Introduction

SUMMARY: Model Quality Assessment Programs (MQAPs) are used to predict the quality of modeled protein structures. These usually use two approaches: methods using consensus of many alternative models and methods requiring only a single model to do its prediction. The consensus methods are useful to improve overall accuracy; however, they frequently fail to pick out the best possible model and cannot be used to generate and score new structures. Single-model methods, on the other hand, do not have these inherent shortcomings and can be used to both sample new structures and improve existing consensus methods. Here, we present ProQM-resample, a membrane protein-specific single-model MQAP, that couples side-chain resampling with MQAP rescoring by ProQM to improve model selection. The side-chain resampling is able to improve side-chain packing for 96% of all models, and improve model selection by 24% as measured by the sum of the Z-score for the first-ranked model (from 25.0 to 31.1), even better than the state-of-the-art consensus method Pcons. The improved model selection can be attributed to the improved side-chain quality, which enables the MQAP to rescue good backbone models with poor side-chain packing. AVAILABILITY AND IMPLEMENTATION: http://proqm.wallnerlab.org/download/. CONTACT: bjornw@ifm.liu.se SUPPLEMENTARY INFORMATION: Supplementary data are available at Bioinformatics online.

Publications

  1. ProQM-resample: improved model quality assessment for membrane proteins by limited conformational sampling.
    Cite this
    Wallner B, 2014-08-01 - Bioinformatics (Oxford, England)

Credits

  1. Björn Wallner
    Investigator

    Department of Physics, Chemistry and Biology, Sweden

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Summary
AccessionBT001953
Tool TypeApplication
Category
PlatformsLinux/Unix
TechnologiesPerl
User InterfaceTerminal Command Line
Download Count0
Country/RegionSweden
Submitted ByBjörn Wallner