Design of fully synthetic signal peptide library and its use for enhanced secretory production of recombinant proteins in Corynebacterium glutamicum.
Corynebacterium glutamicum
Library screening
Sec-dependent pathway
Secretion
Synthetic signal peptide
Journal
Microbial cell factories
ISSN: 1475-2859
Titre abrégé: Microb Cell Fact
Pays: England
ID NLM: 101139812
Informations de publication
Date de publication:
16 Sep 2024
16 Sep 2024
Historique:
received:
13
05
2024
accepted:
28
08
2024
medline:
17
9
2024
pubmed:
17
9
2024
entrez:
16
9
2024
Statut:
epublish
Résumé
Corynebacterium glutamicum is an attractive host for secretory production of recombinant proteins, including high-value industrial enzymes and therapeutic proteins. The choice of an appropriate signaling peptide is crucial for efficient protein secretion. However, due to the limited availability of signal peptides in C. glutamicum, establishing an optimal secretion system is challenging. We constructed a signal peptide library for the isolation of target-specific signal peptides and developed a highly efficient secretory production system in C. glutamicum. Based on the sequence information of the signal peptides of the general secretion-dependent pathway in C. glutamicum, a synthetic signal peptide library was designed, and validated with three protein models. First, we examined endoxylanase (XynA) and one potential signal peptide (C1) was successfully isolated by library screening on xylan-containing agar plates. With this C1 signal peptide, secretory production of XynA as high as 3.2 g/L could be achieved with high purity (> 80%). Next, the signal peptide for ⍺-amylase (AmyA) was screened on a starch-containing agar plate. The production titer of the isolated signal peptide (HS06) reached 1.48 g/L which was 2-fold higher than that of the well-known Cg1514 signal peptide. Finally, we isolated the signal peptide for the M18 single-chain variable fragment (scFv). As an enzyme-independent screening tool, we developed a fluorescence-dependent screening tool using Fluorescence-Activating and Absorption-Shifting Tag (FAST) fusion, and successfully isolated the optimal signal peptide (18F11) for M18 scFv. With 18F11, secretory production as high as 228 mg/L was achieved, which was 3.4-fold higher than previous results. By screening a fully synthetic signal peptide library, we achieved improved production of target proteins compared to previous results using well-known signal peptides. Our synthetic library provides a useful resource for the development of an optimal secretion system for various recombinant proteins in C. glutamicum, and we believe this bacterium to be a more promising workhorse for the bioindustry.
Sections du résumé
BACKGROUND
BACKGROUND
Corynebacterium glutamicum is an attractive host for secretory production of recombinant proteins, including high-value industrial enzymes and therapeutic proteins. The choice of an appropriate signaling peptide is crucial for efficient protein secretion. However, due to the limited availability of signal peptides in C. glutamicum, establishing an optimal secretion system is challenging.
RESULT
RESULTS
We constructed a signal peptide library for the isolation of target-specific signal peptides and developed a highly efficient secretory production system in C. glutamicum. Based on the sequence information of the signal peptides of the general secretion-dependent pathway in C. glutamicum, a synthetic signal peptide library was designed, and validated with three protein models. First, we examined endoxylanase (XynA) and one potential signal peptide (C1) was successfully isolated by library screening on xylan-containing agar plates. With this C1 signal peptide, secretory production of XynA as high as 3.2 g/L could be achieved with high purity (> 80%). Next, the signal peptide for ⍺-amylase (AmyA) was screened on a starch-containing agar plate. The production titer of the isolated signal peptide (HS06) reached 1.48 g/L which was 2-fold higher than that of the well-known Cg1514 signal peptide. Finally, we isolated the signal peptide for the M18 single-chain variable fragment (scFv). As an enzyme-independent screening tool, we developed a fluorescence-dependent screening tool using Fluorescence-Activating and Absorption-Shifting Tag (FAST) fusion, and successfully isolated the optimal signal peptide (18F11) for M18 scFv. With 18F11, secretory production as high as 228 mg/L was achieved, which was 3.4-fold higher than previous results.
CONCLUSIONS
CONCLUSIONS
By screening a fully synthetic signal peptide library, we achieved improved production of target proteins compared to previous results using well-known signal peptides. Our synthetic library provides a useful resource for the development of an optimal secretion system for various recombinant proteins in C. glutamicum, and we believe this bacterium to be a more promising workhorse for the bioindustry.
Identifiants
pubmed: 39285401
doi: 10.1186/s12934-024-02516-9
pii: 10.1186/s12934-024-02516-9
doi:
Substances chimiques
Protein Sorting Signals
0
Recombinant Proteins
0
Peptide Library
0
Endo-1,4-beta Xylanases
EC 3.2.1.8
Bacterial Proteins
0
alpha-Amylases
EC 3.2.1.1
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
252Subventions
Organisme : National Research Foundation of Korea
ID : NRF-2020R1A2C2012537
Organisme : Korea Institute of Planning and Evaluation for Technology in Food, Agriculture and Forestry
ID : 321109-04-1-HD020
Informations de copyright
© 2024. The Author(s).
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