Chromatin loosening by poly(ADP)-ribose polymerase (PARP) at Drosophila puff loci - PubMed

Affiliations

• PMID: 12543974
• DOI: 10.1126/science.1078764

Chromatin loosening by poly(ADP)-ribose polymerase (PARP) at Drosophila puff loci

Alexei Tulin et al. Science. 2003.

Abstract

Steroid response and stress-activated genes such as hsp70 undergo puffing in Drosophila larval salivary glands, a local loosening of polytene chromatin structure associated with gene induction. We find that puffs acquire elevated levels of adenosine diphosphate (ADP)-ribose modified proteins and that poly(ADP)-ribose polymerase (PARP) is required to produce normal-sized puffs and normal amounts of Hsp70 after heat exposure. We propose that chromosomal PARP molecules become activated by developmental or environmental cues and strip nearby chromatin proteins off DNA to generate a puff. Such local loosening may facilitate transcription and may transiently make protein complexes more accessible to modification, promoting chromatin remodeling during development.

Comment in

• Transcription. Puffing with PARP.

  Pirrotta V. Pirrotta V. Science. 2003 Jan 24;299(5606):528-9. doi: 10.1126/science.1081520. Science. 2003. PMID: 12543962 No abstract available.

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