1NNS

L-asparaginase of E. coli in C2 space group and 1.95 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.130 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Structural comparison of Escherichia coli L-asparaginase in two monoclinic space groups.

Sanches, M.Barbosa, J.A.R.G.de Oliveira, R.T.Abrahao Neto, J.Polikarpov, I.

(2003) Acta Crystallogr.,Sect.D 59: 416-422


  • PubMed Abstract: 
  • The functional L-asparaginase from Escherichia coli is a homotetramer with a molecular weight of about 142 kDa. The X-ray structure of the enzyme, crystallized in a new form (space group C2) and refined to 1.95 A resolution, is compared with that of ...

    The functional L-asparaginase from Escherichia coli is a homotetramer with a molecular weight of about 142 kDa. The X-ray structure of the enzyme, crystallized in a new form (space group C2) and refined to 1.95 A resolution, is compared with that of the previously determined crystal form (space group P2(1)). The asymmetric unit of the new crystal form contains an L-asparaginase dimer instead of the tetramer found in the previous crystal form. It is found that crystal contacts practically do not affect the conformation of the protein. It is shown that subunit C of the tetrameric form is in a conformation which is systematically different from that of all other subunits in both crystal forms. Major conformational differences are confined to the lid loop (residues 14-27). In addition, the stability of this globular protein is analyzed in terms of the interactions between hydrophobic parts of the subunits.


    Related Citations: 
    • Crystal structure of Escherichia coli L-asparaginase, an enzyme used in cancer therapy
      Swain, A.L.,Jaskolski, M.,Housset, D.,Rao, M.J.K.,Wlodawer, A.
      (1993) Proc.Natl.Acad.Sci.USA 90: 1474
    • Preparation and preliminary S-ray diffraction studies of a new crystal of L-asparaginase from Escherichia coli
      Polikarpov, I.,Oliveira, R.T.,Abraho-Neto, J.
      (1999) Acta Crystallogr.,Sect.D 55: 1616


    Organizational Affiliation

    Grupo de Cristalografia, Departamento de Física em Sã;o Carlos, USP, Av. Trabalhador SãoCarlense 400, CEP 13560-970, São Carlos/SP, Brazil.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
L-asparaginase II
A, B
326Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: ansB
EC: 3.5.1.1
Find proteins for P00805 (Escherichia coli (strain K12))
Go to UniProtKB:  P00805
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ASP
Query on ASP

Download SDF File 
Download CCD File 
A, B
ASPARTIC ACID
C4 H7 N O4
CKLJMWTZIZZHCS-REOHCLBHSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.171 
  • R-Value Work: 0.130 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 76.296α = 90.00
b = 134.617β = 110.51
c = 64.867γ = 90.00
Software Package:
Software NamePurpose
MAR345data collection
SCALEPACKdata scaling
AMoREphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-03-11
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Derived calculations, Version format compliance
  • Version 1.3: 2017-07-05
    Type: Database references
  • Version 1.4: 2017-10-11
    Type: Refinement description