4GYH

Structure of human thymidylate synthase at high salt conditions


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.005 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.215 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Analysis of mRNA recognition by human thymidylate synthase.

Brunn, N.D.Dibrov, S.M.Kao, M.B.Ghassemian, M.Hermann, T.

(2014) Biosci.Rep. 34: e00168-e00168

  • DOI: 10.1042/BSR20140137
  • Primary Citation of Related Structures:  4H1I

  • PubMed Abstract: 
  • Expression of hTS (human thymidylate synthase), a key enzyme in thymidine biosynthesis, is regulated on the translational level through a feedback mechanism that is rarely found in eukaryotes. At low substrate concentrations, the ligand-free enzyme b ...

    Expression of hTS (human thymidylate synthase), a key enzyme in thymidine biosynthesis, is regulated on the translational level through a feedback mechanism that is rarely found in eukaryotes. At low substrate concentrations, the ligand-free enzyme binds to its own mRNA and stabilizes a hairpin structure that sequesters the start codon. When in complex with dUMP (2'-deoxyuridine-5'-monophosphate) and a THF (tetrahydrofolate) cofactor, the enzyme adopts a conformation that is unable to bind and repress expression of mRNA. Here, we have used a combination of X-ray crystallography, RNA mutagenesis and site-specific cross-linking studies to investigate the molecular recognition of TS mRNA by the hTS enzyme. The interacting mRNA region was narrowed to the start codon and immediately flanking sequences. In the hTS enzyme, a helix-loop-helix domain on the protein surface was identified as the putative RNA-binding site.


    Organizational Affiliation

    *Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, U.S.A.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thymidylate synthase
A
318Homo sapiensGene Names: TYMS (TS)
EC: 2.1.1.45
Find proteins for P04818 (Homo sapiens)
Go to Gene View: TYMS
Go to UniProtKB:  P04818
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.005 Å
  • R-Value Free: 0.280 
  • R-Value Work: 0.215 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 96.194α = 90.00
b = 96.194β = 90.00
c = 83.275γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHASERphasing
PHENIXrefinement
MAR345dtbdata collection
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-03
    Type: Initial release
  • Version 1.1: 2014-12-24
    Type: Database references
  • Version 1.2: 2015-01-28
    Type: Database references