1I5O

CRYSTAL STRUCTURE OF MUTANT R105A OF E. COLI ASPARTATE TRANSCARBAMOYLASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.155 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Direct structural evidence for a concerted allosteric transition in Escherichia coli aspartate transcarbamoylase.

Macol, C.P.Tsuruta, H.Stec, B.Kantrowitz, E.R.

(2001) Nat.Struct.Mol.Biol. 8: 423-426

  • DOI: 10.1038/87582

  • PubMed Abstract: 
  • Regulation of protein function, often achieved by allosteric mechanisms, is central to normal physiology and cellular processes. Although numerous models have been proposed to account for the cooperative binding of ligands to allosteric proteins and ...

    Regulation of protein function, often achieved by allosteric mechanisms, is central to normal physiology and cellular processes. Although numerous models have been proposed to account for the cooperative binding of ligands to allosteric proteins and enzymes, direct structural support has been lacking. Here, we used a combination of X-ray crystallography and small angle X-ray scattering in solution to provide direct structural evidence that the binding of ligand to just one of the six active sites of Escherichia coli aspartate transcarbamoylase induces a concerted structural transition from the T to the R state.


    Related Citations: 
    • Structural Consequences of Effector Binding to the T State of Aspartate Carbamoyltransferase: Crystal Structures of the Unligated and ATP- and CTP-complexed Enzymes at 2.6-A Resolution.
      Stevens, R.C.,Gouaux, J.E.,Lipscomb, W.N.
      (1990) Biochemistry 29: 7691


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ASPARTATE TRANSCARBAMOYLASE CATALYTIC CHAIN
A, C
310Escherichia coli (strain K12)Mutations: R105A
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 TRANSCARBAMOYLASE REGULATORY CHAIN
B, D
153Escherichia coli (strain K12)Gene Names: pyrI
Find proteins for P0A7F3 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A7F3
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PAL
Query on PAL

Download SDF File 
Download CCD File 
B
N-(PHOSPHONACETYL)-L-ASPARTIC ACID
C6 H10 N O8 P
ZZKNRXZVGOYGJT-VKHMYHEASA-N
 Ligand Interaction
ZN
Query on ZN

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.155 
  • Space Group: P 3 2 1
Unit Cell:
Length (Å)Angle (°)
a = 122.250α = 90.00
b = 122.250β = 90.00
c = 142.670γ = 120.00
Software Package:
Software NamePurpose
SDMSdata reduction
X-PLORphasing
X-PLORrefinement
X-PLORmodel building
SDMSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-05-02
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance