Self-assembling small molecules form nanofibrils that bind procaspase-3 to promote activation.
J Am Chem Soc
; 133(49): 19630-3, 2011 Dec 14.
Article
em En
| MEDLINE
| ID: mdl-22066605
ABSTRACT
Modulating enzyme function with small-molecule activators, as opposed to inhibitors, offers new opportunities for drug discovery and allosteric regulation. We previously identified a compound, called 1541, from a high-throughput screen (HTS) that stimulates activation of a proenzyme, procaspase-3, to generate mature caspase-3. Here we further investigate the mechanism of activation and report the surprising finding that 1541 self-assembles into nanofibrils exceeding 1 µm in length. These particles are an unanticipated outcome from an HTS that have properties distinct from standard globular protein aggregators. Moreover, 1541 nanofibrils function as a unique biocatalytic material that activates procaspase-3 via induced proximity. These studies demonstrate a novel approach for proenzyme activation through binding to fibrils, which may mimic how procaspases are naturally processed on protein scaffolds.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Ativação Enzimática
/
Precursores Enzimáticos
/
Caspase 3
/
Bibliotecas de Moléculas Pequenas
/
Nanofibras
Tipo de estudo:
Prognostic_studies
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article