Signal peptides for recombinant protein secretion in bacterial expression systems.
Microb Cell Fact
; 17(1): 52, 2018 Mar 29.
Article
en En
| MEDLINE
| ID: mdl-29598818
The secretion of biotechnologically or pharmaceutically relevant recombinant proteins into the culture supernatant of a bacterial expression host greatly facilitates their downstream processing and significantly reduces the production costs. The first step during the secretion of a desired target protein into the growth medium is its transport across the cytoplasmic membrane. In bacteria, two major export pathways, the general secretion or Sec pathway and the twin-arginine translocation or Tat pathway, exist for the transport of proteins across the plasma membrane. The routing into one of these alternative protein export systems requires the fusion of a Sec- or Tat-specific signal peptide to the amino-terminal end of the desired target protein. Since signal peptides, besides being required for the targeting to and membrane translocation by the respective protein translocases, also have additional influences on the biosynthesis, the folding kinetics, and the stability of the respective target proteins, it is not possible so far to predict in advance which signal peptide will perform best in the context of a given target protein and a given bacterial expression host. As outlined in this review, the most promising way to find the optimal signal peptide for a desired protein is to screen the largest possible diversity of signal peptides, either generated by signal peptide variation using large signal peptide libraries or, alternatively, by optimization of a given signal peptide using site-directed or random mutagenesis strategies.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Proteínas Bacterianas
/
Proteínas Recombinantes
/
Señales de Clasificación de Proteína
/
Sistemas de Secreción Bacterianos
Idioma:
En
Revista:
Microb Cell Fact
Asunto de la revista:
BIOTECNOLOGIA
/
MICROBIOLOGIA
Año:
2018
Tipo del documento:
Article
País de afiliación:
Alemania
Pais de publicación:
Reino Unido