1CHM

ENZYMATIC MECHANISM OF CREATINE AMIDINOHYDROLASE AS DEDUCED FROM CRYSTAL STRUCTURES


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Work: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Enzymatic mechanism of creatine amidinohydrolase as deduced from crystal structures.

Coll, M.Knof, S.H.Ohga, Y.Messerschmidt, A.Huber, R.Moellering, H.Russmann, L.Schumacher, G.

(1990) J.Mol.Biol. 214: 597-610


  • PubMed Abstract: 
  • Crystal structures of the enzyme creatine amidinohydrolase (creatinase, EC 3.5.3.3) with two different inhibitors, the reaction product sarcosine and the substrate creatine, bound have been analyzed by X-ray diffraction methods. With the inhibitor ca ...

    Crystal structures of the enzyme creatine amidinohydrolase (creatinase, EC 3.5.3.3) with two different inhibitors, the reaction product sarcosine and the substrate creatine, bound have been analyzed by X-ray diffraction methods. With the inhibitor carbamoyl sarcosine, two different crystal forms at different pH values have been determined. An enzymatic mechanism is proposed on the basis of the eight structures analyzed. The enzyme binds substrate and inhibitor in a distorted geometry where the urea resonance is broken. His232 is the general base and acid, and acts as a proton shuttle. It withdraws a proton from water 377 and donates it to the N(3) atom of the guanidinium group. OH- 377 adds to the C(1) atom of the guanidinium group to form a urea hydrate. Proton withdrawal by His232 leads to products. The reaction product sarcosine binds to the active site in a reverse orientation. The free enzyme was found to have a bicarbonate bound to the active site.


    Related Citations: 
    • Crystal Structure Determination, Refinement and Molecular Model of Creatine Amidinohydrolase from Pseudomonas Putida
      Hoeffken, H.W.,Knof, S.H.,Bartlett, P.A.,Huber, R.,Moellering, H.,Schumacher, G.
      (1988) J.Mol.Biol. 204: 417


    Organizational Affiliation

    Max-Planck-Institut fuer Biochemie, Martinsried bei Muenchen, F.R.G.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CREATINE AMIDINOHYDROLASE
A, B
401Pseudomonas putidaMutation(s): 0 
EC: 3.5.3.3
Find proteins for P38488 (Pseudomonas putida)
Go to UniProtKB:  P38488
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CMS
Query on CMS

Download SDF File 
Download CCD File 
A, B
CARBAMOYL SARCOSINE
C4 H8 N2 O3
SREKYKXYSQMOIB-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
CMSKi: 220000 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Work: 0.177 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 60.830α = 90.00
b = 110.550β = 102.22
c = 62.630γ = 90.00
Software Package:
Software NamePurpose
EREFrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-04-30
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance