- 'Naked' and hydrated conformers of the conserved core pentasaccharide of N-linked glycoproteins and its building blocks
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N-glycosylation of eukaryotic proteins is widespread and vital to survival. The pentasaccharide unit -Man3GlcNAc2- lies at the protein-junction core of all oligosaccharides attached to asparagine side chains during this process. Although its absolute conservation implies an indispensable role, associated perhaps with its structure, its unbiased conformation and the potential modulating role of solvation are unknown; both have now been explored through a combination of synthesis, laser spectroscopy, and computation. The proximal -GlcNAc-GlcNAc- unit acts as a rigid rod, while the central, and unusual, -Man-β-1,4-GlcNAc- linkage is more flexible and is modulated by the distal Man-α-1,3- and Man-α-1,6- branching units. Solvation stiffens the 'rod' but leaves the distal residues flexible, through a β-Man pivot, ensuring anchored projection from the protein shell while allowing flexible interaction of the distal portion of N-glycosylation with bulk water and biomolecular assemblies.
- Barry, Conor S.,Cocinero, Emilio J.,Carcabal, Pierre,Gamblin, David P.,Stanca-Kaposta, E. Cristina,Remmert, Sarah M.,Fernandez-Alonso, Maria C.,Rudic, Svemir,Simons, John P.,Davis, Benjamin G.
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p. 16895 - 16903
(2013/12/04)
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- An endoglycosidase with alternative glycan specificity allows broadened glycoprotein remodelling
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Protein endoglycosidases are useful for biocatalytic alteration of glycans on protein surfaces, but the currently limited selectivity of endoglycosidases has prevented effective manipulation of certain N-linked glycans widely found in nature. Here we reve
- Goodfellow, Jonathan J.,Baruah, Kavitha,Yamamoto, Keisuke,Bonomelli, Camille,Krishna, Benjamin,Harvey, David J.,Crispin, Max,Scanlan, Christopher N.,Davis, Benjamin G.
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p. 8030 - 8033
(2012/07/13)
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- Synthesis of N-glycan oxazolines: donors for endohexosaminidase catalysed glycosylation
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Oxazoline mono-, di-, tri- and hexasaccharides, corresponding to the core components of N-linked glycoprotein high mannose glycans, are synthesised as potential glycosyl donors for endohexosaminidase catalysed glycosylation of glycopeptides and glycoprote
- Rising, Thomas W.D.F.,Claridge, Timothy D.W.,Davies, Nicola,Gamblin, David P.,Moir, James W.B.,Fairbanks, Antony J.
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p. 1574 - 1596
(2007/10/03)
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