1QHL

CRYSTAL STRUCTURE OF THE N-TERMINAL DOMAIN OF MUKB AT 2.2A RESOLUTION

• PDB DOI:  https://doi.org/10.2210/pdb1QHL/pdb

• Classification: CELL DIVISION PROTEIN
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1999-05-17 Released: 1999-11-10 
• Deposition Author(s): van den Ent, F., Lowe, J.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.292 
• R-Value Work: 0.217 

Literature

Crystal structure of the N-terminal domain of MukB: a protein involved in chromosome partitioning.

van den Ent, F., Lockhart, A., Kendrick-Jones, J., Lowe, J.

(1999) Structure 7: 1181-1187

• PubMed: 10545328 
• DOI: https://doi.org/10.1016/s0969-2126(00)80052-0
• Primary Citation of Related Structures:  
  1QHL


• PubMed Abstract: 
  

The 170 kDa protein MukB has been implicated in ATP-dependent chromosome partitioning during cell division in Escherichia coli. MukB shares its dimeric structure and domain architecture with the ubiquitous family of SMC (structural maintenance of chromosomes) proteins that facilitate similar functions. The N-terminal domain of MukB carries a putative Walker A nucleotide-binding region and the C-terminal domain has been shown to bind to DNA. Mutant phenotypes and a domain arrangement similar to motor proteins that move on microtubules led to the suggestion that MukB might be a motor protein acting on DNA.

---

Organizational Affiliation: 

MRC Laboratory of Molecular Biology, Hills Road, Cambridge, CB2 2QH, UK.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 25.25 kDa 
• Atom Count: 1,673 
• Modelled Residue Count: 204 
• Deposited Residue Count: 227 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (CELL DIVISION PROTEIN MUKB)	A	227	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P22523 (Escherichia coli (strain K12)) Explore P22523  Go to UniProtKB:  P22523

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.292 
• R-Value Work: 0.217 
• Space Group: P 6 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 111.4	α = 90
b = 111.4	β = 90
c = 65	γ = 120

Software Package:

Software Name	Purpose
CCP4	model building
X-PLOR	refinement
MOSFLM	data reduction
CCP4	data scaling
CCP4	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-11-10 
Deposition Author(s): van den Ent, F., Lowe, J.

Revision History  

• Version 1.0: 1999-11-10
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance