1TEV

Crystal structure of the human UMP/CMP kinase in open conformation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Substrate-induced Conformational Changes in Human UMP/CMP Kinase.

Sekulic, N.Ort, S.Konrad, M.Lavie, A.

(2004) J.Biol.Chem. 279: 33882-33889

  • DOI: 10.1074/jbc.M401989200

  • PubMed Abstract: 
  • Human UMP/CMP kinase plays a crucial role in supplying precursors for nucleic acid synthesis by catalyzing the conversion of UMP, CMP, and dCMP into their diphosphate form. In addition, this kinase is an essential component of the activation cascade ...

    Human UMP/CMP kinase plays a crucial role in supplying precursors for nucleic acid synthesis by catalyzing the conversion of UMP, CMP, and dCMP into their diphosphate form. In addition, this kinase is an essential component of the activation cascade of medicinally relevant nucleoside analog prodrugs such as AraC, gemcitabine, and ddC. During the catalytic cycle the enzyme undergoes large conformational changes from open in the absence of substrates to closed in the presence of both phosphoryl donor and phosphoryl acceptor. Here we report the crystal structure of the substrate-free, open form of human UMP/CMP kinase. Comparison of the open structure with the closed state previously reported for the similar Dictyostelium discoideum UMP/CMP kinase reveals the conformational changes that occur upon substrate binding. We observe a classic example of induced fit where substrate-induced conformational changes in hinge residues result in rigid body movements of functional domains to form the catalytically competent state. In addition, a homology model of the human enzyme in the closed state based on the structure of D. discoideum UMP/CMP kinase aids to rationalize the substrate specificity of the human enzyme.


    Organizational Affiliation

    University of Illinois at Chicago, Department of Biochemistry and Molecular Genetics, Chicago, Illinois 60607, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
UMP-CMP kinase
A
196Homo sapiensMutation(s): 0 
Gene Names: CMPK1 (CMK, CMPK, UCK, UMK, UMPK)
EC: 2.7.4.14
Find proteins for P30085 (Homo sapiens)
Go to Gene View: CMPK1
Go to UniProtKB:  P30085
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.216 
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 62.750α = 90.00
b = 62.750β = 90.00
c = 226.310γ = 120.00
Software Package:
Software NamePurpose
XDSdata scaling
MOLREPphasing
MAR345data collection
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-06-22
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description