8T7U

ADP-bound Bcs1 (unsymmetrized)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.74 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Conformations of Bcs1L undergoing ATP hydrolysis suggest a concerted translocation mechanism for folded iron-sulfur protein substrate.

Zhan, J.Zeher, A.Huang, R.Tang, W.K.Jenkins, L.M.Xia, D.

(2024) Nat Commun 15: 4655-4655

  • DOI: https://doi.org/10.1038/s41467-024-49029-y
  • Primary Citation of Related Structures:  
    8T14, 8T5U, 8T7U, 8TBY, 8TI0, 8TP1, 8TPL

  • PubMed Abstract: 

    The human AAA-ATPase Bcs1L translocates the fully assembled Rieske iron-sulfur protein (ISP) precursor across the mitochondrial inner membrane, enabling respiratory Complex III assembly. Exactly how the folded substrate is bound to and released from Bcs1L has been unclear, and there has been ongoing debate as to whether subunits of Bcs1L act in sequence or in unison hydrolyzing ATP when moving the protein cargo. Here, we captured Bcs1L conformations by cryo-EM during active ATP hydrolysis in the presence or absence of ISP substrate. In contrast to the threading mechanism widely employed by AAA proteins in substrate translocation, subunits of Bcs1L alternate uniformly between ATP and ADP conformations without detectable intermediates that have different, co-existing nucleotide states, indicating that the subunits act in concert. We further show that the ISP can be trapped by Bcs1 when its subunits are all in the ADP-bound state, which we propose to be released in the apo form.


  • Organizational Affiliation

    Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, 20892, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Mitochondrial chaperone BCS1424Mus musculusMutation(s): 0 
Gene Names: Bcs1l
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9CZP5 (Mus musculus)
Explore Q9CZP5 
Go to UniProtKB:  Q9CZP5
IMPC:  MGI:1914071
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9CZP5
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.74 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX1.20.1
RECONSTRUCTIONcryoSPARC

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Cancer Institute (NIH/NCI)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2024-06-05
    Type: Initial release
  • Version 1.1: 2024-06-12
    Changes: Database references