PRR7 (APRR7, At5g02810; UniProt Q93WK5) curation notes

2026-10-06: initial review (module plant_circadian_clock_oscillator)

• Fetched with just fetch-gene ARATH Q93WK5 --alias PRR7. Falcon deep research failed; review based on cached publications.

Key findings

• Repressor of CCA1/LHY with PRR9/PRR5 PMID:20233950; acts with TPL/TPR PMID:23267111.
• Directly represses morning-expressed growth, light and stress regulators PMID:23808423.
• Nuclear PRR7-GUS; prr7 de-etiolation defect and phase advance PMID:14563930.
• prr5 prr7 double mutant nearly arrhythmic PMID:15695441.
• Sugar entrainment: bZIP63 regulates PRR7 transcription PMID:30078562. The TAIR protein-binding row citing this paper has bZIP63 in WITH, but the paper's central result concerns PRR7 promoter regulation.

Decisions

• Mitochondrion HDA (PMID:14671022, proteome of 416 proteins, about half predicted mitochondrial): MARK_AS_OVER_ANNOTATED, likely co-purification.
• Phosphorelay and cytokinin IEA: REMOVE. DNA-binding TF activity IBA: MODIFY to GO:0001227.
• Protein binding: REMOVE.