6QPQ

The structure of the cohesin head module elucidates the mechanism of ring opening


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The structure of the cohesin ATPase elucidates the mechanism of SMC-kleisin ring opening.

Muir, K.W.Li, Y.Weis, F.Panne, D.

(2020) Nat Struct Mol Biol 27: 233-239

  • DOI: 10.1038/s41594-020-0379-7
  • Primary Citation of Related Structures:  
    6QPQ, 6QPW

  • PubMed Abstract: 
  • Genome regulation requires control of chromosome organization by SMC-kleisin complexes. The cohesin complex contains the Smc1 and Smc3 subunits that associate with the kleisin Scc1 to form a ring-shaped complex that can topologically engage chromatin to ...

    Genome regulation requires control of chromosome organization by SMC-kleisin complexes. The cohesin complex contains the Smc1 and Smc3 subunits that associate with the kleisin Scc1 to form a ring-shaped complex that can topologically engage chromatin to regulate chromatin structure. Release from chromatin involves opening of the ring at the Smc3-Scc1 interface in a reaction that is controlled by acetylation and engagement of the Smc ATPase head domains. To understand the underlying molecular mechanisms, we have determined the 3.2-Å resolution cryo-electron microscopy structure of the ATPγS-bound, heterotrimeric cohesin ATPase head module and the 2.1-Å resolution crystal structure of a nucleotide-free Smc1-Scc1 subcomplex from Saccharomyces cerevisiae and Chaetomium thermophilium. We found that ATP-binding and Smc1-Smc3 heterodimerization promote conformational changes within the ATPase that are transmitted to the Smc coiled-coil domains. Remodeling of the coiled-coil domain of Smc3 abrogates the binding surface for Scc1, thus leading to ring opening at the Smc3-Scc1 interface.


    Organizational Affiliation

    Department of Molecular and Cell Biology, Leicester Institute of Structural and Chemical Biology, University of Leicester, Leicester, UK. daniel.panne@leicester.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Structural maintenance of chromosomes protein,Structural maintenance of chromosomes protein AC453Chaetomium thermophilum var. thermophilum DSM 1495Mutation(s): 0 
Gene Names: CTHT_0066330
Find proteins for G0SGH3 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Explore G0SGH3 
Go to UniProtKB:  G0SGH3
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Sister chromatid cohesion protein 1 BD566Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: MCD1PDS3RHC21SCC1YDL003WYD8119.04
Find proteins for Q12158 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q12158 
Go to UniProtKB:  Q12158
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.752α = 90
b = 111.13β = 90
c = 166.195γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2020-02-05
    Type: Initial release
  • Version 1.1: 2020-02-26
    Changes: Database references
  • Version 1.2: 2020-03-18
    Changes: Database references