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

by: Bin Li, Xu Huang, Jindong Zhao

FEBS Letters, Vol. 517, No. 1-3. (24 April 2002), pp. 87-91.

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biochempaper, cyanobacteria, heterocyst, hetn

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.

@article{citeulike:2774636, 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.}, author = {Li, Bin and Huang, Xu and Zhao, Jindong }, citeulike-article-id = {2774636}, doi = {10.1016/S0014-5793(02)02582-6}, journal = {FEBS Letters}, keywords = {biochempaper, cyanobacteria, heterocyst, hetn}, month = {April}, number = {1-3}, pages = {87--91}, posted-at = {2008-05-09 08:38:36}, priority = {0}, title = {Expression of hetN during heterocyst differentiation and its inhibition of hetR up-regulation in the cyanobacterium Anabaena sp. PCC 7120}, url = {http://dx.doi.org/10.1016/S0014-5793(02)02582-6}, volume = {517}, year = {2002} }

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TY - JOUR ID - citeulike:2774636 L3 - citeulike-article-id:2774636 TI - Expression of hetN during heterocyst differentiation and its inhibition of hetR up-regulation in the cyanobacterium Anabaena sp. PCC 7120 JF - FEBS Letters VL - 517 IS - 1-3 SP - 87 EP - 91 N2 - 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. KW - biochempaper KW - cyanobacteria KW - heterocyst KW - hetn AU - Li, Bin AU - Huang, Xu AU - Zhao, Jindong PY - 2002/04/24/ UR - http://dx.doi.org/10.1016/S0014-5793(02)02582-6 ER -

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