Biological Assembly 1  

 3D View: Structure | Electron Density

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 10.84 kDa 
• Atom Count: 852 
• Modelled Residue Count: 94 
• Deposited Residue Count: 94 
• Unique protein chains: 1

1QZM

alpha-domain of ATPase

• DOI: 10.2210/pdb1QZM/pdb

• Classification: HYDROLASE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2003-09-17 Released: 2004-05-04 
• Deposition Author(s): Botos, I., Melnikov, E.E., Cherry, S., Khalatova, A.G., Rasulova, F.S., Tropea, J.E., Maurizi, M.R., Rotanova, T.V., Gustchina, A., Wlodawer, A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.282 
• R-Value Work: 0.179 
• R-Value Observed: 0.184 

Literature

Crystal structure of the AAA+ alpha domain of E. coli Lon protease at 1.9A resolution.

Botos, I., Melnikov, E.E., Cherry, S., Khalatova, A.G., Rasulova, F.S., Tropea, J.E., Maurizi, M.R., Rotanova, T.V., Gustchina, A., Wlodawer, A.

(null) J Struct Biol 146: 113-122

• PubMed: 15037242 
• DOI: 10.1016/j.jsb.2003.09.003
• Primary Citation of Related Structures:  
  1QZM


• PubMed Abstract: 
  

The crystal structure of the small, mostly helical alpha domain of the AAA+ module of the Escherichia coli ATP-dependent protease Lon has been solved by single isomorphous replacement combined with anomalous scattering and refined at 1.9A resolution to a crystallographic R factor of 17.9%. This domain, comprising residues 491-584, was obtained by chymotrypsin digestion of the recombinant full-length protease. The alpha domain of Lon contains four alpha helices and two parallel strands and resembles similar domains found in a variety of ATPases and helicases, including the oligomeric proteases HslVU and ClpAP. The highly conserved "sensor-2" Arg residue is located at the beginning of the third helix. Detailed comparison with the structures of 11 similar domains established the putative location of the nucleotide-binding site in this first fragment of Lon for which a crystal structure has become available.

---

Organizational Affiliation: 

Macromolecular Crystallography Laboratory, National Cancer Institute at Frederick, MCL Bldg. 536, Rm. 5, Frederick, MD 21702-1201, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ATP-dependent protease La	A	94	Escherichia coli	Mutation(s): 0  Gene Names: lon EC: 3.4.21.53
Find proteins for P0A9M0 (Escherichia coli (strain K12)) Explore P0A9M0  Go to UniProtKB:  P0A9M0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.282 
• R-Value Work: 0.179 
• R-Value Observed: 0.184 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 46.43	α = 90
b = 46.43	β = 90
c = 85.2	γ = 90

Software Package:

Software Name	Purpose
SHELX	model building
SHELXL-97	refinement
MAR345	data collection
SCALEPACK	data scaling
SHARP	phasing
CNS	refinement
SHELXL	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-09-17 
• Released Date: 2004-05-04 
Deposition Author(s): Botos, I., Melnikov, E.E., Cherry, S., Khalatova, A.G., Rasulova, F.S., Tropea, J.E., Maurizi, M.R., Rotanova, T.V., Gustchina, A., Wlodawer, A.

Revision History  

• Version 1.0: 2004-05-04
  Type: Initial release
  
• Version 1.1: 2007-11-14
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-10-11
  Changes: Refinement description