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Science. 2015 Mar 6;347(6226):1259038. doi: 10.1126/science.1259038. Epub 2015 Feb 12.

Immunogenetics. Dynamic profiling of the protein life cycle in response to pathogens.

Author information

  • 1The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA.
  • 2The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA. Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
  • 3The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA. Harvard Faculty of Arts and Sciences Center for Systems Biology, Harvard University, Cambridge, MA 02138, USA.
  • 4Department of Cellular and Molecular Pharmacology, California Institute for Quantitative Biomedical Research, University of California, San Francisco, San Francisco, CA 94158, USA.
  • 5The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA. Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA 02114, USA.
  • 6Department of Cellular and Molecular Pharmacology, California Institute for Quantitative Biomedical Research, University of California, San Francisco, San Francisco, CA 94158, USA. Howard Hughes Medical Institute (HHMI), University of California, San Francisco, San Francisco, CA 94158, USA.
  • 7The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA. Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital, Boston, MA 02114, USA. Harvard Medical School, Boston, MA 02115, USA. aregev@broad.mit.edu nhacohen@mgh.harvard.edu.
  • 8The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA. Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02140, USA. HHMI, Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02140, USA. aregev@broad.mit.edu nhacohen@mgh.harvard.edu.

Abstract

Protein expression is regulated by the production and degradation of messenger RNAs (mRNAs) and proteins, but their specific relationships remain unknown. We combine measurements of protein production and degradation and mRNA dynamics so as to build a quantitative genomic model of the differential regulation of gene expression in lipopolysaccharide-stimulated mouse dendritic cells. Changes in mRNA abundance play a dominant role in determining most dynamic fold changes in protein levels. Conversely, the preexisting proteome of proteins performing basic cellular functions is remodeled primarily through changes in protein production or degradation, accounting for more than half of the absolute change in protein molecules in the cell. Thus, the proteome is regulated by transcriptional induction for newly activated cellular functions and by protein life-cycle changes for remodeling of preexisting functions.

Copyright © 2015, American Association for the Advancement of Science.

PMID:
25745177
[PubMed - indexed for MEDLINE]
PMCID:
PMC4506746
Free PMC Article
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