4ZTF

Crystal Structure of the Prototype Foamy Virus Intasome with a 2-Pyridinone Aminal Inhibitor

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 

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Literature

Discovery of 2-Pyridinone Aminals: A Prodrug Strategy to Advance a Second Generation of HIV-1 Integrase Strand Transfer Inhibitors.

Raheem, I.T., Walji, A.M., Klein, D., Sanders, J.M., Powell, D.A., Abeywickrema, P., Barbe, G., Bennet, A., Clas, S.D., Dubost, D., Embrey, M., Grobler, J., Hafey, M.J., Hartingh, T.J., Hazuda, D.J., Miller, M.D., Moore, K.P., Pajkovic, N., Patel, S., Rada, V., Rearden, P., Schreier, J.D., Sisko, J., Steele, T.G., Truchon, J.F., Wai, J., Xu, M., Coleman, P.J.

(2015) J Med Chem 58: 8154-8165

  • DOI: https://doi.org/10.1021/acs.jmedchem.5b01037
  • Primary Citation of Related Structures:  
    4ZTF, 4ZTJ

  • PubMed Abstract: 

    • The search for new molecular constructs that resemble the critical two-metal binding pharmacophore required for HIV integrase strand transfer inhibition represents a vibrant area of research within drug discovery. Here we present the discovery of a new class of HIV integrase strand transfer inhibitors based on the 2-pyridinone core of MK-0536 ...

    The search for new molecular constructs that resemble the critical two-metal binding pharmacophore required for HIV integrase strand transfer inhibition represents a vibrant area of research within drug discovery. Here we present the discovery of a new class of HIV integrase strand transfer inhibitors based on the 2-pyridinone core of MK-0536. These efforts led to the identification of two lead compounds with excellent antiviral activity and preclinical pharmacokinetic profiles to support a once-daily human dose prediction. Dose escalating PK studies in dog revealed significant issues with limited oral absorption and required an innovative prodrug strategy to enhance the high-dose plasma exposures of the parent molecules.

    Organizational Affiliation: 

    Merck Frosst Centre for Therapeutic Research , Kirkland, QC Canada.



Macromolecules

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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Integrase
A, B
395Human spumaretrovirusMutation(s): 2 
Gene Names: pol
EC: 2.7.7.49 (UniProt), 2.7.7.7 (UniProt), 3.1.26.4 (UniProt), 3.4.23 (UniProt), 2.7.7 (UniProt), 3.1 (UniProt)
UniProt
Find proteins for P14350 (Human spumaretrovirus)
Explore P14350 
Go to UniProtKB:  P14350
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP14350
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganismImage
19 NUCLEOTIDE PREPROCESSED PFV DONOR DNA (NON-TRANSFERRED STRAND)19Human spumaretrovirus
Protein Feature View
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsLengthOrganismImage
17 NUCLEOTIDE PREPROCESSED PFV DONOR DNA (TRANSFERRED STRAND)17Human spumaretrovirus
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
X2P
Query on X2P
Download Ideal Coordinates CCD File 
H [auth A](1R,2R,5S)-8'-(3-chloro-4-fluorobenzyl)-6'-hydroxy-2'-[(2S)-2-hydroxypropyl]-9',10'-dihydro-2'H-spiro[bicyclo[3.1.0]hexane-2,3'-imidazo[5,1-a][2,6]naphthyridine]-1',5',7'(8'H)-trione
C25 H25 Cl F N3 O5
SUYSDXIXCVFTRC-UCVJIWRCSA-N		 Ligand Interaction
SO4
Query on SO4
Download Ideal Coordinates CCD File 
K [auth A],
L [auth A],
N [auth B]		SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L		 Ligand Interaction
GOL
Query on GOL
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F [auth A],
G [auth A],
M [auth A],
P [auth C]		GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
ZN
Query on ZN
Download Ideal Coordinates CCD File 
E [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
MG
Query on MG
Download Ideal Coordinates CCD File 
I [auth A],
J [auth A],
O [auth B]		MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 159.45α = 90
b = 159.45β = 90
c = 124.09γ = 90
Software Package:
Software NamePurpose
Aimlessdata scaling
BUSTER-TNTrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-10-07
    Type: Initial release
  • Version 1.1: 2015-11-04
    Changes: Database references