A Method to Predict Amino Acids at Proximity of Beta-Sheet Axes from Protein Sequences

• 作者: Antonin Guilloux Bernard Caudron Jean-Luc Jestin
• 来源期刊: 应用数学(英文)
• 学科: 医学
• 关键词: POLYPEPTIDE Chain Protein STRUCTURE Topology Beta-Strand Folding Amino Acid STRUCTURE Prediction
• 年，卷（期）: 2014,（1）
• 页码范围: 79-89
• 页数: 11页
• 分类号: R73

摘要

A general and elementary protein folding step was described in a previous article. Energy conservation during this folding step yielded an equation with remarkable solutions over the field of rational numbers. Sets of sequences optimized for folding were derived. In this work, a geometrical analysis of protein beta-sheet backbone structures allows the definition of positions of topological interest. They correspond to amino acids’ alpha carbons located on a unique axis crossing all beta-sheet’s strands or at proximity of this axis defined here. These positions of topological interest are shown to be highly correlated with the absence of sequences optimized for folding. Applications in protein structure prediction for the quality assessment of structural models are envisioned.