Glycoconjugate
nucleotide sugar
transporter
trypanosomatids
Journal
Parasitology
ISSN: 1469-8161
Titre abrégé: Parasitology
Pays: England
ID NLM: 0401121
Informations de publication
Date de publication:
09 2019
09 2019
Historique:
pubmed:
14
6
2019
medline:
6
5
2020
entrez:
14
6
2019
Statut:
ppublish
Résumé
Survival and infectivity of trypanosomatids rely on cell-surface and secreted glycoconjugates, many of which contain a variable number of galactose residues. Incorporation of galactose to proteins and lipids occurs along the secretory pathway from UDP-galactose (UDP-Gal). Before being used in glycosylation reactions, however, this activated sugar donor must first be transported across the endoplasmic reticulum and Golgi membranes by a specific nucleotide sugar transporter (NST). In this study, we identified an UDP-Gal transporter (named TcNST2 and encoded by the TcCLB.504085.60 gene) from Trypanosoma cruzi, the etiological agent of Chagas disease. TcNST2 was identified by heterologous expression of selected putative nucleotide sugar transporters in a mutant Chinese Hamster Ovary cell line. TcNST2 mRNA levels were detected in all T. cruzi life-cycle forms, with an increase in expression in axenic amastigotes. Confocal microscope analysis indicated that the transporter is specifically localized to the Golgi apparatus. A three-dimensional model of TcNST2 suggested an overall structural conservation as compared with members of the metabolite transporter superfamily and also suggested specific features that could be related to its activity. The identification of this transporter is an important step toward a better understanding of glycoconjugate biosynthesis and the role NSTs play in this process in trypanosomatids.
Identifiants
pubmed: 31190664
pii: S0031182019000738
doi: 10.1017/S0031182019000738
doi:
Substances chimiques
Monosaccharide Transport Proteins
0
Protozoan Proteins
0
UDP-galactose translocator
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM