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MALDI-TOF Mass Spectrometry01:19

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Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.
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Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
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Mass spectrometry is an analytical technique used to determine the molecular mass and molecular formula of a compound. The basic principle of mass spectrometry is to generate ions from the analyte molecule and measure these ion abundances against their molecular mass.  One common type of ionization, known as electrospray ionization or EI, bombards the analyte molecules in the gas phase with high-energy electron beams. The electron beams displace an electron from the molecule and leave...
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Related Experiment Video

Updated: Jul 19, 2025

Untargeted Metabolomics from Biological Sources Using Ultraperformance Liquid Chromatography-High Resolution Mass Spectrometry UPLC-HRMS
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A Taxonomically-informed Mass Spectrometry Search Tool for Microbial Metabolomics Data.

Simone Zuffa1,2, Robin Schmid1,2, Anelize Bauermeister1,2,3

  • 1Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, 9500 Gilman Dr., San Diego, CA, 92093, United States.

Research Square
|August 14, 2023
PubMed
Summary

MicrobeMASST enhances microbial metabolite identification using mass spectrometry (MS) and a large microbial database. This tool links metabolite spectra to specific microbes, improving ecological and health insights.

Keywords:
bacteriafungimetabolomicsmicrobiomesearch tool

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Area of Science:

  • Microbiology
  • Metabolomics
  • Bioinformatics

Background:

  • Untargeted metabolomics experiments often face challenges in annotating microbial metabolites.
  • Accurate identification of microbial metabolites and their producers is crucial for understanding microbial roles in ecology and human health.

Approach:

  • MicrobeMASST is a novel, taxonomically-informed mass spectrometry (MS) search tool.
  • It utilizes a curated database of over 60,000 microbial monocultures.
  • Users can search MS/MS spectra against this database to link metabolites to their microbial origins via fragmentation patterns.

Key Points:

  • Enables identification of known and unknown microbial metabolites.
  • Links identified metabolites to their specific microbial producers without prior knowledge.
  • Leverages MS/MS fragmentation patterns for accurate metabolite-producer associations.

Conclusions:

  • MicrobeMASST significantly advances microbial metabolite annotation in untargeted metabolomics.
  • Facilitates a deeper understanding of microorganisms' contributions to ecological processes and human health.
  • Provides a powerful tool for researchers in microbiology, metabolomics, and related fields.