3W6J

Crystal structure of ScpAB core complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Molecular basis of SMC ATPase activation: role of internal structural changes of the regulatory subcomplex ScpAB

Kamada, K.Miyata, M.Hirano, T.

(2013) Structure 21: 581-594

  • DOI: 10.1016/j.str.2013.02.016
  • Primary Citation of Related Structures:  3W6K

  • PubMed Abstract: 
  • In many bacteria, a homodimer of structural-maintenance-of-chromosomes proteins associates with two regulatory subunits (known as ScpA and ScpB), assembling a protein complex that plays a crucial role in chromosome organization and segregation. It re ...

    In many bacteria, a homodimer of structural-maintenance-of-chromosomes proteins associates with two regulatory subunits (known as ScpA and ScpB), assembling a protein complex that plays a crucial role in chromosome organization and segregation. It remains poorly understood, however, how this complex might work at the mechanistic level. Here, we report crystal structures of the ScpAB core complex that display a highly unusual structure in which the central segment of ScpA winds around an asymmetrically oriented ScpB dimer. The two C-terminal domains of the ScpB dimer primarily interact with different regions of ScpA with different affinities. Moreover, flexible interdomain regions of ScpB contribute to a dynamic folding process of the ScpAB subcomplex. Together with other genetic and biochemical assays, we provide evidence that internal structural changes of the ScpAB subcomplex are tightly coupled with activation of the structural-maintenance-of-chromosomes ATPase.


    Organizational Affiliation

    Chromosome Dynamics Laboratory, RIKEN Advanced Science Institute, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. kamadak@riken.jp




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ScpA
A, D
174Geobacillus sp. (strain Y412MC52)Gene Names: scpA
Find proteins for A0A0E0TD69 (Geobacillus sp. (strain Y412MC52))
Go to UniProtKB:  A0A0E0TD69
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
ScpB
B, C, E, F
184Geobacillus sp. (strain Y412MC52)Gene Names: scpB
Find proteins for A0A0E0TE00 (Geobacillus sp. (strain Y412MC52))
Go to UniProtKB:  A0A0E0TE00
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.225 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 90.856α = 90.00
b = 127.423β = 113.84
c = 97.218γ = 90.00
Software Package:
Software NamePurpose
PHENIXmodel building
PHENIXrefinement
HKL-2000data scaling
HKL-2000data collection
HKL-2000data reduction
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-02-15 
  • Released Date: 2013-04-24 
  • Deposition Author(s): Kamada, K., Hirano, T.

Revision History 

  • Version 1.0: 2013-04-24
    Type: Initial release
  • Version 1.1: 2013-06-05
    Type: Database references