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Incorporation of noncanonical amino acids into Rosetta and use in computational protein-peptide interface design.


ABSTRACT: Noncanonical amino acids (NCAAs) can be used in a variety of protein design contexts. For example, they can be used in place of the canonical amino acids (CAAs) to improve the biophysical properties of peptides that target protein interfaces. We describe the incorporation of 114 NCAAs into the protein-modeling suite Rosetta. We describe our methods for building backbone dependent rotamer libraries and the parameterization and construction of a scoring function that can be used to score NCAA containing peptides and proteins. We validate these additions to Rosetta and our NCAA-rotamer libraries by showing that we can improve the binding of a calpastatin derived peptides to calpain-1 by substituting NCAAs for native amino acids using Rosetta. Rosetta (executables and source), auxiliary scripts and code, and documentation can be found at (http://www.rosettacommons.org/).

SUBMITTER: Renfrew PD 

PROVIDER: S-EPMC3303795 | biostudies-literature | 2012

REPOSITORIES: biostudies-literature

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Incorporation of noncanonical amino acids into Rosetta and use in computational protein-peptide interface design.

Renfrew P Douglas PD   Choi Eun Jung EJ   Bonneau Richard R   Kuhlman Brian B  

PloS one 20120314 3


Noncanonical amino acids (NCAAs) can be used in a variety of protein design contexts. For example, they can be used in place of the canonical amino acids (CAAs) to improve the biophysical properties of peptides that target protein interfaces. We describe the incorporation of 114 NCAAs into the protein-modeling suite Rosetta. We describe our methods for building backbone dependent rotamer libraries and the parameterization and construction of a scoring function that can be used to score NCAA cont  ...[more]

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