相关实验视频
Updated: Jun 22, 2025

06:08
Biophysical Characterization of Flagellar Motor Functions
Published on: January 18, 2017
8.2K
一种鞭毛辅助蛋白质将化疗与表面感应联系起来
Rachel I Salemi1, Ana K Cruz1, David M Hershey1
1Department of Bacteriology, University of Wisconsin-Madison, Madison, WI 53706, USA.
bioRxiv : the preprint server for biology
|July 1, 2024
概括
细菌使用鞭毛感应来粘附于表面. 通过FssF蛋白或其他基因扰乱化学反应会增加细菌的粘附性,从而揭示了运动性和殖民化之间的联系.
科学领域:
- 微生物学 微生物学
- 细胞生物学 细胞生物学
- 细菌的粘附性 细菌的粘附性
背景情况:
- 细菌通过复杂的信号通路来殖民表面.
- 鞭毛表面传感对于激活殖民至关重要.
- 半月菌 (Caulobacter crescentus) 使用一种坚固的粘合剂来粘附表面.
研究的目的:
- 研究FssF蛋白在鞭毛表面感应和细菌粘附中的作用.
- 阐明鞭毛功能,化学反应和固体生产之间的关系.
- 确定表面传感网络如何调节粘附,以应对鞭毛干扰.
主要方法:
- 光标记和FssF蛋白的定位.
- 基因分析,包括基因删除和表观症实验.
- 机动性测定和化学反应干扰分析.
- 在超粘性背景中对关键表面感应基因 (pleD, motB, dgcB) 的研究.
主要成果:
- FssF定位在鞭毛体C环上,对于鞭毛体正确组合至关重要.
- 删除fssF导致严重的运动缺陷由于受损的化学反应.
- 化学反应的破坏,包括通过fssF删除,导致过度粘附.
- 旗状定位器子单元集成机械和化学信号来调节粘附.
结论:
- FssF是鞭毛体C环的关键组成部分,参与了表面传感.
- 化学反应中断是促进细菌过粘合的重要因素.
- 鞭毛状态器在整合信号以控制细菌粘附方面发挥着核心作用.
相关概念视频
Chemotaxis and Direction of Cell Migration
3.4K
Cells can detect chemical cues in their environment and reorganize the cytoskeleton to migrate toward them or away from them. This directional migration, called chemotaxis, is essential during embryogenesis and development, immune response, tissue repair and regeneration, and reproduction. These chemical cues can either attract or repel the cell's movement. For example, axon development is determined by a combination of chemoattractants and chemorepellents that direct the growing axon...
3.4K
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
Actin Polymerization and Cell Motility
5.2K
Actin is a family of globular proteins that are highly abundant in eukaryotic cells. It makes up approximately 1-5% of total cell protein concentration. Actin monomers polymerize to form a complex network of polarized filaments, the actin cytoskeleton, that plays a crucial role in many cellular processes, including cell motility, division, endocytosis, and metastasis of cancer cells.
Actin cytoskeleton dynamics can produce pushing, pulling, and resistance forces that help the cell to migrate....
Actin cytoskeleton dynamics can produce pushing, pulling, and resistance forces that help the cell to migrate....
5.2K
Microtubules in Cell Motility
3.2K
Microtubules are thick hollow cylindrical proteins that help form the cytoskeleton. Microtubules have varied roles in the cell. These filaments help form cellular appendages like cilia and flagella, which are responsible for locomotion. The cilia arise from basal bodies, separated from the main body by a membrane-like structure forming the transition zone. This zone is the gate for the entry of lipids and proteins, creating a unique composition of lipids and proteins in the ciliary membrane and...
3.2K
Cytoskeletal Accessory Proteins
3.0K
The cytoskeleton is an essential cell component that plays several structural and functional roles. However, the filaments that make up the cytoskeleton cannot function independently and depend on the accessory or ancillary proteins to effectively carry out their function. Accessory proteins associate with cytoskeletal filaments and their monomers, aiding filament formation and function. They also help in the cross-communication among cytoskeletal filaments. Cytoskeletal accessory proteins are...
3.0K
Mechanism of Lamellipodia Formation
2.5K
Cells migrating in response to external stimuli form lamellipodia, which are thin membrane protrusions supported by a mesh of linked, branched, or unbranched actin filaments. These actin filaments interact with myosin motor proteins, creating the dynamic actomyosin complex within the cytoskeleton. Contractility, or the ability to generate contractile stress, is inherent to the actomyosin complex. It helps cells detect the stiffness of the surrounding ECM and exert contractile force for...
2.5K

