4MCR

A high resolution structure of human glutamate carboxypeptidase II (GCPII) in complex with folyltri-gamma-L-glutamic acid (pteroyltetra-gamma-L-glutamic acid)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.167 
  • R-Value Work: 0.133 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and biochemical characterization of the folyl-poly-gamma-l-glutamate hydrolyzing activity of human glutamate carboxypeptidase II.

Navratil, M.Ptacek, J.Sacha, P.Starkova, J.Lubkowski, J.Barinka, C.Konvalinka, J.

(2014) Febs J. 281: 3228-3242

  • DOI: 10.1111/febs.12857
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In addition to its well-characterized role in the central nervous system, human glutamate carboxypeptidase II (GCPII; Uniprot ID Q04609) acts as a folate hydrolase in the small intestine, participating in the absorption of dietary polyglutamylated fo ...

    In addition to its well-characterized role in the central nervous system, human glutamate carboxypeptidase II (GCPII; Uniprot ID Q04609) acts as a folate hydrolase in the small intestine, participating in the absorption of dietary polyglutamylated folates (folyl-n-γ-l-glutamic acid), which are the provitamin form of folic acid (also known as vitamin B9 ). Despite the role of GCPII as a folate hydrolase, nothing is known about the processing of polyglutamylated folates by GCPII at the structural or enzymological level. Moreover, many epidemiologic studies on the relationship of the naturally occurring His475Tyr polymorphism to folic acid status suggest that this polymorphism may be associated with several pathologies linked to impaired folate metabolism. In the present study, we report: (a) a series X-ray structures of complexes between a catalytically inactive GCPII mutant (Glu424Ala) and a panel of naturally occurring polyglutamylated folates; (b) the X-ray structure of the His475Tyr variant at a resolution of 1.83 Å; (c) the study of the recently identified arene-binding site of GCPII through mutagenesis (Arg463Leu, Arg511Leu and Trp541Ala), inhibitor binding and enzyme kinetics with polyglutamylated folates as substrates; and (d) a comparison of the thermal stabilities and folate-hydrolyzing activities of GCPII wild-type and His475Tyr variants. As a result, the crystallographic data reveal considerable details about the binding mode of polyglutamylated folates to GCPII, especially the engagement of the arene binding site in recognizing the folic acid moiety. Additionally, the combined structural and kinetic data suggest that GCPII wild-type and His475Tyr variant are functionally identical.


    Organizational Affiliation

    Gilead Sciences and IOCB Research Centre, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Prague 6, Czech Republic; Department of Biochemistry, Faculty of Sciences, Charles University in Prague, Czech Republic.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Glutamate carboxypeptidase 2
A
757Homo sapiensMutation(s): 1 
Gene Names: FOLH1 (FOLH, NAALAD1, PSM, PSMA)
EC: 3.4.17.21
Find proteins for Q04609 (Homo sapiens)
Go to Gene View: FOLH1
Go to UniProtKB:  Q04609
Small Molecules
Ligands 7 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

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A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

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A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
MAN
Query on MAN

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A
ALPHA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
 Ligand Interaction
29D
Query on 29D

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A
N-(4-{[(2-amino-4-oxo-3,4-dihydropteridin-6-yl)methyl]amino}benzoyl)-L-gamma-glutamyl-L-gamma-glutamyl-L-gamma-glutamyl-L-glutamic acid
C34 H40 N10 O15
YMUKRFYNHZWDBN-TUFLPTIASA-N
 Ligand Interaction
BMA
Query on BMA

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A
BETA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-RWOPYEJCSA-N
 Ligand Interaction
NAG
Query on NAG

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A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.167 
  • R-Value Work: 0.133 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 101.491α = 90.00
b = 129.830β = 90.00
c = 158.811γ = 90.00
Software Package:
Software NamePurpose
SERGUIdata collection
REFMACphasing
HKL-2000data scaling
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-06-18
    Type: Initial release
  • Version 1.1: 2014-08-13
    Type: Database references