Research Project
Grant-in-Aid for Scientific Research (B)
The structure of chromatin, which influences numerous DNA-associated phenomena, such as transcription, replication, recombination and repair, is controlled by a complex combination of histone modifications, ATP-dependent chromatin-remodeling enzymes, and nucleosome-assembly factors. The amino-terminal (N-terminal) tails of histones can be modified by acetylation, phosphorylation, methylation, ubiquitination and ADP-ribosylation. We report here that transcription factor Jun dimerization protein 2 (JDP2) binds directly to histones and inhibits the p300-mediated acetylation both of core histones in vitro and of reconstituted nucleosomes that contain JDP2-recognition sequences. The 35 amino-terminal residues of JDP2 are required for histone-binding activity. The region encompassing both the histone-binding domain and the DNA-binding region is essential for the inhibition of histone acetylation by histone acetyltransferases (HAT). Moreover, assays of nucleosome assembly in vitro demonstrate … More that JDP2 also has histone-chaperone activity. Mutation of the region responsible for HAT-inhibition within JDP2 eliminates the repression of transcription from the c-jun promoter by JDP2, as well as the JDP2-mediated inhibition of RA-induced differentiation of F9 cells. Moreover, in an examination of Jdp2 "knock-out" (KO) mice, we observed elevated numbers of white adipocytes and the significant accumulation of lipid in the adipose tissue in sections of scapulae. In addition, mouse embryo fibroblasts (MEFs) from Jdp2 KO mice were more susceptible to adipocyte differentiation in response to hormonal induction and members of the C/EBP gene family were expressed at higher levels than was the case for MEFs from wild-type mice. Furthermore, JDP2 inhibited both the acetylation of histone H3 in the promoter of the gene for C/EBPδ and transcription from this promoter. Our data indicate that JDP2 plays a key role as a repressor of adipocyte differentiation by regulating the expression of the gene for C/EBPδ via inhibition of histone acetylation. Less
All 2007 2006 2005 Other
All Journal Article (52 results)
Clinical Cancer Research. (印刷中)
Methods in Molecular Biology (印刷中)
Cell Death and Differentiaton (印刷中)
Clinical Cancer Research (In press)
Methods in Molecular Biology (In press)
Cell Death and Differentiation (In press)
J. Biol. Chem. 281
Pages: 35633-35648
Pages: 39081-39087
Nature Structural & Molecular Biology 13
Pages: 331-338
Biochem. J. 393
Pages: 779-788
Nature Struc. Mo.1.Biol. 13
J.Biol.Chem. 281
Nature Struc.Mol.Biol. (印刷中)
Biochem.J. 393
Current Topics in Genetics 1
Pages: 1-17
Methods in Molecular Biology 329
Pages: 57-79
Cancer Research 65
Pages: 546-552
Science 307
Pages: 1722-1722
Biochem. Biophys. Res. Commu. 331
Pages: 1053-1060
J. Gene Med. 7
Pages: 1148-1157
J. Cell Science 118
Pages: 5005-5022
J. Surgical Res. 128
Pages: 126-131
Biochem. Biophys. Res. Commu. 337
Pages: 806-814
Current Genomics 6
Pages: 351-364
Human Cell 18
Pages: 135-141
Pages: 59-79
J.Cell Science 118
J.Gene Med. 7
J.Surgical Res. 128
Biochem.Biophys.Res.Commu. 337
Biochem.Biophys.Res.Commu. 331
Clin.Cancer.Res. (in press)
Methods in Mo1.Biol. (in press)
current Topics in Biology Research (in press)