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    Genomics. 2000 Jul 1;67(1):40-7.

    cDNA cloning and expression analysis of new members of the mammalian F-box protein family.

    Ilyin GP, Rialland M, Pigeon C, Guguen-Guillouzo C.

    INSERM U522, Hôpital Pontchaillou, Rennes, France. Guennadi.Iline@rennes.inserm.fr

    F-box proteins are critical components of the SCF ubiquitin-protein ligase complex and are involved in substrate recognition and recruitment for ubiquitination and consequent degradation by the proteasome. We have isolated cDNAs encoding a further 10 mammalian F-box proteins. Five of them (FBL3 to FBL7) share structural similarities with Skp2 and contain C-terminal leucine-rich repeats. The other 5 proteins have different putative protein-protein interaction motifs. Specifically, FBS and FBWD4 proteins contain Sec7 and WD40-repeat domains, respectively. The C-terminal region of FBA shares similarity with bacterial protein ApaG while FBG2 shows homology with the F-box protein NFB42. The marked differences in F-box gene expression in human tissues suggest their distinct role in ubiquitin-dependent protein degradation.

    PMID: 10945468 [PubMed - indexed for MEDLINE]

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