ABSTRACT: Data files and supplementary data associated with the one-pot method. These files are the results of one-pot enrichment of both acetylated and succinylated peptides.
Project description:Protein post-translational modifications (PTMs) are of increasing interest in biomedical research, yet studies rarely examine more than one PTM. One barrier to multi-PTM studies is the time cost for both sample preparation and data acquisition, which scale linearly with the number of modifications. The most prohibitive requirement is often the need for large amounts of sample, which must be increased proportionally with the number of PTM enrichment steps. Here we describe a streamlined, quantitative label-free proteomic workflow – “one-pot” PTM enrichment – which enables comprehensive identification and quantification of peptides containing acetylated and succinylated lysine residues from a single sample containing as little as 1 mg mitochondria protein. Coupled with a label-free, data-independent acquisition (DIA), we identified and quantified 2235 acetylated and 2173 succinylated peptides with the one-pot method and show that peak areas are highly correlated between the one-pot and traditional single-PTM enrichments. The ‘one-pot’ method makes possible detection of multiple PTMs occurring on the same peptide, and we show that it can be used to make unique biological insights into PTM crosstalk. Compared to single-PTM enrichments, the one-pot workflow has equivalent reproducibility and enables direct assessment of PTM crosstalk from biological samples in less time from less tissue.
Project description:We present One-Tip, a lossless proteomics methodology that seamlessly combines swift, one-pot sample preparation with narrow-window data-independent acquisition mass spectrometric analysis. With simplest sample processing, One-Tip reproducibly identifies > 9,000 proteins from ~1000 cells and ~ 6,000 proteins in a single mouse zygote with a throughput of 40 samples-per-day. This easy-to-use method expands capabilities of proteomics research by enabling greater depth, scalability and throughput covering low to high input samples.
Project description:Glycosylation, including N-glycosylation and O-glycosylation is generally characterized and controlled as a critical quality attribute for therapeutic glycoproteins because glycans can impact protein-based drug product efficacy, half-life, stability, and safety. Analytical procedures to characterize N-glycans are relatively well-established, but the characterization of O-glycans is challenging due to the complex workflows and lack of enzymatic tools. Here we present a simplified chemoenzymatic method to simultaneously profile N- and O-glycans from the same sample using a one-pot format by mass spectrometry (MS). N-glycans were first released by PNGase F, followed by O-glycopeptide generation by Proteinase K, selective N-glycan reduction, and O-glycan release by β-elimination during permethylation of both N- and O- glycans. Glycan structural assignments, and determination of N- to O-glycan ratio was obtained from the one-pot mass spectra. The streamlined, one-pot method is an accurate and reproducible approach that will facilitate advanced characterizations for quality assessments of therapeutic glycoproteins.
Project description:Quantitative proteomic analysis of Myc-induced apoptosis in serum-deprived Rat1_Myc fibroblasts. Mitochondrial, chromatin, and soluble fractions analyzed. Original peptide data contained in Supplementary files. Keywords: proteomic, apoptosis, cell fractions
Project description:This SuperSeries is composed of the SubSeries listed below GSE248280 contains ChIP-Seq input (IN) and IP (IP) data. GSE248281 contains micro-C in the mcool format. N1 and N2 represent repeats 1 and 2. For ChIP, Merged represent the Merged IP Merged mcool files are in supplementary files of the serie GSE248280