Published October 19, 2011
| Version Accepted Version + Supplemental Material
Journal Article
Open
ATP-Stimulated, DNA-Mediated Redox Signaling by XPD, a DNA Repair and Transcription Helicase
Creators
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1.
California Institute of Technology
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2.
Lawrence Berkeley National Laboratory
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3.
Scripps Research Institute
Abstract
Using DNA-modified electrodes, we show DNA-mediated signaling by XPD, a helicase that contains a [4Fe-4S] cluster and is critical for nucleotide excision repair and transcription. The DNA-mediated redox signal resembles that of base excision repair proteins, with a DNA-bound redox potential of ~80 mV versus NHE. Significantly, this signal increases with ATP hydrolysis. Moreover, the redox signal is substrate-dependent, reports on the DNA conformational changes associated with enzymatic function, and may reflect a general biological role for DNA charge transport.
Additional Information
© 2011 American Chemical Society. Received: August 1, 2011. Publication Date (Web): September 22, 2011. This research was supported by the NIH (GM49216 to J.K.B. and CA112093 to J.A.T.) and the DOE (ENIGMA program under Contract No. DE-AC02-05CH11231 to J.A.T.). T.P.M. also thanks the NSF for a graduate fellowship.Attached Files
Accepted Version - nihms328262.pdf
Supplemental Material - ja207222t_si_001.pdf
Files
ja207222t_si_001.pdf
Additional details
Identifiers
- PMCID
- PMC3234108
- Eprint ID
- 27803
- Resolver ID
- CaltechAUTHORS:20111116-102627735
Funding
- NIH
- GM49216
- NIH
- CA112293
- Department of Energy (DOE)
- DE-AC02-05CH11231
- NSF Graduate Fellowship
Dates
- Created
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2011-11-16Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field