4KCG

Human dCK C4S-S74E mutant in complex with UDP and the DI-39 inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.09 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Co-targeting of convergent nucleotide biosynthetic pathways for leukemia eradication.

Nathanson, D.A.Armijo, A.L.Tom, M.Li, Z.Dimitrova, E.Austin, W.R.Nomme, J.Campbell, D.O.Ta, L.Le, T.M.Lee, J.T.Darvish, R.Gordin, A.Wei, L.Liao, H.I.Wilks, M.Martin, C.Sadeghi, S.Murphy, J.M.Boulos, N.Phelps, M.E.Faull, K.F.Herschman, H.R.Jung, M.E.Czernin, J.Lavie, A.Radu, C.G.

(2014) J.Exp.Med. 211: 473-486

  • DOI: 10.1084/jem.20131738

  • PubMed Abstract: 
  • Pharmacological targeting of metabolic processes in cancer must overcome redundancy in biosynthetic pathways. Deoxycytidine (dC) triphosphate (dCTP) can be produced both by the de novo pathway (DNP) and by the nucleoside salvage pathway (NSP). Howeve ...

    Pharmacological targeting of metabolic processes in cancer must overcome redundancy in biosynthetic pathways. Deoxycytidine (dC) triphosphate (dCTP) can be produced both by the de novo pathway (DNP) and by the nucleoside salvage pathway (NSP). However, the role of the NSP in dCTP production and DNA synthesis in cancer cells is currently not well understood. We show that acute lymphoblastic leukemia (ALL) cells avoid lethal replication stress after thymidine (dT)-induced inhibition of DNP dCTP synthesis by switching to NSP-mediated dCTP production. The metabolic switch in dCTP production triggered by DNP inhibition is accompanied by NSP up-regulation and can be prevented using DI-39, a new high-affinity small-molecule inhibitor of the NSP rate-limiting enzyme dC kinase (dCK). Positron emission tomography (PET) imaging was useful for following both the duration and degree of dCK inhibition by DI-39 treatment in vivo, thus providing a companion pharmacodynamic biomarker. Pharmacological co-targeting of the DNP with dT and the NSP with DI-39 was efficacious against ALL models in mice, without detectable host toxicity. These findings advance our understanding of nucleotide metabolism in leukemic cells, and identify dCTP biosynthesis as a potential new therapeutic target for metabolic interventions in ALL and possibly other hematological malignancies.


    Organizational Affiliation

    Department of Molecular and Medical Pharmacology; 2 Ahmanson Translational Imaging Division; 3 Department of Biomathematics; 4 The Pasarow Mass Spectrometry Laboratory, Department of Psychiatry and Biobehavioral Sciences and the Semel Institute for Neuroscience and Human Behavior; 5 Department of Biological Chemistry; and 6 Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Deoxycytidine kinase
A, B
280Homo sapiensMutation(s): 5 
Gene Names: DCK
EC: 2.7.1.74
Find proteins for P27707 (Homo sapiens)
Go to Gene View: DCK
Go to UniProtKB:  P27707
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1QC
Query on 1QC

Download SDF File 
Download CCD File 
A, B
N-{2-[5-(4-{[(4,6-diaminopyrimidin-2-yl)sulfanyl]methyl}-5-propyl-1,3-thiazol-2-yl)-2-methoxyphenoxy]ethyl}methanesulfonamide
C21 H28 N6 O4 S3
VWMTUHOSEYDVPP-UHFFFAOYSA-N
 Ligand Interaction
UDP
Query on UDP

Download SDF File 
Download CCD File 
A, B
URIDINE-5'-DIPHOSPHATE
C9 H14 N2 O12 P2
XCCTYIAWTASOJW-XVFCMESISA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1QCIC50: 4.9 - 14 nM (98) BINDINGDB
1QCKi: 0.5 nM (98) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.09 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.177 
  • Space Group: P 41
Unit Cell:
Length (Å)Angle (°)
a = 68.731α = 90.00
b = 68.731β = 90.00
c = 120.588γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
CrystalCleardata collection
XDSdata reduction
XDSdata scaling
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-04-24 
  • Released Date: 2014-03-12 
  • Deposition Author(s): Nomme, J., Lavie, A.

Revision History 

  • Version 1.0: 2014-03-12
    Type: Initial release
  • Version 1.1: 2014-04-16
    Type: Database references