FBXO4

Substrate recognition component of a SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complex that mediates the ubiquitination and subsequent proteasomal degradation of target proteins (PubMed:10531035, PubMed:18598945, PubMed:20181953, PubMed:29142209). Promotes ubiquitination of CCND1 and its subsequent proteasomal degradation (PubMed:18598945). Recognizes TERF1 and promotes its ubiquitination together with UBE2D1 (PubMed:16275645, PubMed:20159592). Promotes ubiquitination of FXR1 following phosphorylation of FXR1 by GSK3B, leading to FXR1 degradation by the proteasome (PubMed:29142209).

Protein modification; protein ubiquitination.

Phosphorylation at Ser-12 varies during the cell cycle (By similarity). It is low in resting cells and high in the S phase and the G2/M phase of the cell cycle. Phosphorylation is decreased during late G1 phase (By similarity). Phosphorylation at Ser-12 promotes homodimerization and is necessary for optimal ubiquitin ligase activity towards CCND1 (PubMed:18598945).

• Cytoplasm

FBX4, FBXO4, F-box only protein 4

• entrezGene:26272
• omim:609090
• swissprot:Q9UKT5

Proteins

Immuno-oncology

44136Da