Author

D. Niedzwiedzki

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Sep 2026

Inefficient Carotenoid-Mediated Quenching of Chlorophyll a Triplet: A Hypothetical Cause for the Evolution of Cys-Mediated Quenching in IsiA.

Iron-stress-induced protein A (IsiA) is a chlorophyll (Chl) a-containing protein in cyanobacteria. Under low-iron growth, it is the most abundant intracellular Chl a-binding protein. IsiA and the CP43 protein are suggested to have coevolved from a common ancestral protein, sharing similar spectroscopic properties. When...

D. Niedzwiedzki, S. Biswas, H. Pakrasi · Journal of Physical Chemistr... · 0 citations

Open access Sep 2026

Photosystem I structural fusion with IsiA enhances light-harvesting capabilities of filamentous cyanobacterium during iron deficiency

Analysis of energetic properties of gel-embedded supercomplexes demonstrated that excitation energy transfer in the IsiA-PsaL complex is highly efficient, suggesting enhanced efficiency may be a key factor underlying the downsizing of the IsiA-PSI assembly, which could compensate for the smaller size of the complex.

S. Biswas, D. Niedzwiedzki, Kuo-En Chen et al. · Cell Reports Physical Scienc... · 0 citations

Open access Aug 2026

Antenna photosystem I remodeling in the iron stress–induced complex from Anabaena sp. PCC 7120

The structure and oligomeric states of the photosystem I–iron stress–induced protein A (PSI-IsiA) supercomplex from several species have been investigated using cryo–electron microscopy (cryo-EM) and atomic force microscopy. The cryo-EM structure of the PSI-IsiA complex from cyanobacterium Anabaena sp. PCC 7120 (7120)...

Ranel Maqdisi, D. Niedzwiedzki, Christopher A. Gorski et al. · Science Advances · 0 citations