DNA duplex stability: the role of preorganized electrostatics.
DNA duplex stability: the role of preorganized electrostatics.
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DOI:
10.1021/jp9064246
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发表时间:
2010-03-04
期刊:
影响因子:
--
通讯作者:
Florián J
中科院分区:
文献类型:
--
作者:
Bren U;Lah J;Bren M;Martínek V;Florián J
The insertion of a DNA base moiety at the end of a DNA duplex to form a Watson-Crick or wobble pair during DNA annealing or replication is a step of fundamental biological importance. Therefore, we investigated the energetics of a formation of the terminal G•C, G•T and G•A base pairs in DNA containing a 5’-dangling G adjacent to the base insertion point using differential scanning calorimetry (DSC) and computer simulations. The energies calculated along classical molecular dynamics trajectories in aqueous solution were analyzed in the framework of linear-response approximation (LRA) to obtain relative free energies for the base insertion and their electrostatic, van der Waals and preorganization components. Using the generic set of LRA parameters the calculated free energies disfavored the mispair formation by 2.5 (G•C -> G•T) and 1.7 (G•C -> G•A) kcal/mol, in reasonable agreement with the experimental free energy differences of 1.8 and 1.4 kcal/mol, respectively. The calculated preorganization components of these free energies of 0.6 (G•C -> G•T) and −0.1 (G•C -> G•A) kcal/mol show that electrostatic preorganization, which is an important source of DNA replication fidelity, plays lesser role in the mispair destabilization in the absence of DNA polymerase.
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影响因子:
2.9
作者:
CUNIASSE, P;SOWERS, LC;FAZAKERLEY, GV
通讯作者:
FAZAKERLEY, GV
影响因子:
3.3
作者:
Florián, J;Warshel, A;Goodman, MF
通讯作者:
Goodman, MF
影响因子:
4.4
作者:
KING, G;WARSHEL, A
通讯作者:
WARSHEL, A
DOI:
10.1093/protein/7.3.385
发表时间:
1994-03-01
期刊:
PROTEIN ENGINEERING
影响因子:
--
作者:
AQVIST, J;MEDINA, C;SAMUELSSON, JE
通讯作者:
SAMUELSSON, JE
影响因子:
2.9
作者:
Florián, J;Goodman, MF;Warshel, A
通讯作者:
Warshel, A