Fluorogenic D-amino acids enable real-time monitoring of peptidoglycan biosynthesis and high-throughput transpeptidation assays.
Nat Chem
; 11(4): 335-341, 2019 04.
Article
en En
| MEDLINE
| ID: mdl-30804500
ABSTRACT
Peptidoglycan is an essential cell wall component that maintains the morphology and viability of nearly all bacteria. Its biosynthesis requires periplasmic transpeptidation reactions, which construct peptide crosslinkages between polysaccharide chains to endow mechanical strength. However, tracking the transpeptidation reaction in vivo and in vitro is challenging, mainly due to the lack of efficient, biocompatible probes. Here, we report the design, synthesis and application of rotor-fluorogenic D-amino acids (RfDAAs), enabling real-time, continuous tracking of transpeptidation reactions. These probes allow peptidoglycan biosynthesis to be monitored in real time by visualizing transpeptidase reactions in live cells, as well as real-time activity assays of D,D- and L,D-transpeptidases and sortases in vitro. The unique ability of RfDAAs to become fluorescent when incorporated into peptidoglycan provides a powerful new tool to study peptidoglycan biosynthesis with high temporal resolution and prospectively enable high-throughput screening for inhibitors of peptidoglycan biosynthesis.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Proteínas Bacterianas
/
Peptidoglicano
/
Peptidil Transferasas
/
Aminoácidos
Idioma:
En
Revista:
Nat Chem
Asunto de la revista:
QUIMICA
Año:
2019
Tipo del documento:
Article
País de afiliación:
Estados Unidos