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Quantitative Proteomics Identifies Profilin-1 as a Pseudouridine-Binding Protein.
J Am Chem Soc
January 2025
Department of Chemistry, University of California, Riverside, California 92521-0403, United States.
Pseudouridine (Ψ) is the most abundant RNA modification in nature; however, not much is known about the biological functions of this modified nucleoside. Employing an unbiased quantitative proteomics method, we identified multiple candidate reader proteins of Ψ in RNA, including a cytoskeletal protein profilin-1 (PFN1). We demonstrated that PFN1 binds directly and selectively to Ψ-containing RNA.
View Article and Find Full Text PDFWe report the first implementation of ion mobility mass spectrometry combined with an ultra-high throughput sample introduction technology for high throughput screening (HTS). The system integrates differential ion mobility (DMS) with acoustic ejection mass spectrometry (AEMS), termed DAEMS, enabling the simultaneous quantitation of structural isomers that are the sub-strates and products of isomerase mediated reactions in intermediary metabolism. We demonstrate this potential by comparing DAEMS to a luminescence assay for the isoform of phosphoglycerate mutase (iPGM) distinctively present in pathogens offering an opportunity as a drug target for a variety of microbial and parasite borne diseases.
View Article and Find Full Text PDFGenome-scale modeling identifies dynamic metabolic vulnerabilities during the epithelial to mesenchymal transition.
Commun Biol
December 2024
Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA.
Epithelial-to-mesenchymal transition (EMT) is a conserved cellular process critical for embryogenesis, wound healing, and cancer metastasis. During EMT, cells undergo large-scale metabolic reprogramming that supports multiple functional phenotypes including migration, invasion, survival, chemo-resistance and stemness. However, the extent of metabolic network rewiring during EMT is unclear.
View Article and Find Full Text PDFInterplay between tobacco curly shoot virus vsiRNA24 and triosephosphate isomerase: implications for Nicotiana benthamiana viral defense.
New Phytol
December 2024
Chongqing Key Laboratory of Plant Disease Biology, College of Plant Protection, Southwest University, Chongqing, 400715, China.
Virus-derived small interfering RNAs (vsiRNAs) play an important role in viral infection by regulating the expression of host genes. At present, research on the regulation of plant primary metabolic pathways by vsiRNAs is very limited. TvsiRNA24 derived from tobacco curly shoot virus (TbCSV) was amplified by reverse transcription polymerase chain reaction, and its target gene NbTPI (triosephosphate isomerase) was verified using reverse transcription quantitative polymerase chain reaction and GFP fluorescence observation.
View Article and Find Full Text PDFDifferential Mobility Spectrometry Acoustic Ejection Mass Spectrometer System for Screening Isomerization-Mediating Enzyme Drug Targets.
Anal Chem
December 2024
SCIEX, Concord, Ontario L4K 4V8, Canada.
We report the first implementation of ion mobility mass spectrometry combined with an ultrahigh throughput sample introduction technology for high-throughput screening (HTS). The system integrates differential mobility spectrometry (DMS) with acoustic ejection mass spectrometry (AEMS), termed DAEMS, enabling the simultaneous quantitation of structural isomers that are the substrates and products of isomerase-mediated reactions in intermediary metabolism. We demonstrate this potential by comparing DAEMS to a luminescence assay for the isoform of phosphoglycerate mutase (iPGM) distinctively present in pathogens, offering an opportunity as a drug target for a variety of microbial and parasite borne diseases.
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