / pharmacology*
Substances
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Carrier Proteins
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Cation Transport Proteins
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Culture Media
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Escherichia coli Proteins
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Adenosine Triphosphatases
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potassium translocating Kdp-ATPase, E coli
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Nitrogen
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Potassium