1B7Z

STRUCTURE OF OXALATE SUBSTITUTED DIFERRIC MARE LACTOFERRIN FROM COLOSTRUM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.213 

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This is version 1.3 of the entry. See complete history


Literature

Structure of oxalate-substituted diferric mare lactoferrin at 2.7 A resolution.

Sharma, A.K.Singh, T.P.

(1999) Acta Crystallogr D Biol Crystallogr 55: 1792-1798

  • DOI: 10.1107/s0907444999009439
  • Primary Citation of Related Structures:  
    1B7Z

  • PubMed Abstract: 
  • Lactoferrin binds two Fe(3+) and two CO(2-)(3) ions with high affinity. It can also bind other metal ions and anions. In order to determine the perturbations in the environments of the binding sites in the N and C lobes and elsewhere in the protein, the crystal structure of oxalate-substituted diferric mare lactoferrin has been determined at 2 ...

    Lactoferrin binds two Fe(3+) and two CO(2-)(3) ions with high affinity. It can also bind other metal ions and anions. In order to determine the perturbations in the environments of the binding sites in the N and C lobes and elsewhere in the protein, the crystal structure of oxalate-substituted diferric mare lactoferrin has been determined at 2.7 A resolution. The final model has a crystallographic R factor of 21.3% for all data in the resolution range 17.0-2.7 A. The substitution of an oxalate anion does not perturb the overall structure of the protein, but produces several significant changes at the metal-binding and anion-binding sites. The binding of the oxalate anion is symmetrical in both the N and C lobes, unlike in diferric dioxalate human lactoferrin, where the oxalate anion binds the metal ion symmetrically in the C lobe and asymmetrically in the N lobe.


    Related Citations: 
    • Purification, crystallization and preliminary crystallographic analysis of mare lactoferrin.
      Sharma, A.K., Kathikeyan, S., Kaur, P., Singh, T.P., Yadav, M.P.
      (1996) Acta Crystallogr D Biol Crystallogr 52: 1196

    Organizational Affiliation

    Department of Biophysics, All India Institute of Medical Sciences, New Delhi 110 029, India.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEIN (LACTOFERRIN)A689Equus caballusMutation(s): 0 
Gene Names: LTF
EC: 3.4.21
UniProt
Find proteins for O77811 (Equus caballus)
Explore O77811 
Go to UniProtKB:  O77811
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OXL
Query on OXL

Download Ideal Coordinates CCD File 
D [auth A], E [auth A]OXALATE ION
C2 O4
MUBZPKHOEPUJKR-UHFFFAOYSA-L
 Ligand Interaction
FE
Query on FE

Download Ideal Coordinates CCD File 
B [auth A], C [auth A]FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.213 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.524α = 90
b = 99.798β = 90
c = 103.935γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
X-PLORrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-02-02
    Type: Initial release
  • Version 1.1: 2008-04-26
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-10-30
    Changes: Data collection, Database references