1DVJ

CRYSTAL STRUCTURE OF OROTIDINE MONOPHOSPHATE DECARBOXYLASE COMPLEXED WITH 6-AZAUMP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Electrostatic stress in catalysis: structure and mechanism of the enzyme orotidine monophosphate decarboxylase.

Wu, N.Mo, Y.Gao, J.Pai, E.F.

(2000) Proc.Natl.Acad.Sci.USA 97: 2017-2022

  • DOI: 10.1073/pnas.050417797
  • Primary Citation of Related Structures:  1DV7

  • PubMed Abstract: 
  • Orotidine 5'-monophosphate decarboxylase catalyzes the conversion of orotidine 5'-monophosphate to uridine 5'-monophosphate, the last step in biosynthesis of pyrimidine nucleotides. As part of a Structural Genomics Initiative, the crystal structures ...

    Orotidine 5'-monophosphate decarboxylase catalyzes the conversion of orotidine 5'-monophosphate to uridine 5'-monophosphate, the last step in biosynthesis of pyrimidine nucleotides. As part of a Structural Genomics Initiative, the crystal structures of the ligand-free and the6-azauridine 5'-monophosphate-complexed forms have been determined at 1.8 and 1.5 A, respectively. The protein assumes a TIM-barrel fold with one side of the barrel closed off and the other side binding the inhibitor. A unique array of alternating charges (Lys-Asp-Lys-Asp) in the active site prompted us to apply quantum mechanical and molecular dynamics calculations to analyze the relative contributions of ground state destabilization and transition state stabilization to catalysis. The remarkable catalytic power of orotidine 5'-monophosphate decarboxylase is almost exclusively achieved via destabilization of the reactive part of the substrate, which is compensated for by strong binding of the phosphate and ribose groups. The computational results are consistent with a catalytic mechanism that is characterized by Jencks's Circe effect.


    Organizational Affiliation

    Department of Biochemistry, Centres of Excellence, University of Toronto, 1 King's College Circle, Toronto, ON Canada M5S 1A8.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
OROTIDINE 5'-PHOSPHATE DECARBOXYLASE
A, B, C, D
246Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H)Gene Names: pyrF
EC: 4.1.1.23
Find proteins for O26232 (Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H))
Go to UniProtKB:  O26232
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
UP6
Query on UP6

Download SDF File 
Download CCD File 
A, B, C, D
6-AZA URIDINE 5'-MONOPHOSPHATE
6-AZA-UMP
C8 H12 N3 O9 P
LRVZOSYMNMNQFR-SHUUEZRQSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
UP6Ki: 12400 nM (99) BINDINGDB
UP6Ki: 510000 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.174 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 72.950α = 90.00
b = 98.620β = 104.03
c = 73.250γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
CNSrefinement
AMoREphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-04-05
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance