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Related Experiment Videos

Metabolite antigens and pathway incompatibility.

Wataru Honda1, Shuichi Kawashima, Minoru Kanehisa

  • 1Bioinformatics Center, Institute for Chemical Research, Kyoto University, Gokasho Uji, Kyoto 611-0011, Japan. honda@kuicr.kyoto-u.ac.jp

Genome Informatics. International Conference on Genome Informatics
|May 16, 2007
PubMed
Summary

Vgamma9Vdelta2 T-cells recognize diverse microbial compounds. This study reveals these antigens are often pathogen-specific or involve non-human enzymes, distinguishing them from human pathways.

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Area of Science:

  • Immunology
  • Microbiology
  • Biochemistry

Background:

  • Vgamma9Vdelta2 T-cells are a major subset of human gammadelta T-cells, recognizing non-peptide antigens like phosphoantigens and alkylamines.
  • These recognized compounds are produced by various organisms, with phosphoantigens previously linked to pathogen pathways for isopentenyl pyrophosphate (IPP).

Purpose of the Study:

  • To investigate the origin and biosynthetic pathways of non-peptide antigens recognized by Vgamma9Vdelta2 T-cells.
  • To determine if these antigens are exclusively microbial or also found in human metabolic pathways.

Main Methods:

  • Comparative analysis of microbial and human biosynthetic pathways.
  • Structural analysis of Vgamma9Vdelta2 T-cell recognized compounds, including phosphoantigens and alkylamines.

Main Results:

  • Identified Vgamma9Vdelta2 T-cell recognized compounds on pathogen-specific biosynthetic pathways that lead to molecules shared with humans.
  • Discovered compounds structurally similar to alkylamine antigens that are exclusively found in pathogen pathways or produced by non-human enzymes.

Conclusions:

  • Vgamma9Vdelta2 T-cell recognition extends beyond previously known phosphoantigens to include other microbial metabolites.
  • The presence of these unique microbial compounds and enzymes provides a basis for Vgamma9Vdelta2 T-cell mediated immunity against pathogens.