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Updated: Feb 12, 2026
11:22
Automated Robotic Liquid Handling Assembly of Modular DNA Devices
Published on: December 1, 2017
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Automated Assembly of Polyglucuronic Acids for Structural Explorations
Sandhya N Mardhekar1, Dominik Weh1,2, Martina Delbianco1
1Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany.
Journal of the American Chemical Society
|February 11, 2026
Summary
Researchers precisely synthesized polyglucuronic acid (PGA) oligomers using automated glycan assembly. These well-defined models reveal insights into calcium binding and offer a framework for developing novel glycomaterials.
Area of Science:
- Biopolymer synthesis
- Carbohydrate chemistry
- Materials science
Background:
- Polyuronic acids are crucial marine biopolymers involved in vital biological processes.
- Their structural heterogeneity complicates understanding structure-function relationships.
Purpose of the Study:
- To develop a method for precisely synthesizing defined polyglucuronic acid (PGA) oligomers.
- To investigate the structural and functional properties of these synthesized oligomers, particularly calcium binding.
Main Methods:
- Automated glycan assembly (AGA) for synthesizing β-(1-4)-linked d-glucuronic acid (GlcA) oligomers.
- Molecular dynamics simulations to analyze oligomer conformation and flexibility.
- NMR titrations to study calcium binding interactions.
Main Results:
- Successfully synthesized GlcA oligomers with controlled chain lengths and stereochemistry.
- Simulations showed a 2-fold helical conformation, with rigidity in short and flexibility in long oligomers.
- NMR revealed diffuse electrostatic calcium binding, not localized chelation.
Conclusions:
- Defined PGA oligomers serve as valuable molecular models for studying ion interactions.
- This work provides a foundation for designing advanced uronic acid-based glycomaterials with tailored properties.
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