title: Proteome-wide association studies identify biochemical modules associated with a wing-size phenotype in Drosophila melanogaster.
abstract: The manner by which genetic diversity within a population generates individual phenotypes is a fundamental question of biology. To advance the understanding of the genotype-phenotype relationships towards the level of biochemical processes, we perform a proteome-wide association study (PWAS) of a complex quantitative phenotype. We quantify the variation of wing imaginal disc proteomes in Drosophila genetic reference panel (DGRP) lines using SWATH mass spectrometry. In spite of the very large genetic variation (1/36 bp) between the lines, proteome variability is surprisingly small, indicating strong molecular resilience of protein expression patterns. Proteins associated with adult wing size form tight co-variation clusters that are enriched in fundamental biochemical processes. Wing size correlates with some basic metabolic functions, positively with glucose metabolism but negatively with mitochondrial respiration and not with ribosome biogenesis. Our study highlights the power of PWAS to filter functional variants from the large genetic variability in natural populations.
authors: Institute of Molecular Systems Biology, ETH Zurich, Wolfgang Pauli Strasse 16, Zürich 8093, Switzerland.
authors: Hirokazu
authors: H
authors: Okada
authors: Institute of Molecular Systems Biology, ETH Zurich, Wolfgang Pauli Strasse 16, Zürich 8093, Switzerland.
authors: H Alexander
authors: HA
authors: Ebhardt
authors: Institute of Molecular Systems Biology, ETH Zurich, Wolfgang Pauli Strasse 16, Zürich 8093, Switzerland.
authors: Sibylle Chantal
authors: SC
authors: Vonesch
authors: Institute of Molecular Systems Biology, ETH Zurich, Wolfgang Pauli Strasse 16, Zürich 8093, Switzerland.|Faculty of Science, University of Zurich, Zurich 8057, Switzerland.
authors: Ruedi
authors: R
authors: Aebersold
authors: Institute of Molecular Systems Biology, ETH Zurich, Wolfgang Pauli Strasse 16, Zürich 8093, Switzerland.|Faculty of Science, University of Zurich, Zurich 8057, Switzerland.
authors: Ernst
authors: E
authors: Hafen
mesh_terms: D000818:Animals; D029721:Drosophila Proteins / Q000235:genetics*; D004331:Drosophila melanogaster / Q000196:embryology* / Q000235:genetics*; D014644:Genetic Variation; D055106:Genome-Wide Association Study; D005947:Glucose / Q000378:metabolism; D060227:Imaginal Discs / Q000196:embryology* / Q000502:physiology; D008928:Mitochondria / Q000378:metabolism; D014921:Wings, Animal / Q000196:embryology / Q000502:physiology*
chemical_list: D029721:Drosophila Proteins; D005947:Glucose