对L-DOPA感知和生产的定向进化使得扩展的遗传密码能够有效地被纳入蛋白质中
Andrew R Gilmour1, Qiyao Wei2, Chad Wang3
1Systems, Synthetic, and Physical Biology, Rice University, Houston, TX.
bioRxiv : the preprint server for biology
|July 16, 2025
概括
研究人员设计了一种生物传感器,用于生产3,4-二基氨 (L-DOPA). 这一进步使用定向进化显著改善了L-DOPA的产量,影响了蛋白质工程和制药化合物合成.
科学领域:
- 生物化学 生物化学
- 合成生物学 合成生物学
- 代谢工程是代谢工程.
背景情况:
- 3,4-二基氨 (L-DOPA) 是蛋白质修饰和遗传密码扩展的关键氨基酸.
- 目前生产L-DOPA及其代谢途径的方法需要大幅优化.
- 对L-DOPA的兴趣扩展到它在合成有价值的药物化合物的作用.
研究的目的:
- 为L-DOPA设计一种新的生物传感器.
- 通过定向进化优化L-DOPA的生产.
- 为了增强L-DOPA在蛋白质中的转化整合.
主要方法:
- 设计一个LysR家族转录因子 (PP_2251) 作为L-DOPA生物传感器.
- 使用分隔式伙伴复制 (CPR),一种基于乳液PCR的定向进化技术.
- 优化大肠杆菌的黄素依赖单氧酶 (HpaB) 以提高L-DOPA生物合成.
主要成果:
- 开发了一个功能性的L-DOPA生物传感器 (PP_2251).
- 通过CPR优化的HpaB.实现了超过250mg/L的L-DOPA生产产量的显著改善.
- 证明了L-DOPA在蛋白质中的高效翻译合并,效率为80%.
结论:
- 设计的生物传感器和心肺复苏器使得L-DOPA生产的大量优化成为可能.
- 增强的L-DOPA生物合成对蛋白质工程和遗传密码扩展具有广泛的影响.
- 这项工作促进了DOPA衍生的天然产品的生产,包括神经递质和类化合物等药品.
更多相关视频
14:02Optimizing the Genetic Incorporation of Chemical Probes into GPCRs for Photo-crosslinking Mapping and Bioorthogonal Chemistry in Live Mammalian Cells
Published on: April 9, 2018
8.6K
11:08A Facile Protocol to Generate Site-Specifically Acetylated Proteins in Escherichia Coli
Published on: December 9, 2017
7.1K
相关概念视频
From DNA to Protein
19.1K
The flow of genetic information in cells from DNA to mRNA to protein is described by the central dogma, which states that genes specify the sequence of mRNAs, which in turn specify the sequence of amino acids making up all proteins. The decoding of one molecule to another is performed by specific proteins and RNAs. Because the information stored in DNA is so central to cellular function, it makes intuitive sense that the cell would make mRNA copies of this information for protein synthesis...
19.1K
The Central Dogma
28.4K
The central dogma explains the flow of genetic information from DNA nucleotides to the amino acid sequence of proteins.
RNA is the Missing Link Between DNA and Proteins
In the early 1900s, scientists discovered that DNA stores all the information needed for cellular functions and that proteins perform most of these functions. However, the mechanisms of converting genetic information into functional proteins remained unknown for many years. Initially, it was believed that a single gene is...
RNA is the Missing Link Between DNA and Proteins
In the early 1900s, scientists discovered that DNA stores all the information needed for cellular functions and that proteins perform most of these functions. However, the mechanisms of converting genetic information into functional proteins remained unknown for many years. Initially, it was believed that a single gene is...
28.4K
Gene Duplication and Divergence
6.3K
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are...
6.3K
Proteins: From Genes to Degradation
12.8K
Within a biological system, the DNA encodes the RNA, and the nucleotide sequence in the RNA further defines the amino acid sequence in the protein. This is referred to as “The Central Dogma of Molecular Biology” - a term coined by Francis Crick. Central dogma is a firm principle in biology that defines the flow of genetic information within any life form. The two fundamental steps in central dogma are - transcription and translation.
Transcription is the synthesis of RNA...
Transcription is the synthesis of RNA...
12.8K
tRNA Activation
20.0K
Aminoacyl-tRNA synthetases are present in both eukaryotes and bacteria. Though eukaryotes have 20 different aminoacyl-tRNA synthetases to couple to 20 amino acids, many bacteria do not have genes for all of these aminoacyl-tRNA synthetases. Despite this, they still use all 20 amino acids to synthesize their proteins. For instance, some bacteria do not have the gene encoding the enzyme that couples glutamine with its partner tRNA. In these organisms, one enzyme adds glutamic acid to all of the...
20.0K
Leaky Scanning
5.2K
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R...
5.2K
