Theoretical and experimental measures of DNA helix stability and their relation to sequence specific repair of O6-ethylguanine lesions.
Identifieur interne : 004861 ( Main/Exploration ); précédent : 004860; suivant : 004862Theoretical and experimental measures of DNA helix stability and their relation to sequence specific repair of O6-ethylguanine lesions.
Auteurs : C K Foley [États-Unis] ; L G Pedersen ; T A Darden ; B W Glickman ; M W AndersonSource :
- Mutation research [ 0027-5107 ] ; 1991.
Descripteurs français
- KwdFr :
- ADN bactérien (), ADN bactérien (métabolisme), Altération de l'ADN, Cinétique, Conformation d'acide nucléique, Données de séquences moléculaires, Escherichia coli (), Escherichia coli (génétique), Escherichia coli (métabolisme), Guanine (analogues et dérivés), Guanine (métabolisme), Méthanesulfonate d'éthyle (toxicité), Réparation de l'ADN (physiologie), Séquence nucléotidique, Thermodynamique.
- MESH :
- analogues et dérivés : Guanine.
- génétique : Escherichia coli.
- métabolisme : ADN bactérien, Escherichia coli, Guanine.
- physiologie : Réparation de l'ADN.
- toxicité : Méthanesulfonate d'éthyle.
- ADN bactérien, Altération de l'ADN, Cinétique, Conformation d'acide nucléique, Données de séquences moléculaires, Escherichia coli, Séquence nucléotidique, Thermodynamique.
English descriptors
- KwdEn :
- Base Sequence, DNA Damage, DNA Repair (physiology), DNA, Bacterial (chemistry), DNA, Bacterial (metabolism), Escherichia coli (drug effects), Escherichia coli (genetics), Escherichia coli (metabolism), Ethyl Methanesulfonate (toxicity), Guanine (analogs & derivatives), Guanine (metabolism), Kinetics, Molecular Sequence Data, Nucleic Acid Conformation, Thermodynamics.
- MESH :
- chemical , analogs & derivatives : Guanine.
- chemical , chemistry : DNA, Bacterial.
- chemical , metabolism : DNA, Bacterial, Guanine.
- drug effects : Escherichia coli.
- genetics : Escherichia coli.
- metabolism : Escherichia coli.
- physiology : DNA Repair.
- chemical , toxicity : Ethyl Methanesulfonate.
- Base Sequence, DNA Damage, Kinetics, Molecular Sequence Data, Nucleic Acid Conformation, Thermodynamics.
Abstract
Recent work (Breslauer et al. (1986) Proc. Natl. Acad. Sci. (U.S.A.), 83, 3746) has provided a method for calculating empirical thermodynamic quantities for helix to coil transitions from the base sequence of any oligomer. It is shown in this work that the DNA helix binding energy, calculated with the AMBER force field, for 9-mers of the type 5'-GGGXGeYGGG-3', where X and Y are any base and the central Ge is O6-ethylguanine, correlates well with the empirical delta G for helix to strand transitions. The mutation spectrum of ethane methylsulfonate (EMS) in the lacI gene of Escherichia coli can be modeled using the calculated local binding energy but the empirical free energies, enthalpies and melting temperatures predict these levels of repair less well. The relation of the binding energy to the mutation spectrum can be somewhat improved by including entropic effects in a theoretical free energy of binding as given by delta G theoretical identical to delta E binding - T delta S.
DOI: 10.1016/0921-8777(91)90021-g
PubMed: 2067552
Affiliations:
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Le document en format XML
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<term>DNA, Bacterial (chemistry)</term>
<term>DNA, Bacterial (metabolism)</term>
<term>Escherichia coli (drug effects)</term>
<term>Escherichia coli (genetics)</term>
<term>Escherichia coli (metabolism)</term>
<term>Ethyl Methanesulfonate (toxicity)</term>
<term>Guanine (analogs & derivatives)</term>
<term>Guanine (metabolism)</term>
<term>Kinetics</term>
<term>Molecular Sequence Data</term>
<term>Nucleic Acid Conformation</term>
<term>Thermodynamics</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>ADN bactérien ()</term>
<term>ADN bactérien (métabolisme)</term>
<term>Altération de l'ADN</term>
<term>Cinétique</term>
<term>Conformation d'acide nucléique</term>
<term>Données de séquences moléculaires</term>
<term>Escherichia coli ()</term>
<term>Escherichia coli (génétique)</term>
<term>Escherichia coli (métabolisme)</term>
<term>Guanine (analogues et dérivés)</term>
<term>Guanine (métabolisme)</term>
<term>Méthanesulfonate d'éthyle (toxicité)</term>
<term>Réparation de l'ADN (physiologie)</term>
<term>Séquence nucléotidique</term>
<term>Thermodynamique</term>
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<term>Kinetics</term>
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<term>Données de séquences moléculaires</term>
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<front><div type="abstract" xml:lang="en">Recent work (Breslauer et al. (1986) Proc. Natl. Acad. Sci. (U.S.A.), 83, 3746) has provided a method for calculating empirical thermodynamic quantities for helix to coil transitions from the base sequence of any oligomer. It is shown in this work that the DNA helix binding energy, calculated with the AMBER force field, for 9-mers of the type 5'-GGGXGeYGGG-3', where X and Y are any base and the central Ge is O6-ethylguanine, correlates well with the empirical delta G for helix to strand transitions. The mutation spectrum of ethane methylsulfonate (EMS) in the lacI gene of Escherichia coli can be modeled using the calculated local binding energy but the empirical free energies, enthalpies and melting temperatures predict these levels of repair less well. The relation of the binding energy to the mutation spectrum can be somewhat improved by including entropic effects in a theoretical free energy of binding as given by delta G theoretical identical to delta E binding - T delta S.</div>
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