Primary Citation of Related Structures: 1VZ2, 1VZ3
PubMed Abstract:
Prolyl oligopeptidase contains a peptidase domain and its catalytic triad is covered by the central tunnel of a seven-bladed beta-propeller. This domain makes the enzyme an oligopeptidase by excluding large structured peptides from the active site. The apparently rigid crystal structure does not explain how the substrate can approach the catalytic groups ...
Prolyl oligopeptidase contains a peptidase domain and its catalytic triad is covered by the central tunnel of a seven-bladed beta-propeller. This domain makes the enzyme an oligopeptidase by excluding large structured peptides from the active site. The apparently rigid crystal structure does not explain how the substrate can approach the catalytic groups. Two possibilities of substrate access were investigated: either blades 1 and 7 of the propeller domain move apart, or the peptidase and/or propeller domains move to create an entry site at the domain interface. Engineering disulfide bridges to the expected oscillating structures prevented such movements, which destroyed the catalytic activity and precluded substrate binding. This indicated that concerted movements of the propeller and the peptidase domains are essential for the enzyme action.
Related Citations:
Electrostatic Environment at the Active Site of Prolyl Oligopeptidase is Highly Influential During Substrate Binding Szeltner, Z., Rea, D., Renner, V., Juliano, L., Fulop, V., Polgar, L. (2003) J Biol Chem 278: 48786
Electrostatic Effects and Binding Determinants in the Catalysis of Prolyl Oligopeptidase: Site Specific Mutagenesis at the Oxyanion Binding Site Szeltner, Z., Rea, D., Renner, V., Fulop, V., Polgar, L. (2002) J Biol Chem 277: 42613
Substrate-Dependent Competency of the Catalytic Triad of Prolyl Oligopeptidase Szeltner, Z., Rea, D., Juhasz, T., Renner, V., Mucsi, Z., Orosz, G., Fulop, V., Polgar, L. (2002) J Biol Chem 277: 44597
Structures of Prolyl Oligopeptidase Substrate/ Inhibitor Complexes. Use of Inhibitor Binding for Titration of the Catalytic Histidine Residue Fulop, V., Szeltner, Z., Renner, V., Polgar, L. (2001) J Biol Chem 276: 1262
Catalysis of Serine Oligopeptidases is Controlled by a Gating Filter Mechanism Fulop, V., Szeltner, Z., Polgar, L. (2000) EMBO Rep 1: 277
Prolyl Oligopeptidase: An Unusual Beta-Propeller Domain Regulates Proteolysis Fulop, V., Bocskei, Z., Polgar, L. (1998) Cell 94: 161
Organizational Affiliation:
Institute of Enzymology, Biological Research Center, Hungarian Academy of Sciences, H-1518 Budapest 112, P.O. Box 7, Hungary.
Download Mendeley
