Related Experiment Video

Updated: Oct 3, 2026

Low Molecular Weight Protein Enrichment on Mesoporous Silica Thin Films for Biomarker Discovery
13:00

Low Molecular Weight Protein Enrichment on Mesoporous Silica Thin Films for Biomarker Discovery

Published on: April 17, 2012

Characterization of protein biomarkers desorbed by MALDI from whole fungal cells

B Amiri-Eliasi1, C Fenselau

  • 1Department of Chemistry and Biochemistry, University of Maryland, College Park 20742, USA. eliasi@wam.umd.edu

Analytical Chemistry
|November 28, 2001
PubMed

Insights

This study shows ultraviolet matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (UV-MALDI-TOF-MS) can rapidly identify fungi like Saccharomyces cerevisiae. High-concentration formic acid effectively lyses cell walls, enabling species differentiation via unique mass spectra.

Area of Science:

  • Microbiology
  • Analytical Chemistry
  • Biophysics

Background:

  • Saccharomyces cerevisiae is a key unicellular eukaryote model organism.
  • Rapid and accurate fungal identification is crucial in various scientific fields.
  • Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) offers potential for microbial analysis.

Purpose of the Study:

  • To report the application of UV-MALDI-TOF-MS for rapid identification and characterization of Saccharomyces cerevisiae.
  • To optimize cell lysis protocols for effective MALDI-MS analysis of fungi.
  • To demonstrate the utility of MALDI-MS for distinguishing between different fungal species.

Main Methods:

  • Utilized ultraviolet matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (UV-MALDI-TOF-MS).
  • Investigated and optimized cell wall lysis techniques using varying concentrations of formic acid solutions.
  • Analyzed mass spectra generated from different fungal species.

Main Results:

  • Determined that high concentrations of formic acid provide optimal cell lysis for MALDI-MS.
  • Demonstrated that distinct mass spectra are generated for different fungal species, allowing for ready differentiation.
  • Tentatively identified protein peaks in Saccharomyces cerevisiae spectra, primarily relating to ribosomal and mitochondrion-associated proteins, using bioinformatics.

Conclusions:

  • UV-MALDI-TOF-MS is an effective method for the rapid identification and characterization of Saccharomyces cerevisiae.
  • Formic acid concentration is a critical factor for successful cell lysis in fungal MALDI-MS.
  • MALDI-MS-based proteomic profiling can serve as a reliable tool for fungal species discrimination.

More Related Videos

Evaluation of Microbial Safety of Dairies using Bacterial Proteomic Profiling via MALDI Approach09:31

Evaluation of Microbial Safety of Dairies using Bacterial Proteomic Profiling via MALDI Approach

Published on: October 7, 2025

Small-Scale Plasma Membrane Preparation for the Analysis of Candida albicans Cdr1-mGFPHis09:44

Small-Scale Plasma Membrane Preparation for the Analysis of Candida albicans Cdr1-mGFPHis

Published on: June 13, 2021

Related Concept Videos

MALDI-TOF Mass Spectrometry01:19

MALDI-TOF Mass Spectrometry

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.Matrix-assisted laser desorption ionization (MALDI) is a commonly...
Rapid Identification of Pathogens01:25

Rapid Identification of Pathogens

MALDI-TOF MS has transformed clinical microbiology by offering a rapid and reliable method for pathogen identification. The traditional approach to microbial identification typically involves time-consuming culture techniques and biochemical tests, which can delay the initiation of appropriate antimicrobial therapy. MALDI-TOF MS avoids these delays by using characteristic ribosomal protein mass patterns of microbial cells, enabling accurate species-level identification within minutes.Principle...
Western Blotting01:15

Western Blotting

Western blotting is an analytical technique for protein identification. It has various applications in immunology and medicine, including detecting diseases like bovine spongiform encephalopathy, mad cow disease, and human and feline immunodeficiency virus from biological samples.
The technique begins with separating proteins from the sample using sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), followed by protein transfer, immunoblotting, and finally, protein detection.