Engineering a high-affinity methyl-CpG-binding protein.

Engineering a high-affinity methyl-CpG-binding protein.
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DOI:
10.1093/nar/gkl527
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发表时间:
2006-08-07
影响因子:
14.9
通讯作者:
Bird AP
Bird AP
中科院分区:
生物学2区
文献类型:
--
作者:
Jørgensen HF;Adie K;Chaubert P;Bird AP

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MBD蛋白家族的核心成员(MeCP2、MBD1、MBD2和MBD4)共享一个甲基-CpG结合结构域,该结构域对双链DNA中甲基化的CpG位点具有特异性亲和力。通过聚合Mbd1的MDB结构域,我们设计了一种多聚MBD蛋白,该蛋白在体外显示甲基cpg特异性结合,其解离常数比单体MBD高50倍。Poly-MBD蛋白也定位于细胞中甲基化的病灶,并可以在体内向报告蛋白构建体传递一个功能域。我们提出poly-MBD蛋白是检测分离的天然DNA甲基化水平和染色体CpG甲基化的细胞学检测的敏感试剂。
Core members of the MBD protein family (MeCP2, MBD1, MBD2 and MBD4) share a methyl-CpG-binding domain that has a specific affinity for methylated CpG sites in double-stranded DNA. By multimerizing the MDB domain of Mbd1, we engineered a poly-MBD protein that displays methyl-CpG-specific binding in vitro with a dissociation constant that is >50-fold higher than that of a monomeric MBD. Poly-MBD proteins also localize to methylated foci in cells and can deliver a functional domain to reporter constructs in vivo. We propose that poly-MBD proteins are sensitive reagents for the detection of DNA methylation levels in isolated native DNA and for cytological detection of chromosomal CpG methylation.
DOI: 10.1093/nar/gkl527
发表时间: 2006-08-07
影响因子: 14.9
作者:
Jørgensen HF;Adie K;Chaubert P;Bird AP
通讯作者: Bird AP
DOI: 10.1038/ng0797-256
发表时间: 1997-07-01
期刊: NATURE GENETICS
影响因子: 30.8
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Cross, SH;Meehan, RR;Bird, A
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DOI: 10.1016/0092-8674(95)90140-x
发表时间: 1995-12-29
期刊: CELL
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通讯作者: Laemmli, UK
DOI: 10.1006/bbrc.1993.1750
发表时间: 1993-06-30
影响因子: 3.1
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BALAGHI, M;WAGNER, C
通讯作者: WAGNER, C
DOI: 10.1038/30764
发表时间: 1998-05-28
期刊: NATURE
影响因子: 64.8
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