A spin-1 representation for dual-funnel energy landscapes.
A spin-1 representation for dual-funnel energy landscapes.
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DOI:
10.1063/1.5036677
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发表时间:
2018-07-21
期刊:
影响因子:
--
通讯作者:
Zwolak M
中科院分区:
文献类型:
--
作者:
Elenewski JE;Velizhanin KA;Zwolak M
The interconversion between left– and right–handed helical folds of a polypeptide defines a dual–funneled free energy landscape. In this context, the funnel minima are connected through a continuum of unfolded conformations, evocative of the classical helix–coil transition. Physical intuition and recent conjectures suggest that this landscape can be mapped by assigning a left– or right–handed helical state to each residue. We explore this possibility using all–atom replica exchange molecular dynamics and an Ising–like model, demonstrating that the energy landscape architecture is at odds with a two–state picture. A three–state model – left, right, and unstructured – can account for most key intermediates during chiral interconversion. Competing folds and excited conformational states still impose limitations on the scope of this approach. However, the improvement is stark: Moving from a two-state to a three-state model decreases the fit error from 1.6 kBT to 0.3 kBT along the left-to-right interconversion pathway.
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影响因子:
--
作者:
BRYNGELSON, JD;WOLYNES, PG
通讯作者:
WOLYNES, PG
影响因子:
3.4
作者:
Chakrabarti, Dwaipayan;Wales, David J.
通讯作者:
Wales, David J.
影响因子:
5.5
作者:
Best, Robert B.;Zhu, Xiao;Shim, Jihyun;Lopes, Pedro E. M.;Mittal, Jeetain;Feig, Michael;MacKerell, Alexander D., Jr.
通讯作者:
MacKerell, Alexander D., Jr.
影响因子:
3.3
作者:
Chakraborty, Debayan;Wales, David J.
通讯作者:
Wales, David J.
DOI:
10.1073/pnas.84.21.7524
发表时间:
1987-11-01
影响因子:
11.1
作者:
BRYNGELSON, JD;WOLYNES, PG
通讯作者:
WOLYNES, PG