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The Svedberg Lecture 2017. From nano to micro: the huge dynamic range of the analytical ultracentrifuge for characterizing the sizes, shapes and interactions of molecules and assemblies in biochemistry and polymer science (2018)
Journal Article
Harding, S. E., Wakefield, J., Gillis, R., Adams, G., & McQueen, C. (2018). The Svedberg Lecture 2017. From nano to micro: the huge dynamic range of the analytical ultracentrifuge for characterizing the sizes, shapes and interactions of molecules and assemblies in biochemistry and polymer science. European Biophysics Journal, 47(7), 697–707. https://doi.org/10.1007/s00249-018-1290-6

The analytical ultracentrifuge (AUC) invented by T. Svedberg has now become an extremely versatile and diverse tool in Biochemistry and Polymer Science for the characterisation of the sizes, shapes and interactions of particles ranging in size from a... Read More about The Svedberg Lecture 2017. From nano to micro: the huge dynamic range of the analytical ultracentrifuge for characterizing the sizes, shapes and interactions of molecules and assemblies in biochemistry and polymer science.

Full hydrodynamic reversibility of the weak dimerization of vancomycin and elucidation of its interaction with VanS monomers at clinical concentration (2017)
Journal Article
Phillips-Jones, M. K., Lithgo, R., Dinu, V., Gillis, R. B., Harding, J. E., Adams, G. G., & Harding, S. E. (2017). Full hydrodynamic reversibility of the weak dimerization of vancomycin and elucidation of its interaction with VanS monomers at clinical concentration. Scientific Reports, 7(1), 1-10. https://doi.org/10.1038/s41598-017-12620-z

The reversibility and strength of the previously established dimerization of the important glycopeptide antibiotic vancomycin in four different aqueous solvents (including a medically-used formulation) have been studied using short-column sedimentati... Read More about Full hydrodynamic reversibility of the weak dimerization of vancomycin and elucidation of its interaction with VanS monomers at clinical concentration.

In situ polymerisation of isoeugenol as a green consolidation method for waterlogged archaeological wood (2017)
Journal Article
McHale, E., Steindal, C. C., Kutzke, H., Benneche, T., & Harding, S. E. (2017). In situ polymerisation of isoeugenol as a green consolidation method for waterlogged archaeological wood. Scientific Reports, 7, Article 46481. https://doi.org/10.1038/srep46481

Waterlogged archaeological wood is often in need of consolidation prior to drying to prevent shrinkage and cracking of the object. There is a need for new greener materials (than for example polyethylene glycol) and methods for consolidation to be de... Read More about In situ polymerisation of isoeugenol as a green consolidation method for waterlogged archaeological wood.

Assessing sedimentation equilibrium profiles in analytical ultracentrifugation experiments on macromolecules: from simple average molecular weight analysis to molecular weight distribution and interaction analysis (2016)
Journal Article
Harding, S. E., Gillis, R. B., & Adams, G. G. (in press). Assessing sedimentation equilibrium profiles in analytical ultracentrifugation experiments on macromolecules: from simple average molecular weight analysis to molecular weight distribution and interaction analysis. Biophysical Reviews, 8(4), https://doi.org/10.1007/s12551-016-0232-8

Molecular weights (molar masses), molecular weight distributions, dissociation constants and other interaction parameters are fundamental characteristics of proteins, nucleic acids, polysaccharides and glycoconjugates in solution. Sedimentation equil... Read More about Assessing sedimentation equilibrium profiles in analytical ultracentrifugation experiments on macromolecules: from simple average molecular weight analysis to molecular weight distribution and interaction analysis.

Foreword to ‘Quantitative and analytical relations in biochemistry’—a special issue in honour of Donald J. Winzor’s 80th birthday (2016)
Journal Article
Hall, D., & Harding, S. E. (2016). Foreword to ‘Quantitative and analytical relations in biochemistry’—a special issue in honour of Donald J. Winzor’s 80th birthday. Biophysical Reviews, 8(4), 269-277. https://doi.org/10.1007/s12551-016-0227-5

The purpose of this special issue is to honour Professor Donald J. Winzor’s long career as a researcher and scientific mentor, and to celebrate the milestone of his 80th birthday. Throughout his career, Don has been renowned for his development of cl... Read More about Foreword to ‘Quantitative and analytical relations in biochemistry’—a special issue in honour of Donald J. Winzor’s 80th birthday.

