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Efficient Heterologous Production of Rhizopus oryzae Lipase via Optimization of Multiple Expression-Related Helper Proteins

This study is dedicated to efficiently produce Rhizopus oryzae lipase (ROL) by optimizing the expression of multiple expression-related helper proteins in Pichia pastoris. A series of engineered strains harboring different copy numbers of the ROL gene and different copies of the chaperone Pdi gene w...

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Autores principales: Jiao, Liangcheng, Zhou, Qinghua, Su, Zhixin, Yan, Yunjun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6274836/
https://www.ncbi.nlm.nih.gov/pubmed/30373304
http://dx.doi.org/10.3390/ijms19113372
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author Jiao, Liangcheng
Zhou, Qinghua
Su, Zhixin
Yan, Yunjun
author_facet Jiao, Liangcheng
Zhou, Qinghua
Su, Zhixin
Yan, Yunjun
author_sort Jiao, Liangcheng
collection PubMed
description This study is dedicated to efficiently produce Rhizopus oryzae lipase (ROL) by optimizing the expression of multiple expression-related helper proteins in Pichia pastoris. A series of engineered strains harboring different copy numbers of the ROL gene and different copies of the chaperone Pdi gene were first constructed to examine the influence of Pdi gene copy number on ROL production. The results showed that multiple copies of Pdi gene did not significantly improve ROL expression. Then, the effect of the co-overexpression of 10 expression-related helper proteins on ROL secretion was investigated by screening 20 colonies of each transformants. The data from shaking-flask fermentation suggested that Ssa4, Bmh2, Sso2, Pdi, Bip, Hac1, and VHb had positive effects on ROL expression. Subsequently, Ssa4, Bmh2, and Sso2, which all participate in vesicular trafficking and strongly promote ROL expression, were combined to further improve ROL production level. ROL activity of the screened strain GS115/5ROL-Ssa4-Sso2-Bmh2 4# attained 5230 U/mL. Furthermore, when the helper proteins Pdi, Bip, Hac1, and VHb were individually co-expressed with ROL in the strain GS115/5ROL-Ssa4-Sso2-Bmh2 4#, lipase activity increased to 5650 U/mL in the strain GS115/5ROL-Ssa4-Sso2-Bmh2-VHb 9#. Additionally, the maximum ROL activity of 41,700 U/mL was achieved in a 3 L bioreactor for high-density fermentation via a sorbitol–methanol co-feeding strategy, reaching almost twofold the value of the initial strain GS115/pAOα-5ROL 11#. Thus, the strategies in this study significantly increased ROL expression level, which is of great potential for the large-scale production of ROL in P. pastoris.
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spelling pubmed-62748362018-12-15 Efficient Heterologous Production of Rhizopus oryzae Lipase via Optimization of Multiple Expression-Related Helper Proteins Jiao, Liangcheng Zhou, Qinghua Su, Zhixin Yan, Yunjun Int J Mol Sci Article This study is dedicated to efficiently produce Rhizopus oryzae lipase (ROL) by optimizing the expression of multiple expression-related helper proteins in Pichia pastoris. A series of engineered strains harboring different copy numbers of the ROL gene and different copies of the chaperone Pdi gene were first constructed to examine the influence of Pdi gene copy number on ROL production. The results showed that multiple copies of Pdi gene did not significantly improve ROL expression. Then, the effect of the co-overexpression of 10 expression-related helper proteins on ROL secretion was investigated by screening 20 colonies of each transformants. The data from shaking-flask fermentation suggested that Ssa4, Bmh2, Sso2, Pdi, Bip, Hac1, and VHb had positive effects on ROL expression. Subsequently, Ssa4, Bmh2, and Sso2, which all participate in vesicular trafficking and strongly promote ROL expression, were combined to further improve ROL production level. ROL activity of the screened strain GS115/5ROL-Ssa4-Sso2-Bmh2 4# attained 5230 U/mL. Furthermore, when the helper proteins Pdi, Bip, Hac1, and VHb were individually co-expressed with ROL in the strain GS115/5ROL-Ssa4-Sso2-Bmh2 4#, lipase activity increased to 5650 U/mL in the strain GS115/5ROL-Ssa4-Sso2-Bmh2-VHb 9#. Additionally, the maximum ROL activity of 41,700 U/mL was achieved in a 3 L bioreactor for high-density fermentation via a sorbitol–methanol co-feeding strategy, reaching almost twofold the value of the initial strain GS115/pAOα-5ROL 11#. Thus, the strategies in this study significantly increased ROL expression level, which is of great potential for the large-scale production of ROL in P. pastoris. MDPI 2018-10-28 /pmc/articles/PMC6274836/ /pubmed/30373304 http://dx.doi.org/10.3390/ijms19113372 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Jiao, Liangcheng
Zhou, Qinghua
Su, Zhixin
Yan, Yunjun
Efficient Heterologous Production of Rhizopus oryzae Lipase via Optimization of Multiple Expression-Related Helper Proteins
title Efficient Heterologous Production of Rhizopus oryzae Lipase via Optimization of Multiple Expression-Related Helper Proteins
title_full Efficient Heterologous Production of Rhizopus oryzae Lipase via Optimization of Multiple Expression-Related Helper Proteins
title_fullStr Efficient Heterologous Production of Rhizopus oryzae Lipase via Optimization of Multiple Expression-Related Helper Proteins
title_full_unstemmed Efficient Heterologous Production of Rhizopus oryzae Lipase via Optimization of Multiple Expression-Related Helper Proteins
title_short Efficient Heterologous Production of Rhizopus oryzae Lipase via Optimization of Multiple Expression-Related Helper Proteins
title_sort efficient heterologous production of rhizopus oryzae lipase via optimization of multiple expression-related helper proteins
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6274836/
https://www.ncbi.nlm.nih.gov/pubmed/30373304
http://dx.doi.org/10.3390/ijms19113372
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