Prospero-related homeobox (Prox1) is a corepressor of human liver receptor homolog-1 and suppresses the transcription of the cholesterol 7-alpha-hydroxylase gene
文献类型：期刊论文
| 作者 | Qin, J; Gao, DM; Jiang, QF; Zhou, Q; Kong, YY; Wang, Y; Xie, YH |
| 刊名 | MOLECULAR ENDOCRINOLOGY
 |
| 出版日期 | 2004 |
| 卷号 | 18期号:10页码:2424-2439 |
| 通讯作者 | Xie, YH (reprint author), Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Biochem & Cell Biol, State Key Lab Mol Biol, Yueyang Rd 320, Shanghai 200031, Peoples R China.,wangy@sibs.ac.cn ; yhxie@sibs.ac.cn |
| 英文摘要 | Cholesterol 7-alpha-hydroxylase (CYP7A1) catalyzes a rate-limiting step in bile acid synthesis in liver, and its gene transcription is under complex regulation by multiple nuclear receptors in response to bile acids, cholesterol derivatives, and hormones. The liver receptor homolog-1 (LRH-1), a member of the fushi tarazu factor 1 subfamily of nuclear receptors, has emerged as an essential regulator for the expression of cyp7a1. In this report, we demonstrate Prox1, a prospero-related homeobox transcription factor, identified through a yeast two-hybrid screening, can directly interact with human LRH-1 (hLRH-1) and suppresses hLRH-1-mediated transcriptional activation of human cyp7a1 gene. Biochemical analysis demonstrates that Prox1 interacts with both the ligand binding domain (LBD) and the DNA binding domain (DBD) of hLRH-1. An LRKLL motif in Prox1 is important for the interaction with the LBD but not the DBD of hLRH-1. In hLRH-1 LBD, helices 2 and 10 are essential for Prox1 recruitment. The suppression by Prox1 on the transcriptional activity of hLRH-1 can be mediated through its interaction with the LBD or the DBD of hLRH-1. Gel shift assays reveal that Prox1 impairs the binding of hLRH-1 to the promoter of human cyp7a1 gene. |
| 学科主题 | Endocrinology & Metabolism |
| 类目[WOS] | Endocrinology & Metabolism |
| 关键词[WOS] | STEROIDOGENIC FACTOR-I ; ORPHAN NUCLEAR RECEPTOR ; NEGATIVE FEEDBACK-REGULATION ; BILE-ACID SYNTHESIS ; WILMS-TUMOR 1 ; STEROL 12-ALPHA-HYDROXYLASE ; REGULATES EXPRESSION ; P450SCC GENE ; ACTIVATION ; PROMOTER |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000224025200006 |
| 版本 | 出版稿 |
| 源URL | [http://202.127.25.143/handle/331003/2150]  |
| 专题 | 上海生化细胞研究所_上海生科院生化细胞研究所 |
| 推荐引用方式 GB/T 7714 | Qin, J,Gao, DM,Jiang, QF,et al. Prospero-related homeobox (Prox1) is a corepressor of human liver receptor homolog-1 and suppresses the transcription of the cholesterol 7-alpha-hydroxylase gene[J]. MOLECULAR ENDOCRINOLOGY,2004,18(10):2424-2439. |
| APA | Qin, J.,Gao, DM.,Jiang, QF.,Zhou, Q.,Kong, YY.,...&Xie, YH.(2004).Prospero-related homeobox (Prox1) is a corepressor of human liver receptor homolog-1 and suppresses the transcription of the cholesterol 7-alpha-hydroxylase gene.MOLECULAR ENDOCRINOLOGY,18(10),2424-2439. |
| MLA | Qin, J,et al."Prospero-related homeobox (Prox1) is a corepressor of human liver receptor homolog-1 and suppresses the transcription of the cholesterol 7-alpha-hydroxylase gene".MOLECULAR ENDOCRINOLOGY 18.10(2004):2424-2439. |
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