Glycoconjugate Journal

, Volume 11, Issue 4, pp 321–332

The monomeric and dimeric mannose-binding proteins from the Orchidaceae speciesListera ovata andEpipactis helleborine: sequence homologies and differences in biological activities

  • Els J. M. van Damme
  • Jan Balzarini
  • Koen Smeets
  • Fred van Leuven
  • Willy J. Peumans
Special Lectins Issue

DOI: 10.1007/BF00731205

Cite this article as:
van Damme, E.J.M., Balzarini, J., Smeets, K. et al. Glycoconjugate J (1994) 11: 321. doi:10.1007/BF00731205

Abstract

The Orchidaceae speciesListera ovata andEpipactis helleborine contain two types of mannose-binding proteins. Using a combination of affinity chromatography on mannose-Sepharose-4B and ion exchange chromatography on a Mono-S column eight different mannose-binding proteins were isolated from the leaves ofListera ovata. Whereas seven of these mannose-binding proteins have agglutination activity and occur as dimers composed of lectin subunits of 11–13 kDa, the eighth mannose-binding protein is a monomer of 14 kDa devoid of agglutination activity. Moreover, the monomeric mannose-binding protein does not react with an antiserum raised against the dimeric lectin and, in contrast to the lectins, is completely inactive when tested for antiretroviral activity against human immunodeficiency virus type 1 and type 2. Mannose-binding proteins with similar properties were also found in the leaves ofEpipactis helleborine. However, in contrast toListera only one lectin was found inEpipactis. Despite the obvious differences in molecular structure and biological activities molecular cloning of different mannose-binding proteins fromListera andEpipactis has shown that these proteins are related and some parts of the sequences show a high degree of sequence homology indicating that they have been conserved through evolution.

Keywords

cDNA cloningEpipactislectinListeramannose-binding

Abbreviations

EHMBP

Epipactis helleborine mannose-binding protein

LOMBP

Listera ovata mannose-binding protein

Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • Els J. M. van Damme
    • 1
  • Jan Balzarini
    • 2
  • Koen Smeets
    • 1
  • Fred van Leuven
    • 3
  • Willy J. Peumans
    • 1
  1. 1.Laboratory for Phytopathology and Plant ProtectionKatholieke Universiteit LeuvenLeuvenBelgium
  2. 2.Laboratory of Experimental ChemotherapyRega Institute for Medical ResearchLeuvenBelgium
  3. 3.Center for Human GeneticsKatholieke Universiteit LeuvenBelgium