ReDD: RNA editing detection by direct RNA sequencing and deep learning
Ontology highlight
ABSTRACT: Many previous studies, including the Next Generation Sequencing (NGS)-based ones, have shown the critical roles of RNA editing in biomedicine. Direct RNA sequencing emerges as another powerful technique to advance the understanding of RNA editing by new paradigms, especially in single-molecule and long-range characterization. The urgent gap is the accurate and robust identification of RNA editing at the single-molecule and single-nucleotide resolution from direct RNA sequencing. This is challenging due to the inherent nature of the context-dependence on the raw signals, which requires enormous training data with considerable diversity. Here we propose two coupled measures to address them: 1) an abductive deep learning strategy implemented as the software ReDD fully utilizes the widely accessible NGS-based RNA editing data as indirect labels of direct RNA sequencing to achieve the detection at the single-molecule level; 2) a cloud-based platform Argo-ReDD serves as a central database for assembling large and diverse data from the community to continuously train the abductive deep learning model, which also meets the community demand of a user-friendly way to perform RNA editing analyses, such as co-occurrence analysis, quantitative analysis and gene isoform-resolved analysis, based on the specific information from direct RNA sequencing.
Project description:Most proteogenomic approaches for mapping single amino acid polymorphisms (SAPs) require construction of a sample-specific database containing protein variants predicted from the next-generation sequencing (NGS) data. We present a new strategy for direct SAP detection without relying on NGS data. Among the 348 putative SAP peptides identified in an industrial yeast strain, 85.6% of SAP sites were validated by genomic sequencing.
Project description:In this study, we performed a comparative analysis of gut microbiota composition and gut microbiome-derived bacterial extracellular vesicles (bEVs) isolated from patients with solid tumours and healthy controls. After isolating bEVs from the faeces of solid tumour patients and healthy controls, we performed spectrometry analysis of their proteomes and next-generation sequencing (NGS) of the 16S gene. We also investigated the gut microbiomes of faeces from patientsand controls using 16S rRNA sequencing. Machine learning was used to classify the samples into patients and controls based on their bEVs and faecal microbiomes.
2024-08-08 | PXD047510 | Pride
Project description:DeepEdit: single-molecule detection and phasing of A-to-I RNA editing events using Nanopore direct RNA sequencing
Project description:We used CRISPR KI technology to mutagenize the cis-regulatory elements including the editing stem and the editing complementary sequence of three RNA editing substrates-NEIL1, TTYH2, AJUBA. We designed single nucleotide variants, double-nucleotide variants and other mutant isoforms to interrogate the primary sequence and the secondary structures around the endogenous RNA editing sites. Gene specific primers were used to make the NGS library for each locus. The unique mutation of each tested isoform can be used as barcode and RNA editing level can be measured for each isoform from the pooled library. We found that RNA sequence and structure features synergistically determine the editing levels. Several features, such as mutation number, free energy, and probability of active conformation, play an important role in determining editing efficiency. This study systematically investigated the contribution of cis-regulatory elements to ADAR1 RNA editing by combining CRISPR-based saturation mutagenesis and deep sequencing technology.
Project description:We report the the first single-molecule-based NGS analysis of chromatin regions that co-immunoprecipitate with Rio1 in the yeast Saccharomyces cerevisiae.
Project description:To shed light on the parasiticidal mechanisms of L2090314, we have adapted a workflow which combines a forward genetic approach based on transcriptome sequencing, computational mutation discovery, and CRISPR/Cas9 genome editing in Toxoplasma gondii. Drug-resistant parasites were generated by chemical random mutagenesis. Multiple independent resistant lines were isolated. Single nucleotide variations (SNVs) were identified based on NGS transcriptomic analysis. By focusing on mutations present in coding sequences, we identified a single gene, TgGSK3, that harbored SNVs leading to amino acid substitutions in the 8 drug-resistant lines obtained that were not present in the parental strain. Finally, using CRISPR/Cas9 genome editing we confirmed that the mutations identified confer resistance against LY2090314.
Project description:To shed light on the parasiticidal mechanisms of L35, we have adapted a workflow which combines a forward genetic approach based on transcriptome sequencing, computational mutation discovery, and CRISPR/Cas9 genome editing in Toxoplasma gondii. Drug-resistant parasites were generated by chemical random mutagenesis. Multiple independent resistant lines were isolated. Single nucleotide variations (SNVs) were identified based on NGS transcriptomic analysis. By focusing on mutations present in coding sequences, we identified a single gene, TgPRS, that harbored SNVs leading to amino acid substitutions in the 6 drug-resistant lines obtained that were not present in the parental strain. Finally, using CRISPR/Cas9 genome editing we confirmed that the mutations identified confer resistance against L35.
Project description:Purpose: To shed light on the parasiticidal mechanisms of Altiratinib, we have adapted a workflow which combines a forward genetic approach based on transcriptome sequencing, computational mutation discovery and CRISPR/Cas9 genome editing in Toxoplasma gondii. Drug-resistant parasites were generated by chemical random mutagenesis. Multiple independent resistant lines were isolated. Single nucleotide variations (SNVs) were identified based on NGS transcriptomic analysis. By focusing on mutations present in coding sequences, we identified a single gene, TgPRP4K, that harbored SNVs leading to amino acid substitutions in 5 out of the 6 drug-resistant lines that were not present in the parental strain. Finally, using CRISPR/Cas9 genome editing we confirmed that the mutations identified confer resistance against Altiratinib.
Project description:Purpose: To shed light on the parasiticidal mechanisms of AN13762, we have adapted an original workflow which combines a forward genetic approach based on transcriptome sequencing, computational mutation discovery and CRISPR/Cas9 genome editing in Toxoplasma gondii. Drug-resistant parasites were generated by chemical random mutagenesis. Multiple independent resistant lines were isolated. Single nucleotide variations (SNVs) were identified based on NGS transcriptomic analysis. By focusing on mutations present in coding sequences, we identified a single gene, TgCPSF3, that harbored SNVs leading to amino acid substitutions in each of the 7 drug-resistant lines that were not present in the parental strain. Finally, using CRISPR/Cas9 genome editing we confirmed that the mutations identified confer resistance against AN13762.