The Rational Design of Therapeutic Peptides for Aminopeptidase N using a Substrate-Based Approach

Shilvi Joshi, Lang Chen, Michael B. Winter, Yi Lun Lin, Yang Yang, Mariya Shapovalova, Paige M. Smith, Chang Liu, Fang Li, Aaron M. Lebeau

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16 Scopus citations


The M1 family of metalloproteases represents a large number of exopeptidases that cleave single amino acid residues from the N-terminus of peptide substrates. One member of this family that has been well studied is aminopeptidase N (APN), a multifunctional protease known to cleave biologically active peptides and aide in coronavirus entry. The proteolytic activity of APN promotes cancer angiogenesis and metastasis making it an important target for cancer therapy. To understand the substrate specificity of APN for the development of targeted inhibitors, we used a global substrate profiling method to determine the P1-P4′ amino acid preferences. The key structural features of the APN pharmacophore required for substrate recognition were elucidated by X-ray crystallography. By combining these substrate profiling and structural data, we were able to design a selective peptide inhibitor of APN that was an effective therapeutic both in vitro and in vivo against APN-expressing prostate cancer models.

Original languageEnglish (US)
Article number1424
JournalScientific reports
Issue number1
StatePublished - Dec 1 2017

Bibliographical note

Funding Information:
This work was supported by a Prostate Cancer Foundation Young Investigator Award (A.M.L.), a Randy Shaver Cancer Research and community Fund Award (A.M.L.) and the National Institutes of Health Grant R01AI089728 (to F.L.).

Publisher Copyright:
© 2017 The Author(s).

Copyright 2017 Elsevier B.V., All rights reserved.

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