Aliases for FBXL2 Gene
External Ids for FBXL2 Gene
Previous GeneCards Identifiers for FBXL2 Gene
This gene encodes a member of the F-box protein family which is characterized 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 recognizable motifs. The protein encoded by this gene belongs to the Fbls class and, in addition to an F-box, contains 12 tandem leucine-rich repeats. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2010]
GeneCards Summary for FBXL2 Gene
FBXL2 (F-Box And Leucine-Rich Repeat Protein 2) is a Protein Coding gene. GO annotations related to this gene include ubiquitin-protein transferase activity and calmodulin binding. An important paralog of this gene is FBXL16.
UniProtKB/Swiss-Prot for FBXL2 Gene
Calcium-activated substrate recognition component of the SCF (SKP1-cullin-F-box protein) E3 ubiquitin-protein ligase complex, SCF(FBXL2), which mediates the ubiquitination and subsequent proteasomal degradation of target proteins. Unlike many F-box proteins, FBXL2 does not seem to target phosphodegron within its substrates but rather calmodulin-binding motifs and is thereby antagonized by calmodulin. This is the case for the cyclins CCND2 and CCND3 which polyubiquitination and subsequent degradation are inhibited by calmodulin. Through CCND2 and CCND3 degradation may induce cell-cycle arrest in G(0). SCF(FBXL2) may also mediate PIK3R2 ubiquitination and proteasomal degradation thereby regulating phosphatidylinositol 3-kinase signaling and indirectly autophagy (PubMed:22323446, PubMed:22020328, PubMed:23604317). PCYT1A monoubiquitination by SCF(FBXL2) and subsequent degradation may regulate synthesis of phosphatidylcholine, which is utilized for formation of membranes and of pulmonary surfactant (By similarity).