Dataset Information

Validating pyAscore, A Python Package for the Localization of Protein Modifications

ABSTRACT: The submitted dataset contains results of validation experiments for pyAscore, an efficient and versatile implementation of the Ascore algorithm in Python for scoring the localization of user defined PTMs in data dependent mass spectrometry. In order to test the versatility of the package, three samples from three pride accessions were re-analyzed: label-free phosphoprotome samples were downloaded from PXD007740, TMT-labeled phosphoproteome samples were downloaded from PXD007145, and label free acetylome samples were downloaded from MSV000079068. We also wanted to evaluate the performance of pyAscore's PTM localizations on data where the modification site of peptides was known. Thus, we downloaded and re-analyzed synthetic phosphopeptide samples which were analyzed with 3 different fragmentation approaches: HCD and ETD synthetic phosphopeptide data were downloaded from PXD000138 and CID data were downloaded from PXD000759.

INSTRUMENT(S): Orbitrap Fusion Lumos, LTQ Orbitrap Velos, LTQ Orbitrap Elite, Q Exactive

ORGANISM(S): Homo Sapiens (human)

SUBMITTER: Anthony Barente

LAB HEAD: Judit Villén

PROVIDER: PXD032908 | Pride | 2022-10-31

REPOSITORIES: Pride

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Project description:Dramatic changes of gene expressions are known to occur in human endometrial stromal cells (ESC) during decidualization. The changes in gene expression are associated with changes of chromatin structure, which are regulated by epigenetic mechanisms such as histone modifications. Here, we investigated genome-wide changes in histone modifications and mRNA expressions associated with decidualization in human ESC using chromatin immunoprecipitation (ChIP) combined with next-generation sequencing. ESC were incubated with estradiol and medroxyprogesterone acetate for 14 days to induce decidualization. The ChIP-sequence data showed that induction of decidualization increased H3K27ac and H3K4me3 signals in many genomic regions but decreased in only a few regions. Most (80%) of the H3K27ac-increased regions and half of the H3K4me3-increased regions were located in the distal promoter regions (more than 3 kb upstream or downstream of the transcription start site). RNA-sequence showed that induction of decidualization up-regulated 881 genes, 223 of which had H3K27ac- or H3K4me3-increased regions in the proximal and distal promoter regions. Induction of decidualization increased the mRNA levels of these genes more than it increased the mRNA levels of genes without H3K27ac- or H3K4me3-increased regions. Pathway analysis revealed that up-regulated genes with the H3K27ac- or H3K4me3-increased regions were associated with insulin signaling. These results show that histone modification statuses genome-widely change in human ESC by induction of decidualization. The main changes of histone modifications are increases of H3K27ac and H3K4me3 in both the proximal and distal promoter regions, which are involved in the up-regulation of gene expression that occurs during decidualization. Examination of 4 different histone modifications in human endometrial stromal cells with or without EP inductions for 2 individuals. (EP induction: induction with estradiol (10-8 M) and medroxyprogesterone acetate (10-6 M))

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Validating pyAscore, A Python Package for the Localization of Protein Modifications

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