Abstract
Protein function depends on interaction with their ligands and mannose is one of the important ligands for understanding glycoprotein, so it is often required to calculate the binding site residues in protein at different distance threshold from PDB file. To study particular protein chain and its interaction with mannose in complex form, researchers have to parse the output of different available tools or databases for binding-site residues. Here we have developed a tool for calculating amino acid contact distances in proteins at different distance threshold using PDB file. ContMann can quickly find all binding-site residues in the protein by calculating distances from its coordinate present in pdb file by selecting the different distance threshold, Additionally, it can also generate atomic details of contacts including distances of binding-site residue. ContMann tool is available at: http://procarb. org/procarbdb/cfind-contact2.html