Computational design of a protein-based enzyme inhibitor.

TitleComputational design of a protein-based enzyme inhibitor.
Publication TypeJournal Article
Year of Publication2013
AuthorsProcko, E., Hedman R., Hamilton K., Seetharaman J., Fleishman S. J., Su M., Aramini J., Kornhaber G., Hunt J. F., Tong L., Montelione G. T., & Baker D.
JournalJournal of molecular biology
Volume425
Issue18
Pagination3563-75
Date Published2013 Sep 23
ISSN1089-8638
KeywordsAmino Acid Sequence, Animals, Catalytic Domain, Computational Biology, Enzyme Inhibitors, Models, Molecular, Molecular Docking Simulation, Muramidase, Mutagenesis, Site-Directed, Primary Publication, Protein Binding, Protein Conformation, Protein Engineering, Protein Interaction Domains and Motifs, Protein Interaction Maps
Abstract

While there has been considerable progress in designing protein-protein interactions, the design of proteins that bind polar surfaces is an unmet challenge. We describe the computational design of a protein that binds the acidic active site of hen egg lysozyme and inhibits the enzyme. The design process starts with two polar amino acids that fit deep into the enzyme active site, identifies a protein scaffold that supports these residues and is complementary in shape to the lysozyme active-site region, and finally optimizes the surrounding contact surface for high-affinity binding. Following affinity maturation, a protein designed using this method bound lysozyme with low nanomolar affinity, and a combination of NMR studies, crystallography, and knockout mutagenesis confirmed the designed binding surface and orientation. Saturation mutagenesis with selection and deep sequencing demonstrated that specific designed interactions extending well beyond the centrally grafted polar residues are critical for high-affinity binding.

DOI10.1016/j.jmb.2013.06.035
Custom1

http://www.ncbi.nlm.nih.gov/pubmed/23827138?dopt=Abstract

Alternate JournalJ. Mol. Biol.
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Procko13.pdf2.98 MB