Evolutionary approach for improved proton pumping activity of heterologous rhodopsin expressed in Escherichia coli.
Engineering
Error-prone PCR
Escherichia coli
Proton pumping
Rhodopsin
Screening
Journal
Journal of bioscience and bioengineering
ISSN: 1347-4421
Titre abrégé: J Biosci Bioeng
Pays: Japan
ID NLM: 100888800
Informations de publication
Date de publication:
Dec 2022
Dec 2022
Historique:
received:
31
05
2022
revised:
29
07
2022
accepted:
17
08
2022
pubmed:
29
9
2022
medline:
15
12
2022
entrez:
28
9
2022
Statut:
ppublish
Résumé
A light-driven ATP regeneration system using rhodopsin has been utilized as a method to improve the production of useful substances by microorganisms. To enable the industrial use of this system, the proton pumping rate of rhodopsin needs to be enhanced. Nonetheless, a method for this enhancement has not been established. In this study, we attempted to develop an evolutionary engineering method to improve the proton-pumping activity of rhodopsins. We first introduced random mutations into delta-rhodopsin (dR) from Haloterrigena turkmenica using error-prone PCR to generate approximately 7000 Escherichia coli strains carrying the mutant dR genes. Rhodopsin-expressing E. coli with enhanced proton pumping activity have significantly increased survival rates in prolonged saline water. Considering this, we enriched the mutant E. coli cells with higher proton pumping rates by selecting populations able to survive starvation under 50 μmol m
Identifiants
pubmed: 36171161
pii: S1389-1723(22)00231-6
doi: 10.1016/j.jbiosc.2022.08.006
pii:
doi:
Substances chimiques
Rhodopsin
9009-81-8
Protons
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
484-490Informations de copyright
Copyright © 2022 The Society for Biotechnology, Japan. Published by Elsevier B.V. All rights reserved.