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Earlier sources: Science
Science investigates the natural world through observation, experiments, and mathematical models. Explore papers and developments in biology, medicine, materials, neuroscience, physics, climate, and mathematics; a reported finding is not necessarily established consensus.
SYMTRI organizes observations from public sources into a living map. Connections reflect shared subject matter; they do not establish causation or endorse a source.
Open in the map ↗1326 classified signals in the fourteen-day window. Recent momentum: steady. These counts include signals awaiting readable evidence.
Earlier sources
Up to ten sources with readable evidence, ordered by their feed timestamp. These archive sources can be older than the live fourteen-day window. This list is a sample, not a measure of total activity. Dates distinguish paper publication, repository creation, model/dataset activity, Hacker News posts, and KEV catalog additions. “First archived” records when SYMTRI first stored the signal.
- Europe PMC · Published · First archived
MacroH2A1 and H3K27me3 target cGAS to facultative heterochromatin to restrain innate immune activation ↗
The DNA sensor cGAS is largely sequestered on chromatin in an inactive form, but how this state is regulated remains unclear. We show that cGAS preferentially binds nucleosomes containing the histone variant macroH2A1 (mH2A1) marked by H3K27me3 and H3K9me3. Cryo-EM reveals that cGAS selectively engages the mH2A1/H2B acidic patch within heterotypic nucleosomes. Depleting mH2A1.1 or blocking H3K27me3 deposition releases cGAS from chromatin and activates the cGAS-STING-IRF3 pathway. Genome-wide profiling reveals two cGAS-bound chromatin compartments: chromosome-arm sites co-occupied by mH2A1.1, m
- Europe PMC · Published · First archived
Interspecific faecal microbiota transplantation tests microbial contributions to thermal physiology in lizards ↗
While the influence of microorganisms in the thermal physiology of animals is increasingly recognised, the role of the gut microbiome in enhancing phenotypic plasticity remains underexplored, particularly in ectotherms. Here, we tested the effect of gut microbiomes in modulating the physiological response of lizards to sudden temperature fluctuations. In captivity, we conducted an experiment with wild-caught Podarcis lizards: Mediterranean Podarcis liolepis (n=9) adapted to warm and dry environments, and Atlantic P. muralis (n=18) adapted to cooler and wetter conditions. Animals were assigned
- Europe PMC · Published · First archived
A quick and efficient method enabling lncRNA functional studies in the marine diatom Phaeodactylum tricornutum using a multiplexed CRISPR-Cas9 editing approach ↗
Background: Long non protein coding (lnc)RNAs are ubiquitous transcripts known to be major regulators of cellular processes in eukaryotes. In diatoms, specific lncRNA expression is tightly correlated to nutrient fluctuations, which suggests function, but their biological relevance remains to be established. In order to fill this knowledge gap, we sought to design a protocol to generate diatom lncRNA knockout mutants by CRISPR-Cas9 enabling subsequent functional studies to shed light into their mechanistic roles. Since lncRNAs do not contain open reading frames that can be targeted by point mut
- Europe PMC · Published · First archived
tRNA-derived second messengers confer bacterial immunity ↗
Bacterial small-molecule messengers that function in diverse immune signaling pathways have been thought to derive strictly from biosynthesis using nucleotide and cofactor substrates. Here we report a nuclease-driven immune signaling pathway in which tRNA cleavage generates a specific small molecule that triggers cell death in response to RNA-guided transcript recognition in prokaryotes. We identify a class of type VI-B CRISPR systems in which the RNA-guided nuclease Cas13 and its accessory transmembrane protein, 2TMβ, are co-encoded in an operon and are jointly required for bacteriophage defe
- Europe PMC · Published · First archived
Genome-scale mapping of plant transcription factor effector domains reveals conserved regulatory principles across eukaryotes ↗
