Structure and topology of DWORF in bicelles by oriented solid-state NMR

Experimental Data Snapshot

  • Conformers Calculated: 5000 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


A kink in DWORF helical structure controls the activation of the sarcoplasmic reticulum Ca 2+ -ATPase.

Reddy, U.V.Weber, D.K.Wang, S.Larsen, E.K.Gopinath, T.De Simone, A.Robia, S.Veglia, G.

(2022) Structure 30: 360

  • DOI: https://doi.org/10.1016/j.str.2021.11.003
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    SERCA is a P-type ATPase embedded in the sarcoplasmic reticulum and plays a central role in muscle relaxation. SERCA's function is regulated by single-pass membrane proteins called regulins. Unlike other regulins, dwarf open reading frame (DWORF) expressed in cardiac muscle has a unique activating effect. Here, we determine the structure and topology of DWORF in lipid bilayers using a combination of oriented sample solid-state NMR spectroscopy and replica-averaged orientationally restrained molecular dynamics. We found that DWORF's structural topology consists of a dynamic N-terminal domain, an amphipathic juxtamembrane helix that crosses the lipid groups at an angle of 64°, and a transmembrane C-terminal helix with an angle of 32°. A kink induced by Pro15, unique to DWORF, separates the two helical domains. A single Pro15Ala mutant significantly decreases the kink and eliminates DWORF's activating effect on SERCA. Overall, our findings directly link DWORF's structural topology to its activating effect on SERCA.

  • Organizational Affiliation

    Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, 6-155 Jackson Hall, Minneapolis, MN 55455, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Sarcoplasmic/endoplasmic reticulum calcium ATPase regulator DWORF36Homo sapiensMutation(s): 0 
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P0DN84 (Homo sapiens)
Explore P0DN84 
Go to UniProtKB:  P0DN84
GTEx:  ENSG00000240045 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DN84
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Conformers Calculated: 5000 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesHL143816
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM64742

Revision History  (Full details and data files)

  • Version 1.0: 2021-06-30
    Type: Initial release
  • Version 1.1: 2021-12-22
    Changes: Database references
  • Version 1.2: 2022-03-16
    Changes: Database references
  • Version 1.3: 2023-06-14
    Changes: Other