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Article

Opposing action of photosystem II assembly factors RBD1 and HCF136 underlies light-regulated psbA translation in plant chloroplasts.

Proceedings of the National Academy of Sciences of the United States of America - 26 Aug 2025

Rojas Margarita, Williams-Carrier Rosalind, Chotewutmontri Prakitchai, Belcher Susan, Boyce Emily, Barkan Alice

Abstract excerpt

The D1 subunit of photosystem II (PSII) is subject to light-induced damage. In plants, D1 photodamage activates translation of chloroplast psbA mRNA encoding D1, providing D1 for PSII repair. Three D1 assembly factors have been implicated in the regulatory mechanism: HCF244 and RBD1 activate psbA translation, whereas HCF136 represses psbA translation in the dark. To clarify the regulatory circuit, we analyzed...

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Methodology Data sources Editorial policy Privacy About Contact Helena Bioinformatics

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Identifiers

PMID: 40828009
DOI: 10.1073/pnas.2423694122
PMCID: PMC12403006

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Opposing action of photosystem II assembly factors RBD1 and HCF136 underlies light-regulated psbA translation in plant chloroplasts.PMID 40828009Read ↗

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