Allosteric regulation of the tyrosine phosphatase PTP1B by a protein-protein interaction.

The rapid identification of protein-protein interactions has been significantly enabled by mass spectrometry (MS) proteomics-based methods, including affinity purification-MS, crosslinking-MS, and proximity-labeling proteomics. While these methods can reveal networks of interacting proteins, they cannot reveal how specific protein-protein interactions alter protein function or cell signaling. For instance, when two proteins interact, there can be emergent signaling processes driven purely by the individual activities of those proteins being co-localized.

Conformational Analysis of Swallowtail Motifs in Porphyrins.

Aqueous solubilization of porphyrins, often accomplished with appended polar aryl groups, can also be achieved with symmetrically branched alkyl (i.e., swallowtail) groups terminated with polar moieties.

The Influence of the Chemical Composition of Beeswax Foundation Sheets on Their Acceptability by the Bee's Colony.

Beeswax is one of the most important products for the well-being of bee colonies. The wax glands of young worker bees produce beeswax, which serves as a building material for honeycomb construction. Beekeepers using hives with mobile frames mainly utilize local beeswax to make foundations.

Analyses of translation factors Dbp1 and Ded1 reveal the cellular response to heat stress to be separable from stress granule formation.

Ded1 and Dbp1 are paralogous conserved DEAD-box ATPases involved in translation initiation in yeast. In long-term starvation states, Dbp1 expression increases and Ded1 decreases, whereas in cycling mitotic cells, Dbp1 is absent. Inserting DBP1 in place of DED1 cannot replace Ded1 function in supporting mitotic translation, partly due to inefficient translation of the DBP1 coding region.

Aphthous-Like Lesions in a Patient Across Two Courses of COVID-19 Infection: A Case Report.

Numerous changes in the oral cavity have been associated with COVID-19 infection, including the appearance of aphthous-like lesions. However, the precise relationship between COVID-19 and aphthous-like lesions remains unclear and poorly explained. We present the case of a 34-year-old man with no prior medical conditions who developed aphthous-like lesions three days after the onset of the COVID-19 infection.