F-box domain superfamily; This short domain is commonly found at the N-terminus of various proteins, and typically co-occurs with one or more other conserved domains or motifs, such as leucine rich repeats, WD40 repeats, kelch, tub, spry, and others. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression. One of the best researched roles of F-box proteins is their participation in SCF (Skp1-Cul1-F-box protein), a multi-protein complex that functions as a ubiquitin E3 ligase, where the role of the F-box protein is to recruit target substrates. Gene families containing the F-box are found greatly expanded in narrow taxonomic lineages, such as flowering plants and nematodes. In this hierarchical classification, many of the subfamilies are named according to their domain architectures.

                         10        20        30
                 ....*....|....*....|....*....|....*.
gi 330443461 187 INDLPVEIIAKILSEFELGRDQKTLVRCLYVSKKFY 222
Cdd:cd22089    3 ISALPSEILLYILRWVVSDLDLRSLEQLSLVCRKFY 38

F-box domain found in F-box only protein 9 (FBXO9) and similar proteins; FBXO9, also called FBX9, cross-immune reaction antigen 1, renal carcinoma antigen NY-REN-57, or VCIA1, is the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complex which mediates the ubiquitination and subsequent proteasomal degradation of TTI1 and TELO2 in a CK2-dependent manner, thereby directly regulating mTOR signaling. FBXO9 acts as an E3 ubiquitin ligase that regulates the stability and activity of peroxisome proliferator-activated receptor gamma (PPARgamma) through ubiquitination. It is also required for adipocyte differentiation. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                         10        20        30
                 ....*....|....*....|....*....|....*.
gi 330443461 187 INDLPVEIIAKILSEFELGRDQKTLVRCLYVSKKFY 222
Cdd:cd22089    3 ISALPSEILLYILRWVVSDLDLRSLEQLSLVCRKFY 38

F-box domain found in F-box only protein 9 (FBXO9) and similar proteins; FBXO9, also called FBX9, cross-immune reaction antigen 1, renal carcinoma antigen NY-REN-57, or VCIA1, is the substrate-recognition component of an SCF (SKP1-CUL1-F-box protein) E3 ubiquitin-protein ligase complex which mediates the ubiquitination and subsequent proteasomal degradation of TTI1 and TELO2 in a CK2-dependent manner, thereby directly regulating mTOR signaling. FBXO9 acts as an E3 ubiquitin ligase that regulates the stability and activity of peroxisome proliferator-activated receptor gamma (PPARgamma) through ubiquitination. It is also required for adipocyte differentiation. The F-box domain has a role in mediating protein-protein interactions in a variety of contexts, such as polyubiquitination, transcription elongation, centromere binding and translational repression.

                         10        20        30
                 ....*....|....*....|....*....|....*.
gi 330443461 187 INDLPVEIIAKILSEFELGRDQKTLVRCLYVSKKFY 222
Cdd:cd22089    3 ISALPSEILLYILRWVVSDLDLRSLEQLSLVCRKFY 38