6IP9

Crystal Structure of Lanthanum ion (La3+) bound bovine alpha-lactalbumin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.198 

wwPDB Validation   3D Report Full Report


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Literature

Cytotoxicity of apo bovine alpha-lactalbumin complexed with La3+on cancer cells supported by its high resolution crystal structure.

Yarramala, D.S.Prakash, P.Ranade, D.S.Doshi, S.Kulkarni, P.P.Bhaumik, P.Rao, C.P.

(2019) Sci Rep 9: 1780-1780

  • DOI: 10.1038/s41598-018-38024-1
  • Primary Citation of Related Structures:  
    6IP9

  • PubMed Abstract: 
  • Cancer remains one of the biggest threats to human society. There are massive demands for compounds to selectively kill cancerous cells. Earlier studies have shown that bovine α -lactalbumin made lethal to tumor cells (BAMLET) becomes cytotoxic against cancer cells in complex with oleic acid {Hoque, M ...

    Cancer remains one of the biggest threats to human society. There are massive demands for compounds to selectively kill cancerous cells. Earlier studies have shown that bovine α -lactalbumin made lethal to tumor cells (BAMLET) becomes cytotoxic against cancer cells in complex with oleic acid {Hoque, M. et. al., PLoSOne 8, e68390 (2013)}. In our study, we obtained bovine α-lactalbumin complexed with lanthanum ion (La 3+ -B-α-LA) and determined its high resolution crystal structure. The natural calcium binding site of bovine α-lactalbumin is replaced by lanthanum. The La 3+ complex formation by B-α-apo-LA was also supported by various biophysical methods. Interestingly, our complex, La 3+ -B-α-LA exhibits much greater anticancer activity against breast cancer cells as compared to the reported BAMLET-oleic acid complex. This study shows that La 3+ -B-α-LA complex is preferentially more toxic to MCF-7 cells as compared to KB (oral cancer) and HeLa (cervical) cells, while almost non-toxic to the healthy cells that we studied. Our data indicates that the cytotoxicity of La 3+ -B-α-LA against cancer cells is through apoptotic path way. The higher anticancer activity of La 3+ -B-α-LA is attributable to the requisite structural changes induced in the protein by La 3+ binding as supported by the crystal structure of the complex.


    Organizational Affiliation

    Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076, India. cprao@iitb.ac.in.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Alpha-lactalbuminA123Bos taurusMutation(s): 0 
Gene Names: LALBAALACTA
UniProt
Find proteins for P00711 (Bos taurus)
Explore P00711 
Go to UniProtKB:  P00711
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00711
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
LA
Query on LA

Download Ideal Coordinates CCD File 
D [auth A]LANTHANUM (III) ION
La
CZMAIROVPAYCMU-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
B [auth A]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
C [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.198 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.45α = 90
b = 47.45β = 90
c = 89.84γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
IndiaBT/RLF/Re-entry/42/2011

Revision History  (Full details and data files)

  • Version 1.0: 2019-02-20
    Type: Initial release