共查询到20条相似文献,搜索用时 15 毫秒
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Villagra A Cruzat F Carvallo L Paredes R Olate J van Wijnen AJ Stein GS Lian JB Stein JL Imbalzano AN Montecino M 《The Journal of biological chemistry》2006,281(32):22695-22706
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Isolation of baculovirus-expressed human vitamin D receptor: DNA responsive element interactions and phosphorylation of the purified receptor 总被引:3,自引:0,他引:3
Jurutka PW MacDonald PN Nakajima S Hsieh JC Thompson PD Whitfield GK Galligan MA Haussler CA Haussler MR 《Journal of cellular biochemistry》2002,85(2):435-457
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Bone-specific transcription factor Runx2 interacts with the 1alpha,25-dihydroxyvitamin D3 receptor to up-regulate rat osteocalcin gene expression in osteoblastic cells 总被引:3,自引:0,他引:3
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Paredes R Arriagada G Cruzat F Villagra A Olate J Zaidi K van Wijnen A Lian JB Stein GS Stein JL Montecino M 《Molecular and cellular biology》2004,24(20):8847-8861
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Regulation of the bone-specific osteocalcin gene by p300 requires Runx2/Cbfa1 and the vitamin D3 receptor but not p300 intrinsic histone acetyltransferase activity
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Sierra J Villagra A Paredes R Cruzat F Gutierrez S Javed A Arriagada G Olate J Imschenetzky M Van Wijnen AJ Lian JB Stein GS Stein JL Montecino M 《Molecular and cellular biology》2003,23(9):3339-3351
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C Kimmel-Jehan H M Darwish S A Strugnell F Jehan B Wiefling H F DeLuca 《Journal of cellular biochemistry》1999,74(2):220-228
The ability of vitamin D receptor-retinoid X receptor (VDR-RXR) heterodimers to induce a DNA bend upon binding to various vitamin D response elements (VDRE) has been investigated by circular permutation and phasing analysis. Recombinant rat VDR expressed in the baculovirus system and purified recombinant human RXR beta have been used. The VDREs were from 1,25-dihydroxyvitamin D3 (1,25-[OH]2D3) enhanced genes (rat osteocalcin, rOC; mouse osteopontin, mOP, and rat 1,25-dihydroxyvitamin D3-24-hydroxylase, r24-OHase), and a 1,25-(OH)2D3 repressed gene (human parathyroid hormone, hPTH). As shown by circular permutation analysis, VDR-RXR induced a distortion in DNA fragments containing various VDREs. Calculated distortion angles were similar in magnitude (57 degrees, 56 degrees, 61 degrees, and 59 degrees, respectively for rOC, mOP, r24-Ohase, and hPTH). The distortions took place with or without a 1,25-(OH)2D3 ligand. The centers of the apparent bend were found in the vicinity of the midpoint of all VDREs, except for rOC VDRE which was found 4 bp upstream. Phasing analysis was performed with DNA fragments containing mOP VDRE and revealed that VDR-RXR heterodimers induced a directed bend of 26 degrees, not influenced by the presence of hormone. In this study we report that similar to other members of the steroid and thyroid nuclear receptor superfamily, VDR-RXR heterodimers induce DNA bending. 相似文献
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The vitamin D-responsive element in the human osteocalcin gene. Association with a nuclear proto-oncogene enhancer 总被引:12,自引:0,他引:12
K Ozono J Liao S A Kerner R A Scott J W Pike 《The Journal of biological chemistry》1990,265(35):21881-21888
A vitamin D-responsive element (VDRE) locus within the 5' region of the human osteocalcin gene promoter contains a steroid response-like half-site immediately proximal to a consensus site for the AP-1 nuclear oncogene family. In the studies described here, internal mutagenesis of the osteocalcin promoter coupled to functional assays reveal that the interaction of the vitamin D receptor is limited to the proximal region of the VDRE locus. Mutations within the distal AP-1 consensus site reduce the basal activity of the promoter but have little effect on vitamin D inducibility. The absolute level of promoter activity induced by hormone, however, is dramatically reduced in the absence of an intact AP-1 site suggesting a functional synergism between the receptor and AP-1-related proteins. In vitro receptor-DNA binding studies confirm the lack of requirement for the distal component in receptor binding. These results suggest that the osteocalcin VDRE is limited to 15 nucleotides closely juxtaposed to a distal functional AP-1 site. The close association of the two sites may lead to proto-oncogene and steroid receptor interactions that result in interesting functional consequences. 相似文献
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Retinoid X receptors stimulate and 9-cis retinoic acid inhibits 1,25-dihydroxyvitamin D3-activated expression of the rat osteocalcin gene. 总被引:8,自引:6,他引:2
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P N MacDonald D R Dowd S Nakajima M A Galligan M C Reeder C A Haussler K Ozato M R Haussler 《Molecular and cellular biology》1993,13(9):5907-5917