Glycoconjugate Journal

, Volume 33, Issue 5, pp 809–818 | Cite as

Multivalent sialylation of β-thio-glycoclusters by Trypanosoma cruzi trans sialidase and analysis by high performance anion exchange chromatography

  • Rosalía AgustíEmail author
  • María Emilia Cano
  • Alejandro J. Cagnoni
  • José Kovensky
  • Rosa M. de Lederkremer
  • María Laura UhrigEmail author
Original Article


The synthesis of multivalent sialylated glycoclusters is herein addressed by a chemoenzymatic approach using the trans-sialidase of Trypanosoma cruzi (TcTS). Multivalent β-thio-galactopyranosides and β-thio-lactosides were used as acceptor substrates and 3′-sialyllactose as the sialic acid donor. High performance anion exchange chromatography with pulsed amperometric detection (HPAEC-PAD) was shown to be an excellent technique for the analysis of the reaction products. Different eluting conditions were optimized to allow the simultaneous resolution of the sialylated species, as well as their neutral precursors. The TcTS efficiently transferred sialyl residues to di, tri, tetra and octa β-thiogalactosides. In the case of an octavalent thiolactoside, up to six polysialylated compounds could be resolved. Preparative sialylation reactions were performed using the tetravalent and octavalent acceptor substrates. The main sialylated derivatives could be unequivocally assigned by MALDI mass spectrometry. Inhibition of the transfer to the natural substrate, N-acetyllactosamine, was also studied. The octalactoside caused 82 % inhibition of sialic acid transfer when we used equimolar concentrations of donor, acceptor and inhibitor.


T. cruzi trans-sialidase β-galactopyranosides Multivalent glycoclusters Sialic acid HPAEC MALDI-TOF Enzymatic sialylation 



We thank O. Campetella and his group from Universidad Nacional General San Martín (UNSAM) Argentina, for the kind gift of trans-sialidase from T. cruzi, and the personal of CEQUIBIEM (CONICET-UBA) for the MALDI experiments. Support for this work from the National Agency for Promotion of Science and Technology, ANPCyT, the National Research Council CONICET and the University of Buenos Aires is gratefully acknowledged. María E. Cano is a fellow from CONICET. Rosalía Agustí, María Laura Uhrig and Rosa M. de Lederkremer are research members of CONICET.

Supplementary material

10719_2016_9676_MOESM1_ESM.pdf (491 kb)
ESM 1 (PDF 491 kb)


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Rosalía Agustí
    • 1
    Email author
  • María Emilia Cano
    • 1
  • Alejandro J. Cagnoni
    • 1
  • José Kovensky
    • 2
  • Rosa M. de Lederkremer
    • 1
  • María Laura Uhrig
    • 1
    Email author
  1. 1.CIHIDECAR-CONICET, Departamento de Química Orgánica, Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina
  2. 2.Laboratoire de Glycochimie, des Antimicrobiens et des Agroressources (LG2A)-CNRS UMR 7478Université de Picardie Jules VerneAmiens CedexFrance

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