The structural basis for phospholamban inhibition of the calcium pump in sarcoplasmic reticulum

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60 Scopus citations

Abstract

Background: Phospholamban (PLB) regulates sarco(endo)plasmic reticulum Ca2+-ATPase (SERCA) activity and is thus a key regulator of cardiac contractility. Results: We present the crystal structure of SERCA in complex with PLB at 2.8-A resolution. Conclusion: PLB stabilizes a divalent cation-free conformation of SERCA with collapsed Ca2+ binding sites. We call the structure E2-PLB. Significance: The E2-PLB structure explains how PLB decreases Ca2+ affinity and depresses cardiac contractility.

Original languageEnglish (US)
Pages (from-to)30181-30191
Number of pages11
JournalJournal of Biological Chemistry
Volume288
Issue number42
DOIs
StatePublished - Oct 18 2013

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

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