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[1]缪晡 苟敏 陈栋 汤岳琴**.不同糖发酵条件下酿酒酵母组成型启动子和诱导型启动子评价*[J].应用与环境生物学报,2020,26(03):1-10.[doi:10.19675/j.cnki.1006-687x.2019.07015]
　MIAO Pu,Gou Min,CHEN Dong,et al.Genome-wide evaluation of constitutive and regulated promoters in Saccharomyces cerevisiae in different carbon sources*[J].Chinese Journal of Applied & Environmental Biology,2020,26(03):1-10.[doi:10.19675/j.cnki.1006-687x.2019.07015]
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不同糖发酵条件下酿酒酵母组成型启动子和诱导型启动子评价*()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
26卷
期数:
2020年03期
页码:
1-10
栏目:
研究论文
出版日期:
2020-06-25

文章信息/Info

Title:
Genome-wide evaluation of constitutive and regulated promoters in Saccharomyces cerevisiae in different carbon sources*
作者:
缪晡1 苟敏2; 3 陈栋1 汤岳琴2; 3**
1中石化上海工程有限公司 上海 200120 2四川大学建筑与环境学院 成都 610065
3四川省环境保护有机废弃物资源化利用重点实验室 成都 610065
Author(s):
MIAO Pu1;  Gou Min2; 3;  CHEN Dong 1;  TANG Yueqin2; 3**
1 Sinopec Shanghai Engineering Co. Ltd., Shanghai 200120, China
2 Environmental Biotechnology Research Center, College of Architecture and Environment, Sichuan University, Chengdu 610065, China
3 Sichuan Environmental Protection Key Laboratory of Organic Waste Resource Utilization, Chengdu 610065, China
关键词:
启动子; 酿酒酵母; 转录组; 木糖利用
Keywords:
Promoter;  Saccharomyces cerevisiae;  Transcriptome;  Xylose utilization
DOI:
10.19675/j.cnki.1006-687x.2019.07015
摘要:
木糖是秸秆等纤维素类生物质原料中含量仅次于葡萄糖的第二丰富的糖，构建可高效发酵木糖的酿酒酵母菌株是提高原料利用率，降低纤维素燃料乙醇生产成本的基础。外源基因的高效表达以及本源基因的调控都需要选择表达强度合适的启动子。基于比较转录组，在全基因组水平上比较解析酿酒酵母所有基因在发酵葡萄糖、发酵木糖、发酵混合糖（葡萄糖和木糖）条件下的表达强度，拟为构建木糖利用菌株提供一系列备选的启动子库。结果表明，碳源种类对酿酒酵母启动子的强度有显著影响，绝大多数启动子强度受碳源影响显著，有67个启动子的强度在不同碳源条件下保持了相对稳定；启动子PTEF1和PTEF2、PADH1、PCCW12和某些核糖体蛋白基因启动子可在构建木糖利用菌株时作为组成型强启动子，另有中、弱强度的组成型启动子可用于基因表达优化；启动子PYNR071C、PPUT1、PDSF1等可作为利用木糖时的诱导型启动子，使基因在有需要的时候才进行表达。本研究在系统解析全基因组启动子强度和碳源种类的关系基础上，为构建利用不同碳源的酿酒酵母菌株提供了具有不同表达特征的候选启动子库。
Abstract:
Xylose is the second most abundant sugar in lignocellulosic biomass but not a natural carbon source for Saccharomyces cerevisiae. To increase the resource utilization efficiency and reduce the cost of bioethanol production, it is crucial to construct strains able to ferment xylose effectively. The efficient expression of exogenous genes and the regulation of native genes require the selection of promoters with appropriate expression strength. However, up to now, the researches on the strength , the stability, and the inducibility of promotors in S. cerevisiae when fermenting glucose, xylose or mixed sugar s is very limited. In this study, the promoter strength in an industrial xylose-utilizing strain in response to four carbon source conditions (glucose, xylose, and mixed sugar ) was evaluated genome-wide using transcriptome data. The results showed that the strength of most promoters changed in the different carbon sources other than the glucose fermentation state while 67 promotors kept the strength level under different sugar conditions. A series of promoter libraries for gene engineering were provided. PTEF1, PTEF2, PADH1, PCCW12, and some ribosomal protein promoters could serve as constitutive strong promoters for xylose-utilizing strain construction. Constitutive medium and weak promoters which could be provided for strain optimization were summarized. PYNR071C, PPUT1, and PDSF1 could be used as inducible promoters in the xylose fermentation state, driving high levels of gene expression only when necessary. The libraries of constitutive and inducible promoters with different strengths provided in this study is useful for gene engineering of xylose-utilizing S. cerevisiae strains

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备注/Memo

备注/Memo:
收稿日期 Received: 2019-07-10 接受日期 Accepted: 2019-08-30
**国家自然科学基金项目（31170093）资助
**通讯作者 Corresponding author (E-mail: tangyq@scu.edu.cn)
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更新日期/Last Update: 2019-09-04