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Updated: Aug 30, 2026

Isolation and Characterization of Intact Phycobilisome in Cyanobacteria
Published on: November 10, 2021
Light-induced dephosphorylation of a 65-kDa protein in the cyanobacterium Synechocystis sp. PCC6803
Jong-Soon Choi1, Mi-Chung Ahn, Young-Ho Chung
1Proteome Analysis Team, Korea Basic Science Institute, Daejeon 305-333, Korea.
Abstract:
We found that a 65-kDa protein (p65) of Synechocystis sp. PCC 6803 is dephosphorylated in a light-dependent manner. In darkness, p65 was specifically phosphorylated and then completely dephosphorylated within 2 min upon exposure to high-intensity light. The phosphorylation of p65 recurred after 8 hours incubated in the dark following light exposure. Green (540-560 nm) and red (660 nm) light dephosphorylated p65 efficiently, with the efficiency being greater with green light. These results suggest that p65 is a novel substrate involved in the quantity and quality of light-dependent dephosphorylation in cyanobacteria.
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