CryoEM structure of SERCA2b WT in E1-2Ca2+-AMPPCP state.

Experimental Data Snapshot

  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Cryo-EM structures of SERCA2b reveal the mechanism of regulation by the luminal extension tail.

Zhang, Y.Inoue, M.Tsutsumi, A.Watanabe, S.Nishizawa, T.Nagata, K.Kikkawa, M.Inaba, K.

(2020) Sci Adv 6: eabb0147-eabb0147

  • DOI: https://doi.org/10.1126/sciadv.abb0147
  • Primary Citation of Related Structures:  
    6LLE, 6LLY, 6LN5, 6LN6, 6LN7, 6LN8, 6LN9

  • PubMed Abstract: 

    Sarco/endoplasmic reticulum Ca 2+ ATPase (SERCA) pumps Ca 2+ from the cytosol into the ER and maintains the cellular calcium homeostasis. Herein, we present cryo-electron microscopy (cryo-EM) structures of human SERCA2b in E1∙2Ca 2+ -adenylyl methylenediphosphonate (AMPPCP) and E2-BeF 3 - states at 2.9- and 2.8-Å resolutions, respectively. The structures revealed that the luminal extension tail (LE) characteristic of SERCA2b runs parallel to the lipid-water boundary near the luminal ends of transmembrane (TM) helices TM10 and TM7 and approaches the luminal loop flanked by TM7 and TM8. While the LE served to stabilize the cytosolic and TM domain arrangement of SERCA2b, deletion of the LE rendered the overall conformation resemble that of SERCA1a and SERCA2a and allowed multiple conformations. Thus, the LE appears to play a critical role in conformational regulation in SERCA2b, which likely explains the different kinetic properties of SERCA2b from those of other isoforms lacking the LE.

  • Organizational Affiliation

    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Sarcoplasmic/endoplasmic reticulum calcium ATPase 21,070Homo sapiensMutation(s): 0 
Gene Names: ATP2A2ATP2B
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P16615 (Homo sapiens)
Explore P16615 
Go to UniProtKB:  P16615
PHAROS:  P16615
GTEx:  ENSG00000174437 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP16615
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Ministry of Education, Culture, Sports, Science and Technology (Japan)Japan--

Revision History  (Full details and data files)

  • Version 1.0: 2020-08-26
    Type: Initial release
  • Version 1.1: 2020-09-09
    Changes: Database references
  • Version 1.2: 2020-09-16
    Changes: Database references
  • Version 1.3: 2024-03-27
    Changes: Data collection, Database references