Affiliation:
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.
Publisher
American Association for the Advancement of Science (AAAS)
Cited by
354 articles.
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