Analysis of the 5' untranslated region (5'UTR) of the alcohol oxidase 1 (AOX1) gene in recombinant protein expression in Pichia pastoris
Document Type
Article
Publication Title
Gene
Department
Chemistry
ISSN
0378-1119
Volume
496
Issue
2
DOI
10.1016/j.gene.2012.01.006
First Page
118
Last Page
127
Publication Date
4-1-2012
Abstract
Pichia pastoris is a methylotrophic yeast that has been genetically engineered to express over one thousand heterologous proteins valued for industrial, pharmaceutical and basic research purposes. In most cases, the 5′ untranslated region (UTR) of the alcohol oxidase 1 (AOX1) gene is fused to the coding sequence of the recombinant gene for protein expression in this yeast. Because the effect of the AOX1 5′UTR on protein expression is not known, site-directed mutagenesis was performed in order to decrease or increase the length of this region. Both of these types of changes were shown to affect translational efficiency, not transcript stability. While increasing the length of the 5′UTR clearly decreased expression of a β-galactosidase reporter in a proportional manner, a deletion analysis demonstrated that the AOX1 5′UTR contains a complex mixture of both positive and negative cis-acting elements, suggesting that the construction of a synthetic 5′UTR optimized for a higher level of expression may be challenging.
Recommended Citation
Staley, C. A.,
Huang, A.,
Nattestad, M.,
Oshiro, K. T.,
Ray, L. E.,
Mulye, T.,
Li, Z. H.,
Le, T.,
Stephens, J. J.,
Gomez, S. R.,
Moy, A. D.,
Nguyen, J. C.,
Franz, A. H.,
Lin-Cereghino, J.,
&
Lin-Cereghino, G. P.
(2012).
Analysis of the 5' untranslated region (5'UTR) of the alcohol oxidase 1 (AOX1) gene in recombinant protein expression in Pichia pastoris.
Gene, 496(2), 118–127.
DOI: 10.1016/j.gene.2012.01.006
https://scholarlycommons.pacific.edu/cop-facarticles/113
