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When biological material is frozen, cryoprotectants are used to prevent ice damage. How do newly emerging polymeric cryoprotectants control ice formation and growth during freezing?

The discovery of how hormone-like molecules turn on antibiotic production in soil bacteria could unlock the untapped opportunities for medicines that are under our very feet.

An international team of scientists working in the Department of Chemistry, the School of Life Sciences and the 糖心TV Integrative Synthetic Biology Centre at the University of 糖心TV, UK, and Monash University, Australia, have determined the molecular basis of a biological mechanism that could enable more efficient and cost-effective production of existing antibiotics, and also allow scientists to uncover new antibiotics in soil bacteria.

It is detailed in a new study published in the journal Nature.

Professor Matthew Gibson has been awarded the 2021 McBain medal from the Society for Chemical Industry and Royal Society of Chemistry. This award is to "honour an early career researcher or technologist who has made a meritorious contribution to colloid and interface science." There were will be a special symposia late in 2021 where Matt will receive the medal and give a lecture.

Glycans (aka sugars, carbohydrates) direct many recognition and signalling processes in biology. Multivalency (presentation of lots of copies) is crucial to overcome glycans intrinsic low affinity, hence materials (polymers, particles, surfaces) which display them are appealing probes of function, or as new diagnostics (e.g. s). However, most studies use simple monosaccharides, which may not have selectivity or are only tested against plant proteins. In this work, we collaborated with teams from Bristol, York and Southampton - our collaborators developed a chemoenzymatic synthesis to obtainselectively fluorinated glycans based on lacto-N-biose. Fluorine is appealing as it is small, does no have significant effects on conformation, but can change hydrogen bonding patterns. These glycans were incorporated into our polymer-stabilised nanoparticle platform, and found to modulate the affinity towards 2 galectins -an important class of galactose-binding biomarkers. This work shows that unnatural glycan-functional nanoparticles could be deployed as biosensors.

Oxidative Addition of a Mechanically Entrapped C(sp)-C(sp) Bond to a Rhodium(I) Pincer Complex

By use of a macrocyclic phosphinite pincer ligand and bulky substrate substituents, researchers in the Chaplin group have demonstrated how the mechanical bond can be leveraged to promote the oxidative addition of an interlocked 1,3鈥恉iyne to a rhodium(I) center. The resulting rhodium(III) bis(alkynyl) product can be trapped out by reaction with carbon monoxide or intercepted through irreversible reaction with dihydrogen, resulting in selective hydrogenolysis of the C鈭扖 蟽鈥恇ond.

HOT article in Angew. Chem. Int. Ed.

Resistance has emerged to vancomycin, a last-resort antibiotic for treatment of MRSA. The VanSR regulatory system induces expression of resistance genes upon exposure; however, the mechanism of vancomycin detection was unclear. Through solution NMR and other biophysical methods, we reveal a direct interaction between vancomycin and the extracellular domain of VanS from Streptomyces coelicolor. The VanS-binding epitope within vancomycin was mapped to a region distinct from the binding site for Lipid II. In targeting a separate site, the effective VanS ligand concentration includes both free and lipid-bound molecules, facilitating VanS activation. This is the first molecular description of the VanS/vancomycin interface, and could direct engineering of future therapeutics.