Enzymatic and Chemoenzymatic Syntheses of Disialyl Glycans and Their Necrotizing Enterocolitis Preventing Effects

Yu, Hai; Yan, Xuebin; Autran, Chloe; Li, Yanhong; Etzold, Sabrina; Latasiewicz, Joanna; Robertson, Bianca; Li, Jiaming; Bode, Lars; Chen, Xi

doi:10.1021/acs.joc.7b02167

Cited by 38 publications

(30 citation statements)

References 35 publications

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“…Galβ1–3GalNAc ( 34 ) (30 mg, 0.078 mmol), Neu5Ac (37 mg, 0.117 mmol), and cytidine 5′-triphosphate (CTP) (66 mg, 0.117 mmol) were dissolved in a solution containing Tris-HCl buffer (8.0 ml, 100 m m , pH 8.5) and MgCl 2 (20 m m ). Neisseria meningitidi s cytidine 5′-monophosphate-sialic acid (CMP-sialic acid) synthetase ( 35 ) (1.0 mg) and Pasteurella multocida sialyltransferase 1 M144D ( 36 ) (1.5 mg) were then added.…”

Section: Methodsmentioning

confidence: 99%

Tandem sialoglycan-binding modules in a Streptococcus sanguinis serine-rich repeat adhesin create target dependent avidity effects

Stubbs

Bensing

Yamakawa

et al. 2020

Journal of Biological Chemistry

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Siglec-like domains of streptococcal serine-rich repeat (SRR) adhesins recognize sialylated glycans on human salivary, platelet, and plasma glycoproteins via a “YTRY” sequence motif. The SRR adhesin from Streptococcus sanguinis strain SK1 has tandem sialoglycan-binding domains and has previously been shown to bind sialoglycans with high affinity. However, both domains contain substitutions within the canonical “YTRY” motif, making it unclear how they interact with host receptors. To identify how the S. sanguinis strain SK1 SRR adhesin affects interactions with sialylated glycans and glycoproteins, we determined high-resolution crystal structures of the binding domains alone and with purified trisaccharides. These structural studies identify that the ligands still bind at the non-canonical binding motif, but with fewer hydrogen-bonding interactions to the protein than is observed in structures of other Siglec-like adhesins. Complementary biochemical studies identify that each of the two binding domains has a different selectivity profile. Interestingly, the binding of SK1 to platelets and plasma glycoproteins identifies that the interaction to some host targets is dominated by the contribution of one binding domain, while the binding to other host receptors is mediated by both binding domains. These results provide insight into outstanding questions concerning the roles of tandem domains in targeting host receptors and suggest mechanisms for how pathogens can adapt to the availability of a range of related but non-identical host receptors. They further suggest that the definition of the “YTRY” motif should be changed to ϕTRX, a more rigorous description of this sialic acid-recognition motif given recent findings.

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Section: Methodsmentioning

confidence: 99%

Tandem sialoglycan-binding modules in a Streptococcus sanguinis serine-rich repeat adhesin create target dependent avidity effects

Stubbs

Bensing

Yamakawa

et al. 2020

Journal of Biological Chemistry

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“…Thanks to intensive development in the field of biotechnology (advanced biotechnological and/or chemical methods of oligosaccharides synthesis) and the possibility of obtaining large quantities of bioactive compounds on an industrial scale, there were efforts to enrich the artificial milk mixtures of certain oligosaccharides structures identical as in human milk [3,5,21,23,138,[153][154][155][156]. Enrichment of bovine-based infant formula with fucosylated oligosaccharides is necessary since the concentration and composition of cow's milk oligosaccharides are radically different from those of human milk (Table 2).…”

Section: Fucosylated Hmos and Bovine Glycoproteins In Infant Formulamentioning

confidence: 99%

The Impact of Dietary Fucosylated Oligosaccharides and Glycoproteins of Human Milk on Infant Well-Being

