1QCZ

CRYSTAL STRUCTURE OF E. COLI PURE, AN UNUSUAL MUTASE THAT CATALYZES THE CONVERSION OF N5-CARBOXYAMINOIMIDAZOLE RIBONUCLEOTIDE (N5-CAIR) TO 4-CARBOXYAMINOIMIDAZOLE RIBONUCLEOTIDE (CAIR) IN THE PURINE BIOSYNTHETIC PATHWAY


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Crystal structure of Escherichia coli PurE, an unusual mutase in the purine biosynthetic pathway.

Mathews, I.I.Kappock, T.J.Stubbe, J.Ealick, S.E.

(1999) Structure 7: 1395-1406

  • DOI: 10.1016/s0969-2126(00)80029-5
  • Primary Citation of Related Structures:  
    1D7A, 1QCZ

  • PubMed Abstract: 
  • Conversion of 5-aminoimidazole ribonucleotide (AIR) to 4-carboxyaminoimidazole ribonucleotide (CAIR) in Escherichia coli requires two proteins - PurK and PurE. PurE has recently been shown to be a mutase that catalyzes the unusual rearrangement of N( ...

    Conversion of 5-aminoimidazole ribonucleotide (AIR) to 4-carboxyaminoimidazole ribonucleotide (CAIR) in Escherichia coli requires two proteins - PurK and PurE. PurE has recently been shown to be a mutase that catalyzes the unusual rearrangement of N(5)-carboxyaminoimidazole ribonucleotide (N(5)-CAIR), the PurK reaction product, to CAIR. PurEs from higher eukaryotes are homologous to E. coli PurE, but use AIR and CO(2) as substrates to produce CAIR directly.


    Related Citations: 
    • Evidence for the Direct Transfer of the Carboxylate of N5-Carboxyaminoimidazole Ribonucleotide (N5-CAIR) to Generate 4-Carboxy-5-Aminoimidazole Ribonucleotide Catalyzed by Escherichia coli purE, an N5-CAIR Mutase
      Meyer, E., Kappock, T.J., Osuji, C., Stubbe, J.
      (1999) Biochemistry 38: 3012
    • Reactions Catalyzed by 5-Aminoimidazole Ribonucleotide Carboxylases from Escherichia coli Carboxylases from Escherichia coli and Gallus gallus: a Case for Divergent Catalytic Mechanisms
      Firestine, S.M., Poon, S.W., Mueller, E.J., Stubbe, J., Davisson, V.J.
      (1994) Biochemistry 33: 11927
    • N5-Carboxyaminoimidazole Ribonucleotide: Evidence for a New Intermediate and Two New Enzymatic Activities in the de novo Purine Biosynthetic Pathway of Escherichia coli
      Mueller, E.J., Meyer, E., Rudolph, J., Davisson, V.J., Stubbe, J.
      (1994) Biochemistry 33: 2269
    • Nucleotide Sequence Analysis of the purEK Operon Encoding 5'-Phosphoribosyl-5-Aminoimidazole Carboxylase of Escherichia coli K-12
      Tiedeman, A.A., Keyhani, J., Kamholz, J., 3D Daum, H.A., Gots, J.S., Smith, J.M.
      (1989) J Bacteriol 171: 205
    • Identification and Sequence Analysis of Escherichia coli purE and purK Genes Encoding 5'-Phosphoribosyl-5-Amino-4-Imidazole Carboxylase for de novo Purine Biosynthesis
      Watanabe, W., Sampei, G., Aiba, A., Mizobuchi, K.
      (1989) J Bacteriol 171: 198

    Organizational Affiliation

    Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
N5-CARBOXYAMINOIMIDAZOLE RIBONUCLEOTIDE MUTASEA169Escherichia coliMutation(s): 4 
EC: 4.1.1.21 (PDB Primary Data), 5.4.99.18 (UniProt)
Find proteins for P0AG18 (Escherichia coli (strain K12))
Explore P0AG18 
Go to UniProtKB:  P0AG18
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
AL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.186 
  • Space Group: I 4 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 113.04α = 90
b = 113.04β = 90
c = 49.41γ = 90
Software Package:
Software NamePurpose
SHAKEmodel building
SnBphasing
X-PLORrefinement
MOSFLMdata reduction
CCP4data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-11-10
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-04
    Changes: Refinement description
  • Version 1.4: 2018-01-31
    Changes: Experimental preparation