Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2009-2-13
pubmed:abstractText
Here we demonstrate a reagentless, electrochemical platform for the specific detection of proteins that bind to single- or double-stranded DNA. The sensor is composed of a double- or single-stranded, redox-tagged DNA probe which is covalently attached to an interrogating electrode. Upon protein binding the current arising from the redox tag is suppressed, indicating the presence of the target. Using this approach we have fabricated sensors against the double-stranded DNA binding proteins TATA-box binding protein and M.HhaI methyltransferase, and against the single-strand binding proteins Escherichia coli SSBP and replication protein A. All four targets are detected at nanomolar concentrations, in minutes, and in a convenient, general, readily reusable, electrochemical format. The approach is specific; we observed no significant cross-reactivity between the sensors. Likewise the approach is selective; it supports, for example, the detection of single strand binding protein directly in crude nuclear extracts. The generality of our approach (including its ability to detect both double- and single-strand binding proteins) and a strong, non-monotonic dependence of signal gain on probe density support a collisional signaling mechanism in which binding alters the collision efficiency, and thus electron transfer efficiency, of the attached redox tag. Given the ubiquity with which protein binding will alter the collisional dynamics of an oligonucleotide, we believe this approach may prove of general utility in the detection of DNA and RNA binding proteins.
pubmed:grant
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-10572185, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-10671528, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-10851046, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-11125145, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-11402056, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-11463946, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-12867594, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-14624859, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-14744435, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-14757035, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-16366535, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-16390138, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-16522082, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-16578931, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-16579614, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-16839757, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-16906710, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-17065320, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-17212391, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-17263380, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-17488132, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-17490681, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-17523600, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-17850085, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-18271589, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-18324816, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-18690727, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-7794913, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-7947831, http://linkedlifedata.com/resource/pubmed/commentcorrection/19199570-8157639
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1520-6882
pubmed:author
pubmed:issnType
Electronic
pubmed:day
15
pubmed:volume
81
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1608-14
pubmed:dateRevised
2010-12-17
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Reagentless, electrochemical approach for the specific detection of double- and single-stranded DNA binding proteins.
pubmed:affiliation
Dipartimento di Scienze e Tecnologie Chimiche, Universita di Roma Tor Vergata, Via della Ricerca Scientifica, 00133, Rome, Italy.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, N.I.H., Extramural