相关实验视频

Updated: Aug 6, 2026

GC-based Detection of Aldononitrile Acetate Derivatized Glucosamine and Muramic Acid for Microbial Residue Determination in Soil

GC-based Detection of Aldononitrile Acetate Derivatized Glucosamine and Muramic Acid for Microbial Residue Determination in Soil

Published on: May 19, 2012

葡萄糖胺-酸盐的多通道LC-MS/MS染色体的解卷:证据表明Staphylococcus aureus和Enterococcus faecium之间存在GlmS调控差异

Nitish R Mishra¹, Amar Deep Sharma¹, Shivani Gargvanshi¹

¹Division of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Missouri-Kansas City, Kansas City, MO, 64108, USA.

|January 8, 2024

概括

使用MS/MS数据和非阴性解卷实现了像葡萄糖胺-6酸盐 (GlcN-6P) 和葡萄糖胺-1-酸盐 (GlcN-1P) 这样的类似分子的分解. 这种方法揭示了康治疗MRSA的GlcN-6P增加,表明GlmS调节.

科学领域:

分析化学分析化学
生物化学生物化学
微生物学微生物学

背景情况:

同位体分析剂由于其相似的物理和化学性质,对染色学和质谱学分辨率构成重大挑战.
胺酸盐,如葡萄糖胺-6酸盐 (GlcN-6P) 和葡萄糖胺-1-酸盐 (GlcN-1P),是细菌细胞壁生物合成的关键中间体,但很难分离.
现有的分析方法很难分辨出这些极性和不保留的化合物.

研究的目的:

开发和验证一种新型的分析方法,用于分解异构性胺酸盐.
调查葡萄糖胺-6-酸盐 (GlcN-6P) 在抗甲素*黄金葡萄球菌* (MRSA) 对万科治疗的反应中的作用.
为了阐明MRSA中糖糖生物合成的调节,与菌素敏感性菌 (VSE) 和菌素耐药性菌 (VRE) 相比.

主要方法:

六胺酸盐 (GlcN-6P,GlcN-1P,GalN-1P) 的衍生与八酸无水化物.
确定C18列的染色学条件.
使用MS/MS碎片化模式和非负线性回归来解卷染色学上重叠的分析物.
开发的方法应用于MRSA,VSE和VRE的细菌提取物.

主要成果:

获得了衍生型GlcN-6P,GlcN-1P和GalN-1P的完整色谱分辨率.
非阴性解卷成功地解决了基于不同的MS/MS强度概况的共同排泄GlcN-1P和GalN-1P.
观察到GlcN-6P的显著增加3倍,在Vancomycin治疗的MRSA中,但在VSE或VRE中没有.
这表明GlcN-6P的合成酶GlmS的差异调节,作为对万科米辛的反应.

结论:

开发的MS/MS解卷法为解决复杂生物矩阵中的异构六胺-酸盐提供了强大的工具.
这些发现突出了一个特定的监管机制,涉及到GlmS在MRSA中对菌素的耐药性.
这项研究提供了对MRSA和VSE/VRE.之间独特的糖生物合成途径的见解.

关键词:

银光胺-1-酸盐是一种这就是GLMS的意义.葡萄糖胺-1-酸盐的使用葡萄糖胺-6-酸盐是一种这是LC-MS/MS.非负的解卷分解.类甘油可以

更多相关视频

A Tandem Liquid Chromatography–Mass Spectrometry-based Approach for Metabolite Analysis of Staphylococcus aureus

A Tandem Liquid Chromatography–Mass Spectrometry-based Approach for Metabolite Analysis of Staphylococcus aureus

Published on: March 28, 2017

Quantitative Analysis of the Cellular Lipidome of Saccharomyces Cerevisiae Using Liquid Chromatography Coupled with Tandem Mass Spectrometry

Quantitative Analysis of the Cellular Lipidome of Saccharomyces Cerevisiae Using Liquid Chromatography Coupled with Tandem Mass Spectrometry

Published on: March 8, 2020

相关概念视频

Differential Staining Technique

Differential Staining Technique

Differential staining is an essential microbiological technique that exploits variations in cell wall structures to classify and identify microorganisms. It facilitates the distinction of bacteria, aiding in diagnostic and research applications. Two of the most widely used differential staining methods are Gram staining and acid-fast staining, both of which rely on the chemical and structural differences in bacterial cell walls.Gram Staining TechniqueGram staining differentiates bacteria by...

Special Staining Techniques

Special Staining Techniques

Specialized staining techniques play a vital role in microbiology by enabling the visualization of specific bacterial structures that remain undetectable with standard microscopy methods. These techniques not only enhance the structural visualization of bacterial cells but also provide critical insights into their pathogenicity and classification. Additionally, they support diagnostic and research endeavors in microbiology by identifying key bacterial features.Capsule Staining for Virulence...