1JBW

FPGS-AMPPCP-folate complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Folate-binding triggers the activation of folylpolyglutamate synthetase.

Sun, X.Cross, J.A.Bognar, A.L.Baker, E.N.Smith, C.A.

(2001) J Mol Biol 310: 1067-1078

  • DOI: 10.1006/jmbi.2001.4815
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Folic acid is an essential vitamin for normal cell growth, primarily through its central role in one-carbon metabolism. Folate analogs (antifolates) are targeted at the same reactions and are widely used as therapeutic drugs for cancer and bacterial ...

    Folic acid is an essential vitamin for normal cell growth, primarily through its central role in one-carbon metabolism. Folate analogs (antifolates) are targeted at the same reactions and are widely used as therapeutic drugs for cancer and bacterial infections. Effective retention of folates in cells and the efficacy of antifolate drugs both depend upon the addition of a polyglutamate tail to the folate or antifolate molecule by the enzyme folylpolyglutamate synthetase (FPGS). The reaction mechanism involves the ATP-dependent activation of the free carboxylate group on the folate molecule to give an acyl phosphate intermediate, followed by attack by the incoming L-glutamate substrate. FPGS shares a number of structural and mechanistic details with the bacterial cell wall ligases MurD, MurE and MurF, and these enzymes, along with FPGS, form a subfamily of the ADP-forming amide bond ligase family. High-resolution crystallographic analyses of binary and ternary complexes of Lactobacillus casei FPGS reveal that binding of the first substrate (ATP) is not sufficient to generate an active enzyme. However, binding of folate as the second substrate triggers a large conformational change that activates FPGS and allows the enzyme to adopt a form that is then able to bind the third substrate, L-glutamate, and effect the addition of a polyglutamate tail to the folate.


    Organizational Affiliation

    School of Biological Sciences, University of Auckland, New Zealand.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FOLYLPOLYGLUTAMATE SYNTHASEA428Lactobacillus caseiMutation(s): 1 
Gene Names: fpgS
EC: 6.3.2.17
Find proteins for P15925 (Lactobacillus casei)
Explore P15925 
Go to UniProtKB:  P15925
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACQ
Query on ACQ

Download CCD File 
A
DIPHOSPHOMETHYLPHOSPHONIC ACID ADENYLATE ESTER
C11 H19 N5 O15 P4
ARRGHMSEJJFDME-IOSLPCCCSA-N
 Ligand Interaction
TMF
Query on TMF

Download CCD File 
A
5,10-METHYLENE-6-HYDROFOLIC ACID
C20 H21 N7 O6
BHJAPJNOACHPNI-CHWSQXEVSA-N
 Ligand Interaction
MG
Query on MG

Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
KCX
Query on KCX
AL-PEPTIDE LINKINGC7 H14 N2 O4LYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.195 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 53.1α = 90
b = 45.6β = 104.6
c = 82.7γ = 90
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-09-19
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance