title: Diverse expression of N-acetylglucosaminyltransferase V and complex-type β1,6-branched N-glycans in uveal and cutaneous melanoma cells.
abstract: Although both uveal (UM) and cutaneous (CM) melanoma cells derive from the transformed melanocytes, their biology varies significantly in several aspects. Malignant transformation is frequently associated with alternations in cell glycosylation, in particular those concerning branched complex-type N-glycans. These changes occur principally in β1,4-N-acetylglucosaminyltransferase III (GnT-III) that catalyzes the synthesis of glycans with bisected N-acetylglucosamine (GlcNAc) and β1,6-N-acetylglucosaminyltransferase V (GnT-V) that is involved in forming β1,6-branched antenna in complex-type glycans. We searched for the reasons of a different behavior of CM and UM cells in the expression of GnT-III and GnT-V and their oligosaccharide products. Our study showed that UM cells have more β1,6-branched glycans than CM cells, what results from a higher expression of MGAT5 gene encoding GnT-V. The higher β1,6-branching of glycans in UM may contribute to their higher potential to migrate on fibronectin and weaker binding to main extracellular matrix proteins, observed in our previous studies.
authors.affiliation: Department of Glycoconjugate Biochemistry, Institute of Zoology, Jagiellonian University, Kraków, Poland.
authors.forename: Ewa
authors.initials: E
authors.lastname: Pocheć
authors.affiliation: Department of Glycoconjugate Biochemistry, Institute of Zoology, Jagiellonian University, Kraków, Poland.
authors.forename: Magdalena
authors.initials: M
authors.lastname: Rydlewska
authors.affiliation: Department of Glycoconjugate Biochemistry, Institute of Zoology, Jagiellonian University, Kraków, Poland.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Przybyło
authors.affiliation: Department of Glycoconjugate Biochemistry, Institute of Zoology, Jagiellonian University, Kraków, Poland.
authors.forename: Anna
authors.initials: A
authors.lastname: Lityńska
mesh_terms: D045744:Cell Line, Tumor; D002465:Cell Movement; D015972:Gene Expression Regulation, Neoplastic; D006031:Glycosylation; D006801:Humans; D008545:Melanoma / Q000235:genetics / Q000378:metabolism* / Q000473:pathology; D017351:N-Acetylglucosaminyltransferases / Q000235:genetics / Q000378:metabolism*; D011134:Polysaccharides / Q000737:chemistry / Q000378:metabolism; D012878:Skin Neoplasms / Q000235:genetics / Q000378:metabolism*; D014604:Uveal Neoplasms / Q000235:genetics / Q000378:metabolism* / Q000473:pathology
chemical_list: D011134:Polysaccharides; C000601122:Mgat5 protein, human; D017351:N-Acetylglucosaminyltransferases; C054599:beta-1,4-mannosyl-glycoprotein beta-1,4-N-acetylglucosaminyltransferase; C052254:alpha-1,6-mannosylglycoprotein beta 1,6-N-acetylglucosaminyltransferase