Evidence for an ammonium transport system in free-living and symbiotic cyanobacteria

  title={Evidence for an ammonium transport system in free-living and symbiotic cyanobacteria},
  author={Amar Nath Rai and Peter Rowell and William D. P. Stewart},
  journal={Archives of Microbiology},
The free-living cyanobacterium Anabaena variabilis showed a biphasic pattern of 14CH3NH 3 + uptake. Initial accumulation (up to 60 s) was independent of CH3NH 3 + metabolism, but long-term uptake was dependent on its metabolism via glutamine synthetase (GS). The CH3NH 3 + was converted into methylglutamine which was not further metabolised. The addition of l-methionine-dl-sulphoximine (MSX), to inhibit GS, inhibited CH3NH 3 + metabolism, but did not affect the CH3NH 3 + transport system. NH 4… CONTINUE READING


Publications referenced by this paper.
Showing 1-10 of 41 references

Kashket ER (1983) Methylammonium uptake by Rhizobium sp. strain 32H1

  • JW Gober
  • J Bacteriol
  • 1983

Role of ammonia

  • MA Murry, DB Jensen, JR Benemann
  • 1983

Role of ammonia in regulation of nitrogenase synthesis and activity in Anabaena cylindriea

  • MA Murry, DB Jensen, Benemann
  • Biochim Biophys Acta
  • 1983

Nitrogen fixation - its current relevance and future potential

  • Stewart WDP
  • Israel J Bot
  • 1982

Similar Papers

Loading similar papers…