Role of sigma factors in controlling global gene expression in light/dark transitions in the cyanobacterium Synechocystis sp. strain PCC 6803.

ABSTRACT: We report on differential gene expression in the cyanobacterium Synechocystis sp. strain PCC 6803 after light-dark transitions in wild-type, DeltasigB, and DeltasigD strains. We also studied the effect of day length in the presence of glucose on a DeltasigB DeltasigE mutant. Our results indicated that the absence of SigB or SigD predominately altered gene expression in the dark or in the light, respectively. In the light, approximately 350 genes displayed transcript levels in the DeltasigD strain that were different from those of the wild type, with over 200 of these up-regulated in the mutant. In the dark, removal of SigB altered more than 150 genes, and the levels of 136 of these were increased in the mutant compared to those in the wild type. The removal of both SigB and SigE had a majo

SUBMITTER: Summerfield TC 

PROVIDER: S-EPMC2168720 | biostudies-literature | 2007 Nov

REPOSITORIES: biostudies-literature