Predicted glycosyl transferase genes located outside the HEP island are required for formation of heterocyst envelope polysaccharide in Anabaena sp. strain PCC 7120

Yu Wang, Sigal Lechno-Yossef, Yangmin Gong, Qing Fan, C. Peter Wolk, Xudong Xu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

During maturation, heterocysts form an envelope layer of polysaccharide, called heterocyst envelope polysaccharide (HEP), whose synthesis depends on a cluster of genes, the HEP island, and on an additional, distant gene, hepB, or a gene immediately downstream from hepB. We show that HEP formation depends upon the predicted glycosyl transferase genes all4160 at a third locus and alr3699, which is adjacent to hepB and is cotranscribed with it. Mutations in the histidine kinase genes hepN and hepK appear to silence the promoter of hepB and incompletely down-regulate all4160.

Original languageEnglish (US)
Pages (from-to)5372-5378
Number of pages7
JournalJournal of bacteriology
Volume189
Issue number14
DOIs
StatePublished - Jul 2007

ASJC Scopus subject areas

  • Microbiology
  • Molecular Biology

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