在自的条件下,用于调整基因表达的促进器库在Cupriavidus necator中
Wataru Kitagawa1,2, Kensuke Igarashi1, Ryo Nagasawa1
1Biomanufacturing Process Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Sapporo, Japan.
Frontiers in bioengineering and biotechnology
|July 21, 2025
概括
研究人员为Cupriavidus necator (C. necator) 开发了一套新的遗传工具,特别是促进剂,以增强自营条件下的生物制造. 这一突破使得二氧化碳 (CO2) 能够更有效地用于可持续的化学生产.
科学领域:
- 微生物生物技术 微生物生物技术
- 合成生物学 合成生物学
- 代谢工程是代谢工程.
背景情况:
- 虫 (C. necator) 是一个有前途的生物制造微生物,利用CO2和H2进行自营生长和化学生产.
- 现有的C. necator遗传工具在自营性条件下缺乏功能,限制了其生物制造潜力.
- 诱导性或构成性促进体的开发对于在自性条件下对C. necator精确的基因表达控制至关重要.
研究的目的:
- 在自营生长条件下,在C. necator中建立一个功能性的新型促进子库.
- 为了识别和表征在自发育过程中特异上调或构成性表达的促剂.
- 为了实现高效的基因工程,以增强基于二氧化碳的生物制造.
主要方法:
- 在异质和自身条件下对C. necator进行比较转录组分析.
- 从上调和构成性表达的基因/操作子中识别和分离促进子区域.
- 使用β-银酸酶活性试验开发促进体评估系统.
- 在新型促进体的控制下构建具有外源基因的工程C. necator菌株.
主要成果:
- 在C. necator.中鉴定了七种自身养特异性促进体和三种构成性促进体.
- 通过基于β-galactosidase的系统,成功验证了促进体活性.
- 通过定量RT-PCR在自营性条件下确认外源基因表达.
- 开发了第一个C. necator在无诱导体的自条件下功能性的第一个促进子库.
结论:
- 已建立的促销商库显著提高了C. necator在自营养条件下的基因工程能力.
- 这项工作为优化基于二氧化碳的生物制造工艺提供了必要的工具.
- 这些发现有助于开发更可持续,更有效的生物生产平台.
相关概念视频
01:58Prokaryotic Transcriptional Activators and Repressors
22.0K
The organization of prokaryotic genes in their genome is notably different from that of eukaryotes. Prokaryotic genes are organized, such that the genes for proteins involved in the same biochemical process or function are located together in groups. This group of genes, along with their regulatory elements, are collectively known as an operon. The functional genes in an operon are transcribed together to give a single strand of mRNA known as polycistronic mRNA.
Transcription of prokaryotic...
Transcription of prokaryotic...
22.0K
02:40The Eukaryotic Promoter Region
16.7K
The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences. The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...
16.7K
01:58Cell Specific Gene Expression
13.9K
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
13.9K
02:13Cooperative Binding of Transcription Regulators
6.6K
Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome. Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form...
6.6K