Cryo-EM structure of nucleotide-free MsbA reconstituted into peptidiscs, conformation 1

Experimental Data Snapshot

  • Resolution: 4.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


New approach for membrane protein reconstitution into peptidiscs and basis for their adaptability to different proteins.

Angiulli, G.Dhupar, H.S.Suzuki, H.Wason, I.S.Duong Van Hoa, F.Walz, T.

(2020) Elife 9

  • DOI: https://doi.org/10.7554/eLife.53530
  • Primary Citation of Related Structures:  
    6UZ2, 6UZH, 6UZL

  • PubMed Abstract: 

    Previously we introduced peptidiscs as an alternative to detergents to stabilize membrane proteins in solution (Carlson et al., 2018). Here, we present 'on-gradient' reconstitution, a new gentle approach for the reconstitution of labile membrane-protein complexes, and used it to reconstitute Rhodobacter sphaeroides reaction center complexes, demonstrating that peptidiscs can adapt to transmembrane domains of very different sizes and shapes. Using the conventional 'on-bead' approach, we reconstituted Escherichia coli proteins MsbA and MscS and find that peptidiscs stabilize them in their native conformation and allow for high-resolution structure determination by cryo-electron microscopy. The structures reveal that peptidisc peptides can arrange around transmembrane proteins differently, thus revealing the structural basis for why peptidiscs can stabilize such a large variety of membrane proteins. Together, our results establish the gentle and easy-to-use peptidiscs as a potentially universal alternative to detergents as a means to stabilize membrane proteins in solution for structural and functional studies.

  • Organizational Affiliation

    Laboratory of Molecular Electron Microscopy, Rockefeller University, New York, United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Lipid A export ATP-binding/permease protein MsbA
A, B
603Escherichia coliMutation(s): 0 
Membrane Entity: Yes 
Find proteins for P60752 (Escherichia coli (strain K12))
Explore P60752 
Go to UniProtKB:  P60752
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP60752
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 4.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-03-04
    Type: Initial release
  • Version 1.1: 2020-03-18
    Changes: Database references
  • Version 1.2: 2024-03-06
    Changes: Data collection, Database references