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• W2034882714 endingPage "e1002335" @default.
• W2034882714 startingPage "e1002335" @default.
• W2034882714 abstract "Optimizing amino acid conformation and identity is a central problem in computational protein design. Protein design algorithms must allow realistic protein flexibility to occur during this optimization, or they may fail to find the best sequence with the lowest energy. Most design algorithms implement side-chain flexibility by allowing the side chains to move between a small set of discrete, low-energy states, which we call rigid rotamers. In this work we show that allowing continuous side-chain flexibility (which we call continuous rotamers) greatly improves protein flexibility modeling. We present a large-scale study that compares the sequences and best energy conformations in 69 protein-core redesigns using a rigid-rotamer model versus a continuous-rotamer model. We show that in nearly all of our redesigns the sequence found by the continuous-rotamer model is different and has a lower energy than the one found by the rigid-rotamer model. Moreover, the sequences found by the continuous-rotamer model are more similar to the native sequences. We then show that the seemingly easy solution of sampling more rigid rotamers within the continuous region is not a practical alternative to a continuous-rotamer model: at computationally feasible resolutions, using more rigid rotamers was never better than a continuous-rotamer model and almost always resulted in higher energies. Finally, we present a new protein design algorithm based on the dead-end elimination (DEE) algorithm, which we call iMinDEE, that makes the use of continuous rotamers feasible in larger systems. iMinDEE guarantees finding the optimal answer while pruning the search space with close to the same efficiency of DEE.Software is available under the Lesser GNU Public License v3. Contact the authors for source code." @default.
• W2034882714 created "2016-06-24" @default.
• W2034882714 creator A5030585779 @default.
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• W2034882714 date "2012-01-12" @default.
• W2034882714 modified "2023-10-16" @default.
• W2034882714 title "Protein Design Using Continuous Rotamers" @default.
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• W2034882714 doi "https://doi.org/10.1371/journal.pcbi.1002335" @default.
• W2034882714 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3257257" @default.
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• W2034882714 hasPublicationYear "2012" @default.
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