Abstract
Trypanosoma cruzi trans-sialidase (TcTS) has intrigued researchers all over the world since it was shown that T. cruzi incorporates sialic acid through a mechanism independent of sialyltransferases. The enzyme has being involved in a vast myriad of functions in the biology of the parasite and in the pathology of Chagas’ disease. At the structural level experiments trapping the intermediate with fluorosugars followed by peptide mapping, X-ray crystallography, molecular modeling and magnetic nuclear resonance have opened up a three-dimensional understanding of the way this enzyme works. Herein we review the multiple biological roles of TcTS and the structural studies that are slowly revealing the secrets underlining an efficient sugar transfer activity rather than simple hydrolysis by TcTS.
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Abbreviations
- 4-MUNeu5Ac:
-
4-methylumbelliferyl-N-acetyl neuraminic acid
- Galf :
-
Galactofuranose
- Galp :
-
Galactopyranose
- GlcNAc:
-
N-acetylglucosamine
- Neu5Ac:
-
N-acetylneuraminic
- Neu5Gc:
-
N-glycolylneuraminic acid
- NGF:
-
Nerve growth factor receptor
- pNPNeu5Ac:
-
p-nitrophenyl-N-acetyl-neuraminic acid
- SAPA:
-
Shed acute phase antigen
- Sias:
-
Sialic acids
- Siglecs:
-
Sia-binding Ig-like lectin
- TcTS:
-
Trypanosoma cruzi trans-sialidase
- TSs:
-
Trans-sialidase family
- UTR:
-
Untranslated regions
References
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Acknowledgments
The study was financially supported by Conselho Nacional de Desenvolvimento e Tecnologia (CNPq) Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior and the National Institute for Science and Technology in Vaccines (CNPq 573547/2008-4).
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Oliveira, I.A., Freire-de-Lima, L., Penha, L.L., Dias, W.B., Todeschini, A.R. (2014). Trypanosoma cruzi Trans-Sialidase: Structural Features and Biological Implications. In: Santos, A., Branquinha, M., d’Avila-Levy, C., Kneipp, L., Sodré, C. (eds) Proteins and Proteomics of Leishmania and Trypanosoma. Subcellular Biochemistry, vol 74. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-7305-9_8
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