2Q09

Crystal structure of Imidazolonepropionase from environmental sample with bound inhibitor 3-(2,5-Dioxo-imidazolidin-4-yl)-propionic acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.97 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A common catalytic mechanism for proteins of the HutI family.

Tyagi, R.Eswaramoorthy, S.Burley, S.K.Raushel, F.M.Swaminathan, S.

(2008) Biochemistry 47: 5608-5615

  • DOI: 10.1021/bi800180g

  • PubMed Abstract: 
  • Imidazolonepropionase (HutI) (imidazolone-5-propanote hydrolase, EC 3.5.2.7) is a member of the amidohydrolase superfamily and catalyzes the conversion of imidazolone-5-propanoate to N-formimino-L-glutamate in the histidine degradation pathway. We ha ...

    Imidazolonepropionase (HutI) (imidazolone-5-propanote hydrolase, EC 3.5.2.7) is a member of the amidohydrolase superfamily and catalyzes the conversion of imidazolone-5-propanoate to N-formimino-L-glutamate in the histidine degradation pathway. We have determined the three-dimensional crystal structures of HutI from Agrobacterium tumefaciens (At-HutI) and an environmental sample from the Sargasso Sea Ocean Going Survey (Es-HutI) bound to the product [ N-formimino-L-glutamate (NIG)] and an inhibitor [3-(2,5-dioxoimidazolidin-4-yl)propionic acid (DIP)], respectively. In both structures, the active site is contained within each monomer, and its organization displays the landmark feature of the amidohydrolase superfamily, showing a metal ligand (iron), four histidines, and one aspartic acid. A catalytic mechanism involving His265 is proposed on the basis of the inhibitor-bound structure. This mechanism is applicable to all HutI forms.


    Organizational Affiliation

    Biology Department, Brookhaven National Laboratory, Upton, New York 11973, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Imidazolonepropionase
A
416Aeromonas hydrophila subsp. hydrophila (strain ATCC 7966 / DSM 30187 / JCM 1027 / KCTC 2358 / NCIMB 9240)Mutation(s): 0 
Gene Names: hutI
EC: 3.5.2.7
Find proteins for A0KF84 (Aeromonas hydrophila subsp. hydrophila (strain ATCC 7966 / DSM 30187 / JCM 1027 / KCTC 2358 / NCIMB 9240))
Go to UniProtKB:  A0KF84
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DI6
Query on DI6

Download SDF File 
Download CCD File 
A
3-[(4S)-2,5-DIOXOIMIDAZOLIDIN-4-YL]PROPANOIC ACID
C6 H8 N2 O4
VWFWNXQAMGDPGG-VKHMYHEASA-N
 Ligand Interaction
FE
Query on FE

Download SDF File 
Download CCD File 
A
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.97 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.194 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 95.910α = 90.00
b = 95.910β = 90.00
c = 115.473γ = 120.00
Software Package:
Software NamePurpose
CBASSdata collection
HKL-2000data scaling
MOLREPphasing
HKL-2000data reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-06-05
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance