5IXA

HCMV DNA polymerase processivity subunit UL44 at neutral pH and low salt


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.684 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A Small Covalent Allosteric Inhibitor of Human Cytomegalovirus DNA Polymerase Subunit Interactions.

Chen, H.Coseno, M.Ficarro, S.B.Mansueto, M.S.Komazin-Meredith, G.Boissel, S.Filman, D.J.Marto, J.A.Hogle, J.M.Coen, D.M.

(2017) ACS Infect Dis 3: 112-118

  • DOI: 10.1021/acsinfecdis.6b00079
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Human cytomegalovirus DNA polymerase comprises a catalytic subunit, UL54, and an accessory subunit, UL44, the interaction of which may serve as a target for the development of new antiviral drugs. Using a high-throughput screen, we identified a small ...

    Human cytomegalovirus DNA polymerase comprises a catalytic subunit, UL54, and an accessory subunit, UL44, the interaction of which may serve as a target for the development of new antiviral drugs. Using a high-throughput screen, we identified a small molecule, (5-((dimethylamino)methylene-3-(methylthio)-6,7-dihydrobenzo[c]thiophen-4(5H)-one), that selectively inhibits the interaction of UL44 with a UL54-derived peptide in a time-dependent manner, full-length UL54, and UL44-dependent long-chain DNA synthesis. A crystal structure of the compound bound to UL44 revealed a covalent reaction with lysine residue 60 and additional noncovalent interactions that cause steric conflicts that would prevent the UL44 connector loop from interacting with UL54. Analyses of the reaction of the compound with model substrates supported a resonance-stabilized conjugation mechanism, and substitution of the lysine reduced the ability of the compound to inhibit UL44-UL54 peptide interactions. This novel covalent inhibitor of polymerase subunit interactions may serve as a starting point for new, needed drugs to treat human cytomegalovirus infections.


    Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School , 250 Longwood Avenue, Boston, Massachusetts 02115, United States.,Department of Cancer Biology and Blais Proteomics Center, Dana-Farber Cancer Institute , 450 Brookline Avenue, Boston, Massachusetts 02215, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA polymerase processivity factor
A, B
290Human cytomegalovirus (strain AD169)Mutation(s): 0 
Gene Names: UL44
Find proteins for P16790 (Human cytomegalovirus (strain AD169))
Go to UniProtKB:  P16790
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.684 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.210 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 75.026α = 90.00
b = 100.829β = 90.00
c = 109.639γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
PHENIXrefinement
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesAI19838

Revision History 

  • Version 1.0: 2016-11-30
    Type: Initial release
  • Version 1.1: 2017-03-01
    Type: Database references
  • Version 1.2: 2017-09-20
    Type: Author supporting evidence