Long range correlations in DNA scaling properties and charge transfer efficiency.pdf

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2017-04-11 发布于江苏
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Long range correlations in DNA scaling properties and charge transfer efficiency.pdf

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Long range correlations in DNA scaling properties and charge transfer efficiency

a r X i v : c o n d - m a t / 0 3 0 9 4 6 3 v 1 [ c o n d - m a t .m e s - h a l l ] 1 9 S e p 2 0 0 3 Long range correlations in DNA : scaling properties and charge transfer efficiency Stephan Roche 1, Dominique Bicout 2, Enrique Macia? 3, Efim Kats 2,4 1 Commissariat a? l’E?nergie Atomique, DSM/DRFMC/SPSMS, 17 avenue des Martyrs, 38054 Grenoble, France 2Laue-Langevin Institute, 6 rue Jules Horowitz, BP 156, F-38042, Grenoble, France 3 Departamento de Fisica de Materiales, Facultad de Fisicas, Universidad Complutense, E-28040 Madrid, Spain 4L. D. Landau Institute for Theoretical Physics, RAS, Moscow, Russia (February 2, 2008) Abstract We address the relation between long range correlations and charge transfer efficiency in aperiodic artificial or genomic DNA sequences. Coherent charge transfer through the HOMO states of the guanine nucleotide is studied using the transmission approach, and focus is made on how the sequence-dependent backscattering profile can be inferred from correlations between base pairs. PACS numbers: 87.14.Gg, 72.20.Ee, 72.80.Le Typeset using REVTEX 1 During the past few years, the nature of long range correlations in DNA sequences has been the subject of intense debate [1–3]. Scale invariant properties in complex genomic sequences with thousands of nucleotides have been investigated in particular with wavelet analysis [2], and have been argued to play crucial role in gene regulation and cell division. Be- sides, amongst the many physical, chemical or biological phenomena that might be inferred from sequence correlations, charge transfer properties deserve particular concern. Indeed, a precise understanding of DNA-mediated charge migration would have strong impact on the description of damage recognition process and protein binding, or in engineering biological processes [4,5]. The π-stacked array of DNA base pairs (bp) (made up from nucleotides: guanine g, adenine a, cytosine c, thymine t) provides an extended path to convey long rang