Primary Citation of Related Structures:   1E5T
PubMed Abstract: 
Proteases have a variety of strategies for selecting substrates in order to prevent uncontrolled protein degradation. A recent crystal structure determination of prolyl oligopeptidase has suggested a way for substrate selection involving an unclosed seven-bladed beta-propeller domain ...
Proteases have a variety of strategies for selecting substrates in order to prevent uncontrolled protein degradation. A recent crystal structure determination of prolyl oligopeptidase has suggested a way for substrate selection involving an unclosed seven-bladed beta-propeller domain. We have engineered a disulfide bond between the first and seventh blades of the propeller, which resulted in the loss of enzymatic activity. These results provided direct evidence for a novel strategy of regulation in which oscillating propeller blades act as a gating filter during catalysis, letting small peptide substrates into the active site while excluding large proteins to prevent accidental proteolysis.
Related Citations: 
Prolyl Oligopeptidase: An Unusual Beta-Propeller Domain Regulates Proteolysis Fulop, V., Bocskei, Z., Polgar, L. (1998) Cell 94: 161
Organizational Affiliation: 
Department of Biological Sciences, University of Warwick, Coventry, UK.
Version 1.1: 2011-08-31 Changes: Data collection, Derived calculations, Non-polymer description, Other, Source and taxonomy, Structure summary, Version format compliance
Version 1.2: 2019-07-24 Changes: Data collection, Derived calculations