Analysis of amino acid distances in protein chains

Abstract

Interactions of amino acids within protein chains were analyzed based on geometric distances between every two amino acids in the same chain. For each pair of amino acids in a chain, three types of distances were calculated: a distance between Cα atoms of amino acids, a minimal and a maximal distance without taking into account hydrogen atoms. Using different criteria based on distance threshold and properties of proteins and amino acids, different groups of amino acid distances were analyzed. For each pair of amino acids in each analyzed group, descriptive statistics were calculated. The obtained results can be viewed at http://bioinfo.matf.bg.ac.rs/aadis/statistics.html