Full Name: F-Box And Leucine Rich Repeat Protein 3

Genomic Location: Chromosome 13:76,992,598-77,027,196

Protein Size: 428 amino acids


Substrate-recognition component of the SCF(FBXL3) E3 ubiquitin ligase complex involved in circadian rhythm function. Plays a key role in the maintenance of both the speed and the robustness of the circadian clock oscillation.

This gene encodes a member of the F-box protein family which is characterised by an approximately 40 amino acid motif, the F-box. The F-box proteins constitute one of the four subunits of ubiquitin protein ligase complex called SCFs (SKP1-cullin-F-box), which function in phosphorylation-dependent ubiquitination. The F-box proteins are divided into 3 classes: Fbws containing WD-40 domains, Fbls containing leucine-rich repeats, and Fbxs containing either different protein-protein interaction modules or no recognisable motifs. The protein encoded by this gene belongs to the Fbls class and, in addition to an F-box, contains several tandem leucine-rich repeats and is localised in the nucleus.

Linked SNP(s):

  • rs9565309 ┬áis linked to FBXL3, it is located approximately 2000 bases downstream.
  • Population frequencies are approximately 97% for the reference allele (T) and 3% for the alternate allele (C).
  • Studies suggest the G allele is associated with a sensitivity to bad fats.
Did this answer your question?