Gene expression changes in group 2 sigma factor mutant, M-NM-^TsigCDE, in standard growth conditions and after high-light treatment

ABSTRACT: Adjustment of gene expression during acclimation to stress conditions, such as bright light, in the cyanobacterium Synechocystis sp. PCC 6803 depends on four group 2 M-OM-^C factors (SigB, SigC, SigD, SigE). A M-bM-^HM-^FsigCDE strain containing the stress responsive SigB as an only functional group 2 M-OM-^C factor appears twice as resistant to photoinhibition of photosystem II (PSII) as the control strain. Microarray analyzes of the M-bM-^HM-^FsigCDE strain indicated that 77 genes in standard conditions and 79 genes in high light were differently expressed compared to the control strain. Analysis of possible photoprotective mechanisms revealed that high carotenoid content and up-regulation of the photoprotective flavodiiron operon flv4-sll0218-flv2 protected PSII in M-bM-^HM-^FsigCDE, wh

ORGANISM(S): Synechocystis sp. PCC 6803

SUBMITTER: Taina Tyystjarvi 

PROVIDER: E-GEOD-50060 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress