Acta Phys. -Chim. Sin. ›› 2004, Vol. 20 ›› Issue (05): 498-502.doi: 10.3866/PKU.WHXB20040511

• ARTICLE • Previous Articles     Next Articles

Prediction of Protein Structural Classes Based on Correlations of Amino Acid Residues

Wang Shu-Qing;Liu Hong;Du Qi-Shi;Wei Dong-Qing   

  1. Institute of Bioinformatics and Drug Discovery, Tianjin Normal University, Tianjin 300074;Department of Physics, Liaoning University, Shenyang 110036
  • Received:2003-10-17 Revised:2004-01-02 Published:2004-05-15
  • Contact: Du Qi-Shi

Abstract: The correlation relationships among amino acid residues in protein structures are studied. Some residue pairs have larger correlation coefficients and they are not independent of protein structural classes. The correlation relationships of amino acid residues are the earmarks of protein structural classes and have special physical and chemical causes. These correlation relationships are used in the predictions of protein structures for α,β,α/β, and α+β protein classes, in total 204 proteins. The prediction accuracy are 94% (α-proteins),89% (β-proteins),79% ((α/β)-proteins) and 89% ((α+β)-proteins),higher than the results of the simple distance method and the Euclidean distance method.

Key words: Correlation of amino acids, Prediction of protein structure,  Bioinformatics