Solution conformation and flexibility of capsular polysaccharides from Neisseria meningitidis and glycoconjugates with the tetanus toxoid protein (2016)
Journal Article
Abdelhameed, A. S., Morris, G. A., Almutairi, F., Adams, G. G., Duvivier, P., Conrath, K., & Harding, S. E. (in press). Solution conformation and flexibility of capsular polysaccharides from Neisseria meningitidis and glycoconjugates with the tetanus toxoid protein. Scientific Reports, 6(1), 1-11. https://doi.org/10.1038/srep35588

The structural integrity of meningococcal native, micro-fluidized and activated capsular polysaccharides and their glycoconjugates – in the form most relevant to their potential use as vaccines (dilute solution) - have been investigated with respect... Read More about Solution conformation and flexibility of capsular polysaccharides from Neisseria meningitidis and glycoconjugates with the tetanus toxoid protein.

Both reversible self-association and structural changes underpin molecular viscoelasticity of mAb solutions (2016)
Journal Article
Sarangapani, P. S., Weaver, J., Parupudi, A., Besong, T. M., Adams, G. G., Harding, S. E., …Pathak, J. A. (2016). Both reversible self-association and structural changes underpin molecular viscoelasticity of mAb solutions. Journal of Pharmaceutical Sciences, 105(12), https://doi.org/10.1016/j.xphs.2016.08.020

The role of antibody structure (conformation) in solution rheology is probed. It is demonstrated here that pH-dependent changes in the tertiary structure of 2 mAb solutions lead to viscoelasticity and not merely a shear viscosity (η) increase. Steady... Read More about Both reversible self-association and structural changes underpin molecular viscoelasticity of mAb solutions.

Genetic improvement of tomato by targeted control of fruit softening (2016)
Journal Article
Uluisik, S., Chapman, N. H., Smith, R., Poole, M., Adams, G., Gillis, R. B., …Seymour, G. B. (2016). Genetic improvement of tomato by targeted control of fruit softening. Nature Biotechnology, 34, 950-952. https://doi.org/10.1038/nbt.3602

Controlling the rate of softening to extend shelf life was a key target for researchers engineering genetically modified (GM) tomatoes in the 1990s, but only modest improvements were achieved. Hybrids grown nowadays contain 'non-ripening mutations' t... Read More about Genetic improvement of tomato by targeted control of fruit softening.

The chelation of colonic luminal iron by a unique sodium alginate for the improvement of gastrointestinal health (2016)
Journal Article
Horniblow, R. D., Latunde-Dada, G. O., Harding, S. E., Schneider, M., Almutairi, F. M., Sahni, M., …Tselepis, C. (2016). The chelation of colonic luminal iron by a unique sodium alginate for the improvement of gastrointestinal health. Molecular Nutrition and Food Research, 60(9), 2098-2108. https://doi.org/10.1002/mnfr.201500882

Scope

Iron is an essential nutrient. However, in animal models, excess unabsorbed dietary iron residing within the colonic lumen has been shown to exacerbate inflammatory bowel disease and intestinal cancer. Therefore, the aims of this study were... Read More about The chelation of colonic luminal iron by a unique sodium alginate for the improvement of gastrointestinal health.

Purification of bacterial membrane sensor kinases and biophysical methods for determination of their ligand and inhibitor interactions (2016)
Journal Article
Hussain, R., Harding, S. E., Hughes, C. S., Ma, P., Patching, S. G., Edara, S., …Phillips-Jones, M. K. (2016). Purification of bacterial membrane sensor kinases and biophysical methods for determination of their ligand and inhibitor interactions. Biochemical Society Transactions, 44(3), 810-823. https://doi.org/10.1042/BST20160023

This article reviews current methods for the reliable heterologous overexpression in Escherichia coli and purification of milligram quantities of bacterial membrane sensor kinase (MSK) proteins belonging to the two-component signal transduction famil... Read More about Purification of bacterial membrane sensor kinases and biophysical methods for determination of their ligand and inhibitor interactions.

Molecular weight analysis of starches: which technique? (2016)
Journal Article
Harding, S. E., Adams, G. G., & Gillis, R. B. (2016). Molecular weight analysis of starches: which technique?. Starch/Stärke, 68(9-10), https://doi.org/10.1002/star.201600042

A number of methods are available to researchers for estimating molecular weights (molar masses) and molecular weight distributions of starches − or those in solution, using an appropriate solvent/solubilisation protocol. We outline the methods avail... Read More about Molecular weight analysis of starches: which technique?.

A glycoconjugate of Haemophilus influenzae Type b capsular polysaccharide with tetanus toxoid protein: hydrodynamic properties mainly influenced by the carbohydrate (2016)
Journal Article
Abdelhameed, A. S., Adams, G. G., Morris, G. A., Almutairi, F. M., Duvivier, P., Conrath, K., & Harding, S. E. (2016). A glycoconjugate of Haemophilus influenzae Type b capsular polysaccharide with tetanus toxoid protein: hydrodynamic properties mainly influenced by the carbohydrate. Scientific Reports, 6(1), Article 22208. https://doi.org/10.1038/srep22208

Three important physical properties which may affect the performance of glycoconjugate vaccines against serious disease are molar mass (molecular weight), heterogeneity (polydispersity), and conformational flexibility in solution. The dilute solution... Read More about A glycoconjugate of Haemophilus influenzae Type b capsular polysaccharide with tetanus toxoid protein: hydrodynamic properties mainly influenced by the carbohydrate.

