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Science. 1998 Oct 30;282(5390):935-8.

Heterocyst pattern formation controlled by a diffusible peptide.

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1
Department of Biology, Texas A&M University, College Station, TX 77843-3258, USA.

Abstract

Many filamentous cyanobacteria grow as multicellular organisms that show a developmental pattern of single nitrogen-fixing heterocysts separated by approximately 10 vegetative cells. Overexpression of a 54-base-pair gene, patS, blocked heterocyst differentiation in Anabaena sp. strain PCC 7120. A patS null mutant showed an increased frequency of heterocysts and an abnormal pattern. Expression of a patS-gfp reporter was localized in developing proheterocysts. The addition of a synthetic peptide corresponding to the last five amino acids of PatS inhibited heterocyst development. PatS appears to control heterocyst pattern formation through intercellular signaling mechanisms.

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PMID:
9794762
[Indexed for MEDLINE]
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