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BRI1 Leucine-rich receptor-like protein kinase family protein [ Arabidopsis thaliana (thale cress) ]

Gene ID: 830095, updated on 6-Jul-2026
Official Symbol
BRI1
Official Full Name
Leucine-rich receptor-like protein kinase family protein
Primary source
TAIR:AT4G39400
Locus tag
AT4G39400
See related
Araport:AT4G39400
Gene type
protein coding
RefSeq status
REVIEWED
Organism
Arabidopsis thaliana (ecotype: Columbia)
Lineage
Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta; Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae; rosids; malvids; Brassicales; Brassicaceae; Camelineae; Arabidopsis
Also known as
ATBRI1; BIN1; BR INSENSITIVE 1; BRASSINOSTEROID INSENSITIVE 1; CABBAGE 2; CBB2; DWARF 2; DWF2; F23K16.30; F23K16_30
Summary
Encodes a plasma membrane localized leucine-rich repeat receptor kinase involved in brassinosteroid signal transduction. BRI1 ligand is brassinolide which binds at the extracellular domain. Binding results in phosphorylation of the kinase domain which activates the BRI1 protein leading to BR responses. Residue T-1049 and either S-1044 or T-1045 were essential for kinase function in vitro and normal BRI1 signaling in planta. The structure of BRI1 ligand-binding domain has been determined at 2.5A resolution. Although BAK1 and BRI1 alone localize in the plasma membrane, when BAK1 and BRI1 are coexpressed, the heterodimer BAK1/BRI1 they form is localized in the endosome. BRI1 appears to be involved in the autonomous pathway that regulates the transition to flowering, primarily through its effects on FLC expression levels, as uncovered by double mutant analyses. This most likely occurs as a result of BRI1-dependent effects on histone acetylation, but not histone triMeH3K4 methylation, at the FLC locus.
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See BRI1 in Genome Data Viewer
Location:
chromosome: 4
Exon count:
1
Sequence:
Chromosome: 4; NC_003075.7 (18324457..18328831)

Chromosome 4 - NC_003075.7Genomic Context describing neighboring genes Neighboring gene nucleotide sugar transporter-KT 1 Neighboring gene ncRNA Neighboring gene ncRNA Neighboring gene polari

Genomic Sequence:
NC_003075.7

GeneRIFs: Gene References Into Functions

What's a GeneRIF?
Products Interactant Other Gene Complex Source Pubs Description
NM_120100.3

Gene Ontology Provided by TAIR

Function Evidence Code Pubs
enables ATP binding IEA
Inferred from Electronic Annotation
more info
 
enables SNARE binding IPI
Inferred from Physical Interaction
more info
PubMed 
enables identical protein binding IPI
Inferred from Physical Interaction
more info
PubMed 
enables protein binding IPI
Inferred from Physical Interaction
more info
PubMed 
enables protein heterodimerization activity IPI
Inferred from Physical Interaction
more info
PubMed 
enables protein homodimerization activity IPI
Inferred from Physical Interaction
more info
PubMed 
enables protein kinase activity IDA
Inferred from Direct Assay
more info
PubMed 
enables protein kinase activity IEA
Inferred from Electronic Annotation
more info
 
enables protein serine kinase activity IEA
Inferred from Electronic Annotation
more info
 
enables protein serine/threonine kinase activity IBA
Inferred from Biological aspect of Ancestor
more info
 
enables protein serine/threonine kinase activity IDA
Inferred from Direct Assay
more info
PubMed 
enables protein serine/threonine kinase activity IEA
Inferred from Electronic Annotation
more info
 
enables protein tyrosine kinase activity IEA
Inferred from Electronic Annotation
more info
 
enables signaling receptor activity IBA
Inferred from Biological aspect of Ancestor
more info
 
enables steroid binding IDA
Inferred from Direct Assay
more info
PubMed 
enables transmembrane receptor protein tyrosine kinase activity IEA
Inferred from Electronic Annotation
more info
 
Process Evidence Code Pubs
acts_upstream_of_or_within anther wall tapetum cell differentiation IMP
Inferred from Mutant Phenotype
more info
PubMed 
acts_upstream_of_or_within brassinosteroid homeostasis IEP
Inferred from Expression Pattern
more info
PubMed 
involved_in brassinosteroid mediated signaling pathway IEA
Inferred from Electronic Annotation
more info
 
acts_upstream_of_or_within brassinosteroid mediated signaling pathway IEP
Inferred from Expression Pattern
more info
PubMed 
acts_upstream_of_or_within brassinosteroid mediated signaling pathway IMP
Inferred from Mutant Phenotype
more info
PubMed 
involved_in detection of brassinosteroid stimulus IEA
Inferred from Electronic Annotation
more info
 
acts_upstream_of_or_within detection of brassinosteroid stimulus IMP
Inferred from Mutant Phenotype
more info
PubMed 
involved_in hormone-mediated signaling pathway IBA
Inferred from Biological aspect of Ancestor
more info
 
acts_upstream_of_or_within leaf development IMP
Inferred from Mutant Phenotype
more info
PubMed 
involved_in microtubule bundle formation IEA
Inferred from Electronic Annotation
more info
 
acts_upstream_of_or_within pollen exine formation IMP
Inferred from Mutant Phenotype
more info
PubMed 
acts_upstream_of_or_within positive regulation of flower development IGI
Inferred from Genetic Interaction
more info
PubMed 
involved_in response to light stimulus IEA
Inferred from Electronic Annotation
more info
 
acts_upstream_of_or_within response to light stimulus IMP
Inferred from Mutant Phenotype
more info
PubMed 
involved_in response to water deprivation IEA
Inferred from Electronic Annotation
more info
 
acts_upstream_of_or_within response to water deprivation IMP
Inferred from Mutant Phenotype
more info
PubMed 
involved_in seedling development IMP
Inferred from Mutant Phenotype
more info
PubMed 
involved_in skotomorphogenesis IEA
Inferred from Electronic Annotation
more info
 
Component Evidence Code Pubs
located_in endosome IDA
Inferred from Direct Assay
more info
PubMed 
located_in endosome membrane IEA
Inferred from Electronic Annotation
more info
 
located_in plasma membrane EXP
Inferred from Experiment
more info
PubMed 
located_in plasma membrane HDA PubMed 
is_active_in plasma membrane IBA
Inferred from Biological aspect of Ancestor
more info
 
located_in plasma membrane IDA
Inferred from Direct Assay
more info
PubMed 
located_in plasma membrane IEA
Inferred from Electronic Annotation
more info
 
located_in plasma membrane ISM
Inferred from Sequence Model
more info
 
part_of protein-containing complex IPI
Inferred from Physical Interaction
more info
PubMed 
Preferred Names
Leucine-rich receptor-like protein kinase family protein
NP_195650.1
  • BRASSINOSTEROID INSENSITIVE 1 (BRI1); FUNCTIONS IN: in 6 functions; INVOLVED IN: in 9 processes; LOCATED IN: endosome, plasma membrane, protein complex; EXPRESSED IN: 24 plant structures; EXPRESSED DURING: 13 growth stages; CONTAINS InterPro DOMAIN/s: Protein kinase, ATP binding site (InterPro:IPR017441), Protein kinase, catalytic domain (InterPro:IPR000719), Leucine-rich repeat-containing N-terminal domain, type 2 (InterPro:IPR013210), Leucine-rich repeat (InterPro:IPR001611), Serine/threonine-protein kinase-like domain (InterPro:IPR017442), Protein kinase-like domain (InterPro:IPR011009), Serine/threonine-protein kinase, active site (InterPro:IPR008271); BEST Arabidopsis thaliana protein match is: BRI1 like (TAIR:AT1G55610.2); Has 214988 Blast hits to 139206 proteins in 4645 species: Archae - 193; Bacteria - 21464; Metazoa - 65624; Fungi - 10774; Plants - 90532; Viruses - 410; Other Eukaryotes - 25991 (source: NCBI BLink).

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Genome Annotation

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference assembly

Genomic

  1. NC_003075.7 Reference assembly

    Range
    18324457..18328831
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. NM_120100.3NP_195650.1  Leucine-rich receptor-like protein kinase family protein [Arabidopsis thaliana]

    See identical proteins and their annotated locations for NP_195650.1

    Status: REVIEWED

    UniProtKB/Swiss-Prot
    C0LGS4, O22476
    Conserved Domains (2) summary
    PLN00113
    Location:351146
    PLN00113; leucine-rich repeat receptor-like protein kinase; Provisional
    sd00033
    Location:367391
    LRR_RI; leucine-rich repeat [structural motif]