Structural Insights into the Ubiquitin-Independent Midnolin-Proteasome Pathway

Academic Background Protein homeostasis (proteostasis) is a core mechanism for maintaining normal cellular function, with the ubiquitin-proteasome system (UPS) responsible for degrading approximately 80% of abnormal proteins. Traditionally, proteins were thought to require ubiquitination for recognition and degradation by the 26S proteasome. Howeve...

Improved Synapsis Dynamics Accompany Meiotic Stability in Arabidopsis Arenosa Autotetraploids

1. Research Background Meiosis is the core process of sexual reproduction in eukaryotes, generating haploid gametes through homologous chromosome pairing, synapsis, and crossover. Polyploidy is a major driver of plant evolution, but additional chromosome copies disrupt key meiotic steps, leading to sterility or genomic instability. Core scientific ...

Intercellular Contractile Force Attenuates Chemosensitivity Through Notch-MVP-Mediated Nuclear Drug Export

Academic Background Chemotherapy resistance is one of the major challenges in cancer treatment. Traditional research has primarily focused on biochemical mechanisms (e.g., drug efflux pumps, DNA repair, etc.), but in recent years, the role of biomechanical factors in tumor progression and drug resistance has gained increasing attention. Studies hav...

Unconventional Secretion of Park7 Requires Lysosomal Delivery via Chaperone-Mediated Autophagy and Specialized SNARE Complex

1. Research Background The Parkinson’s disease-associated protein PARK7/DJ-1 (hereafter referred to as PARK7) is a multifunctional protein that plays critical roles in various pathological conditions including neurodegenerative diseases, cancer, and inflammation. Despite lacking a conventional N-terminal signal peptide sequence, PARK7 can be secret...

Quantitative Spatial Analysis of Chromatin Biomolecular Condensates Using Cryoelectron Tomography

Academic Background Biomolecular condensates are membrane-less organelles formed through liquid-liquid phase separation (LLPS) within cells, playing critical roles in key biological processes such as gene expression and signal transduction. However, due to limitations in traditional imaging techniques, high-resolution structural information about t...

METTL3 Mediates Atheroprone Flow–Induced Glycolysis in Endothelial Cells

1. Research Background Atherosclerosis is the primary pathological basis of cardiovascular diseases, closely associated with endothelial cell (EC) dysfunction. Hemodynamic factors play a critical role in the regional selectivity of atherosclerosis: oscillatory shear stress (OS) (e.g., at vascular bifurcations) promotes plaque formation, while pulsa...