Incorporation of local structural preference potential improves fold recognition

PLoS One. 2011 Feb 18;6(2):e17215. doi: 10.1371/journal.pone.0017215.

Abstract

Fold recognition, or threading, is a popular protein structure modeling approach that uses known structure templates to build structures for those of unknown. The key to the success of fold recognition methods lies in the proper integration of sequence, physiochemical and structural information. Here we introduce another type of information, local structural preference potentials of 3-residue and 9-residue fragments, for fold recognition. By combining the two local structural preference potentials with the widely used sequence profile, secondary structure information and hydrophobic score, we have developed a new threading method called FR-t5 (fold recognition by use of 5 terms). In benchmark testings, we have found the consideration of local structural preference potentials in FR-t5 not only greatly enhances the alignment accuracy and recognition sensitivity, but also significantly improves the quality of prediction models.

Publication types

  • Comparative Study
  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence / physiology
  • Computational Biology / methods
  • Databases, Protein
  • Hydrophobic and Hydrophilic Interactions
  • Models, Biological
  • Models, Molecular
  • Pattern Recognition, Automated / methods*
  • Peptide Fragments / analysis
  • Peptide Fragments / chemistry
  • Protein Conformation*
  • Protein Engineering / methods*
  • Protein Folding*
  • Protein Structure, Secondary
  • Sequence Analysis, Protein / methods

Substances

  • Peptide Fragments