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An ultra-conserved poison exon in the Tra2b gene encoding a splicing activator is essential for male fertility and meiotic cell division.
EMBO J
January 2025
Newcastle University Biosciences Institute (NUBI), Central Parkway, Newcastle University, NE1 3BZ, Newcastle upon Tyne, UK.
The cellular concentrations of splicing factors (SFs) are critical for controlling alternative splicing. Most serine and arginine-enriched (SR) protein SFs regulate their own concentration via a homeostatic feedback mechanism that involves regulation of inclusion of non-coding 'poison exons' (PEs) that target transcripts for nonsense-mediated decay. The importance of SR protein PE splicing during animal development is largely unknown despite PE ultra-conservation across animal genomes.
View Article and Find Full Text PDFElucidation of intragenomic variation of ribosomal DNA sequences in the enigmatic fungal genus Ceraceosorus, including a newly described species Ceraceosorus americanus.
IMA Fungus
December 2024
Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN, USA.
Multicopy nuclear ribosomal DNA (rDNA) genes have been used as markers for fungal identification for three decades. The rDNA sequences in a genome are thought to be homogeneous due to concerted evolution. However, intragenomic variation of rDNA sequences has recently been observed in many fungi, which may make fungal identification and species abundance estimation based on these loci problematic.
View Article and Find Full Text PDFXII International Mycological Congress: report of Congress action on nomenclature proposals relating to fungi.
IMA Fungus
November 2024
Department of Botany & Plant Pathology, Oregon State University, Corvallis, OR, 97333, USA.
Procedures, appointments and outcomes of the Fungal Nomenclature Session (FNS) of the XII International Mycological Congress (IMC12) are summarized, including the composition of the Fungal Nomenclature Bureau and the Nominating Committee of the IMC. Between 124 and 322 mycologists attended the three sessions of the FNS, at which formal proposals to amend Chapter F of the International Code of Nomenclature for algae, fungi, and plants were debated. The 15 proposals considered included eight "from the floor", five of which were withdrawn prior to the FNS.
View Article and Find Full Text PDFDiffuse pediatric high-grade glioma of methylation-based RTK2A and RTK2B subclasses present distinct radiological and histomolecular features including Gliomatosis cerebri phenotype.
Acta Neuropathol Commun
November 2024
Department of Neuropathology, GHU Paris-Psychiatrie et Neurosciences, Sainte-Anne Hospital, 1, Rue Cabanis, 75014, Paris, France.
Diffuse pediatric-type high-grade gliomas (pedHGG), H3- and IDH-wildtype, encompass three main DNA-methylation-based subtypes: pedHGG-MYCN, pedHGG-RTK1A/B/C, and pedHGG-RTK2A/B. Since their first description in 2017 tumors of pedHGG-RTK2A/B have not been comprehensively characterized and clinical correlates remain elusive. In a recent series of pedHGG with a Gliomatosis cerebri (GC) growth pattern, an increased incidence of pedHGG-RTK2A/B (n = 18) was observed.
View Article and Find Full Text PDFComparative mitochondrial genomics of Thelebolaceae in Antarctica: insights into their extremophilic adaptations and evolutionary dynamics.
IMA Fungus
October 2024
China Pharmaceutical Culture Collection, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, 100050, People's Republic of China.
Species of Antarctomyces and Thelebolus (Thelebolaceae), primarily found in Antarctic environments, exhibit psychrophilic adaptations, yet their mitochondrial genomes have not been extensively studied. Furthermore, few studies have compared the mitochondrial genomes of psychrophilic, psychrotrophic, and mesophilic fungi. After successful sequencing and assembly, this study annotated the mitochondrial genomes of Antarctomyces psychrotrophicus CPCC 401038 and Thelebolus microsporus CPCC 401041.
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