Coiled coil type neoglycoproteins presenting three lactose residues (2016)
Journal Article
Sweeney, S. M., Bullen, G. A., Gillis, R. B., Adams, G. G., Rowe, A. J., Harding, S. E., …Murphy, P. V. (2016). Coiled coil type neoglycoproteins presenting three lactose residues. Tetrahedron Letters, 57(13), https://doi.org/10.1016/j.tetlet.2016.02.005

Scaffold design, synthesis and application are relevant for biomedical research. For example, multivalent interactions, such as those between cell surface glycoproteins and lectins can influence the potency and duration of signalling. The spacing bet... Read More about Coiled coil type neoglycoproteins presenting three lactose residues.

Location dependent coordination chemistry and MRI relaxivity, in de novo designed lanthanide coiled coils (2015)
Journal Article
Berwick, M. R., Slope, L. N., Smith, C. F., King, S. M., Newton, S. L., Gillis, R. B., …Peacock, A. F. A. (in press). Location dependent coordination chemistry and MRI relaxivity, in de novo designed lanthanide coiled coils. Chemical Science, 7(3), https://doi.org/10.1039/c5sc04101e

Herein, we establish for the first time the design principles for lanthanide coordination within coiled coils, and the important consequences of binding site translation. By interrogating design requirements and by systematically translating binding... Read More about Location dependent coordination chemistry and MRI relaxivity, in de novo designed lanthanide coiled coils.

Application of recent advances in hydrodynamic methods for characterising mucins in solution (2015)
Journal Article
Almutairi, F. M., Cifre, J. H., Adams, G. G., Kök, M. S., Mackie, A. R., de la Torre, J. G., & Harding, S. E. (2016). Application of recent advances in hydrodynamic methods for characterising mucins in solution. European Biophysics Journal, 45(1), 45-54. https://doi.org/10.1007/s00249-015-1075-0

Mucins are the primary macromolecular component of mucus—nature’s natural lubricant—although they are poorly characterised heterogeneous substances. Recent advances in hydrodynamic methodology now offer the opportunity for gaining a better understand... Read More about Application of recent advances in hydrodynamic methods for characterising mucins in solution.

Sodium alginate decreases the permeability of intestinal mucus (2015)
Journal Article
Mackie, A. R., Macierzanka, A., Aarak, K., Rigby, N. M., Parker, R., Channell, G. A., …Bajka, B. H. (2016). Sodium alginate decreases the permeability of intestinal mucus. Food Hydrocolloids, 52, https://doi.org/10.1016/j.foodhyd.2015.08.004

In the small intestine the nature of the environment leads to a highly heterogeneous mucus layer primarily composed of the MUC2 mucin. We set out to investigate whether the soluble dietary fibre sodium alginate could alter the permeability of the muc... Read More about Sodium alginate decreases the permeability of intestinal mucus.

Evaluation of diffusion coefficients by means of an approximate steady-state condition in sedimentation velocity distributions (2015)
Journal Article
Scott, D. J., Harding, S. E., & Winzor, D. J. (2015). Evaluation of diffusion coefficients by means of an approximate steady-state condition in sedimentation velocity distributions. Analytical Biochemistry, 490, https://doi.org/10.1016/j.ab.2015.08.017

This investigation examined the feasibility of manipulating the rotor speed in sedimentation velocity experiments to spontaneously generate an approximate steady-state condition where the extent of diffusional spreading is matched exactly by the boun... Read More about Evaluation of diffusion coefficients by means of an approximate steady-state condition in sedimentation velocity distributions.

Biophysical analysis of a lethal laminin alpha-1 mutation reveals altered self-interaction (2015)
Journal Article
Patel, T. R., Nikodemus, D., Besong, T. M., Reuten, R., Meier, M., Harding, S. E., …Stetefeld, J. (2016). Biophysical analysis of a lethal laminin alpha-1 mutation reveals altered self-interaction. Matrix Biology, 49, https://doi.org/10.1016/j.matbio.2015.06.005

Laminins are key basement membrane molecules that influence several biological activities and are linked to a number of diseases. They are secreted as heterotrimeric proteins consisting of one α, one β, and one γ chain, followed by their assembly int... Read More about Biophysical analysis of a lethal laminin alpha-1 mutation reveals altered self-interaction.