Cyclobutane-containing peptides: evaluation as novel metallocarboxypeptidase inhibitors and modelling of their mode of action.
Different types of cyclobutane-containing peptides (CBPs) were screened for the first time as ligands of metallocarboxypeptidases (MCPs). CBPs are conformationally constrained, low molecular-weight compounds which showed moderate yet selective inhibitory activity against mammalian MCPs. The most potent compound was a carboxypeptidase B inhibitor. Docked protein-ligand complexes indicated that CBPs may bind to the target proteases via electrostatic interactions and aromatic stacking to catalytically crucial residues and that the placement of functional groups seems to be assisted by the rigid CBP backbone. The easily obtainable CBPs may offer a valuable alternative in the design of novel inhibitors to disease-linked metallocarboxypeptidases like human plasma carboxypeptidase B.
Departament de Bioquímica i Biologia Molecular, Facultat de Biociències, and Institut de Biotecnologia i de Biomedicina, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain.
Daniel
D
Fernández
Elisabeth
E
Torres
Francesc X
FX
Avilés
Rosa M
RM
Ortuño
Josep
J
Vendrell
D002268:Carboxypeptidases / Q000037:antagonists & inhibitors / Q000737:chemistry* / Q000235:genetics; D003503:Cyclobutanes / Q000737:chemistry / Q000494:pharmacology; D004789:Enzyme Activation / Q000187:drug effects*; D004791:Enzyme Inhibitors / Q000737:chemistry / Q000494:pharmacology; D006801:Humans; D008954:Models, Biological; D015394:Molecular Structure; D010455:Peptides / Q000737:chemistry / Q000494:pharmacology; D011994:Recombinant Proteins / Q000235:genetics
D003503:Cyclobutanes; D004791:Enzyme Inhibitors; D010455:Peptides; D011994:Recombinant Proteins; D002268:Carboxypeptidases