Substrate recognition component of a SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complex which mediates the ubiquitination and subsequent proteasomal degradation of target proteins. Recognizes BIRC2 and DLGAP5. Plays a role downstream of PINK1 in the clearance of damaged mitochondria via selective autophagy (mitophagy) by targeting PRKN to dysfunctional depolarized mitochondria. Promotes MFN1 ubiquitination (By similarity). Protein modification; protein ubiquitination. Part of the SCF (SKP1-CUL1-F-box) E3 ubiquitin-protein ligase complex SCF(FBXO7) formed of CUL1, SKP1, RBX1 and FBXO7. Interacts via its C-terminal proline-rich region with DLGAP5. Interacts with BIRC2. Interacts with CDK6 and promotes its interaction with D-type cyclin. Interacts (via the N-terminal Ubl domain) with PRKN. Interacts (via N-terminal region) with PINK1. Interacts with PSMF1 (By similarity). Predominantly cytoplasmic. A minor proportion is detected in the nucleus. Relocates from the cytosol to depolarized mitochondria (By similarity). The ubiquitin-like region mediates interaction with PRKN. The proline-rich region is important for protein-protein interactions.