4ZHD

Siderocalin-mediated recognition and cellular uptake of actinides


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Siderocalin-mediated recognition, sensitization, and cellular uptake of actinides.

Allred, B.E.Rupert, P.B.Gauny, S.S.An, D.D.Ralston, C.Y.Sturzbecher-Hoehne, M.Strong, R.K.Abergel, R.J.

(2015) Proc.Natl.Acad.Sci.USA 112: 10342-10347

  • DOI: 10.1073/pnas.1508902112
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Synthetic radionuclides, such as the transuranic actinides plutonium, americium, and curium, present severe health threats as contaminants, and understanding the scope of the biochemical interactions involved in actinide transport is instrumental in ...

    Synthetic radionuclides, such as the transuranic actinides plutonium, americium, and curium, present severe health threats as contaminants, and understanding the scope of the biochemical interactions involved in actinide transport is instrumental in managing human contamination. Here we show that siderocalin, a mammalian siderophore-binding protein from the lipocalin family, specifically binds lanthanide and actinide complexes through molecular recognition of the ligands chelating the metal ions. Using crystallography, we structurally characterized the resulting siderocalin-transuranic actinide complexes, providing unprecedented insights into the biological coordination of heavy radioelements. In controlled in vitro assays, we found that intracellular plutonium uptake can occur through siderocalin-mediated endocytosis. We also demonstrated that siderocalin can act as a synergistic antenna to sensitize the luminescence of trivalent lanthanide and actinide ions in ternary protein-ligand complexes, dramatically increasing the brightness and efficiency of intramolecular energy transfer processes that give rise to metal luminescence. Our results identify siderocalin as a potential player in the biological trafficking of f elements, but through a secondary ligand-based metal sequestration mechanism. Beyond elucidating contamination pathways, this work is a starting point for the design of two-stage biomimetic platforms for photoluminescence, separation, and transport applications.


    Organizational Affiliation

    Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Neutrophil gelatinase-associated lipocalin
A, B, C
180Homo sapiensMutation(s): 1 
Gene Names: LCN2 (HNL, NGAL)
Find proteins for P80188 (Homo sapiens)
Go to Gene View: LCN2
Go to UniProtKB:  P80188
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
4OZ
Query on 4OZ

Download SDF File 
Download CCD File 
A, B, C
methyl N-(2,3-dihydroxybenzoyl)-O-formyl-L-serinate
C12 H13 N O7
SHACLOMOOCNGDP-QMMMGPOBSA-N
 Ligand Interaction
SO4
Query on SO4

Download SDF File 
Download CCD File 
C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, C
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
4PU
Query on 4PU

Download SDF File 
Download CCD File 
A, B, C
PLUTONIUM ION
Pu
IYQHAABWBDVIEE-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.204 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 114.589α = 90.00
b = 114.589β = 90.00
c = 118.781γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
REFMACphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-08-05
    Type: Initial release
  • Version 1.1: 2015-08-19
    Type: Database references
  • Version 1.2: 2015-09-02
    Type: Database references