The influence of acetyl phosphate on DspA signalling in the Cyanobacterium Synechocystis sp. PCC6803.

ABSTRACT:

Background

The dspA (hik33) gene, coding for a putative sensory histidine kinase, is conserved in plastids (ycf26) and cyanobacteria. It has been linked with a number of different stress responses in cyanobacteria.

Results

We constructed an insertional mutant of dspA (ycf26) in Synechocystis 6803. We found little phenotypic effect during nitrogen starvation. However, when the mutation was combined with deletion of the pta gene coding for phosphotransacetylase, a more significant phenotype was observed. Under nitrogen starvation, the pta/dspA double mutant degrades its phycobilisomes less than the wild type and still has about half of its chlorophyll-protein complexes.

Conclusion

Our data indicates that acetyl-phosphate-dependent phosphorylation of response regulator(s

SUBMITTER: Morrison SS 

PROVIDER: S-EPMC1192802 | biostudies-literature | 2005 Aug

REPOSITORIES: biostudies-literature