6QXG

Crystal structure of His-tag human thymidylate synthase (HT-hTS) in complex with FdUMP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.08 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural Comparison ofEnterococcus faecalisand Human Thymidylate Synthase Complexes with the Substrate dUMP and Its Analogue FdUMP Provides Hints about Enzyme Conformational Variabilities.

Pozzi, C.Ferrari, S.Luciani, R.Tassone, G.Costi, M.P.Mangani, S.

(2019) Molecules 24

  • DOI: 10.3390/molecules24071257
  • Primary Citation of Related Structures:  
    6QXS, 6QXH, 6QXG, 6QYA

  • PubMed Abstract: 
  • Thymidylate synthase (TS) is an enzyme of paramount importance as it provides the only de novo source of deoxy-thymidine monophosphate (dTMP). dTMP, essential for DNA synthesis, is produced by the TS-catalyzed reductive methylation of 2'-deoxyuridine-5'- ...

    Thymidylate synthase (TS) is an enzyme of paramount importance as it provides the only de novo source of deoxy-thymidine monophosphate (dTMP). dTMP, essential for DNA synthesis, is produced by the TS-catalyzed reductive methylation of 2'-deoxyuridine-5'-monophosphate (dUMP) using N⁵,N 10 -methylenetetrahydrofolate (mTHF) as a cofactor. TS is ubiquitous and a validated drug target. TS enzymes from different organisms differ in sequence and structure, but are all obligate homodimers. The structural and mechanistic differences between the human and bacterial enzymes are exploitable to obtain selective inhibitors of bacterial TSs that can enrich the currently available therapeutic tools against bacterial infections. Enterococcus faecalis is a pathogen fully dependent on TS for dTMP synthesis. In this study, we present four new crystal structures of Enterococcus faecalis and human TSs in complex with either the substrate dUMP or the inhibitor FdUMP. The results provide new clues about the half-site reactivity of Enterococcus faecalis TS and the mechanisms underlying the conformational changes occurring in the two enzymes. We also identify relevant differences in cofactor and inhibitor binding between Enterococcus faecalis and human TS that can guide the design of selective inhibitors against bacterial TSs.


    Organizational Affiliation

    Department of Biotechnology, Chemistry and Pharmacy-Department of Excellence 2018-2020, University of Siena, via Aldo Moro 2, 53100 Siena, Italy. stefano.mangani@unisi.it.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Thymidylate synthase ABC325Homo 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 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
UFP
Query on UFP

Download Ideal Coordinates CCD File 
A, B, C
5-FLUORO-2'-DEOXYURIDINE-5'-MONOPHOSPHATE
C9 H12 F N2 O8 P
HFEKDTCAMMOLQP-RRKCRQDMSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
UFPKi:  1.100000023841858   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.08 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.183 
  • Space Group: I 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 103.22α = 90
b = 61.98β = 98.96
c = 169.363γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2019-03-07 
  • Released Date: 2019-04-10 
  • Deposition Author(s): Pozzi, C., Mangani, M.

Funding OrganizationLocationGrant Number
European UnionLSH-2005-2.2.0-8

Revision History 

  • Version 1.0: 2019-04-10
    Type: Initial release
  • Version 1.1: 2019-07-10
    Changes: Data collection