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Bergenin is a rare C-glycoside of 4-O-methyl gallic acid with multiple pharmacological properties. Here, the authors report the elucidation of the biosynthetic pathway of bergenin in Ardisia japonica and its bioproduction by engineered E. coli.
Triacylglycerol remodeling in Physaria fendleri changes the seed oil fatty acid composition after initial synthesis to overcome metabolic bottlenecks in the accumulation of valuable unusual fatty acids. This process enhances designer oil engineering.
Rare disease DEDSSH1-associated DPH1 mutations impair eEF2 diphthamide modification that leads to eEF2 as a transcriptional coactivator for p53 to enhance expression of the cell proliferation inhibitor p21, resulting in birth defects.
Oxygen is an essential requirement for aerobic organisms. Here the authors explore the role of oxygen in the antiviral innate response in multiple models of infection and suggest oxygen enhances the antiviral innate response via EGLN1 hydroxylation of IRF3.
The pore-forming toxin pneumolysin is responsible for the high mortality seen in pneumococcal infections unresponsive to antibiotics. In this work, authors report a small molecule inhibitor targeting pneumolysin and related ones as an anti-virulence strategy protecting human cells during infection.
The authors demonstrate 3D chemical imaging of organic and inorganic materials near or below one-nanometer resolution using multi-modal electron tomography, by fusing elastic and inelastic scattering signals.
The human papillomavirus (HPV) E6 oncoprotein hijacks the ligase activity of the host E6AP to ubiquitinate the tumor suppressor p53. Here, the authors show how the presence of the HPV E6 oncoprotein transforms the inactive E6AP monomer into an active dimer, providing a structural understanding of the physiological and pathophysiological mechanisms of E6AP function.
Manipulating the electronic properties of topological semimetals is a central goal of modern condensed matter physics research. Here, the authors demonstrate how a high-entropy engineering approach allows for the tuning of the crystal structure and the electronic states in a Dirac semimetal.
Point defects in 2D semiconductors have potential for quantum computing applications, but their controlled design and synthesis remains challenging. Here, the authors identify and fabricate a promising quantum defect in 2D WS2 via high-throughput computational screening and scanning tunnelling microscopy.
Immunization via the respiratory route is predicted to increase the effectiveness of SARS-CoV-2 vaccines. Here, Kaiser et al. describe a murine pneumonia virus vectored vaccine expressing spike protein, and show that intranasal immunization of male rhesus macaques provides good mucosal and systemic immunogenicity and efficacy.
Phase singularities are intimately related to orbital angular momentum. Direct local imaging of orbital angular momentum effects at the nanoscale remains challenging. Here, the authors demonstrate via scanning tunnelling microscopy that inter-orbital angular momentum scatterings induced by asymmetric potentials can modulate the phase singularities and induce single-wavefront dislocations.
Genomic analyses have indicated that a small number of virus particles usually found new infections. Here, the authors use a mathematical model to show that this small transmission bottleneck is a result of the physical processes of airborne virus emission, diffusion, and inhalation.
Glutamine synthetase (GS) relies on Adenosine triphosphate (ATP) to activate glutamate (Glu) and are vital for maintaining ammonia and Glu homeostasis, but GS function is impaired during ATP-deficient neurotoxic events. Here the authors report polyphosphate-manganese nanosheets having GS-like activity independent of ATP to promote the conversion of Glu to glutamine in excitatory neurotoxic cells.
Accurate modeling of X-ray absorption (XA) is necessary to interpret experimental spectra. Here, the authors use coupled cluster models and path-integral ab initio molecular dynamics to provide insights into the XA spectrum of liquid water.