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Electronic structure study of the bases in DNA duplexes by in situ photon-in/photon-out soft X-ray spectroscopy

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Title: Electronic structure study of the bases in DNA duplexes by in situ photon-in/photon-out soft X-ray spectroscopy
Authors: Guo, J.-H.1 jguo@lbl.gov, Kastanov, S.1,2, Soderstrom, J.1,3, Glans, P.-A.1, West, M.1, Learmonth, T.4, Chiou, J.-W.5, Luo, Y.2, Nordgren, J.3, Smith, K.4, Pong, W.-F.5, Cheng, H.6, Griffiss, J.M.6
Source: Journal of Electron Spectroscopy & Related Phenomena. Aug2010, Vol. 181 Issue 2/3, p197-201. 5p.
Subjects: Electronic structure, Photons, Chemical bonds, Protein structure, Charge transfer, X-ray spectroscopy
Abstract: Abstract: Understanding protein functionality is of fundamental importance in biochemistry. Soft X-ray transitions, where the core-level vacancies are filled by the valence-orbital electrons, give direct information about the chemical bonding. Soft X-ray absorption and emission study of poly(dG) -poly(dC) in aqueous solutions can elucidate the relation between the structure and functionality of proteins. We report the N K-edge soft X-ray absorption (XAS) and resonant soft X-ray emission spectroscopy (XES) to characterize the electronic structure near the Fermi level of DNA duplexes to specify the charge migration mechanism. Since N atoms are included in only bases in DNA duplexes, the XES spectra excited from N 1s to unoccupied states purely extract the electronic orbital features of the bases in DNA. The fact that N atoms in different bonding environments form well-defined structure has been determined. The experimental findings provide the evidence for the charge-hopping and/or charge-transfer effects in understanding of electric conduction in DNA duplexes when electrons pass through the π* states of DNA bases. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Electron Spectroscopy & Related Phenomena is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 53332226
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Electronic structure study of the bases in DNA duplexes by in situ photon-in/photon-out soft X-ray spectroscopy
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  Data: <searchLink fieldCode="AR" term="%22Guo%2C+J%2E-H%2E%22">Guo, J.-H.</searchLink><relatesTo>1</relatesTo><i> jguo@lbl.gov</i><br /><searchLink fieldCode="AR" term="%22Kastanov%2C+S%2E%22">Kastanov, S.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Soderstrom%2C+J%2E%22">Soderstrom, J.</searchLink><relatesTo>1,3</relatesTo><br /><searchLink fieldCode="AR" term="%22Glans%2C+P%2E-A%2E%22">Glans, P.-A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22West%2C+M%2E%22">West, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Learmonth%2C+T%2E%22">Learmonth, T.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Chiou%2C+J%2E-W%2E%22">Chiou, J.-W.</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Luo%2C+Y%2E%22">Luo, Y.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Nordgren%2C+J%2E%22">Nordgren, J.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Smith%2C+K%2E%22">Smith, K.</searchLink><relatesTo>4</relatesTo><br /><searchLink fieldCode="AR" term="%22Pong%2C+W%2E-F%2E%22">Pong, W.-F.</searchLink><relatesTo>5</relatesTo><br /><searchLink fieldCode="AR" term="%22Cheng%2C+H%2E%22">Cheng, H.</searchLink><relatesTo>6</relatesTo><br /><searchLink fieldCode="AR" term="%22Griffiss%2C+J%2EM%2E%22">Griffiss, J.M.</searchLink><relatesTo>6</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Electron+Spectroscopy+%26+Related+Phenomena%22">Journal of Electron Spectroscopy & Related Phenomena</searchLink>. Aug2010, Vol. 181 Issue 2/3, p197-201. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Electronic+structure%22">Electronic structure</searchLink><br /><searchLink fieldCode="DE" term="%22Photons%22">Photons</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+bonds%22">Chemical bonds</searchLink><br /><searchLink fieldCode="DE" term="%22Protein+structure%22">Protein structure</searchLink><br /><searchLink fieldCode="DE" term="%22Charge+transfer%22">Charge transfer</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+spectroscopy%22">X-ray spectroscopy</searchLink>
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  Data: Abstract: Understanding protein functionality is of fundamental importance in biochemistry. Soft X-ray transitions, where the core-level vacancies are filled by the valence-orbital electrons, give direct information about the chemical bonding. Soft X-ray absorption and emission study of poly(dG) -poly(dC) in aqueous solutions can elucidate the relation between the structure and functionality of proteins. We report the N K-edge soft X-ray absorption (XAS) and resonant soft X-ray emission spectroscopy (XES) to characterize the electronic structure near the Fermi level of DNA duplexes to specify the charge migration mechanism. Since N atoms are included in only bases in DNA duplexes, the XES spectra excited from N 1s to unoccupied states purely extract the electronic orbital features of the bases in DNA. The fact that N atoms in different bonding environments form well-defined structure has been determined. The experimental findings provide the evidence for the charge-hopping and/or charge-transfer effects in understanding of electric conduction in DNA duplexes when electrons pass through the π* states of DNA bases. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of Electron Spectroscopy & Related Phenomena is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.elspec.2010.05.014
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        Text: English
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        PageCount: 5
        StartPage: 197
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      – SubjectFull: Electronic structure
        Type: general
      – SubjectFull: Photons
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      – SubjectFull: Chemical bonds
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      – SubjectFull: Protein structure
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