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Preprocessing of rotamers for protein design calculations

Shah, Premal S. and Hom, Geoffrey K. and Mayo, Stephen L. (2004) Preprocessing of rotamers for protein design calculations. Journal of Computational Chemistry, 25 (14). pp. 1797-1800. ISSN 0192-8651. http://resolver.caltech.edu/CaltechAUTHORS:20110913-173425840

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Abstract

We have developed a process that significantly reduces the number of rotamers in computational protein design calculations. This process, which we call Vegas, results in dramatic computational performance increases when used with algorithms based on the dead-end elimination (DEE) theorem. Vegas estimates the energy of each rotamer at each position by fixing each rotamer in turn and utilizing various search algorithms to optimize the remaining positions. Algorithms used for this context specific optimization can include Monte Carlo, self-consistent mean field, and the evaluation of an expression that generates a lower bound energy for the fixed rotamer. Rotamers with energies above a user-defined cutoff value are eliminated. We found that using Vegas to preprocess rotamers significantly reduced the calculation time of subsequent DEE-based algorithms while retaining the global minimum energy conformation. For a full boundary design of a 51 amino acid fragment of engrailed homeodomain, the total calculation time was reduced by 12-fold.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/jcc.20097 DOIUNSPECIFIED
http://onlinelibrary.wiley.com/doi/10.1002/jcc.20097/abstractPublisherUNSPECIFIED
Additional Information:© 2004 Wiley Periodicals, Inc. Received 23 April 2004; Accepted 12 June 2004. Article first published online: 27 Aug. 2004. Contract/grant sponsor: National Institutes of Health (P.S.S. and G.K.H.). Contract/grant sponsor: Howard Hughes Medical Institute (S.L.M.). Contract/grant sponsor: Ralph M. Parsons Foundation (S.L.M.). Contract/grant sponsor: IBM Shared University Research Grant (S.L.M.). The authors would like to thank Marie Ary for critical review of the manuscript and offering valuable comments.
Funders:
Funding AgencyGrant Number
NIHUNSPECIFIED
Howard Hughes Medical Institute (HHMI)UNSPECIFIED
Ralph M. Parsons FoundationUNSPECIFIED
IBM Shared University Research GrantUNSPECIFIED
Subject Keywords:Proteins; Algorithms; Protein Conformation; protein design; side-chain placement; dead-end elimination
Record Number:CaltechAUTHORS:20110913-173425840
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20110913-173425840
Official Citation:Shah, P. S., Hom, G. K. and Mayo, S. L. (2004), Preprocessing of rotamers for protein design calculations. Journal of Computational Chemistry, 25: 1797–1800. doi: 10.1002/jcc.20097
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:25332
Collection:CaltechAUTHORS
Deposited By: Marie Ary
Deposited On:23 Sep 2011 22:56
Last Modified:23 Sep 2011 22:56

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