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Article

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

Molecular microbiology - 1 May 2007

Wu Xiaoqiang, Lee Dong W, Mella Rodrigo A, Golden James W

Abstract excerpt

The novel asr1734 gene of Anabaena (Nostoc) sp. strain PCC 7120 inhibited heterocyst development when present in extra copies. Overexpression of asr1734 inhibited heterocyst development in several strains including the wild type and two strains that form multiple contiguous heterocysts (Mch phenotype): a PatS null mutant and a hetR(R223W) mutant. Overexpression of asr1734 also caused increased nblA messenger RNA...

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PMID: 17462023
DOI: 10.1111/j.1365-2958.2007.05698.x

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-08.1.

Source receipt: pubmed, retrieved 7 Sept 2026.

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The Anabaena sp. strain PCC 7120 asr1734 gene encodes a negative regulator of heterocyst development.PMID 17462023Read ↗

A gene cluster that regulates both heterocyst differentiation and pattern formation in Anabaena sp. strain PCC 7120.Semantic proximity Read ↗

PatS and products of nitrogen fixation control heterocyst pattern.Semantic proximity Read ↗

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

Different functions of HetR, a master regulator of heterocyst differentiation in Anabaena sp. PCC 7120, can be separated by mutation.Semantic proximity Read ↗

Anabaena sp. strain PCC 7120 conR contains a LytR-CpsA-Psr domain, is developmentally regulated, and is essential for diazotrophic growth and heterocyst morphogenesis.Semantic proximity Read ↗

Mutual regulation of ntcA and hetR during heterocyst differentiation requires two similar PP2C-type protein phosphatases, PrpJ1 and PrpJ2, in Anabaena sp. strain PCC 7120.Semantic proximity Read ↗

NtcA-regulated heterocyst differentiation genes hetC and devB from Anabaena sp. strain PCC 7120 exhibit a similar tandem promoter arrangement.Semantic proximity Read ↗

Heterocyst pattern formation controlled by a diffusible peptide.Semantic proximity Read ↗

Heterocyst formation.Semantic proximity Read ↗

Functional Overlap of hetP and hetZ in Regulation of Heterocyst Differentiation in Anabaena sp. Strain PCC 7120.Semantic proximity Read ↗

ppGpp metabolism is involved in heterocyst development in the cyanobacterium Anabaena sp. strain PCC 7120.Semantic proximity Read ↗

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

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