Welcome to Non-Natural Residue Module for Beginners

It provides an easy alternative to incorporate non-natural modifications in the peptide. A user only needs to enter the peptide sequence, his/her email address and select either Forcefield_NCAA or SwissSideChain library of non-natural amino acids. After submission, a user friendly interface in the tabular form is displayed in which each amino acid of the input peptide sequence is present in one column and a drop down menu of all possible non-natural amino acids occur in the next column. For more information click help

Peptide Sequence Submission Form

Peptide sequence in plain text format          

Swiss Side-Chain

If you are using PEPstrMOD, please cite the following articles:
i) Singh, S., Singh, H., Tuknait, A., Chaudhary, K., Singh, B., Kumaran, S. and Raghava, G.P.S. (2015) PEPstrMOD: structure prediction of peptides containing natural, non-natural and modified residues. Biology Direct 10:73.
ii) Kaur, H., Garg, A. and Raghava, G.P.S. (2007) PEPstr: A de novo method for tertiary structure prediction of small bioactive peptides. Protein Pept Lett. 14:626-30.
Click Here for PEPstrMOD Manual