4POC

Structure of Triosephosphate Isomerase Wild Type human enzyme.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.601 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.153 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Triosephosphate isomerase I170V alters catalytic site, enhances stability and induces pathology in a Drosophila model of TPI deficiency.

Roland, B.P.Amrich, C.G.Kammerer, C.J.Stuchul, K.A.Larsen, S.B.Rode, S.Aslam, A.A.Heroux, A.Wetzel, R.VanDemark, A.P.Palladino, M.J.

(2015) Biochim.Biophys.Acta 1852: 61-69

  • DOI: 10.1016/j.bbadis.2014.10.010
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Triosephosphate isomerase (TPI) is a glycolytic enzyme which homodimerizes for full catalytic activity. Mutations of the TPI gene elicit a disease known as TPI Deficiency, a glycolytic enzymopathy noted for its unique severity of neurological symptom ...

    Triosephosphate isomerase (TPI) is a glycolytic enzyme which homodimerizes for full catalytic activity. Mutations of the TPI gene elicit a disease known as TPI Deficiency, a glycolytic enzymopathy noted for its unique severity of neurological symptoms. Evidence suggests that TPI Deficiency pathogenesis may be due to conformational changes of the protein, likely affecting dimerization and protein stability. In this report, we genetically and physically characterize a human disease-associated TPI mutation caused by an I170V substitution. Human TPI(I170V) elicits behavioral abnormalities in Drosophila. An examination of hTPI(I170V) enzyme kinetics revealed this substitution reduced catalytic turnover, while assessments of thermal stability demonstrated an increase in enzyme stability. The crystal structure of the homodimeric I170V mutant reveals changes in the geometry of critical residues within the catalytic pocket. Collectively these data reveal new observations of the structural and kinetic determinants of TPI Deficiency pathology, providing new insights into disease pathogenesis.


    Organizational Affiliation

    Department of Pharmacology & Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA; Pittsburgh Institute for Neurodegenerative Diseases (PIND), University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Triosephosphate isomerase
A, B
254Homo sapiensMutation(s): 0 
Gene Names: TPI1 (TPI)
EC: 5.3.1.1
Find proteins for P60174 (Homo sapiens)
Go to Gene View: TPI1
Go to UniProtKB:  P60174
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

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A, B
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
PO4
Query on PO4

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B
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
NA
Query on NA

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A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
BR
Query on BR

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A, B
BROMIDE ION
Br
CPELXLSAUQHCOX-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.601 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.153 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 47.920α = 90.00
b = 48.851β = 103.66
c = 93.966γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
DENZOdata reduction
PHENIXrefinement
PDB_EXTRACTdata extraction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-01-14
    Type: Initial release