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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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Updated: May 12, 2025

Probing High-density Functional Protein Microarrays to Detect Protein-protein Interactions
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Proteome-wide microarray-based screening of PAR-binding proteins.

Bong Gu Kang1,2, Sung-Ung Kang1,2, Jae Jin Kim3,4

  • 1Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Johns Hopkins University School of Medicine, Baltimore, MD 21205, United States.

Nucleic Acids Research
|April 16, 2025
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Summary
This summary is machine-generated.

Researchers identified 356 proteins that bind to Poly (ADP-ribose) (PAR), revealing its broad role in cellular signaling beyond DNA repair. This discovery expands our understanding of PARylation in diverse biological processes.

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Area of Science:

  • Molecular Biology
  • Cellular Signaling

Background:

  • Poly (ADP-ribose) (PAR) is vital for intracellular signaling and protein scaffolding.
  • Its role is primarily understood through covalent modification, while non-covalent interactions remain less characterized.

Purpose of the Study:

  • To comprehensively characterize the non-covalent PAR-binding proteome (PARylome).
  • To identify proteins interacting with PAR through non-covalent means.

Main Methods:

  • Utilized a human protein microarray covering a significant portion of the human proteome.
  • Performed a high-throughput PAR-binding screen.

Main Results:

  • Identified 356 distinct PAR-binding proteins.
  • Demonstrated that PAR binding influences a wide array of biological processes, including signaling, transcription, and enzymatic activity.
  • Highlighted potential roles in regulating signaling molecules, transcription factors, nucleic acid binding proteins, and various enzyme classes.

Conclusions:

  • The non-covalent PARylome is extensive and regulates diverse cellular functions beyond DNA damage response.
  • The established database of PAR-binding proteins serves as a resource for investigating PARylation's role in various biological contexts.