1ECF

ESCHERICHIA COLI GLUTAMINE PHOSPHORIBOSYLPYROPHOSPHATE (PRPP) AMIDOTRANSFERASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.175 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of glutamine phosphoribosylpyrophosphate amidotransferase from Escherichia coli.

Muchmore, C.R.Krahn, J.M.Kim, J.H.Zalkin, H.Smith, J.L.

(1998) Protein Sci. 7: 39-51

  • DOI: 10.1002/pro.5560070104
  • Primary Citation of Related Structures:  1ECJ

  • PubMed Abstract: 
  • Crystal structures of glutamine phosphoribosylpyrophosphate (PRPP) amidotransferase from Escherichia coli have been determined to 2.0-A resolution in the absence of ligands, and to 2.5-A resolution with the feedback inhibitor AMP bound to the PRPP ca ...

    Crystal structures of glutamine phosphoribosylpyrophosphate (PRPP) amidotransferase from Escherichia coli have been determined to 2.0-A resolution in the absence of ligands, and to 2.5-A resolution with the feedback inhibitor AMP bound to the PRPP catalytic site. Glutamine PRPP amidotransferase (GPATase) employs separate catalytic domains to abstract nitrogen from the amide of glutamine and to transfer nitrogen to the acceptor substrate PRPP. The unliganded and AMP-bound structures, which are essentially identical, are interpreted as the inhibited form of the enzyme because the two active sites are disconnected and the PRPP active site is solvent exposed. The structures were compared with a previously reported 3.0-A structure of the homologous Bacillus subtilis enzyme (Smith JL et al., 1994, Science 264:1427-1433). The comparison indicates a pattern of conservation of peptide structures involved with catalysis and variability in enzyme regulatory functions. Control of glutaminase activity, communication between the active sites, and regulation by feedback inhibitors are addressed differently by E. coli and B. subtilis GPATases. The E. coli enzyme is a prototype for the metal-free GPATases, whereas the B. subtilis enzyme represents the metal-containing enzymes. The structure of the E. coli enzyme suggests that a common ancestor of the two enzyme subfamilies may have included an Fe-S cluster.


    Organizational Affiliation

    Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GLUTAMINE PHOSPHORIBOSYLPYROPHOSPHATE AMIDOTRANSFERASE
A, B
504Escherichia coli (strain K12)Gene Names: purF
EC: 2.4.2.14
Find proteins for P0AG16 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AG16
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PIN
Query on PIN

Download SDF File 
Download CCD File 
A, B
PIPERAZINE-N,N'-BIS(2-ETHANESULFONIC ACID)
PIPES; 1,4-PIPERAZINEDIETHANESULFONIC ACID
C8 H18 N2 O6 S2
IHPYMWDTONKSCO-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.175 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 116.900α = 90.00
b = 157.500β = 90.00
c = 106.300γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
SHARPphasing
X-PLORmodel building
HKLdata reduction
X-PLORrefinement
HKLdata scaling
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1996-04-23 
  • Released Date: 1996-11-08 
  • Deposition Author(s): Krahn, J.M.

Revision History 

  • Version 1.0: 1996-11-08
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2011-11-16
    Type: Atomic model