NCBI Accession #
NP_567135.1
NCBI GenBank Nucleotide #
NM_116163.4
NCBI Official Full Name
F-box/RNI-like superfamily protein
NCBI Official Symbol
TIR1
NCBI Official Synonym Symbols
AtTIR1; TRANSPORT INHIBITOR RESPONSE 1
NCBI Protein Information
F-box/RNI-like superfamily protein
NCBI Summary
Encodes an auxin receptor that mediates auxin-regulated transcription. It contains leucine-rich repeats and an F-box and interacts with ASK1, ASK2 and AtCUL1 to form SCF-TIR1, an SCF ubiquitin ligase complex. Related to yeast Grr1p and human SKP2 proteins, involved in ubiquitin-mediated processes. Required for normal response to auxin and repressed in response to flagellin. As part of the SCF complex and in the presence of auxin, TIR1 interacts with Aux/IAA transcriptional repressor proteins and mediates their degradation. Mutations in TIR1 block auxin stimulation of flavonoid synthesis.
UniProt Synonym Gene Names
FBL1; WEI1
UniProt Protein Name
Protein TRANSPORT INHIBITOR RESPONSE 1
UniProt Synonym Protein Names
Weak ethylene-insensitive protein 1
UniProt Primary Accession #
Q570C0
UniProt Secondary Accession #
O24660; A5YZP2; B2CVU0
UniProt Related Accession #
Q570C0
UniProt Comments
Auxin receptor that mediates Aux/IAA proteins proteasomal degradation and auxin-regulated transcription. The SCF(TIR1) E3 ubiquitin ligase complex is involved in auxin-mediated signaling pathway that regulate root and hypocotyl growth, lateral root formation, cell elongation, and gravitropism. Appears to allow pericycle cells to overcome G2 arrest prior to lateral root development. Plays a role in ethylene signaling in roots. Confers sensitivity to the virulent bacterial pathogen P.syringae.