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Combined Nucleotide and Protein Extractions in Caenorhabditis elegans
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Natural Genetic Variation Influences Protein Abundances in C. elegans Developmental Signalling Pathways.

Kapil Dev Singh1, Bernd Roschitzki2, L Basten Snoek3

  • 1Institute of Molecular Life Sciences, University of Zurich, Zurich, Switzerland.

Plos One
|March 18, 2016
PubMed
Summary
This summary is machine-generated.

Natural genetic variation significantly impacts gene expression in Caenorhabditis elegans signalling pathways. This study reveals how differences in DNA affect protein levels, influencing development and disease progression.

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Area of Science:

  • Genetics and Molecular Biology
  • Developmental Biology
  • Systems Biology

Background:

  • Complex traits and diseases involve multiple genes acting in various pathways.
  • Signalling pathways like apoptosis, MAPK, Notch, and Wnt are crucial for development and disease.
  • Understanding how genetic variations affect gene expression at the translational level is limited.

Purpose of the Study:

  • To investigate the impact of natural genetic variation on transcript and protein abundance in key developmental signalling pathways.
  • To identify quantitative trait loci (QTLs) associated with protein abundance variations.
  • To link genetic variation to phenotypic changes in signaling pathways.

Main Methods:

  • Utilized recombinant inbred lines (RILs) from contrasting wild-type Caenorhabditis elegans strains (N2 and CB4856).
  • Employed selected reaction monitoring (SRM) mass spectrometry to quantify protein abundance in four key pathways.
  • Performed quantitative trait locus (QTL) mapping to identify genetic loci influencing protein levels.

Main Results:

  • Approximately 50% of the 44 tested genes showed statistically significant changes in protein abundance across different strains, though most changes were minor (<1.3-fold).
  • Identified a QTL on chromosome II affecting the abundance of the phosphatidylserine receptor protein (PSR-1).
  • Detected two distinct QTLs on chromosome IV associated with embryonic and radiation-induced apoptosis.

Conclusions:

  • Natural genetic variation in C. elegans is sufficient to induce significant alterations in developmental signalling pathways.
  • These variations affect both gene expression (transcript and protein levels) and observable phenotypes.
  • The study provides insights into the genetic basis of complex traits and disease-related pathways.