Photosystem I Structural Fusion with IsiA Enhances Light-Harvesting Capabilities of Filamentous Cyanobacterium During Iron Deficiency
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ABSTRACT: Iron deficiency impairs energy capture and photosynthetic electron transport, leading to remodeling of photosynthetic complexes, mainly impacting photosystem I. In Anabaena sp. PCC 7120, this remodeling includes a change in the oligomeric state of PSI and the formation of a unique antenna system with covalently attached IsiA2-PSI complex, along with other IsiA homologs. This study describes the spectroscopic properties of three types of IsiA2-containing complexes and details their energy-transfer efficiency. Based on spectral data and Mass-Spec analysis of these complexes, a proposed model suggests that antenna modulation, influenced by the intracellular redox state, could regulate PSI activity during iron stress.
INSTRUMENT(S):
ORGANISM(S): Nostoc Sp. Pcc 7120 = Fachb-418
TISSUE(S): Whole Body
DISEASE(S): Disease Free
SUBMITTER:
Kuo-En Chen
LAB HEAD: Kuo-En Chen
PROVIDER: PXD072813 | Pride | 2026-08-03
REPOSITORIES: Pride
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