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Updated: May 12, 2025
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Probing High-density Functional Protein Microarrays to Detect Protein-protein Interactions
Published on: August 2, 2015
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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
Summary
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.
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.
