GA20OX1 (GA5, AtGA20ox1; At4g25420; UniProt Q39110) - curation notes

• Accession Q39110 = GAOX1_ARATH verified.
• Falcon deep research attempted and failed (exit code 1).

Function

• GA12 -> GA15 -> GA24 -> GA9 (RHEA:60772) PMID:7630935; GA53 -> GA44, GA19 -> GA20 PMID:7604047.
• ga5 nonsense allele PMID:7604047; ga5 has reduced C19-GAs PMID:2236013.
• Partially redundant with GA20ox2 for elongation growth, flowering, fertility PMID:18069939.

Regulation (non-core)

• GA feedback repression PMID:10330476
• Long-day/far-red induction [PMID:7604047; PMID:15923331].

Curation decisions

• short-day photoperiodism, flowering (IEP) -> KEEP_AS_NON_CORE. Evidence is transcript induction on SD->LD transfer, which does not place GA20ox1 in either SD or LD photoperiodic flowering; GA is classically required for Arabidopsis flowering under short days (ga1 fails to flower in SD; Wilson et al. 1992 Plant Physiol, not cached), consistent with the curator's SD term. GA20ox1/GA20ox2 redundantly promote flowering time PMID:18069939. The SD-only ga5-3 phenotype in PMID:15923331 is for EOD-FR petiole elongation, not flowering. (Earlier draft MODIFYed to long-day; reverted after PR review.)
• GA signaling TAS over-annotated; leaf development (overexpression) non-core.