Proximity-Induced Superconductivity in New Superstructures on 2H-NbSe2 Surface

Using scanning tunneling microscopy we observe a stripe phase smoothly interfacing with a triangular 2 ×2 super- structure on the surface of 2H-NbSe2 single crystM. Proximity-induced superconductivity is demonstrated in these new ordered structures by measurements of low-temperature tunneling spectra. The modulation of superconduc- tivity by the reconstruction provides an opportunity to understand the interplay between superconductivity and charge orders.

Proximity-induced amino-yne reaction for selective MDM4 conjugation via propargylated sulfonium

Whilst most bioorthogonal reactions focus on targeting binding-site cysteine residues,proximity-induced reactivity effect ensures that reaction also occurs at nucleophilic lysine residues.We report one example here that the propargylated-sulfonium center undergoes a nucleophilic reaction with lysine residue via proximity-induced conjugation.This propargylated-sulfonium tethered peptide resulting from a facile propargylation of thiolethers,enables amino-yne reaction at the selected lysine on MDM4 protein.This strategy represents a viable approach of lysine-targeted covalent inhibition in proximity.

Novel voltage signal at proximity-induced superconducting transition temperature in gold nanowires

We observed a novel voltage peak in the proximity-induced superconducting gold(Au) nanowire while cooling the sample through the superconducting transition temperature. The voltage peak turned dip during warming. The voltage peak or dip was found to originate respectively from the emergence or vanishing of the proximity-induced superconductivity in the Au nanowire.The amplitude of the voltage signal depends on the temperature scanning rate, and it cannot be detected when the temperature is changed slower than 0.03 K/min. This transient feature suggests the non-equilibrium property of the effect. Ginzburg-Landau model clarified the voltage peak by considering the emergence of Cooper pairs of relatively lower free energy in superconducting W contact and the non-equilibrium diffusion of Cooper pairs and quasiparticles.

Expanding the horizons of targeted protein degradation:A non-small molecule perspective

Targeted protein degradation(TPD)represented by proteolysis targeting chimeras(PROTACs)marks a significant stride in drug discovery.A plethora of innovative technologies inspired by PROTAC have not only revolutionized the landscape of TPD but have the potential to unlock functionalities beyond degradation.Non-small-molecule-based approaches play an irreplaceable role in this field.A wide variety of agents spanning a broad chemical spectrum,including peptides,nucleic acids,antibodies,and even vaccines,which not only prove instrumental in overcoming the constraints of conventional small molecule entities but also provided rapidly renewing paradigms.Herein we summarize the burgeoning non-small molecule technological platforms inspired by PROTACs,including three major trajectories,to provide insights for the design strategies based on novel paradigms.

A bifunctional vinyl-sulfonium tethered peptide induced by thio-Michael-type addition reaction

The modification and functionalization of peptides is of great significance in modern biotechnology and drug development. Here we report a highly reactive Michael-type warhead for the covalently modification of cysteine on peptide and protein. By installing a vinyl group onto a methionine residue of peptide,the produced vinyl sulfonium can be efficiently nucleophilic added by appropriate cysteine residue of this peptide, and thus yield a cyclized peptide. This peptide cyclization strategy was proven to exhibit improved cell penetration and good stability. Moreover, a peptide ligand bearing vinyl sulfonium could covalently bind to the cysteine in the target protein, indicating the potential of vinyl sulfonium as a novel warhead for developing covalent peptide inhibitor.