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- W2320367064 abstract "Human cell lines are often different in their features and present variations in the glycosylation patterns of cell membrane proteins. Protein glycosylation is the most common posttranslational modification and plays a particular role in functionality and bioactivity. The key approach of this study is the comparative analysis of five hematopoietic cell lines for their N-glycosylation pattern. The N-glycans of membrane proteins were elucidated by matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF-MS) and MALDI-TOF/TOF-MS analyses. Furthermore, the expression of a set of glycosyltransferases was determined via RT-PCR. The B-lymphoma BJA-B and promyelocytic HL-60 cell lines distinguish in levels and linkages of glycan-bound sialic acids. Furthermore, subclones of BJA-B and HL-60 cells, which completely lack UDP-N-acetylglucosamine 2-epimerase/N-acetylmannosamine kinase (GNE), the key enzyme of sialic acid biosynthesis, contained almost no sialylated N-glycans. Compared to wild-type cells, the GNE-deficient cells presented a similar cell surface N-glycosylation pattern in terms of antennarity and fucosylation. The Jurkat T-cell line revealed only partially sialylated N-glycans. Additionally, the different hematopoietic cell lines vary in their level of bisecting GlcNAcylation and antennary fucosylation with the quantities of bisecting N-acetylglucosamine (GlcNAc) and core fucose coinciding with the expression of GnT-III and FucT-VIII. Of note is the occurrence of N-acetyllactosamine (LacNAc) extensions on tetraantennary structures in GNE-deficient cell lines." @default.
- W2320367064 created "2016-06-24" @default.
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- W2320367064 date "2012-08-01" @default.
- W2320367064 modified "2023-10-09" @default.
- W2320367064 title "The analysis of N-glycans of cell membrane proteins from human hematopoietic cell lines reveals distinctions in their pattern" @default.
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- W2320367064 doi "https://doi.org/10.1515/hsz-2012-0195" @default.
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