3HNE

Crystal structure of human ribonucleotide reductase 1 bound to the effectors TTP and ATP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.11 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for allosteric regulation of human ribonucleotide reductase by nucleotide-induced oligomerization.

Fairman, J.W.Wijerathna, S.R.Ahmad, M.F.Xu, H.Nakano, R.Jha, S.Prendergast, J.Welin, R.M.Flodin, S.Roos, A.Nordlund, P.Li, Z.Walz, T.Dealwis, C.G.

(2011) Nat.Struct.Mol.Biol. 18: 316-322

  • DOI: 10.1038/nsmb.2007
  • Primary Citation of Related Structures:  2WGH, 3HNC, 3HND, 3HNF, 3PAW

  • PubMed Abstract: 
  • Ribonucleotide reductase (RR) is an α(n)β(n) (RR1-RR2) complex that maintains balanced dNTP pools by reducing NDPs to dNDPs. RR1 is the catalytic subunit, and RR2 houses the free radical required for catalysis. RR is allosterically regulated by its a ...

    Ribonucleotide reductase (RR) is an α(n)β(n) (RR1-RR2) complex that maintains balanced dNTP pools by reducing NDPs to dNDPs. RR1 is the catalytic subunit, and RR2 houses the free radical required for catalysis. RR is allosterically regulated by its activator ATP and its inhibitor dATP, which regulate RR activity by inducing oligomerization of RR1. Here, we report the first X-ray structures of human RR1 bound to TTP alone, dATP alone, TTP-GDP, TTP-ATP, and TTP-dATP. These structures provide insights into regulation of RR by ATP or dATP. At physiological dATP concentrations, RR1 forms inactive hexamers. We determined the first X-ray structure of the RR1-dATP hexamer and used single-particle electron microscopy to visualize the α(6)-ββ'-dATP holocomplex. Site-directed mutagenesis and functional assays confirm that hexamerization is a prerequisite for inhibition by dATP. Our data indicate a mechanism for regulating RR activity by dATP-induced oligomerization.


    Organizational Affiliation

    Department of Biochemistry, University of Tennessee, Knoxville, TN, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ribonucleoside-diphosphate reductase large subunit
A, B
792Homo sapiensGene Names: RRM1 (RR1)
EC: 1.17.4.1
Find proteins for P23921 (Homo sapiens)
Go to Gene View: RRM1
Go to UniProtKB:  P23921
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download SDF File 
Download CCD File 
B
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
SO4
Query on SO4

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Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
TTP
Query on TTP

Download SDF File 
Download CCD File 
A, B
THYMIDINE-5'-TRIPHOSPHATE
C10 H17 N2 O14 P3
NHVNXKFIZYSCEB-XLPZGREQSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.11 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.185 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 69.147α = 90.00
b = 114.372β = 90.00
c = 222.474γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
MAR345data collection
PHASERphasing
SCALEPACKdata scaling
DENZOdata reduction
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-02-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-01
    Type: Advisory, Refinement description