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Cited by 604

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Dissection of the methyl-CpG binding domain from the chromosomal protein MeCP2

Open access
Nan, Xinsheng, Meehan, Richard R., Bird, Adrian·1993·Nucleic Acids Research

Abstract

MeCP2 is a chromosomal protein which binds to DNA that is methylated at CpG. In situ immunofluorescence in mouse cells has shown that the protein is most concentrated in pericentromeric heterochromatin, suggesting that MeCP2 may play a role in the formation of inert chromatin. Here we have isolated a minimal methyl-CpG binding domain (MBD) from MeCP2. MBD is 85 amino acids in length, and binds exclusively to DNA that contains one or more symmetrically methylated CpGs. MBD has negligable non-specific affinity for DNA, confirming that non-specific and methyl-CpG specific binding domains of MeCP2 are distinct. In vitro footprinting indicates that MBD binding can protect a 12 nucleotide region surrounding a methyl-CpG pair, with an approximate dissociation constant of 10(-9) M.

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Crossref · 10.1093/nar/21.21.4886

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Metadata

Authors
Nan, X., Meehan, R. R., & Bird, A.
Venue
Nucleic Acids Research
Published
1993
Volume
21
Issue
21
Pages
4886-4892
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2015353463
Cited by
604
References
1
FWCI
1.62
Type
journal article
Language
en
Open access
bronze

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