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

  • DOI: 10.1111/j.1432-1033.1991.tb15985.x
  • Primary Citation of Related Structures:  
    1AG1

  • 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, revealed five changes: (a) a 0 ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TRIOSEPHOSPHATE ISOMERASEA [auth O], B [auth T]250Trypanosoma bruceiMutation(s): 0 
EC: 5.3.1.1
UniProt
Find proteins for P04789 (Trypanosoma brucei brucei)
Explore P04789 
Go to UniProtKB:  P04789
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download Ideal Coordinates CCD File 
C [auth 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 = 112.84α = 90
b = 97.6β = 90
c = 46.7γ = 90
Software Package:
Software NamePurpose
ISOMORPHOUSmodel building
TNTrefinement
MADNESdata reduction
BIOMOLdata scaling
ISOMORPHOUSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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