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| Glycosyltransferases | |
|---|---|
| Name | Glycosyltransferases |
| EC number | EC 2.4.x.x |
| Cofactors | Nucleotide sugars |
| Localization | Golgi apparatus, endoplasmic reticulum, cytosol, chloroplasts, mitochondria |
Glycosyltransferases are enzymes that catalyze the transfer of sugar moieties from activated donor molecules to specific acceptor substrates, creating glycosidic bonds that decorate proteins, lipids, and small molecules. They play central roles in post-translational modification, cell-surface architecture, and metabolic pathways across Bacteria, Archaea, and Eukarya, and are integral to processes studied by researchers at institutions such as Max Planck Society, Howard Hughes Medical Institute, and Massachusetts Institute of Technology. Their importance spans from basic science investigations at European Molecular Biology Laboratory to translational efforts at companies like Genentech and Novartis.
Glycosyltransferases constitute a large superfamily discovered through classical enzymology in laboratories associated with University of Cambridge, Harvard University, and University of Oxford, and characterized structurally by groups at Rutherford Appleton Laboratory and Diamond Light Source. Early biochemical descriptions linked their activity to pathways elucidated by scientists at Rockefeller University and in landmark studies at National Institutes of Health. They are cataloged in databases maintained by UniProt, Protein Data Bank, and KEGG and investigated using methodologies developed at Cold Spring Harbor Laboratory and Lawrence Berkeley National Laboratory.
Classification schemes derive from sequence-based families such as those organized by the Carbohydrate-Active enZYmes database and manual curation by researchers at European Bioinformatics Institute. Structural folds include GT-A, GT-B, and GT-C architectures determined in studies by teams at Stanford University, University of California, San Francisco, and Yale University. Many crystal structures deposited in the Protein Data Bank were solved with assistance from synchrotron facilities like SOLEIL and APS (Advanced Photon Source). Evolutionary relationships are explored through phylogenetics performed at Wellcome Sanger Institute and European Molecular Biology Laboratory.
Mechanistic insights into retention versus inversion of anomeric configuration emerged from kinetics work by investigators at Max Planck Institute for Biophysical Chemistry and University of Tokyo, and from computational modeling groups at Princeton University and École Polytechnique Fédérale de Lausanne. Donor specificity for nucleotide sugars such as UDP-glucose, GDP-mannose, and CMP-sialic acid links to pathways characterized at Salk Institute and Johns Hopkins University. Substrate recognition motifs have been mapped using mutagenesis approaches pioneered at Carnegie Institution for Science and high-throughput screening platforms developed at Broad Institute.
Glycosyltransferases function in N-linked and O-linked glycosylation pathways elucidated in model organisms studied at European Molecular Biology Laboratory and Cold Spring Harbor Laboratory, and in bacterial cell wall biosynthesis investigated at Max Planck Institute for Infection Biology and Pasteur Institute. They mediate glycosaminoglycan assembly relevant to research at Children's Hospital Boston and synthesize glycolipids implicated in immunology studies at Scripps Research. Pathways involving glycosyltransferases intersect with signaling cascades characterized by groups at Johns Hopkins University, Massachusetts General Hospital, and University College London.
Localization to the endoplasmic reticulum and Golgi apparatus reflects work from cell biology labs at University of California, Berkeley and Yale University, while regulatory mechanisms including transcriptional control and post-translational modification have been described by investigators at Columbia University and University of Pennsylvania. Trafficking studies have implicated coat protein complexes identified in research at EMBL-EBI and Cold Spring Harbor Laboratory, and proteostasis networks were probed by groups at National Institute of Diabetes and Digestive and Kidney Diseases and Wellcome Centre for Cell Biology.
Mutations in glycosyltransferase genes underlie congenital disorders of glycosylation characterized in clinical centers such as Mayo Clinic and Great Ormond Street Hospital, and contribute to cancer-associated glycome remodeling studied at Dana-Farber Cancer Institute and MD Anderson Cancer Center. Pathogens exploit glycosyltransferases in virulence mechanisms examined at Centers for Disease Control and Prevention and Institut Pasteur, while autoimmune and neurodegenerative links have been explored by researchers at Karolinska Institutet and Johns Hopkins University School of Medicine.
Glycoengineering platforms used by biotechnology firms including Amgen, Roche, and Biogen modify glycosylation for improved biologics, building on methods developed at Genentech and Regeneron. Vaccine design targeting glycan epitopes has been advanced by collaborations involving Gavi, the Vaccine Alliance, Bill & Melinda Gates Foundation, and academic groups at Imperial College London. Small-molecule inhibitors and substrate analogues are under development in programs at GlaxoSmithKline, Pfizer, and academic spinouts from University of Oxford and ETH Zurich.
Category:Glycobiology