Disease relevance of psbU

• Analysis of the psbU gene encoding the 12-kDa extrinsic protein of photosystem II and studies on its role by deletion mutagenesis in Synechocystis sp. PCC 6803 [1].

High impact information on psbU

• This gene, named psbU, encodes a polypeptide of 131 residues, the first 36 residues of which were absent in the mature protein and thus served as a transit peptide required for its transport into the thylakoid lumen [1].
• A psbU gene deletion mutant grew photoautotrophically in normal BG11 medium at almost the same rate as that of the wild type strain [1].
• (3) The delta psbV and delta psbU mutants exhibited elevated peak temperature for the thermoluminescence B- and Q-bands indicative of more stable S2 states [2].
• (6) Photoactivation of the oxygen-evolving complex after removal of the manganese cluster by hydroxylamine showed a higher quantum yield in the delta psbV mutant than in the delta psbU mutant or wild type [2].
• (4) The rise time of the O2 signal during the S3-[S4]-S0 transition was increased slightly in the delta psbV mutant but not in the delta psbU mutant [2].

References