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Default BCL::Fold - protein topology determination from limited NMR restraints.

BCL::Fold - protein topology determination from limited NMR restraints.

Related Articles BCL::Fold - protein topology determination from limited NMR restraints.

Proteins. 2013 Oct 1;

Authors: Weiner BE, Alexander N, Akin LR, Woetzel N, Karakas M, Meiler J

Abstract
When experimental protein NMR data is too sparse to apply traditional structure determination techniques, de novo protein structure prediction methods can be leveraged. Here we describe the incorporation of NMR restraints into the protein structure prediction algorithm BCL::Fold. The method assembles discreet secondary structure elements using a Monte Carlo sampling algorithm with a consensus knowledge-based energy function. New components were introduced into the energy function to accommodate chemical shift, nuclear Overhauser effect, and residual dipolar coupling data. In particular, since side chains are not explicitly modeled during the minimization process, a knowledge based potential was created to relate experimental side chain proton-proton distances to C? -C? distances. In a benchmark test of 67 proteins of known structure with the incorporation of sparse NMR restraints, the correct topology was sampled in 65 cases, with an average best model RMSD100 of 3.4 1.3 versus 6.0 2.0 produced with the de novo method. Additionally, the correct topology is present in the best scoring 1% of models in 61 cases. The benchmark set includes both soluble and membrane proteins with up to 565 residues, indicating the method is robust and applicable to large and membrane proteins that are less likely to produce rich NMR datasets. Proteins 2013;. 2013 Wiley Periodicals, Inc.


PMID: 24123100 [PubMed - as supplied by publisher]



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