Abstract
Endothiapepsin is a typical member of the aspartic proteinase family. The catalytic mechanism of this family is attributed to two conserved catalytic aspartate residues, which coordinate the hydrolysis of a peptide bond. An oligopeptide inhibitor (IC50 = 0.62 µM) based on a reduced-bond transition-state inhibitor of mucorpepsin was co-crystallized with endothiapepsin and the crystal structure of the enzyme-inhibitor complex was determined at 1.35 Å resolution. A total of 12 hydrogen bonds between the inhibitor and the active-site residues were identified. The resulting structure demonstrates a number of novel subsite interactions in the active-site cleft.
Original language | English |
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Pages (from-to) | 30-33 |
Journal | Acta Crystallographica Section F: Structural Biology Communications |
Volume | 70 |
Issue number | 1 |
Early online date | 24 Dec 2013 |
DOIs | |
Publication status | Published - 1 Jan 2014 |
Keywords
- endothiapepsin
- aspartic proteases
- transition state
- inhibitor