ArticleNature communications2026
PARP1-HPF1 structure and dynamics on nicked DNA suggest a mechanism for acute and localized ADP-ribosylation.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Structural basis of PARP2 recognition of nucleosomal DNA breaks and inhibitor trapping.Nucleic acids research · 2026Article
- The BRCT domain enhances DNA binding and catalytic efficiency of fungal PARPs.Nature communications · 2026Article
- PARP1 Exhibits an Enzymatically Inactive Chromatin Binding Mode.bioRxiv : the preprint server for biology · 2026Article
- Comprehensive metabolomic profiling of Egyptian Salvia species reveals promising leads for chemopreventive and anti-inflammatory drug development: In vitro and In silico study.Scientific reports · 2026Article
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9 authors.
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Abstract
PARP1 detection of DNA strand breaks allosterically leads to PARP1 synthesis of poly(ADP-ribose) modifications that signal DNA damage. HPF1 engages activated PARP1 to control modification site selection. Understanding of the mechanism of DNA break detection and catalytic activation is incomplete, due largely to limited structural information for full-length PARP1. Here, single-particle cryo-EM provides views of the full complement of PARP1 domains engaging a DNA single-strand break in the presence of HPF1 and a fragment of binding partner Timeless. Cryo-EM, single-molecule DNA dynamics, and small-angle X-ray scattering analysis indicate that PARP1 remains dynamic even when the multi-domain structure is organized on a DNA break, with the minimal catalytic region displaying high mobility relative to domains engaging damage. We propose that the organization of PARP1 domains on a DNA break releases a tethered, constitutively active catalytic region to modify molecules in a radius surrounding the DNA break site.
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