BRC1 (TCP18, At3g18550, UniProt A1YKT1) curation notes

Folder uses the standard TAIR/Arabidopsis name BRC1; the review's gene_symbol follows the UniProt
primary gene name TCP18 (BRC1 is a UniProt synonym); fetched by accession
(just fetch-gene ARATH A1YKT1 --alias BRC1). Context: strigolactone_signaling_shoot_branching
module. Falcon deep research failed; notes from cached publications.

Function

• Bud-expressed TCP factor that arrests bud development, downstream of MAX pathway PMID:17307924.
• Nuclear GFP:BRC1 PMID:17307924.
• Required for shade-induced bud suppression PMID:23524661.
• Binds GGgcCCmc motif, directly activates HB21/HB40/HB53 -> NCED3/ABA in buds PMID:28028241.
• SL induces BRC1 via SMXL6/7/8 degradation PMID:26546446; PMID:32528176.
• BRC1 not strictly necessary/sufficient; sets bud activation potential PMID:28289131.
• brc1brc2 reduced but significant SL response PMID:30865619.

Curation decisions

• secondary shoot formation (IMP, shade) -> MODIFY to GO:0097207 bud dormancy process.
• HT Y2H protein binding -> REMOVE; Y1H cis-regulatory binding (PMID:25533953) -> non-core.
• Core: DNA-binding transcription factor activity in nucleus; regulation of secondary shoot
  formation; bud dormancy process; response to strigolactone.