Eukaryotic life spans species that diverged over a billion years ago, yet our molecular view of gene regulation remains heavily skewed toward Opisthokonta model systems, particularly yeast and humans. The degree to which the protein features governing transcriptional regulation are conserved across eukaryotes or have diversified within individual eukaryotic supergroups remains unresolved. To provide a distinct evolutionary reference point, we used a massively parallel reporter assay in plant cells to identify transcriptional effector domains and define their sequence constraints, measuring ~26
- Europe PMC · Published · First archived
Anvaya: phylogenomic analysis of chromosome fusion-and-mixing characters and detection of shared whole-genome duplication ↗
Chromosome-scale conservation of gene linkage (macrosynteny) provides phylogenetic characters largely independent of sequence data. Fusion of ancestral linkage groups, and especially the subsequent interspersion (mixing) of their genes, is argued to be effectively irreversible, and such synapomorphic events have been used to resolve deep, contentious nodes. I present Anvaya, a dependency-light, open-source toolkit of two Python programs with companion threshold-calibration tools which takes reciprocal-best-hit (RBH) synteny data directly to a phylogenetic analysis that codes fusion and mixing
- Europe PMC · Published · First archived
Kcs1-dependent inositol pyrophosphates promote DNA double-strand break repair via Pho80–Pho85 in budding yeast ↗
The cleavage of membrane-bound phosphoinositides produces inositol polyphosphates (IPs) and pyrophosphates (PP-IPs), small water-soluble signaling molecules that are highly conserved in eukaryotes and play a critical role in cell metabolism. Loss of the inositol pyrophosphate kinase (PP-IPk) Kcs1 and its mammalian ortholog IP6K1 was previously shown to cause hypersensitivity to genotoxic stress and reduced homologous recombination (HR) repair. To identify the mechanism linking PP-IPs to DNA double-strand break (DSB) repair, we combined quantitative proteomics with biochemical, genetic, and cel
- Europe PMC · Published · First archived
High-throughput in vivo DNA data encoding by multiplexed conjugation and orthogonal base editing ↗
Bacterial conjugation and CRISPR base editing offer complementary routes for programmable DNA transfer and heritable genomic writing, but their combined potential for information encoding in living cells remains unexplored. Here, we introduce CONCORD, a bacterial encoding platform that couples multiplexed bacterial conjugation to genomic base editing for synthesis-free in vivo DNA data writing. A recipient Writer strain expresses the base-editing machinery and is equipped with a writing template, whereas reusable donor Guide strains deliver the encoding sgRNA signals by conjugation. Using this
- Europe PMC · Published · First archived
MDS-causing mutations of ZRSR2 impair minor intron splicing by reducing its interaction with SF3B complex ↗
Minor introns are rare but evolutionarily conserved introns in the human genome. Defects in minor spliceosome components have been reported to cause several human diseases. Mutations in ZRSR2 are frequently observed in myelodysplastic syndrome (MDS) patients. However, the precise molecular mechanism by which these mutations cause a loss of ZRSR2 function in minor intron splicing remain elusive. In this study, we characterized the impact of MDS-causing missense mutations in ZRSR2. Most of the mutant ZRSR2 proteins we tested showed different subnuclear localization pattern from that of wild-type
- Europe PMC · Published · First archived
scPRIME-seq uncovers synchronized multimodal molecular collapse facilitated by pre-neoplastic epigenetic burden in prostate cancer ↗
Tumorigenesis involves alterations across the genome, epigenome and transcriptome, yet how these layers interact to drive malignant transformation remains unclear, largely due to the lack of scalable multimodal single-cell approaches. Here, we developed scPRIME-seq, a high-throughput platform for simultaneous single-cell profiling of transcriptome, genome and DNA methylome, and applied it to 436,908 cells from 29 prostate cancers and 15 benign tissues. This multimodal atlas resolved dynamic changes across 30 cell types and a unified tumorigenic trajectory. Integrated analysis revealed a cell-s
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How to assess evidence about Science
Check each original source for its methods, release status, limitations, and supporting data. A repository announcement, a preprint, and a published study provide different kinds of evidence. SYMTRI’s subject classification helps discovery; it does not independently validate the source’s claims.
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