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Article

Synthesis of nitrogenase in mutants of the cyanobacterium Anabaena sp. strain PCC 7120 affected in heterocyst development or metabolism.

Journal of bacteriology - 1 Oct 1992

Ernst A, Black T, Cai Y, Panoff J M, Tiwari D N, Wolk C P

Abstract excerpt

Mutants of Anabaena sp. strain PCC 7120 that are incapable of sustained growth with air as the sole source of nitrogen were generated by using Tn5-derived transposons. Nitrogenase was expressed only in mutants that showed obvious morphological signs of heterocyst differentiation. Even under rigorously anaerobic conditions, nitrogenase was not synthesized in filaments that were unable to develop heterocysts. These...

Topics

Anabaena
Anaerobiosis
Blotting, Western
DNA Transposable Elements
Dinitrogenase Reductase
Enzyme Stability
Gene Expression Regulation, Enzymologic
Morphogenesis
Mutagenesis, Insertional
Nitrogen

Methodology Data sources Editorial policy Privacy About Contact Helena Bioinformatics

Nitrogenase

Oxygen

Oxygen Consumption

Phenotype

Source

Open in PubMed Open full text

Identifiers

PMID: 1328150
DOI: 10.1128/jb.174.19.6025-6032.1992
PMCID: PMC207667

Provenance

PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 29 Aug 2026. Prepared record publication-1328150-2026-08-29.1. Manifest publication-graph-cohort-2026-08-29.1.

Source receipt: PubMed via Helena Literature Corpus, retrieved 29 Aug 2026.

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Synthesis of nitrogenase in mutants of the cyanobacterium Anabaena sp. strain PCC 7120 affected in heterocyst development or metabolism.PMID 1328150Read ↗

Isolation and complementation of nitrogen fixation mutants of the cyanobacterium Anabaena sp. strain PCC 7120.Semantic proximity Read ↗

The Anabaena sp. strain PCC 7120 asr1734 gene encodes a negative regulator of heterocyst development.Semantic proximity Read ↗

ABC-type neutral amino acid permease N-I is required for optimal diazotrophic growth and is repressed in the heterocysts of Anabaena sp. strain PCC 7120.Semantic proximity Read ↗

Heterocyst development and diazotrophic metabolism in terminal respiratory oxidase mutants of the cyanobacterium Anabaena sp. strain PCC 7120.Semantic proximity Read ↗

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A short-filament mutant of Anabaena sp. strain PCC 7120 that fragments in nitrogen-deficient medium.Semantic proximity Read ↗

Description of five mutants of the cyanobacterium Anabaena sp strain PCC 7120 affected in heterocyst differentiation and identification of the transposon-tagged genes.Semantic proximity Read ↗

Heterocyst-specific expression of patB, a gene required for nitrogen fixation in Anabaena sp. strain PCC 7120.Semantic proximity Read ↗

Anabaena sp. strain PCC 7120 gene devH is required for synthesis of the heterocyst glycolipid layer.Semantic proximity Read ↗

Nitrogen Fixation Mutants of the Actinobacterium Frankia Casuarinae CcI3.Semantic proximity Read ↗

Role of two NtcA-binding sites in the complex ntcA gene promoter of the heterocyst-forming cyanobacterium Anabaena sp. strain PCC 7120.Semantic proximity Read ↗

Morphological differentiation and nitrogen fixation in transposon generated mutants of Anabaena 7120.Semantic proximity Read ↗

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