Understanding Interfaces

Proteins are highly sensitive to their surrounding environment, and their stability and function are often governed by interactions at biomolecular interfaces. In non-native environments, such as formulation systems or biological barriers, these interfacial interactions can lead to protein destabilisation, aggregation, or loss of activity, limiting the effectiveness of protein therapeutics.

Our work has focused on uncovering how specific intermolecular interactions and structural features at the protein surface govern these behaviours. We have shown that protein modification is not uniformly distributed, but is dictated by tertiary structure, residue accessibility, and the local physicochemical environment, linking protein structure directly to interfacial reactivity and functional outcomes. Building on this mechanistic understanding, we have investigated protein–surfactant and protein–polymer interactions, demonstrating how strategies such as hydrophobic ion pairing (HIP) can be used to modulate protein surface properties and control solubility, stability, and activity. Through systematic studies, we have established that these interactions are not simply formulation tools, but fundamental drivers of protein behaviour in complex environments.

We have also demonstrated how interfacial design strategies can directly influence biological performance, including enhanced stability and activity through macromolecular and supramolecular conjugation approaches, and how these principles extend to complex biological systems. In parallel, our work has contributed to defining this area more broadly through the study of artificial lipidation as a strategy for biomolecular interface engineering, highlighting how both covalent and supramolecular approaches can be used to modulate protein behaviour across scales, from molecular structure to therapeutic performance.