4E2F

Crystal Structure of E. coli Aspartate Transcarbamoylase K164E/E239K Mutant in an intermediate state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Trapping and structure determination of an intermediate in the allosteric transition of aspartate transcarbamoylase.

Guo, W.West, J.M.Dutton, A.S.Tsuruta, H.Kantrowitz, E.R.

(2012) Proc.Natl.Acad.Sci.USA 109: 7741-7746

  • DOI: 10.1073/pnas.1119683109

  • PubMed Abstract: 
  • X-ray crystallography and small-angle X-ray scattering (SAXS) in solution have been used to show that a mutant aspartate transcarbamoylase exists in an intermediate quaternary structure between the canonical T and R structures. Additionally, the SAXS ...

    X-ray crystallography and small-angle X-ray scattering (SAXS) in solution have been used to show that a mutant aspartate transcarbamoylase exists in an intermediate quaternary structure between the canonical T and R structures. Additionally, the SAXS data indicate a pH-dependent structural alteration consistent with either a pH-induced conformational change or a pH-induced alteration in the T to R equilibrium. These data indicate that this mutant is not a model for the R state, as has been proposed, but rather represents the enzyme trapped along the path of the allosteric transition between the T and R states.


    Organizational Affiliation

    Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA 02467, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Aspartate carbamoyltransferase catalytic chain
I, K, G, C, A, E
310Escherichia coli (strain K12)Mutation(s): 2 
Gene Names: pyrB
EC: 2.1.3.2
Find proteins for P0A786 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A786
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Aspartate carbamoyltransferase regulatory chain
D, B, J, L, H, F
153Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: pyrI
Find proteins for P0A7F3 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A7F3
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
B, D, F, H, J, L
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.214 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 124.086α = 90.00
b = 144.814β = 90.00
c = 203.359γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
d*TREKdata reduction
CrystalCleardata collection
d*TREKdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-02
    Type: Initial release
  • Version 1.1: 2012-05-16
    Type: Database references
  • Version 1.2: 2012-05-30
    Type: Database references