Linked Life Data

19378191

Source:http://linkedlifedata.com/resource/pubmed/id/19378191

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PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
2009-4-20
pubmed:abstractText
Assaying sequence-specific DNA-protein complex formation in vitro often involves the use of specific labelling or modification of the components of the complex to provide unique signals that can be used to assess the affinity of the interaction. Surface plasmon resonance (SPR) spectroscopy is an optical technique that can be used without radio- or other labelling of the components of a complex provided that one of the partners can be immobilised to a solid support. For DNA oligonucleotides this can easily be achieved by the incorporation of a biotin end label, but proteins can also be immobilised if they carry conventional tags for affinity purification, such as GST or polyhistidine extensions. The SPR effect relies on changes in the refractive index of solutions adjacent to the immobilised surface and is extremely sensitive. The continuous flow systems developed by BIAcore AB (now GE Healthcare Biosciences AB) permit real-time recording of the binding and dissociation of analyte species to the immobilised ligand, resulting in both rapid stoichiometric kinetic, affinity, and thermodynamic measurements. These assays can be carried out with complex mixtures of analytes, providing a powerful addition to the techniques available to probe such interactions. We illustrate the use of such assays here using the example of the E. coli methionine repressor, MetJ, which is also described in Chapters "Filter-Binding Assays" and "Ethylation Interference Footprinting of DNA-Protein Complexes."
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1064-3745
pubmed:author
pubmed:issnType
Print
pubmed:volume
543
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
653-69
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Surface plasmon resonance assays of DNA-protein interactions.
pubmed:affiliation
Astbury Centre for Structural Molecular Biology, University of Leeds, Leeds, LS2 9JT, UK.
pubmed:publicationType
Journal Article