Linked Life Data

10518942

Source:http://linkedlifedata.com/resource/pubmed/id/10518942

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1999-10-19
pubmed:databankReference
pubmed:abstractText
MeCP2 is an abundant mammalian protein that binds methylated CpG (mCpG) sequences within double-stranded DNA, represses transcription by recruiting histone deacetylases, and is essential for embryonic development. It is one of a family of proteins which mediate the biological consequences of DNA methylation. These proteins each possess a sequence motif of about 70 residues which, in MeCP2, form a domain necessary and sufficient for binding to mCpG. The solution structure of the mCpG-binding domain (MBD) from MeCP2 has been solved and the DNA-binding surface of the domain mapped using NMR spectroscopy. Residues 95-162 of MeCP2 adopt a novel fold forming a wedge-shaped structure. An N-terminal four-stranded antiparallel beta-sheet forms one face of the wedge, while the other face is formed mainly by a C-terminal helical region. The thin end of the wedge is extended by a long loop between beta-strands B and C containing many basic residues. The B-C loop together with residues in strands B, C and D, and at the N terminus of the alpha-helix, appears to form an interface with methylated DNA. Unstructured residues at the NH2 terminus of the domain are also involved in formation of the complex. The presence of numerous arginine and lysine side-chains on the DNA-binding surface of MBD is consistent with the requirement for the mCpG site to be flanked by non-specific sequences of base-pairs. The absence of symmetry in the domain implies that recognition does not exploit the symmetry of the binding site. A conserved hydrophobic pocket containing the side-chains of Tyr123 and Ile125 on the positively charged beta-sheet face is a candidate for the region of contact with the methyl-groups of the modified cytosine residues.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0022-2836
pubmed:author
pubmed:issnType
Print
pubmed:day
3
pubmed:volume
291
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1055-65
pubmed:dateRevised
2009-9-29
pubmed:meshHeading
pubmed-meshheading:10518942-Amino Acid Sequence, pubmed-meshheading:10518942-Binding Sites, pubmed-meshheading:10518942-Chromosomal Proteins, Non-Histone, pubmed-meshheading:10518942-Conserved Sequence, pubmed-meshheading:10518942-CpG Islands, pubmed-meshheading:10518942-DNA, pubmed-meshheading:10518942-DNA Methylation, pubmed-meshheading:10518942-DNA-Binding Proteins, pubmed-meshheading:10518942-Methyl-CpG-Binding Protein 2, pubmed-meshheading:10518942-Models, Molecular, pubmed-meshheading:10518942-Molecular Sequence Data, pubmed-meshheading:10518942-Nuclear Magnetic Resonance, Biomolecular, pubmed-meshheading:10518942-Peptide Fragments, pubmed-meshheading:10518942-Protein Conformation, pubmed-meshheading:10518942-Protein Folding, pubmed-meshheading:10518942-Recombinant Fusion Proteins, pubmed-meshheading:10518942-Repressor Proteins, pubmed-meshheading:10518942-Solutions, pubmed-meshheading:10518942-Structure-Activity Relationship
pubmed:year
1999
pubmed:articleTitle
The solution structure of the domain from MeCP2 that binds to methylated DNA.
pubmed:affiliation
Edinburgh Centre for Protein Technology, University of Edinburgh, UK.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't