A new subfamily of structurally related human F-box proteins

被引：34

作者：

Ilyin, GP ^{[1
]}

Sérandour, AL ^{[1
]}

Pigeon, C ^{[1
]}

Rialland, M ^{[1
]}

Glaise, D ^{[1
]}

Guguen-Guillouzo, C ^{[1
]}

机构：

[1] Hop Pontchaillou, INSERM U522, F-35033 Rennes, France

来源：

GENE | 2002年 / 296卷 / 1-2期

关键词：

SCF complex; genomic organization; tissue expression;

D O I：

10.1016/S0378-1119(02)00867-3

中图分类号：

Q3 [遗传学];

学科分类号：

071007 ; 090102 ;

摘要：

F-box proteins, a critical component of the evolutionary conserved ubiquitin-protein ligase complex SCF (Skp1/Cdc53-Cullin1/F-box), recruit substrates for ubiquitination and consequent degradation through their specific protein-protein interaction domains. Here, we report the identification of full-length cDNAs encoding three novel human F-box proteins named FBG3, FBG4 and FBG5 which display similarity with previously identified NFB42 (FBX2) and FBG2 (FBX6) proteins. All five proteins are characterized by an approximately 180-amino-acid (aa) conserved C-terminal domain and thus constitute a third subfamily of mammalian F-box proteins. Analysis of genomic organization of the five FBG genes revealed that all of them consist of six exons and five introns. FBG1, FBG2 and FBG3 genes are located in tandem on chromosome 1p36, and FBG4 and FBG5 are mapped to chromosome 19q13. FBG genes are expressed in a limited number of human tissues including kidney, liver, brain and muscle tissues. Expression of rat FBG2 gene was found related to differentiation/proliferation status of hepatocytes. Specifically, FBG2 mRNA was expressed in foetal liver, decreased after birth and re-accumulated in adult liver. Expression of FBG2 was strongly inhibited in hepatoma cells by okadaic acid. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：11 / 20

页数：10

共 30 条

[1] SKP1 connects cell cycle regulators to the ubiquitin proteolysis machinery through a novel motif, the F-box [J].