1KV5

Structure of Trypanosoma brucei brucei TIM with the salt-bridge-forming residue Arg191 mutated to Ser


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.143 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The importance of the conserved Arg191-Asp227 salt bridge of triosephosphate isomerase for folding, stability, and catalysis

Kursula, I.Partanen, S.Lambeir, A.-M.Wierenga, R.K.

(2002) FEBS Lett. 518: 39-42


  • PubMed Abstract: 
  • Triosephosphate isomerase (TIM) has a conserved salt bridge 20 A away from both the active site and the dimer interface. In this study, four salt bridge mutants of Trypanosoma brucei brucei TIM were characterized. The folding and stability of the mut ...

    Triosephosphate isomerase (TIM) has a conserved salt bridge 20 A away from both the active site and the dimer interface. In this study, four salt bridge mutants of Trypanosoma brucei brucei TIM were characterized. The folding and stability of the mutants are impaired compared to the wild-type enzyme. This salt bridge is part of a hydrogen bonding network which tethers the C-terminal beta7alpha7beta8alpha8 unit to the bulk of the protein. In the variants D227N, D227A, and R191S, this network is preserved, as can be deduced from the structure of the R191S variant. In the R191A variant, the side chain at position 191 cannot contribute to this network. Also the catalytic power of this variant is most affected.


    Organizational Affiliation

    Department of Biochemistry and Biocenter Oulu, University of Oulu, P.O. Box 3000, FIN-90014 Oulu, Finland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
triosephosphate isomerase, glycosomal
A, B
250Trypanosoma brucei bruceiEC: 5.3.1.1
Find proteins for P04789 (Trypanosoma brucei brucei)
Go to UniProtKB:  P04789
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

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A, B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
DTT
Query on DTT

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Download CCD File 
A
2,3-DIHYDROXY-1,4-DITHIOBUTANE
1,4-DITHIOTHREITOL
C4 H10 O2 S2
VHJLVAABSRFDPM-IMJSIDKUSA-N
 Ligand Interaction
PGA
Query on PGA

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Download CCD File 
A, B
2-PHOSPHOGLYCOLIC ACID
C2 H5 O6 P
ASCFNMCAHFUBCO-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
PGAKi: 60000 nM BINDINGMOAD
PGAKi: 60000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.143 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 44.943α = 90.00
b = 100.638β = 90.00
c = 109.350γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-03-29
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance