3KJ7

Crystal Structure of the Complex of C-lobe of Bovine Lactoferrin with Dextrin at 1.9 A Resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Specific interactions of C-terminal half (C-lobe) of lactoferrin protein with edible sugars: binding and structural studies with implications on diabetes.

Mir, R.Kumar, R.P.Singh, N.Vikram, G.P.Sinha, M.Bhushan, A.Kaur, P.Srinivasan, A.Sharma, S.Singh, T.P.

(2010) Int J Biol Macromol 47: 50-59

  • DOI: 10.1016/j.ijbiomac.2010.03.021
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Bovine lactoferrin has been shown to reduce the levels of glucose in both normal subjects and non-insulin dependent diabetic patients. The binding studies have shown that various sugar molecules interact with lactoferrin indicating the presence of a ...

    Bovine lactoferrin has been shown to reduce the levels of glucose in both normal subjects and non-insulin dependent diabetic patients. The binding studies have shown that various sugar molecules interact with lactoferrin indicating the presence of a sugar-binding site in the protein. Structural studies have revealed that the sugar-binding site is located in the C-terminal half (C-lobe) of bilobal lactoferrin. Since the sugar-binding site was part of the C-lobe, it was better to carry out binding and structural studies using C-lobe rather than the full protein molecule. Therefore, C-lobe was prepared by limited proteolysis of lactoferrin with enzyme proteinase K. It was purified to homogeneity for further studies. The addition of C-lobe to human serum showed significant lowering of glucose levels. The binding studies using C-lobe with nine sugars, glucose, galactose, mannose, xylose, maltose, cellobiose, lactose, sucrose and dextrin gave values of binding constants in the range of 10(-4) to 10(-5)M. The structure determinations of the complexes of C-lobe with all the nine sugars showed that all of them interact with C-lobe through the same recognition site involving several hydrogen bonds and van der Waals interactions.


    Organizational Affiliation

    Department of Biophysics, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110029, India.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lactotransferrin
A
345Bos taurusMutation(s): 0 
Gene Names: LTF
EC: 3.4.21
Find proteins for P24627 (Bos taurus)
Go to UniProtKB:  P24627
Small Molecules
Ligands 7 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CTR
Query on CTR

Download CCD File 
A
CELLOTRIOSE
C18 H32 O16
FYGDTMLNYKFZSV-RZDZXANRSA-N
 Ligand Interaction
NAG
Query on NAG

Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
MAN
Query on MAN

Download CCD File 
A
ALPHA-D-MANNOSE
C6 H12 O6
WQZGKKKJIJFFOK-PQMKYFCFSA-N
 Ligand Interaction
SO4
Query on SO4

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

Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CO3
Query on CO3

Download CCD File 
A
CARBONATE ION
C O3
BVKZGUZCCUSVTD-UHFFFAOYSA-L
 Ligand Interaction
FE
Query on FE

Download CCD File 
A
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.211 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.81α = 90
b = 50.134β = 107.1
c = 65.545γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
MOLREPphasing
REFMACrefinement
AUTOMARdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-02-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-09-07
    Changes: Database references