当前位置： SCI文献检索 > WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY期刊下所有文献 > Construction of a series of episomal plasmids and their application in the development of an efficient CRISPR/Cas9 system in Pichia pastoris.

Construction of a series of episomal plasmids and their application in the development of an efficient CRISPR/Cas9 system in Pichia pastoris.

Abstract：

:The methylotrophic yeast Pichia pastoris is widely used in recombinant expression of eukaryotic proteins owing to the ability of post-translational modification, tightly regulated promoters, and high cell density fermentation. However, episomal plasmids for heterologous gene expression and the CRISPR/Cas9 system for genome editing have not been well developed in P. pastoris. In the present study, a panel of episomal plasmids containing various autonomously replicating sequences (ARSs) were constructed and their performance in transformation efficiency, copy numbers, and propagation stability were systematically compared. Among the five ARSs with different origins, panARS isolated from Kluyveromyces lactis was determined to have the best performance and used to develop an efficient CRISPR/Cas9 based genome editing system. Compared with a previously reported system using the endogenous and most commonly used ARS (PARS1), the CRISPR/Cas9 genome editing efficiency was increased for more than tenfold. Owing to the higher plasmid stability with panARS, efficient CRISPR/Cas9-mediated genome editing with a type III promoter (i.e. SER promoter) to drive the expression of the single guide RNA (sgRNA) was achieved for the first time. The constructed episomal plasmids and developed CRISPR/Cas9 system will be important synthetic biology tools for both fundamental studies and industrial applications of P. pastoris.

journal_name

World J Microbiol Biotechnol

journal_title

World journal of microbiology & biotechnology

authors

Gu Y,Gao J,Cao M,Dong C,Lian J,Huang L,Cai J,Xu Z

doi

10.1007/s11274-019-2654-5

subject

Has Abstract

pub_date

2019-05-27 00:00:00

pages

79

issue

6

eissn

0959-3993

issn

1573-0972

pii

10.1007/s11274-019-2654-5

journal_volume

35

pub_type

杂志文章

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