Orczyk-Pawiłowicz

Lis-Kuberka

2020

Nutrients

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Apart from optimal nutritional value, human milk is the feeding strategy to support the immature immunological system of developing newborns and infants. The most beneficial dietary carbohydrate components of breast milk are human milk oligosaccharides (HMOs) and glycoproteins (HMGs), involved in both specific and nonspecific immunity. Fucosylated oligosaccharides represent the largest fraction of human milk oligosaccharides, with the simplest and the most abundant being 2′-fucosyllactose (2′-FL). Fucosylated oligosaccharides, as well as glycans of glycoproteins, as beneficial dietary sugars, elicit anti-adhesive properties against fucose-dependent pathogens, and on the other hand are crucial for growth and metabolism of beneficial bacteria, and in this aspect participate in shaping a healthy microbiome. Well-documented secretor status related differences in the fucosylation profile of HMOs and HMGs may play a key but underestimated role in assessment of susceptibility to fucose-dependent pathogen infections, with a potential impact on applied clinical procedures. Nevertheless, due to genetic factors, about 20% of mothers do not provide their infants with beneficial dietary carbohydrates such as 2′-FL and other α1,2-fucosylated oligosaccharides and glycans of glycoproteins, despite breastfeeding them. The lack of such structures may have important implications for a wide range of aspects of infant well-being and healthcare. In light of the above, some artificial mixtures used in infant nutrition are supplemented with 2′-FL to more closely approximate the unique composition of maternal milk, including dietary-derived fucosylated oligosaccharides and glycoproteins.

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“…For example, lacto-N-neotetraose (LNnT) ( Figure 12) can be synthesized from lactose, an inexpensive disaccharide, using GlcNAc activation and transfer OPME system (OPME1) followed by Gal activation and transfer OPME system (OPME2). Direct α2-6-sialylation of the resulting LNnT with a OPME α2-6-sialylation system containing Pd2,6ST (OPME3) led to the addition of sialic acid residues to both Gal moieties [49,50]. Alternating the sequence of OPME2 and OPME3 reactions led to the formation of monosialylated product with only one sialic acid α2-6-linked to the internal Gal of LNnT moiety.…”

Section: Altering the Order Of Multiple Glycosylation Processesmentioning

confidence: 99%

Strategies for chemoenzymatic synthesis of carbohydrates

McArthur

Chen

2019

Carbohydrate Research

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Carbohydrates are structurally complex but functionally important biomolecules. Therefore, they have been challenging but attractive synthetic targets. While substantial progress has been made on advancing chemical glycosylation methods, incorporating enzymes into carbohydrate synthetic schemes has become increasingly practical as more carbohydrate biosynthetic and metabolic enzymes as well as their mutants with synthetic application are identified and expressed for preparative and large-scale synthesis. Chemoenzymatic strategies that integrate the flexibility of chemical derivatization with enzyme-catalyzed reactions have been extremely powerful. Briefly summarized here are our experiences on developing one-pot multienzyme (OPME) systems and representative chemoenzymatic strategies from others using glycosyltransferase-catalyzed reactions for synthesizing diverse structures of oligosaccharides, polysaccharides, and glycoconjugates. These strategies allow the synthesis of complex carbohydrates including those containing naturally occurring carbohydrate postglycosylational modifications (PGMs) and nonnatural functional groups. By combining these strategies with facile purification schemes, synthetic access to the diverse space of carbohydrate structures can be automated and will not be limited to specialists.

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Enzymatic and Chemoenzymatic Syntheses of Disialyl Glycans and Their Necrotizing Enterocolitis Preventing Effects

Cited by 38 publications

References 35 publications

Tandem sialoglycan-binding modules in a Streptococcus sanguinis serine-rich repeat adhesin create target dependent avidity effects

Tandem sialoglycan-binding modules in a Streptococcus sanguinis serine-rich repeat adhesin create target dependent avidity effects

The Impact of Dietary Fucosylated Oligosaccharides and Glycoproteins of Human Milk on Infant Well-Being

Strategies for chemoenzymatic synthesis of carbohydrates

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