5CDO

3.15A structure of QPT-1 with S.aureus DNA gyrase and DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.15 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.216 

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Literature

Structural basis of DNA gyrase inhibition by antibacterial QPT-1, anticancer drug etoposide and moxifloxacin.

Chan, P.F.Srikannathasan, V.Huang, J.Cui, H.Fosberry, A.P.Gu, M.Hann, M.M.Hibbs, M.Homes, P.Ingraham, K.Pizzollo, J.Shen, C.Shillings, A.J.Spitzfaden, C.E.Tanner, R.Theobald, A.J.Stavenger, R.A.Bax, B.D.Gwynn, M.N.

(2015) Nat Commun 6: 10048-10048

  • DOI: https://doi.org/10.1038/ncomms10048
  • Primary Citation of Related Structures:  
    5CDM, 5CDN, 5CDO, 5CDP, 5CDQ, 5CDR

  • PubMed Abstract: 

    New antibacterials are needed to tackle antibiotic-resistant bacteria. Type IIA topoisomerases (topo2As), the targets of fluoroquinolones, regulate DNA topology by creating transient double-strand DNA breaks. Here we report the first co-crystal structures of the antibacterial QPT-1 and the anticancer drug etoposide with Staphylococcus aureus DNA gyrase, showing binding at the same sites in the cleaved DNA as the fluoroquinolone moxifloxacin. Unlike moxifloxacin, QPT-1 and etoposide interact with conserved GyrB TOPRIM residues rationalizing why QPT-1 can overcome fluoroquinolone resistance. Our data show etoposide's antibacterial activity is due to DNA gyrase inhibition and suggests other anticancer agents act similarly. Analysis of multiple DNA gyrase co-crystal structures, including asymmetric cleavage complexes, led to a 'pair of swing-doors' hypothesis in which the movement of one DNA segment regulates cleavage and religation of the second DNA duplex. This mechanism can explain QPT-1's bacterial specificity. Structure-based strategies for developing topo2A antibacterials are suggested.


  • Organizational Affiliation

    Antibacterial Discovery Performance Unit, Infectious Diseases, Therapy Area Unit, GlaxoSmithKline, 1250 South Collegeville Road, Collegeville, Pennsylvania 19426-0989, USA.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA gyrase subunit AA,
C,
G [auth R],
I [auth T]
482Staphylococcus aureus subsp. aureus N315Mutation(s): 0 
Gene Names: gyrASA0006
EC: 5.99.1.3 (PDB Primary Data), 5.6.2.2 (UniProt)
UniProt
Find proteins for Q99XG5 (Staphylococcus aureus (strain N315))
Explore Q99XG5 
Go to UniProtKB:  Q99XG5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ99XG5
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
DNA gyrase subunit B,DNA gyrase subunit BB,
D,
H [auth S],
J [auth U]
188Staphylococcus aureus subsp. aureus N315Mutation(s): 0 
Gene Names: gyrBSA0005
EC: 5.99.1.3 (PDB Primary Data), 5.6.2.2 (UniProt)
UniProt
Find proteins for P66937 (Staphylococcus aureus (strain N315))
Explore P66937 
Go to UniProtKB:  P66937
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP66937
Sequence Annotations
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  • Reference Sequence

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Entity ID: 3
MoleculeChains LengthOrganismImage
DNA (5'-D(P*GP*AP*GP*CP*GP*TP*AP*C*GP*GP*CP*CP*GP*TP*AP*CP*GP*CP*TP*T)-3')E,
F,
K [auth V],
L [auth W]
20synthetic construct
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 7 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
50M
Query on 50M

Download Ideal Coordinates CCD File 
Z [auth S](2R,4S,4aS,5R)-6'-hydroxy-2,4-dimethyl-8-nitro-1,2,4,4a-tetrahydro-2'H,6H-spiro[1,4-oxazino[4,3-a]quinoline-5,5'-pyrimidine]-2',4'(3'H)-dione
C17 H18 N4 O6
DJZPHYIXNUOVJU-VYUIOLGVSA-N
53L
Query on 53L

Download Ideal Coordinates CCD File 
W [auth F](2R,4S,4aS,5S)-6'-hydroxy-2,4-dimethyl-8-nitro-1,2,4,4a-tetrahydro-2'H,6H-spiro[1,4-oxazino[4,3-a]quinoline-5,5'-pyrimidine]-2',4'(3'H)-dione
C17 H18 N4 O6
DJZPHYIXNUOVJU-VYUIOLGVSA-N
53M
Query on 53M

Download Ideal Coordinates CCD File 
GA [auth W],
V [auth E]
(2R,4S,4aS)-4',6'-dihydroxy-2,4-dimethyl-8-nitro-1,2,4,4a-tetrahydro-2'H,6H-spiro[1,4-oxazino[4,3-a]quinoline-5,5'-pyrimidin]-2'-one
C17 H18 N4 O6
DJZPHYIXNUOVJU-VYUIOLGVSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
AA [auth T],
BA [auth T],
M [auth A]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
GOL
Query on GOL

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EA [auth U],
FA [auth U],
O [auth A],
T [auth D],
U [auth D]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
MN
Query on MN

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DA [auth U],
P [auth B],
S [auth D],
Y [auth S]
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
NA
Query on NA

Download Ideal Coordinates CCD File 
CA [auth T],
N [auth A],
Q [auth C],
R [auth C],
X [auth R]
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
PTR
Query on PTR
A,
C,
G [auth R],
I [auth T]
L-PEPTIDE LINKINGC9 H12 N O6 PTYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.15 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.216 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.472α = 90
b = 170.211β = 102.75
c = 124.579γ = 90
Software Package:
Software NamePurpose
Aimlessdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
PHENIXphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-12-16
    Type: Initial release