5XG2

Crystal structure of a coiled-coil segment (residues 345-468 and 694-814) of Pyrococcus yayanosii Smc


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of Full-Length SMC and Rearrangements Required for Chromosome Organization

Diebold-Durand, M.L.Lee, H.Ruiz Avila, L.B.Noh, H.Shin, H.C.Im, H.Bock, F.P.Burmann, F.Durand, A.Basfeld, A.Ham, S.Basquin, J.Oh, B.-H.Gruber, S.

(2017) Mol. Cell 67: 334-347.e5

  • DOI: 10.1016/j.molcel.2017.06.010
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Multi-subunit SMC complexes control chromosome superstructure and promote chromosome disjunction, conceivably by actively translocating along DNA double helices. SMC subunits comprise an ABC ATPase "head" and a "hinge" dimerization domain connected b ...

    Multi-subunit SMC complexes control chromosome superstructure and promote chromosome disjunction, conceivably by actively translocating along DNA double helices. SMC subunits comprise an ABC ATPase "head" and a "hinge" dimerization domain connected by a 49 nm coiled-coil "arm." The heads undergo ATP-dependent engagement and disengagement to drive SMC action on the chromosome. Here, we elucidate the architecture of prokaryotic Smc dimers by high-throughput cysteine cross-linking and crystallography. Co-alignment of the Smc arms tightly closes the interarm space and misaligns the Smc head domains at the end of the rod by close apposition of their ABC signature motifs. Sandwiching of ATP molecules between Smc heads requires them to substantially tilt and translate relative to each other, thereby opening up the Smc arms. We show that this mechanochemical gating reaction regulates chromosome targeting and propose a mechanism for DNA translocation based on the merging of DNA loops upon closure of Smc arms.


    Organizational Affiliation

    Chromosome Organisation and Dynamics, Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany; Department of Fundamental Microbiology, University of Lausanne, Bâtiment Biophore, 1015 Lausanne, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Chromosome partition protein Smc
A
260Pyrococcus yayanosii (strain CH1 / JCM 16557)Mutation(s): 0 
Gene Names: smc
Find proteins for F8AFS8 (Pyrococcus yayanosii (strain CH1 / JCM 16557))
Go to UniProtKB:  F8AFS8
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MPD
Query on MPD

Download SDF File 
Download CCD File 
A
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.213 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 36.175α = 90.00
b = 53.710β = 90.83
c = 71.399γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
HKLdata reduction
PDB_EXTRACTdata extraction
HKL-2000data scaling
HKLdata scaling
HKL-2000data collection
PHENIXrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-06-07
    Type: Initial release
  • Version 1.1: 2017-08-02
    Type: Database references