4DQW

Crystal Structure Analysis of PA3770


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.51 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.218 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

MgATP Regulates Allostery and Fiber Formation in IMPDHs.

Labesse, G.Alexandre, T.Vaupre, L.Salard-Arnaud, I.Him, J.L.Raynal, B.Bron, P.Munier-Lehmann, H.

(2013) Structure 21: 975-985

  • DOI: 10.1016/j.str.2013.03.011
  • Primary Citation of Related Structures:  
    4DQW

  • PubMed Abstract: 
  • Inosine-5'-monophosphate dehydrogenase (IMPDH) is a rate-limiting enzyme in nucleotide biosynthesis studied as an important therapeutic target and its complex functioning in vivo is still puzzling and debated. Here, we highlight the structural basis ...

    Inosine-5'-monophosphate dehydrogenase (IMPDH) is a rate-limiting enzyme in nucleotide biosynthesis studied as an important therapeutic target and its complex functioning in vivo is still puzzling and debated. Here, we highlight the structural basis for the regulation of IMPDHs by MgATP. Our results demonstrate the essential role of the CBS tandem, conserved among almost all IMPDHs. We found that Pseudomonas aeruginosa IMPDH is an octameric enzyme allosterically regulated by MgATP and showed that this octameric organization is widely conserved in the crystal structures of other IMPDHs. We also demonstrated that human IMPDH1 adopts two types of complementary octamers that can pile up into isolated fibers in the presence of MgATP. The aggregation of such fibers in the autosomal dominant mutant, D226N, could explain the onset of the retinopathy adRP10. Thus, the regulatory CBS modules in IMPDHs are functional and they can either modulate catalysis or macromolecular assembly.


    Organizational Affiliation

    CNRS, UMR5048, Universités Montpellier 1 et 2; Centre de Biochimie Structurale, 29 rue de Navacelles, F-34090 Montpellier, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Inosine-5'-monophosphate dehydrogenaseAB509Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: guaBPA3770
EC: 1.1.1.205
Find proteins for Q9HXM5 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9HXM5 
Go to UniProtKB:  Q9HXM5
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download CCD File 
A, B
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
PO4
Query on PO4

Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
MN
Query on MN

Download CCD File 
A, B
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.51 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.218 
  • Space Group: I 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 108.96α = 90
b = 108.96β = 90
c = 194.39γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing
REFMACrefinement
PDB_EXTRACTdata extraction
ADSCdata collection

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-03-06
    Type: Initial release
  • Version 1.1: 2013-06-05
    Changes: Database references
  • Version 1.2: 2013-07-03
    Changes: Database references