Bacillus subtilis矩阵蛋白TasA是界面活性,但BslA主导了界面膜特性
Ryan J Morris1,2, Natalie C Bamford2,3, Keith M Bromley1
1School of Physics & Astronomy, University of Edinburgh, Peter Guthrie Tait Road, Edinburgh EH9 3FD, U.K.
Langmuir : the ACS journal of surfaces and colloids
|February 14, 2024
概括
这项研究揭示了TasaA蛋白与BSLA一样具有表面活性,可以在Bacillus subtilis生物膜中形成界面膜. 塔萨与BSLA竞争,但BSLA却是他们的竞争对手.
科学领域:
- 微生物学 微生物学
- 生物化学 生物化学
- 材料科学 材料科学 材料科学
背景情况:
- 生物膜是微生物群落,包裹在一个保护性的细胞外基质中.
- 细菌细菌利用分泌的蛋白质BslA和TasaA进行生物膜矩阵的形成.
- 在生物膜表面上,BSLA形成了弹性,防水的膜.
研究的目的:
- 为了研究Tasa的界面特性.
- 为了确定TasaA对BSLA界面膜形成的影响.
- 阐明BSLA在生物膜中稳定膜形成背后的机制.
主要方法:
- 通过乳液稳定和薄膜形成,评估了Tasa的界面活动.
- 通过二次结构分析分析了TasaA的界面诱导的结构变化.
- 进行混合蛋白悬挂滴试验,研究BslA-TasA相互作用.
主要成果:
- TasA表现出界面活动,形成非弹性膜,在压力下放松.
- 在界面占用方面,TasA与BSLA竞争,这可能会阻碍BSLA薄膜的形成.
- 在接口上,BSLA表现出弹性,在压力下驱逐竞争分子.
结论:
- 塔萨具有接口特性,可以影响BSLA的膜形成能力.
- BslA形成稳定,疏水生物膜矩阵的能力取决于它对竞争的表面活性分子的弹性.
- 一个拟议的模型通过压力诱导的结构重组和侧面相互作用来解释BSLA在接口上的优势.
更多相关视频
08:29Au-Interaction of Slp1 Polymers and Monolayer from Lysinibacillus sphaericus JG-B53 - QCM-D, ICP-MS and AFM as Tools for Biomolecule-metal Studies
Published on: January 19, 2016
11.4K
10:17Methodologies for Studying B. subtilis Biofilms as a Model for Characterizing Small Molecule Biofilm Inhibitors
Published on: October 9, 2016
15.2K
相关概念视频
Protein Diffusion in the Membrane
Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
Laminins are the Adhesive Proteins of Basal Lamina
Laminins are heterotrimeric proteins with high molecular mass found in the extracellular matrix. Each laminin molecule is composed of three chains, viz. alpha, beta, and gamma, coded by five, four, and three paralogous genes, respectively. Laminins are categories based on the compositions of the three chains.
In humans, the five forms of alpha chains are LAMA 1, LAMA 2, LAMA 3, LAMA 4, and LAMA 5. The four forms of beta chains are LAMB 1, LAMB 2, LAMB 3, and LAMB 4. The three forms of gamma...
In humans, the five forms of alpha chains are LAMA 1, LAMA 2, LAMA 3, LAMA 4, and LAMA 5. The four forms of beta chains are LAMB 1, LAMB 2, LAMB 3, and LAMB 4. The three forms of gamma...
Biofilms
Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
Bacterial Translocation and Protein Secretion
Bacterial protein secretion involves translocation systems to ensure proteins reach their designated locations, including the plasma membrane, periplasm, outer membrane, or the external environment. These translocation systems are vital for bacterial physiology, supporting processes like membrane assembly, enzymatic activity in the periplasm, and interactions with the external environment. The division of labor between Sec and Tat pathways ensures efficiency in handling proteins with diverse...
