The hierarchy of transition metal homeostasis: Iron controls manganese accumulation in a unicellular cyanobacterium.

ABSTRACT: Iron and manganese are part of a small group of transition metals required for photosynthetic electron transport. Here, we present evidence for a functional link between iron and manganese homeostasis. In the unicellular cyanobacterium, Synechocystis sp. PCC 6803 Fe and Mn deprivation resulted in distinct modifications of the function of the photosynthetic apparatus. For example, iron limitation modifies the rate of QA re-oxidation in photosystem II, a complex that contains more Mn than Fe. The intracellular elemental quotas of Fe and Mn are also linked. Fe limitation reduces the intracellular Mn quota. Mn limitation did not exert a reciprocal effect on Fe quotas. Microarray analysis comparing Mn and Fe limitation revealed a stark difference in the extent of the transcriptional response to

ORGANISM(S): Synechocystis sp. PCC 6803

SUBMITTER: Jens Georg 

PROVIDER: E-GEOD-48416 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress