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• W1531421905 abstract "Predicting protein 3D structure from amino acid sequence remains as a challenge in the field of computational biology. If protein structure homologues are not found, one has to construct 3D structural conformations from the very beginning by the so-called ab initio approach, using some empirical energy functions. A successful algorithm in this category, Rosetta, creates an ensemble of decoy conformations by assembling selected best short fragments of known protein structures and then recognizes the native state as the highly populated one with a very low energy. Typically, an energy function is a combination of a variety of terms characterizing different structural features, say hydrophobic interactions, van der Waals force, hydrogen bonding, etc. It is critical for an energy function to be capable to distinguish native-like conformations from non-native ones and to drive most initial conformations assembled from fragments to a native-like one in a conformation search process. In this paper we propose a linear programming algorithm to optimize weighting of a total of 14 energy terms used in Rosetta. We reverse the Monte Carlo process of Rosetta to approach native-like conformations to a process generating from the native state an ensemble of initial conformations most relevant to the native state. Intuitively, an ideal weighting scheme would result in a large of of the native structure, which leads to an objective function for the linear programming. We have examined the proposal on several benchmark proteins, and the experimental results suggest that the optimized weights enlarge the attraction basin of the native state and improve the quality of the predicted native states as well. In addition, a comparison of optimal weighting schema for proteins of different classes indicates that in different protein classes energy terms may have different effects." @default.
• W1531421905 created "2016-06-24" @default.
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• W1531421905 date "2013-12-25" @default.
• W1531421905 modified "2023-09-27" @default.
• W1531421905 title "Optimizing weights of protein energy function to improve ab initio protein structure prediction" @default.
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• W1531421905 hasPublicationYear "2013" @default.
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