Analysis of Glycan Recognition by Concanavalin A Using Absolute Binding Free Energy Calculations Article Swipe
Sondos Musleh
,
Irfan Alibay
,
Philip C. Biggin
,
Richard A. Bryce
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1021/acs.jcim.4c01088
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.1021/acs.jcim.4c01088
Carbohydrates are key biological mediators of molecular recognition and signaling processes. In this case study, we explore the ability of absolute binding free energy (ABFE) calculations to predict the affinities of a set of five related carbohydrate ligands for the lectin protein, concanavalin A, ranging from 27-atom monosaccharides to a 120-atom complex-type N-linked glycan core pentasaccharide. ABFE calculations quantitatively rank and estimate the affinity of the ligands in relation to microcalorimetry, with a mean signed error in the binding free energy of -0.63 ± 0.04 kcal/mol. Consequently, the diminished binding efficiencies of the larger carbohydrate ligands are closely reproduced: the ligand efficiency values from isothermal titration calorimetry for the glycan core pentasaccharide and its constituent trisaccharide and monosaccharide compounds are respectively -0.14, -0.22, and -0.41 kcal/mol per heavy atom. ABFE calculations predict these ligand efficiencies to be -0.14 ± 0.02, -0.24 ± 0.03, and -0.46 ± 0.06 kcal/mol per heavy atom, respectively. Consequently, the ABFE method correctly identifies the high affinity of the key anchoring mannose residue and the negligible contribution to binding of both β-GlcNAc arms of the pentasaccharide. While challenges remain in sampling the conformation and interactions of these polar, flexible, and weakly bound ligands, we nevertheless find that the ABFE method performs well for this lectin system. The approach shows promise as a quantitative tool for predicting and deconvoluting carbohydrate-protein interactions, with potential application to design of therapeutics, vaccines, and diagnostics.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.1021/acs.jcim.4c01088
- OA Status
- hybrid
- Cited By
- 2
- References
- 64
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4403466356
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4403466356Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.1021/acs.jcim.4c01088Digital Object Identifier
- Title
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Analysis of Glycan Recognition by Concanavalin A Using Absolute Binding Free Energy CalculationsWork title
- Type
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articleOpenAlex work type
- Language
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enPrimary language
- Publication year
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2024Year of publication
- Publication date
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2024-10-16Full publication date if available
- Authors
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Sondos Musleh, Irfan Alibay, Philip C. Biggin, Richard A. BryceList of authors in order
- Landing page
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https://doi.org/10.1021/acs.jcim.4c01088Publisher landing page
- Open access
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YesWhether a free full text is available
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hybridOpen access status per OpenAlex
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https://doi.org/10.1021/acs.jcim.4c01088Direct OA link when available
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Concanavalin A, Glycan, Absolute (philosophy), Energy (signal processing), Chemistry, Computational chemistry, Mathematics, Statistics, Biochemistry, Glycoprotein, Epistemology, Philosophy, In vitroTop concepts (fields/topics) attached by OpenAlex
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2Total citation count in OpenAlex
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2025: 2Per-year citation counts (last 5 years)
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64Number of works referenced by this work
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10Other works algorithmically related by OpenAlex
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