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DMF Replicator A defining feature of living cells is their ability to self-replicate; but creating artificial cells with this capability remains challenging, due to the complexity of biological division machinery. Rather than seeking to reconstitute this machinery, here we take direct control of DNA replication and compartment division using digital microfluidics. This approach allows us to precisely orchestrate these two fundamental processes, providing insight into how they must be coupled for successful self-replication.

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azo-p5 ion channels. We present a synthetic ion channel whose activity can be controlled by three orthogonal stimuli (light, pH, guest/ligand). The channel is formed from a pillar[5]arene functionalized with photoswitchable tetrafluoroazobenzene moieties. We demonstrate excellent control over E:Z switching across ten incorporated photoswitches (E to Z 87%, Z to E quant.). We show that the most active isomer – the Z-isomer – forms dimeric ion channels in membranes, with selectivity for M+/Cl− symport. Single molecule planar bilayer conductance studies show distinct high and low conductance states dependent on irradiation wavelength. Finally, we demonstrate that this activity can be modulated over 170-fold by controlling pH, irradiation, and guest addition, creating a powerful addition to the canon of synthetic ion channels.

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α-helical peptide channels. Despite advances in peptide and protein design, the rational design of membrane-spanning peptides that form conducting channels remains challenging due to our imperfect understanding of the sequence-to-structure relationships that drive membrane insertion, assembly, and conductance. Here, we describe the design and computational and experimental characterization of a series of coiled coil-based peptides that form transmembrane α-helical barrels with conductive channels.

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Real-time label-free imaging of living crystallization-driven self-assembly. Our latest work now published in Nature Communications. This is the last of our pandemic papers, so no membrane biophysics! Applying label-free microscopy to watch polymer self-assembly in real-time. This lets us map directly how reaction parameters affect the composition and growth of individual 2D polymer microplatelets. A fantastic collaboration with Rachel O’Reilly at the University of Birmingham. Congratulations go to Yujie Guo for another fantastic bit of science.

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Peptidomimetic channels. Herein, we present a synthetic peptidomimetic, TBP2, which forms artificial membrane channels within Droplet Interface Bilayers (DIBs). Through real-time electrophysiology, TIRF microscopy, and single-channel recordings, we demonstrate the ability of TBP2 to mediate high-conductance transport of Na⁺ and K⁺ across the DIBs, highlighting its potential for nanobiotechnology applications in cell-free systems.

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Siyuan Zhou

Siyuan joined the group as KURF student 2022 studying Biochemistry BSc at King’s, after come back from a exchange year at Hopkins, he finished his final year on the project ‘De novo Design of Ion Channels from α-Helical Barrels ‘ and continues his PhD on De novo protein channel design research as a BBSRC LIDo project student. Outside lab he is a reptile keeper and scuba diver.

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α-helical peptide channels. Despite advances in peptide and protein design, the rational design of membrane-spanning peptides that form conducting channels remains challenging due to our imperfect understanding of the sequence-to-structure relationships that drive membrane insertion, assembly, and conductance. Here, we describe the design and computational and experimental characterization of a series of coiled coil-based peptides that form transmembrane α-helical barrels.

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Adelina Krusteva

Adelina’s journey began during an industrial placement year at Ipsen, where she gained hands-on experience in protein engineering working with Botulinum toxins. After completing her BSc at King’s, she joined the Wallace lab to continue work on the translocation mechanism of BoNT. Outside the lab, she is a painter and a practitioner of BJJ and Muay Thai—pursuing these passions when inspiration and energy align.