Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
FEBS Lett. 2002 Apr 24;517(1-3):87-91.

Expression of hetN during heterocyst differentiation and its inhibition of hetR up-regulation in the cyanobacterium Anabaena sp. PCC 7120.

Author information

  • 1College of Life Sciences, Peking University, Beijing, PR China.

Abstract

The hetN gene plays an important role in heterocyst differentiation and pattern formation. An immunoblotting study showed that the hetN gene in Anabaena sp. PCC 7120 was expressed in vegetative cells grown with combined nitrogen. After a switch to a medium without combined nitrogen, hetN expression first declined and was then followed by a rapid increase in its product, HetN, which was only present in mature heterocysts. HetN is located on both thylakoid membranes and plasma membranes as determined by immunoblotting using purified membranes. Overexpression of hetN completely prevented hetR up-regulation under nitrogen-deprivation conditions, suggesting that its role in pattern control may depend on its inhibition of hetR expression.

PMID:
12062415
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Loading ...
    Write to the Help Desk