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Protein & Peptide Letters

Editor-in-Chief

ISSN (Print): 0929-8665
ISSN (Online): 1875-5305

The Role of Scaffolding in Standard Mechanism Serine Proteinase Inhibitors

Author(s): Clyde A. Kelly, Michael Laskowski Jr. and M. A. Qasim

Volume 12, Issue 5, 2005

Page: [465 - 471] Pages: 7

DOI: 10.2174/0929866054395383

Price: $65

Abstract

In single domain, “standard mechanism” protein inhibitors of serine proteinases, about a dozen residues make contact with the cognate enzyme. The remainder of the molecule, the scaffolding, holds the reactive site region of the inhibitor in a canonical conformation, improves the binding by about six orders of magnitude and protects it from proteolysis. However, the stability and global structure of the scaffolding is irrelevant to inhibition, provided that inhibition is measured much below the melting temperature,™.

Keywords: standard mechanism inhibitors, scaffolding, serine proteinases, inhibitor stability


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