dorsal/arxiv
View SchemaSubstructural cooperativity and parallel versus sequential events during protein unfolding
| Authors | Lothar Reich, Thomas R. Weikl |
|---|---|
| Categories | |
| ArXiv ID | q-bio/0601046 |
| URL | https://arxiv.org/abs/q-bio/0601046 |
Abstract
According to the 'old view', proteins fold along well-defined sequential pathways, whereas the 'new view' sees protein folding as a highly parallel stochastic process on funnel-shaped energy landscapes. We have analyzed parallel and sequential processes on a large number of Molecular Dynamics unfolding trajectories of the protein CI2 at high temperatures. Using rigorous statistical measures, we quantify the degree of sequentiality on two structural levels. The unfolding process is highly parallel on the microstructural level of individual contacts. On a coarser, macrostructural level of contact clusters, characteristic parallel and sequential events emerge. These characteristic events can be understood from loop-closure dependencies between the contact clusters. A correlation analysis of the unfolding times of the contacts reveals a high degree of substructural cooperativity within the contact clusters.
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"abstract": "According to the \u0027old view\u0027, proteins fold along well-defined sequential\npathways, whereas the \u0027new view\u0027 sees protein folding as a highly parallel\nstochastic process on funnel-shaped energy landscapes. We have analyzed\nparallel and sequential processes on a large number of Molecular Dynamics\nunfolding trajectories of the protein CI2 at high temperatures. Using rigorous\nstatistical measures, we quantify the degree of sequentiality on two structural\nlevels. The unfolding process is highly parallel on the microstructural level\nof individual contacts. On a coarser, macrostructural level of contact\nclusters, characteristic parallel and sequential events emerge. These\ncharacteristic events can be understood from loop-closure dependencies between\nthe contact clusters. A correlation analysis of the unfolding times of the\ncontacts reveals a high degree of substructural cooperativity within the\ncontact clusters.",
"arxiv_id": "q-bio/0601046",
"authors": [
"Lothar Reich",
"Thomas R. Weikl"
],
"categories": [
"q-bio.BM",
"cond-mat.soft"
],
"title": "Substructural cooperativity and parallel versus sequential events during protein unfolding",
"url": "https://arxiv.org/abs/q-bio/0601046"
},
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