Download MendeleyCrystal structure of NS-134 in complex with bovine cathepsin B: a two-headed epoxysuccinyl inhibitor extends along the entire active-site cleft.
Stern, I., Schaschke, N., Moroder, L., Turk, D.(2004) Biochem J 381: 511-517
- PubMed: 15084146
- DOI: https://doi.org/10.1042/BJ20040237
- Primary Citation of Related Structures:
1SP4 - PubMed Abstract:
The crystal structure of the inhibitor NS-134 in complex with bovine cathepsin B reveals that functional groups attached to both sides of the epoxysuccinyl reactive group bind to the part of active-site cleft as predicted. The -Leu-Pro-OH side binds to the primed binding sites interacting with the His110 and His111 residues with its C-terminal carboxy group, whereas the -Leu-Gly-Meu (-Leu-Gly-Gly-OMe) part (Meu, methoxycarbonylmethyl) binds along the non-primed binding sites. Comparison with the propeptide structures of cathepsins revealed that the binding of the latter part is least similar to the procathepsin B structure; this result, together with the two-residue shift in positioning of the Leu-Gly-Gly part, suggests that the propeptide structures of the cognate enzymes may not be the best starting point for the design of reverse binding inhibitors.
Organizational Affiliation:
Department of Biochemistry and Molecular Biology, Josef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
