Linked Life Data

10556030

Source:http://linkedlifedata.com/resource/pubmed/id/10556030

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2000-1-10
pubmed:abstractText
The high mobility group (HMG) domain is a DNA binding motif found in some eukaryotic chromosomal proteins and transcription factors. This domain binds in the minor groove of DNA inducing a sharp bend and also preferentially binds to certain distorted DNA structures. Although structures of sequence-specific HMG domains with their cognate double-helical DNA binding sites have been solved, the nature of the interaction of the domain with distorted DNA remains to be established. In this study we have investigated the interaction of HMG-D, a Drosophila counterpart of the vertebrate HMG1, with a DNA oligomer containing a bulge of two adenine residues. We show by footprinting that HMG-D binds preferentially on one side of the bulged DNA. Based on these data and on the published NMR structures of the HMG domain of HMG-D and the LEF-1-DNA complex, we modelled the HMG-D - bulged DNA complex. This model predicts that two residues, Val32 and Thr33, in the loop between alpha-helices I and II are inserted deep into the "hole" in the DNA formed by the two missing bases on one strand of the DNA bulge. Mutation of these residues confirmed that both are required for the efficient binding and bending of DNA by HMG-D. We discuss both the role of this loop in the recognition of distorted DNA structures by non-sequence specific HMG domain proteins and that of the basic tail in stabilising the induced DNA bend.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0022-2836
pubmed:author
pubmed:copyrightInfo
Copyright 1999 Academic Press.
pubmed:issnType
Print
pubmed:day
19
pubmed:volume
294
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
79-91
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:10556030-Amino Acid Sequence, pubmed-meshheading:10556030-Binding Sites, pubmed-meshheading:10556030-Conserved Sequence, pubmed-meshheading:10556030-DNA, pubmed-meshheading:10556030-DNA, Circular, pubmed-meshheading:10556030-DNA Footprinting, pubmed-meshheading:10556030-DNA-Binding Proteins, pubmed-meshheading:10556030-High Mobility Group Proteins, pubmed-meshheading:10556030-Hydroxyl Radical, pubmed-meshheading:10556030-Lymphoid Enhancer-Binding Factor 1, pubmed-meshheading:10556030-Models, Molecular, pubmed-meshheading:10556030-Molecular Sequence Data, pubmed-meshheading:10556030-Nucleic Acid Conformation, pubmed-meshheading:10556030-Protein Structure, Secondary, pubmed-meshheading:10556030-Protein Structure, Tertiary, pubmed-meshheading:10556030-Transcription Factors
pubmed:year
1999
pubmed:articleTitle
The recognition of distorted DNA structures by HMG-D: a footprinting and molecular modelling study.
pubmed:affiliation
Laboratory of Molecular Biology, Medical Research Council, Hills Road, Cambridge, CB2 2QH, UK.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't