Comparison of simulated and experimentally determined dynamics for a variant of the Lacl DNA-binding domain, Nlac-P.
Comparison of simulated and experimentally determined dynamics for a variant of the Lacl DNA-binding domain, Nlac-P.
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Lacl DNA 结合域变体 Nlac-P 的模拟动力学与实验测定动力学的比较。
DOI:
10.1016/s0006-3495(98)77798-7
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发表时间:
1998
影响因子:
3.4
通讯作者:
Pettitt,BM
中科院分区:
文献类型:
--
作者:
Swint-Kruse,L;Matthews,KS;Smith,PE;Pettitt,BM
Recent advances in the experimentally determined structures and dynamics of the domains within LacI provide a rare context for evaluating dynamics calculations. A 1500-ps trajectory was simulated for a variant of the LacI DNA-binding domain, which consists of the first three helices in LacI and the hinge helix of the homologous PurR. Order parameters derived from dynamics simulations are compared to those obtained for the LacI DNA-binding domain with15N relaxation NMR spectroscopy (Slijper et al., 1997.Biochemistry. 36:249–254). The MD simulations suggest that the unstructured loop between helices II and III does not exist in a discrete state under the conditions of no salt and neutral pH, but occupies a continuum of states between the DNA-bound and free structures. Simulations also indicate that the unstructured region between helix III and the hinge helix is very mobile, rendering motions of the hinge helix essentially independent of the rest of the protein. Finally, theα-helical hydrogen bonds in the hinge helix are broken after 1250ps, perhaps as a prelude to helix unfolding.
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影响因子:
5.6
作者:
Monique Slijper;A. Bonvin;R. Boelens;R. Kaptein
通讯作者:
R. Kaptein
影响因子:
64.8
作者:
JOVIN, TM;GEISLER, N;WEBER, K
通讯作者:
WEBER, K
影响因子:
2.9
作者:
Williams, S;Causgrove, TP;Dyer, RB
通讯作者:
Dyer, RB
影响因子:
2.9
作者:
MORTON, A;MATTHEWS, BW
通讯作者:
MATTHEWS, BW
影响因子:
5.6
作者:
HA, JH;SPOLAR, RS;RECORD, MT
通讯作者:
RECORD, MT