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Phosphorylation of a nuclear condensate regulates cohesion and mRNA retention.
Nat Commun
January 2025
Department of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.
Nuclear speckles are membraneless organelles that associate with active transcription sites and participate in post-transcriptional mRNA processing. During the cell cycle, nuclear speckles dissolve following phosphorylation of their protein components. Here, we identify the PP1 family as the phosphatases that counteract kinase-mediated dissolution.
View Article and Find Full Text PDFSmall RNA sequencing analysis provides novel insights into microRNA-mediated regulation of defense responses in chickpea against Fusarium wilt infection.
Planta
January 2025
ICAR-National Institute for Plant Biotechnology, New Delhi, 110012, Delhi, India.
Small RNA sequencing analysis in two chickpea genotypes, JG 62 (Fusarium wilt-susceptible) and WR 315 (Fusarium wilt-resistant), under Fusarium wilt stress led to identification of 544 miRNAs which included 406 known and 138 novel miRNAs. A total of 115 miRNAs showed differential expression in both the genotypes across different combinations. A miRNA, Car-miR398 targeted copper chaperone for superoxide dismutase (CCS) that, in turn, regulated superoxide dismutase (SOD) activity during chickpea-Foc interaction.
View Article and Find Full Text PDFThe Vsr-like protein FASTKD4 regulates the stability and polyadenylation of the MT-ND3 mRNA.
Nucleic Acids Res
December 2024
The Kids Research Institute Australia, Northern Entrance, Perth Children's Hospital, 15 Hospital Avenue, Nedlands, Western Australia 6009, Australia.
Expression of the compact mitochondrial genome is regulated by nuclear encoded, mitochondrially localized RNA-binding proteins (RBPs). RBPs regulate the lifecycles of mitochondrial RNAs from transcription to degradation by mediating RNA processing, maturation, stability and translation. The Fas-activated serine/threonine kinase (FASTK) family of RBPs has been shown to regulate and fine-tune discrete aspects of mitochondrial gene expression.
View Article and Find Full Text PDFRNA-binding protein quaking: a multifunctional regulator in tumour progression.
Ann Med
December 2025
Department of Breast Surgery, Second Affiliated Hospital and Cancer Institute (Provincial Key Laboratory of Tumor Microenvironment and Immunotherapy, Key Laboratory of Cancer Prevention & Intervention, National Ministry of Education), Zhejiang University School of Medicine, Hangzhou, China.
Background: Quaking (QKI) is a member of the signal transduction and activators of RNA (STAR) family, performing a crucial multifunctional regulatory role in alternative splicing, mRNA precursor processing, mRNA transport and localization, mRNA stabilization, and translation during tumour progression. Abnormal QKI expression or fusion mutations lead to aberrant RNA and protein expression, thereby promoting tumour progression. However, in many types of tumour, QKI played a role as tumour suppressor, the regulatory role of QKI in tumour progression remains ambiguous.
View Article and Find Full Text PDFStatistical analysis supports pervasive RNA subcellular localization and alternative 3' UTR regulation.
Elife
December 2024
Department of Biochemistry Stanford University, Stanford, United States.
Targeted low-throughput studies have previously identified subcellular RNA localization as necessary for cellular functions including polarization, and translocation. Furthermore, these studies link localization to RNA isoform expression, especially 3' Untranslated Region (UTR) regulation. The recent introduction of genome-wide spatial transcriptomics techniques enables the potential to test if subcellular localization is regulated in situ pervasively.
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