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Genomics Meets Glycomics-The First GWAS Study of Human N-Glycome Identifies HNF1 alpha as a Master Regulator of Plasma Protein Fucosylation
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2010 (English)In: PLoS Genetics, ISSN 1553-7390, Vol. 6, no 12, e1001256- p.Article in journal (Refereed) Published
Abstract [en]

Over half of all proteins are glycosylated, and alterations in glycosylation have been observed in numerous physiological and pathological processes. Attached glycans significantly affect protein function; but, contrary to polypeptides, they are not directly encoded by genes, and the complex processes that regulate their assembly are poorly understood. A novel approach combining genome-wide association and high-throughput glycomics analysis of 2,705 individuals in three population cohorts showed that common variants in the Hepatocyte Nuclear Factor 1 alpha (HNF1 alpha) and fucosyltransferase genes FUT6 and FUT8 influence N-glycan levels in human plasma. We show that HNF1 alpha and its downstream target HNF4 alpha regulate the expression of key fucosyltransferase and fucose biosynthesis genes. Moreover, we show that HNF1 alpha is both necessary and sufficient to drive the expression of these genes in hepatic cells. These results reveal a new role for HNF1 alpha as a master transcriptional regulator of multiple stages in the fucosylation process. This mechanism has implications for the regulation of immunity, embryonic development, and protein folding, as well as for our understanding of the molecular mechanisms underlying cancer, coronary heart disease, and metabolic and inflammatory disorders.

Place, publisher, year, edition, pages
2010. Vol. 6, no 12, e1001256- p.
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Medical and Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-144497DOI: 10.1371/journal.pgen.1001256ISI: 000285578900034PubMedID: 21203500OAI: oai:DiVA.org:uu-144497DiVA: diva2:393742
Available from: 2011-02-01 Created: 2011-01-31 Last updated: 2011-02-01Bibliographically approved

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