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Related Concept Videos

Proteomics01:33

Proteomics

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A proteome is the entire set of proteins that a cell type produces. We can study proteomes using the knowledge of genomes because genes code for mRNAs, and the mRNAs encode proteins. Although mRNA analysis is a step in the right direction, not all mRNAs are translated into proteins.
Proteomics is the study of proteomes' function. It involves the large-scale systematic study of the proteome to denote the protein complement expressed by a genome. Scientist Mark Wilkins coined the term...
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Integrated Transcriptomic-Proteomic Analysis Using a Proteogenomic Workflow Refines Rat Genome Annotation.

Dhirendra Kumar1, Amit Kumar Yadav1, Xinying Jia2

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Summary
This summary is machine-generated.

We discovered 363 novel peptides in rat brain microglia, identifying 249 new protein forms (proteoforms) and improving proteogenomic analysis for disease research.

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Area of Science:

  • Proteomics
  • Genomics
  • Bioinformatics
  • Molecular Biology

Background:

  • Detecting novel protein forms (proteoforms) from mass spectrometry proteomics data is challenging.
  • Proteogenomic re-annotation and mRNA splicing data are crucial for identifying diverse proteoforms in model organisms.
  • Rats are important model organisms for studying human diseases, including neurological, cardiovascular, and oncological conditions.

Purpose of the Study:

  • To develop and utilize an automated proteogenomic analysis pipeline for discovering novel proteoforms in the rat.
  • To identify novel peptides and proteoforms in rat brain microglia using integrated transcriptomic and proteomic data.
  • To enhance the reference proteome for rat, facilitating improved human disease studies.

Main Methods:

  • Development of EuGenoSuite, an open-source proteomic search tool.
  • Implementation of an in-house integrated transcriptomic-proteomic pipeline for automated analysis.
  • Comparative analysis of four proteogenomic pipelines (integrated, Peppy, Enosi, ProteoAnnotator) using public RNA-sequence and mass spectrometry proteomics data.

Main Results:

  • Discovery of 363 novel peptides in rat brain microglia, representing novel proteoforms for 249 gene loci.
  • Identification of novel exons, translation of untranslated regions, pseudogenes, and splice variants.
  • Identification of novel isoforms for genes associated with neurological disorders (e.g., schizophrenia, ALS), cardiovascular diseases, and breast cancer.

Conclusions:

  • The developed pipeline and EuGenoSuite enable efficient discovery of novel proteoforms.
  • The findings provide an improved proteomic reference for rats, crucial for modeling human diseases.
  • This integrative multi-omics approach advances our understanding of proteome diversity and its role in disease.