Related Experiment Video

Updated: Jun 21, 2026

Host Cell Protein Analysis using Enrichment Beads Coupled with Limited Digestion
09:45

Host Cell Protein Analysis using Enrichment Beads Coupled with Limited Digestion

Published on: January 19, 2024

Identification of proteins from tuberculin purified protein derivative (PPD) by LC-MS/MS

Sibele Borsuk1, Jane Newcombe, Tom A Mendum

  • 1Centro de Biotecnologia, Universidade Federal de Pelotas, Pelotas, RS, Brazil.

Tuberculosis (Edinburgh, Scotland)
|August 18, 2009
PubMed

Insights

This study used proteomics to analyze tuberculin purified protein derivative (PPD), a key tuberculosis diagnostic. Researchers identified 171 proteins, revealing differences between bovine and avian PPD for improved tuberculosis diagnostics.

Area of Science:

  • Proteomics
  • Immunology
  • Microbiology

Background:

  • Tuberculin purified protein derivative (PPD) is a crucial diagnostic antigen for tuberculosis.
  • The exact composition of PPD is poorly defined due to protein denaturation during preparation.
  • Previous efforts to identify PPD constituents and their roles in immune responses have been challenging.

Purpose of the Study:

  • To characterize the protein components of tuberculin purified protein derivative (PPD) from various sources using a proteomics approach.
  • To identify specific proteins within PPD that could serve as improved diagnostic reagents for tuberculosis.
  • To compare the protein profiles of bovine and avian PPD preparations.

Main Methods:

  • Liquid chromatography-tandem mass spectrometry (LC-MS/MS) was employed for proteomics-based characterization.
  • This technique combines high-performance liquid chromatography (HPLC) for separation with mass spectrometry for detection.
  • Analysis was performed on four PPD samples from different sources (bovine and avian).

Main Results:

  • A total of 171 distinct proteins were identified across the analyzed PPD samples.
  • The majority of identified proteins were cytoplasmic, with significant involvement in metabolism and respiration, and a notable presence of lipid metabolism proteins.
  • A subset of 21 proteins was found in bovine PPD but absent in avian PPD, and four proteins in bovine PPD were not detected in Mycobacterium bovis BCG.

Conclusions:

  • This proteomics-based characterization provides a comprehensive understanding of tuberculin PPD composition.
  • The study identified specific protein differences between PPD types and potential novel antigens.
  • These findings can lead to the development of more accurate and specific diagnostic reagents for tuberculosis detection.

More Related Videos

Profiling Ubiquitin and Ubiquitin-like Dependent Post-translational Modifications and Identification of Significant Alterations10:26

Profiling Ubiquitin and Ubiquitin-like Dependent Post-translational Modifications and Identification of Significant Alterations

Published on: November 7, 2019

A Protocol for the Identification of Protein-protein Interactions Based on 15N Metabolic Labeling, Immunoprecipitation, Quantitative Mass Spectrometry and Affinity Modulation14:44

A Protocol for the Identification of Protein-protein Interactions Based on 15N Metabolic Labeling, Immunoprecipitation, Quantitative Mass Spectrometry and Affinity Modulation

Published on: September 24, 2012

Related Concept Videos

Peptide Identification Using Tandem Mass Spectrometry01:33

Peptide Identification Using Tandem Mass Spectrometry

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.
This technique helps gather information regarding the protein from which the peptide was obtained and to study the peptides’ amino acid sequence. Identifying peptides from a complex mixture is an important component of the growing field of...
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...