NCBI Accession #
NP_192207.1
NCBI GenBank Nucleotide #
NM_116532.3
NCBI Official Full Name
endoplasmic reticulum auxin binding protein 1
NCBI Official Symbol
ABP1
NCBI Official Synonym Symbols
ABP; AT-ERABP1; endoplasmic reticulum auxin binding protein 1; T4I9.14; T4I9_14
NCBI Protein Information
endoplasmic reticulum auxin binding protein 1
NCBI Summary
Auxin binding protein involved in cell elongation and cell division. ABP1 is ubiquitinated in vitro and in planta by AtRma2.
UniProt Synonym Gene Names
ABP1
UniProt Protein Name
Auxin-binding protein 1
UniProt Primary Accession #
P33487
UniProt Secondary Accession #
Q8LBB3
UniProt Related Accession #
P33487
UniProt Comments
Auxin receptor that controls cell elongation and cell division (PubMed:9804548, PubMed:11297513). Involved in embryonic morphogenesis (PubMed:11297513). Acts on the cell cycle, endocycle, cell plate formation, and cell expansion and contributes to the control of auxin-related gene expression (PubMed:18952781). Controls root meristem size and mediates auxin responsiveness (PubMed:19777056). Involved in activation of ROP GTPases in response to auxin and regulation of clathrin-mediated endocytosis in roots (PubMed:20887895, PubMed:22683261). Acts as a positive factor in clathrin recruitment to the plasma membrane, thereby promoting endocytosis (PubMed:20887896, PubMed:25922490). Upon auxin binding, restricts the internalization of PIN proteins by inhibiting clathrin-mediated endocytosis (PubMed:20887896, PubMed:25922490). Involved in the regulation of polar auxin transport (PubMed:21223392). Behaves as a negative regulator of the SCF(TIR1/AFB) signaling pathway, protecting AUX/IAA repressors from degradation (PubMed:24051655). Regulates the expression of cell wall remodeling genes via an SCF(TIR1/AFB)-dependent pathway (PubMed:24424095). Involved in the modulation of hemicellulose xyloglucan structure (PubMed:24424095). Required for rapid auxin-mediated re-orientation of microtubules to regulate cell elongation in roots and dark-grown hypocotyls as well as asymmetric growth during gravitropic responses (PubMed:25409144). Involved in the shade avoidance response (PubMed:24052532). Forms with TMK1 a cell surface auxin perception complex that activates ROP signaling pathways (PubMed:24578577). ABP1 sensing of auxin is important for the ABP1-TMK1 complex formation (PubMed:24578577). Interacts functionally with phytochrome to regulate growth (PubMed:25392478).