A novel G-quadruplex motif in the Human MET promoter region

A novel G-quadruplex motif in the Human MET promoter region
复制标题

人类 MET 启动子区域中的新型 G-四链体基序

DOI:
10.1042/bsr20171128
复制
发表时间:
2017-10
期刊:
影响因子:
4
通讯作者:
Guan Yifu
Guan Yifu
中科院分区:
生物学3区
文献类型:
--
作者:
Yan Jing;Zhao Deming;Dong Liping;Pan Shuang;Hao Fengjin;Guan Yifu

文献摘要

参考文献

相似文献

已知原癌基因启动子中富含鸟嘌呤的链可折叠成G -四链体结构以调控基因表达。在MET启动子中已鉴定出一种分子内平行G -四链体,它在调控MET表达中起抑制作用。然而,MET启动子中完整的富含鸟嘌呤区域在生理条件下形成一种混合平行/反平行G -四链体结构,这意味着该区域存在一些反平行以及混合平行/反平行G -四链体结构。在本研究中,我们的数据表明,g3 - 5截短体在体外生理条件下采用一种分子内混合平行/反平行G -四链体结构。g3 - 5 G -四链体结构在K⁺缓冲液中显著阻止Klenow片段的聚合。此外,圆二色性(CD)光谱和聚合酶终止试验的结果直接表明,g3 - 5片段中的G -四链体结构可被G -四链体配体TMPyP4(5,10,15,20 - 四-(N - 甲基- 4 - 吡啶基)卟啉)稳定。但是双荧光素酶试验表明TMPyP4对HepG2细胞中g3 - 5 G -四链体的形成没有影响。本研究的发现将丰富我们对原癌基因启动子中G -四链体形成以及基因表达调控机制的理解。
It is known that the guanine-rich strands in proto-oncogene promoters can fold into G-quadruplex structures to regulate gene expression. An intramolecular parallel G-quadruplex has been identified in MET promoter. It acts as a repressor in regulating MET expression. However, the full guanine-rich region in MET promoter forms a hybrid parallel/antiparallel G-quadruplex structure under physiological conditions, which means there are some antiparallel and hybrid parallel/antiparallel G-quadruplex structures in this region. In the present study, our data indicate that g3-5 truncation adopts an intramolecular hybrid parallel/antiparallel G-quadruplex under physiological conditions in vitro. The g3-5 G-quadruplex structure significantly stops polymerization by Klenow fragment in K+ buffer. Furthermore, the results of circular dichroism (CD) spectra and polymerase stop assay directly demonstrate that the G-quadruplex structure in g3-5 fragment can be stabilized by the G-quadruplex ligand TMPyP4 (5,10,15,20-tetra-(N-methyl-4-pyridyl) porphine). But the dual luciferase assay indicates TMPyP4 has no effect on the formation of g3-5 G-quadruplex in HepG2 cells. The findings in the present study will enrich our understanding of the G-quadruplex formation in proto-oncogene promoters and the mechanisms of gene expression regulation.
DOI: 10.1158/aacr.edb-ccr-06-0818
发表时间: 2008-04
期刊: Clinical cancer research : an official journal of the American Association for Cancer Research
影响因子: --
作者:
B. Peruzzi;D. Bottaro
通讯作者: B. Peruzzi;D. Bottaro
人 MET 启动子区域形成的分子内 G-四链体结构及其生物学相关性。
DOI: 10.1002/mc.22330
发表时间: 2016
影响因子: 4.6
作者:
Yan Jing;Zhao Xiaoyang;Liu Bo;Yuan Ying;Guan Yifu
通讯作者: Guan Yifu
DOI: 10.5483/bmbrep.2008.41.12.833
发表时间: 2008-12-31
期刊: BMB reports
影响因子: 3.8
作者:
You WK;McDonald DM
通讯作者: McDonald DM
DOI: 10.1007/978-3-030-15054-9_4
发表时间: 1902-05
期刊: The Mathematical Gazette
影响因子: --
作者:
M. Maksimovic;E. Omanovic-Miklicanin;A. Badnjević
通讯作者: M. Maksimovic;E. Omanovic-Miklicanin;A. Badnjević