Component of SCF(ASK-cullin-F-box) E3 ubiquitin ligase complexes, which may mediate the ubiquitination and subsequent proteasomal degradation of target proteins. Confers sensitivity to the virulent bacterial pathogen P.syringae (By similarity). Auxin receptor that mediates Aux/IAA proteins proteasomal degradation and auxin-regulated transcription. Involved in embryogenesis regulation by auxin. Protein modification; protein ubiquitination. Part of a SCF (SKP1-cullin-F-box) protein ligase complex (By similarity). Interacts with Aux/IAA proteins (IAA7) in an auxin-dependent manner. Ubiquitous, with higher levels in seedlings. Repressed by miR393a (microRNA) in response to flg-22 (flagellin-derived peptide 22). The F-box is necessary for the interaction with SKP1.