Structure-function analysis has revealed the mechanism of yeast RNA polymerase II transcription at 8-oxoguanine (8-oxoG), the major DNA lesion resulting from oxidative stress. When polymerase II encounters 8-oxoG in the DNA template strand, it can misincorporate adenine, which forms a Hoogsteen bp with 8-oxoG at the active center. This requires rotation of the 8-oxoG base from the standard anti- to an uncommon syn-conformation, which likely occurs during 8-oxoG loading into the active site. The misincorporated adenine escapes intrinsic proofreading, resulting in transcriptional mutagenesis that is observed directly by mass spectrometric RNA analysis.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2797236 | PMC |
| http://dx.doi.org/10.1074/jbc.M109.022764 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Inhibition of BRD4 attenuated IFNγ-induced apoptosis in colorectal cancer organoids.
BMC Cancer
January 2025
Laboratory of Molecular Genetics, National Cancer Center Research Institute, Tokyo, Japan.
Background: This study aimed to analyze the functional role of Brd4 in colorectal cancer (CRC) organoids. Brd4 was identified as a CRC-related gene by our previous Sleeping Beauty mutagenesis transposon screening in mice. Brd4 is a transcriptional regulator that recognizes acetylated histones and is known to be involved in inflammatory responses.
View Article and Find Full Text PDFSRF and CBP jointly regulate integrin β6 overexpression in head and neck squamous cell carcinomas.
Cell Signal
January 2025
Department of Basic Medical Science & Department of Stomatology, School of Medicine, Xiamen University, Xiamen, Fujian, China. Electronic address:
Overexpression of integrin β6 (ITGB6) is crucially linked to the invasion and metastasis of head and neck squamous cell carcinoma (HNSCC). The molecular mechanisms driving ITGB6 upregulation in HNSCC are not well understood. Our study comprehensively analyzed the transcriptional regulation and epigenetic modification mechanisms affecting ITGB6 transcription.
View Article and Find Full Text PDFSystematic identification of Y-chromosome gene functions in mouse spermatogenesis.
Science
January 2025
Sex Chromosome Biology Laboratory, The Francis Crick Institute, London, UK.
The mammalian Y chromosome is essential for male fertility, but which Y genes regulate spermatogenesis is unresolved. We addressed this by generating 13 Y-deletant mouse models. In , , and deletants, spermatogenesis was impaired.
View Article and Find Full Text PDFKlebsiella pneumoniae employs a type VI secretion system to overcome microbiota-mediated colonization resistance.
Nat Commun
January 2025
Department of Microbiology and Immunology, Wake Forest School of Medicine, Winston Salem, NC, USA.
Microbial species must compete for space and nutrients to persist in the gastrointestinal (GI) tract, and our understanding of the complex pathobiont-microbiota interactions is far from complete. Klebsiella pneumoniae, a problematic, often drug-resistant nosocomial pathogen, can colonize the GI tract asymptomatically, serving as an infection reservoir. To provide insight on how K.
View Article and Find Full Text PDFIntroduction: Tat protein is a trans-activator of HIV-1 genome transcription, with additional functions including the ability to induce the chronic inflammatory process. Natural amino acid polymorphisms in Tat may affect its functional properties and the course of HIV infection. The aim of this work is to analyze the marks of Tat consensus sequences in non-A6 HIV-1 variants characteristic of the Russian Federation, as well as study natural polymorphisms in Tat CRF63_02A6 and subtype B variants circulating in Russia.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!