Chemical activators of protein phosphatase-1 induce calcium release inside intact cells

Gregor Reither, Jayanta Chatterjee, Monique Beullens, Mathieu Bollen, Carsten Schultz, Maja Köhn

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


Summary Protein phosphatase-1 (PP1) is a major Ser/Thr phosphatase that is involved in numerous cellular processes. PP1-disrupting peptides (PDPs) are selective chemical tools used to study PP1. They generate catalytically active PP1 inside cells but do not bind to the closely related PP2A. Here, we show that PDPs also do not act directly on PP2B, thus demonstrating the selectivity of PDPs toward PP1. We present PDPs with different properties, enabling reversible versus permanent activation of PP1. We also show that Ca2+ spiking is an acute effect caused by PDP-induced activation of PP1. The Ca2+ is released from internal stores. Our data show that PDPs can be used as selective chemical genetics tools to study acute and long-term effects of PP1 activation in intact cells, and PDPs will therefore be valuable tools to study PP1 biology.

Original languageEnglish (US)
Pages (from-to)1179-1186
Number of pages8
JournalChemistry and Biology
Issue number9
StatePublished - Sep 19 2013
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Molecular Biology
  • Pharmacology
  • Drug Discovery
  • Clinical Biochemistry


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