3N5G

Crystal Structure of histidine-tagged human thymidylate synthase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.27 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.168 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Protein-protein interface-binding peptides inhibit the cancer therapy target human thymidylate synthase.

Cardinale, D.Guaitoli, G.Tondi, D.Luciani, R.Henrich, S.Salo-Ahen, O.M.Ferrari, S.Marverti, G.Guerrieri, D.Ligabue, A.Frassineti, C.Pozzi, C.Mangani, S.Fessas, D.Guerrini, R.Ponterini, G.Wade, R.C.Costi, M.P.

(2011) Proc Natl Acad Sci U S A 108: E542-E549

  • DOI: 10.1073/pnas.1104829108
  • Primary Citation of Related Structures:  
    3N5E, 3N5G

  • PubMed Abstract: 
  • Human thymidylate synthase is a homodimeric enzyme that plays a key role in DNA synthesis and is a target for several clinically important anticancer drugs that bind to its active site. We have designed peptides to specifically target its dimer interface ...

    Human thymidylate synthase is a homodimeric enzyme that plays a key role in DNA synthesis and is a target for several clinically important anticancer drugs that bind to its active site. We have designed peptides to specifically target its dimer interface. Here we show through X-ray diffraction, spectroscopic, kinetic, and calorimetric evidence that the peptides do indeed bind at the interface of the dimeric protein and stabilize its di-inactive form. The "LR" peptide binds at a previously unknown binding site and shows a previously undescribed mechanism for the allosteric inhibition of a homodimeric enzyme. It inhibits the intracellular enzyme in ovarian cancer cells and reduces cellular growth at low micromolar concentrations in both cisplatin-sensitive and -resistant cells without causing protein overexpression. This peptide demonstrates the potential of allosteric inhibition of hTS for overcoming platinum drug resistance in ovarian cancer.


    Organizational Affiliation

    Department of Pharmaceutical Sciences, via Campi 183, University of Modena and Reggio Emilia, 41126 Modena, Italy.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Thymidylate synthase A325Homo sapiensMutation(s): 0 
Gene Names: TYMSTSOK/SW-cl.29
EC: 2.1.1.45
Find proteins for P04818 (Homo sapiens)
Explore P04818 
Go to UniProtKB:  P04818
NIH Common Fund Data Resources
PHAROS:  P04818
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
CME
Query on CME
AL-PEPTIDE LINKINGC5 H11 N O3 S2CYS
SCH
Query on SCH
AL-PEPTIDE LINKINGC4 H9 N O2 S2CYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.27 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.166 
  • R-Value Observed: 0.168 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.07α = 90
b = 96.07β = 90
c = 83.2γ = 120
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-06-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2013-07-24
    Changes: Database references