- A-Z
- Endocytobiosis and ...
- Volume 22 (2012)
- IRON HOMEOSTASIS EF...
- Abgebildete Person
- Seitenbereich
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086-093
- Schlagwort(e)
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photosynthesis, photosystem I, Synechocystis sp. PCC 6803, iron, hcf101
- Zusammenfsg.
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Iron is a key nutrient and component of several cofactors that are associated with the photosynthetic protein complexes in cyanobacteria, algae and higher plants. Previous studies uncovered many details about cellular factors involved in iron uptake, transport, storage, and cofactor biosynthesis in these organisms. To build upon current knowledge of iron metabolism in photosynthetic prokaryotes like Synechocystis sp. PCC 6803, we generated a deletion in the hcf101 ortholog from Arabidopsis thaliana. The Synechocystis mutant [delta]fheI (Fe homeostasis effector I) is significantly impaired in photosystem I activity, although transcripts of the reaction center proteins accumulate at wild type comparable levels. The [delta]fheI mutant grows slower than wild type in the absence of exogenous carbon sources. Iron starvation potentiates the growth related phenotype of [delta]fheI. Our results suggest that FheI from Synechocystis 6803 is critical under iron deficient conditions and involved in posttranscriptional processes of photosystem I biosynthesis.