Skip to main content
Log in

C-Mannosylation: A Modification on Tryptophan in Cellular Proteins

  • Living reference work entry
  • First Online:

Abstract

C-Mannosylation is a unique glycosylation in which an α-mannose attaches to the indole C2 carbon atom of a tryptophan (Trp) residue to produce C-mannosyl-tryptophan. C-Mannosylation usually occurs at the first Trp in the consensus amino acid sequence Trp-x-x-Trp (W-x-x-W) in proteins through an enzymatic reaction with a specific mannosyltransferase. Recently, Caenorhabditis elegans DPY-19 was identified as a C-mannosyltransferase. Most substrates for C-mannosylation are part of either the thrombospondin type-1 repeat (TSR) superfamily or the type I cytokine receptor family, suggesting a functional role for C-mannosylation in specific substrate proteins. Although the functions of C-mannosylation have not been fully clarified, site-directed mutagenesis of the C-mannosylation potential site in the W-x-x-W motif has revealed it to be important in the folding or targeting of substrate proteins, such as mucins and ADAMTS-like 1, in the cell. By using chemically synthesized C-mannosylated TSR-derived peptides, it was revealed that C-mannosylated peptides could modulate lipopolysaccharide-induced cellular signaling to produce tumor necrosis factor-α. These accumulated findings indicate that C-mannosylation plays important roles in modulating the functions of acceptor proteins in the cell.

This is a preview of subscription content, log in via an institution to check access.

Similar content being viewed by others

Discover the latest articles, books and news in related subjects, suggested using machine learning.

References

Download references

Author information

Authors and Affiliations

  1. Department of Biochemistry, Wakayama Medical University School of Medicine, 811-1 Kimiidera, Wakayama, 641-8509, Japan

    Yoshito Ihara, Yoko Inai, Midori Ikezaki & In-Sook L. Matsui

  2. Synthetic Cellular Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan

    Shino Manabe & Yukishige Ito

  3. ERATO, Japan Science and Technology Agency (JST), Ito Glycotrilogy Project, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan

    Yukishige Ito

Authors
  1. Yoshito Ihara
  2. Yoko Inai
  3. Midori Ikezaki
  4. In-Sook L. Matsui
  5. Shino Manabe
  6. Yukishige Ito

Corresponding author

Correspondence to Yoshito Ihara .

Editor information

Editors and Affiliations

  1. Tokyo Metropolitan Institute of Gerontology, Tokyo Metropolitan Geriatric Hospital, Tokyo, Japan

    Tamao Endo

  2. Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces, Potsdam, Germany

    Peter H. Seeberger

  3. Dept. Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA

    Gerald W. Hart

  4. Academia Sinica, Nankang, Taipei, Taiwan

    Chi-Huey Wong

  5. Systems Glycobiology Group, RIKEN-Max Planck Joint Research Center for Systems Chemical Biology, Wako, Saitama, Japan

    Naoyuki Taniguchi

About this entry

Cite this entry

Ihara, Y., Inai, Y., Ikezaki, M., Matsui, IS.L., Manabe, S., Ito, Y. (2014). C-Mannosylation: A Modification on Tryptophan in Cellular Proteins. In: Endo, T., Seeberger, P., Hart, G., Wong, CH., Taniguchi, N. (eds) Glycoscience: Biology and Medicine. Springer, Tokyo. https://doi.org/10.1007/978-4-431-54836-2_67-1

Download citation

  • DOI: https://doi.org/10.1007/978-4-431-54836-2_67-1

  • Received:

  • Accepted:

  • Published:

  • Publisher Name: Springer, Tokyo

  • Online ISBN: 978-4-431-54836-2

  • eBook Packages: Living Reference Biomedicine and Life SciencesReference Module Biomedical and Life Sciences

Keywords

Publish with us

AltStyle によって変換されたページ (->オリジナル) /