6OAB

Cdc48-Npl4 complex processing poly-ubiquitinated substrate in the presence of ADP-BeFx, state 2


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 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


Literature

Substrate processing by the Cdc48 ATPase complex is initiated by ubiquitin unfolding.

Twomey, E.C.Ji, Z.Wales, T.E.Bodnar, N.O.Ficarro, S.B.Marto, J.A.Engen, J.R.Rapoport, T.A.

(2019) Science 365

  • DOI: 10.1126/science.aax1033
  • Primary Citation of Related Structures:  
    6OAA, 6OAB, 6OA9

  • PubMed Abstract: 
  • The Cdc48 adenosine triphosphatase (ATPase) (p97 or valosin-containing protein in mammals) and its cofactor Ufd1/Npl4 extract polyubiquitinated proteins from membranes or macromolecular complexes for subsequent degradation by the proteasome. How Cdc48 pr ...

    The Cdc48 adenosine triphosphatase (ATPase) (p97 or valosin-containing protein in mammals) and its cofactor Ufd1/Npl4 extract polyubiquitinated proteins from membranes or macromolecular complexes for subsequent degradation by the proteasome. How Cdc48 processes its diverse and often well-folded substrates is unclear. Here, we report cryo-electron microscopy structures of the Cdc48 ATPase in complex with Ufd1/Npl4 and polyubiquitinated substrate. The structures show that the Cdc48 complex initiates substrate processing by unfolding a ubiquitin molecule. The unfolded ubiquitin molecule binds to Npl4 and projects its N-terminal segment through both hexameric ATPase rings. Pore loops of the second ring form a staircase that acts as a conveyer belt to move the polypeptide through the central pore. Inducing the unfolding of ubiquitin allows the Cdc48 ATPase complex to process a broad range of substrates.


    Organizational Affiliation

    Department of Cell Biology, Harvard Medical School, and Howard Hughes Medical Institute, 240 Longwood Avenue, Boston, MA 02115, USA. tom_rapoport@hms.harvard.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cell division control protein 48 ABCDE835Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: CDC48YDL126C
EC: 3.6.4.6
Find proteins for P25694 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P25694 
Go to UniProtKB:  P25694
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
poly(alanine) substrate H24Saccharomyces cerevisiaeMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Howard Hughes Medical Institute (HHMI)United States--
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01GM052586
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesT32GM007753

Revision History 

  • Version 1.0: 2019-07-03
    Type: Initial release
  • Version 1.1: 2019-07-10
    Changes: Data collection, Database references
  • Version 1.2: 2019-08-14
    Changes: Data collection, Database references
  • Version 1.3: 2019-11-20
    Changes: Author supporting evidence