G3BP-driven RNP granules promote inhibitory RNA-RNA interactions resolved by DDX3X to regulate mRNA translatability.

Ribonucleoprotein (RNP) granules have been linked to translation regulation and disease, but their assembly and regulatory mechanisms are not well understood. Here, we show that the RNA-binding protein G3BP1 preferentially interacts with unfolded RNA, driving the assembly of RNP granule-like condensates that establish RNA-RNA interactions. These RNA-RNA interactions limit the mobility and translatability of sequestered mRNAs and stabilize the condensates.

[Not Available].

Our purpose was to evaluate the approach of two different chatbots (ChatGPT and Gemini) to a list of questions about emergency department as a border area between hospital and territory. This study was performed in a single day, on 3 March 2024. Two different questions were sequentially type in Italian language, the same for each chatbot: definition of the emergency department as a border zone in Italy; possible solutions to the previous question.

Optical characterization of molecular interaction strength in protein condensates.

Biomolecular condensates have been identified as a ubiquitous means of intracellular organization, exhibiting very diverse material properties. However, techniques to characterize these material properties and their underlying molecular interactions are scarce. Here, we introduce two optical techniques-Brillouin microscopy and quantitative phase imaging (QPI)-to address this scarcity.

Revealing Missing Protein-Ligand Interactions Using AlphaFold Predictions.

Protein-ligand interactions represent an essential step to understand the bases of molecular recognition, an intense field of research in many scientific areas. Structural biology has played a central role in unveiling protein-ligand interactions, but current techniques are still not able to reliably describe the interactions of ligands with highly flexible regions. In this work, we explored the capacity of AlphaFold2 (AF2) to estimate the presence of interactions between ligands and residues belonging to disordered regions.