相关实验视频
Updated: Jun 22, 2025

12:04
FtsZ Polymerization Assays: Simple Protocols and Considerations
Published on: November 16, 2013
15.2K
纤维化和抑制 prokaryotic CTP 合成酶与连接物
Chenjun Guo1, Zixuan Wang1, Ji-Long Liu1,2,3
1School of Life Science and Technology ShanghaiTech University Shanghai China.
mLife
|July 1, 2024
概括
丁三酸盐合成酶 (CTPS) 对于DNA和RNA合成至关重要. 这项研究揭示了其在大肠杆菌中的独特结构和结合,为开发新型抗菌药物提供了洞察力.
科学领域:
- 生物化学和结构生物学
- 分子微生物学 分子微生物学
- 药物发现 药物发现 药物发现
背景情况:
- 丁三酸盐合成酶 (CTPS) 对于CTP的新合成至关重要,CTP是RNA和DNA的重要核酸.
- CTPS表现出复杂的调节,包括丝形成,是对病原体的潜在治疗目标.
- 了解 prokaryotic CTPS 结构是开发向抑制剂的关键.
研究的目的:
- 为了确定大肠杆菌CTPS (ecCTPS) 丝的高分辨率结构.
- 研究ecCTPS与CTP,NADH和抑制剂DON的结合相互作用.
- 探索CTPS线索形成的进化基础,并确定潜在的药物点.
主要方法:
- 使用冷电子显微镜 (cryo-EM) 来确定ecCTPS光线的2.9 Å分辨率结构.
- 对线索形成界面进行了基因分析.
- 使用了计算分析,生化分析和比较结构分析.
主要成果:
- 阐明了ecCTPS光纤与CTP,NADH和DON复合的结构.
- 与真核生物同类相比,在ecCTPS中发现了一种独特的CTP结合模式.
- 证实了CTP与NADH或腺因对CTPS的协同抑制.
- 在DON结合时,一个溶剂可访问的氨道被揭示出来.
结论:
- 这项研究提供了关于大肠杆菌*CTPS丝形成和调节的详细结构理解.
- 这些发现揭示了ecCTPS CTP结合和协同抑制机制的独特方面.
- 这项研究为设计针对 prokaryotic CTPS 的特定抑制剂为治疗应用奠定了基础.
相关概念视频
Cytoskeletal Proteins in Bacteria
3.4K
Bacterial cells were initially considered simple, randomly organized structures lacking a cytoskeleton. However, the discovery of cytoskeleton homologs in bacteria led to the change of this opinion. Bacterial cytoskeletal filaments regulate the cell shape, cell polarity, cell division, and partitioning of plasmids during cell division. It was later discovered that bacterial cytoskeletal proteins, mainly actin and tubulin homologs, are diverse compared to their eukaryotic counterparts. On the...
3.4K
Assembly of Cytoskeletal Filaments
19.2K
Cytoskeletal filaments are polymeric forms of smaller protein subunits. However, individual cytoskeletal filaments may easily disassemble or associate with other similar filaments to form rigid structures. Microfilaments, made of actin monomers, rely on actin-binding proteins to form bundles and create networks of individual actin filaments. Microtubules rely on microtubule-associated proteins (MAPs) to form sturdy cylindrical structures. However, the proteins involved in forming complex...
19.2K
Actin Filament Depolymerization
3.1K
Actin filaments (F-actin) are composed of actin subunits. The dissociation of actin monomers can occur from either end of F-actin. The rate of dissociation is faster from the minus-end or the pointed end, where the actin subunits exist with a bound ADP, together known as ADP-actin. The depolymerization of F-actin is aided by proteins, including the actin-depolymerizing factor (ADF) and cofilin family of proteins, gelsolin, and glia maturation factor (GMF).
In F-actin, the ADF/cofilin proteins...
In F-actin, the ADF/cofilin proteins...
3.1K
Mechanism of Filopodia Formation
2.3K
Filopodia are thin, actin-rich cellular protrusions that play an important role in many fundamental cellular functions. They vary in their occurrence, length, and positioning in different cell types, suggesting their diverse roles.
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
Their main function is to guide migrating cells during normal tissue morphogenesis or cancer metastasis by recognizing and making initial contacts with the extracellular matrix. However, they can also act as stationary cell anchors or help to establish communication...
2.3K
Generation of Straight or Branched Actin Filaments
2.9K
The straight or branched structure formation of actin filaments is controlled by nucleating proteins such as the formins and Arp2/3 complex. Formin-mediated assembly results in straight filaments, whereas Arp2/3 protein complex-mediated assembly results in branched actin filaments.
Arp2/3 Complex
Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...
Arp2/3 Complex
Arp2/3 complex is a seven-subunit complex consisting of two proteins similar to actin- Arp2 and Arp3, and five other subunits that help keep Arp2 and Arp3 inactive. When required, the complex is...
2.9K
Transcription Attenuation in Prokaryotes
15.2K
Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin structure. Bacteria use these hairpins to regulate the transcription process and control the synthesis of several amino acids including histidine, lysine, threonine, and phenylalanine. Transcription attenuation takes place in the non-coding regions of mRNA.
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
15.2K

