Regulation of Potassium-Dependent Kdp-ATPase Expression in the Nitrogen-Fixing Cyanobacterium Anabaena torulosa

Author:

Alahari Anuradha1,Ballal Anand1,Apte Shree Kumar1

Affiliation:

1. Cell Biology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India

Abstract

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.

Publisher

American Society for Microbiology

Subject

Molecular Biology,Microbiology

Reference38 articles.

1. A Kdp-like, high affinity, K+-translocating ATPase is expressed during growth of Rhodobacter sphaeroides in low potassium media;Abee T.;Arch. Microbiol.,1992

2. Pleiotropic effects of potassium deficiency in a heterocystous, nitrogen-fixing cyanobacterium, Anabaena torulosa;Alahari A.;Microbiology,1998

3. Kdp-ATPase of Escherichia coli;Altendorf K.;Cell Physiol. Biochem.,1993

4. The sensor kinase KdpD and the response regulator KdpE control expression of the kdpFABC operon in Escherichia coli;Altendorf K.;Res. Microbiol.,1994

5. Role of alkali cations (K+ and Na+) in cyanobacterial nitrogen fixation and adaptation to salinity and osmotic stress;Apte S. K.;Indian J. Biochem. Biophys.,1994

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