🧬 biology

Novel quadruple helical assembly of a Type V pilin in Porphyromonas gingivalis

This study presents the high-resolution atomic structure of the novel Type V pilin Ffp1 from *Porphyromonas gingivalis*, revealing a unique quadruple helical assembly and demonstrating its critical role in outer membrane vesicle production and polymicrobial biofilm formation with *Treponema denticola*.

Eric Reynolds, Dhana Gorasia, Nada Slakeski, May Gui, Yu_Yen Chen, Caroline Moore, Deanne Catmull, Paul Veith, Stuart Da (…)2026-07-22
🧬 biology

Gestational Diabetes Mellitus Placentas Exhibit Mitonuclear Transcriptional Imbalance Co-occurring with m6A Regulatory Gene Dysregulation: Insights from Bulk RNA Sequencing

This study reveals that gestational diabetes mellitus placentas exhibit a distinct mitonuclear transcriptional imbalance characterized by the downregulation of mitochondrial-encoded oxidative phosphorylation genes alongside the upregulation of nuclear-encoded counterparts, a phenotype that co-occurs with dysregulation of m6A regulatory genes.

Xinyu Zhang, Wenxi Tang, Linlin Guo, Han Bao, Xiafang Chen2026-07-22
🧬 biology

Three Decades of Genomic Change in FHB Resistance: Haplotype Frequency Trajectories in Northern Plains Wheat (1992-2024)

This study utilizes a haplotype-based framework to analyze three decades of wheat breeding data in the Northern Plains, revealing that Fusarium head blight resistance is highly polygenic and has improved through the directional selection of multiple small-effect resistance alleles without compromising local genetic diversity.

Jason Fiedler, Muhammad Massub Tehseen, Charlotte N Brault, Emily Conley, Andrew Read, Harsimardeep Gill, Andrew Green (…)2026-07-22
🧬 biology

Social stress alters the efficacy of 8-OH-DPAT in zebrafish tests of anxiety-like behavior

This study demonstrates that social stress in zebrafish induces anxiety-like behaviors and oxidative stress in subordinate individuals, which are reversed by the 5-HT1A receptor agonist 8-OH-DPAT, suggesting that the drug's efficacy is modulated by social hierarchy through receptor desensitization and sensitization.

Aurora Rúbria Batista Pantoja, Thaeny Regina Ribeiro Rodrigues, Adriano Oliveira Silva Meneses, Bruna Patrícia Dutra Cos (…)2026-07-22
🧬 biology

SNAPC4-related neurodevelopmental disorder defines a stage-dependent spliceosomopathy with heterogeneous clinical trajectories

This study characterizes SNAPC4-related neurodevelopmental disorder as a heterogeneous, stage-dependent spliceosomopathy caused by loss-of-function variants that destabilize the SNAPc complex and disrupt snRNA transcription, leading to a wide spectrum of clinical and neuroimaging abnormalities.

Marcello Scala, Mohammad Sadegh Shams Nosrati, Alexandra Ruffus, Alireza Dostmohammadi, Amir Hesam Nemati, Francesca Mad (…)2026-07-22
🧬 biology

Engineering a Thermostable Ketone Amination Reductase from Aspergillus oryzae via Evolution-Based Design

By integrating ancestral sequence reconstruction with structure-guided mutagenesis, researchers successfully engineered the *Aspergillus oryzae* reductive aminase to achieve significantly enhanced catalytic activity and thermostability in variants Anc74_7 and Anc75_20.

Jiaying Wu, Chuxin Wang, Wenxuan Zhang, Siqi Xu, Ximan Huang, Li Wen, Peiqin Chen, Chunying Jin, Guangya Zhang, Wei Jian (…)2026-07-22
🧬 biology

Individualised mapping of living human brain mitochondria by MRI reveals signatures of bioenergetic defects.

This study introduces MitoBrainMap, a novel, label-free MRI framework that successfully predicts individualized mitochondrial features in the living human brain, revealing age-related declines, disease-specific alterations in mitochondrial diseases, and meaningful links to systemic physiology and cognitive performance.

Michel Thiebaut de Schotten, Cynthia Liu, Catherine Kelly, Ke Bo, Tor Wager, Eugene Mosharov, Martin Picard2026-07-22
🧬 biology

Functional Gradients of the Neuraxis: Reorganization from Cortex to Spinal Cord

This study utilizes simultaneous corticospinal resting-state fMRI and functional connectivity gradients to integrate the human spinal cord into a unified low-dimensional manifold with the sensorimotor cortex, revealing an asymmetric hierarchical organization where spinal inputs broaden cortical axes while cortical inputs preserve spinal gradients, thereby extending gradient-based mapping beyond the cortex to describe the entire neuraxis as coupled manifolds.

Ekansh Sareen, Nivedya Nambiar, Boris Bernhardt, Dimitri Van De Ville2026-07-22