Evolution of a highly active and enantiospecific metalloenzyme from short peptides.
Science
; 362(6420): 1285-1288, 2018 12 14.
Article
em En
| MEDLINE
| ID: mdl-30545884
ABSTRACT
Primordial sequence signatures in modern proteins imply ancestral origins tracing back to simple peptides. Although short peptides seldom adopt unique folds, metal ions might have templated their assembly into higher-order structures in early evolution and imparted useful chemical reactivity. Recapitulating such a biogenetic scenario, we have combined design and laboratory evolution to transform a zinc-binding peptide into a globular enzyme capable of accelerating ester cleavage with exacting enantiospecificity and high catalytic efficiency (k cat/K M ~ 106 M-1 s-1). The simultaneous optimization of structure and function in a naïve peptide scaffold not only illustrates a plausible enzyme evolutionary pathway from the distant past to the present but also proffers exciting future opportunities for enzyme design and engineering.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Oligopeptídeos
/
Zinco
/
Enzimas
/
Metaloproteínas
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article