1AG1

MONOHYDROGEN PHOSPHATE BINDING TO TRYPANOSOMAL TRIOSEPHOSPHATE ISOMERASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.36 Å
  • R-Value Work: 0.150 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Anion binding at the active site of trypanosomal triosephosphate isomerase. Monohydrogen phosphate does not mimic sulphate.

Verlinde, C.L.Noble, M.E.Kalk, K.H.Groendijk, H.Wierenga, R.K.Hol, W.G.

(1991) Eur.J.Biochem. 198: 53-57


  • PubMed Abstract: 
  • The three-dimensional structure of triosephosphate isomerase complexed with the competitive inhibitor SO-4(2) was determined by X-ray crystallography to a resolution of 0.24 nm. A comparison with the native crystal structure, where SO-4(2) is bound, ...

    The three-dimensional structure of triosephosphate isomerase complexed with the competitive inhibitor SO-4(2) was determined by X-ray crystallography to a resolution of 0.24 nm. A comparison with the native crystal structure, where SO-4(2) is bound, revealed five changes: (a) a 0.10-nm shift of the anion-binding site; (b) a further closing of the flexible loop of the enzyme; (c) a 'swinging in' of the side chain of the catalytic Glu, that is chi 1 changes from (+) to (-) synclinal; (d) an altered water structure; (e) a disappearance of the conformational heterogeneity at the C-terminus of strand beta 7. Some of these changes may be related to the different hydrogen-bond pattern about the two different anions. However, the distance of 0.10 nm between the sulphur and phosphorus positions is unexpected and remains intriguing.


    Organizational Affiliation

    BIOSON Research Institute, University of Groningen, The Netherlands.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRIOSEPHOSPHATE ISOMERASE
O, T
250Trypanosoma brucei bruceiMutation(s): 0 
EC: 5.3.1.1
Find proteins for P04789 (Trypanosoma brucei brucei)
Go to UniProtKB:  P04789
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
T
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.36 Å
  • R-Value Work: 0.150 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 112.840α = 90.00
b = 97.600β = 90.00
c = 46.700γ = 90.00
Software Package:
Software NamePurpose
ISOMORPHOUSmodel building
MADNESdata reduction
TNTrefinement
ISOMORPHOUSphasing
BIOMOLdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-06-16
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-04-18
    Type: Data collection, Other