Article (Scientific journals)
Downregulation by organic nitrogen of AOX1 promoter used for controlled expression of foreign genes in the yeast Pichia pastoris
Velastegui, E.; Theron, C.; Berrios, J. et al.
2019In Yeast, 36 (5), p. 297-304
Peer Reviewed verified by ORBi
 

Files


Full Text
Yeast_2019a.pdf
Publisher postprint (412.08 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
AOX1 promoter regulation; P. pastoris; AOX1 gene; Article; Candida antarctica; Komagataella pastoris; Pichia; Amino Acids; Down-Regulation; Fermentation; Gene Expression Regulation, Fungal; Green Fluorescent Proteins; Lipase; Methanol; Nitrogen; Oxidoreductases; Promoter Regions, Genetic; Recombinant Proteins
Abstract :
[en] Pichia pastoris is a well-established cell factory for recombinant protein synthesis. Various optimization strategies of processes based on AOX1 promoter have been investigated, including methanol co-feeding with glycerol or sorbitol during the induction stage. Compared with carbon sources, comparatively little research has been devoted to the effects of nitrogen sources. Several reports have described the benefits of adding casamino acids (CA) to the recombinant protein production medium, however, without considering its effects at the gene expression level. Using enhanced green fluorescent protein as a reporter protein, monitored using flow cytometry, CA was shown to downregulate AOX1 promoter induction. Despite higher growth rates, cultures containing CA exhibited slower transition to the induced state, whereas metabolite analysis revealed that methanol consumption was reduced in the presence of CA compared with its absence. The repressive effect of CA was further confirmed by analysing the synthesis of extracellular recombinant Candida antarctica lipase under control of the AOX1 promoter. These findings highlight nitrogen source selection as an important consideration for AOX1-based protein production. © 2019 John Wiley & Sons, Ltd.
Disciplines :
Biotechnology
Author, co-author :
Velastegui, E.;  Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
Theron, C.;  Microbial Processes and Interactions, TERRA Teaching and Research Centre, Gembloux Agro Bio Tech, University of Liege, Gembloux, Belgium
Berrios, J.;  Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
Fickers, Patrick ;  Université de Liège - ULiège > Département GxABT > Microbial, food and biobased technologies
Title :
Downregulation by organic nitrogen of AOX1 promoter used for controlled expression of foreign genes in the yeast Pichia pastoris
Publication date :
2019
Journal title :
Yeast
ISSN :
0749-503X
eISSN :
1097-0061
Publisher :
John Wiley and Sons Ltd
Volume :
36
Issue :
5
Pages :
297-304
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
CONICYT - Comisión Nacional de Investigación Científica y Tecnológica [CL]
Available on ORBi :
since 18 February 2021

Statistics


Number of views
58 (4 by ULiège)
Number of downloads
2 (2 by ULiège)

Scopus citations®
 
9
Scopus citations®
without self-citations
4
OpenCitations
 
5

Bibliography


Similar publications



Contact ORBi