Crystal structure of Bovine Serum Albumin

Experimental Data Snapshot

  • Resolution: 2.70 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.205 

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Structural and immunologic characterization of bovine, horse, and rabbit serum albumins.

Majorek, K.A.Porebski, P.J.Dayal, A.Zimmerman, M.D.Jablonska, K.Stewart, A.J.Chruszcz, M.Minor, W.

(2012) Mol Immunol 52: 174-182

  • DOI: https://doi.org/10.1016/j.molimm.2012.05.011
  • Primary Citation of Related Structures:  
    3V03, 3V08, 3V09

  • PubMed Abstract: 

    Serum albumin (SA) is the most abundant plasma protein in mammals. SA is a multifunctional protein with extraordinary ligand binding capacity, making it a transporter molecule for a diverse range of metabolites, drugs, nutrients, metals and other molecules. Due to its ligand binding properties, albumins have wide clinical, pharmaceutical, and biochemical applications. Albumins are also allergenic, and exhibit a high degree of cross-reactivity due to significant sequence and structure similarity of SAs from different organisms. Here we present crystal structures of albumins from cattle (BSA), horse (ESA) and rabbit (RSA) sera. The structural data are correlated with the results of immunological studies of SAs. We also analyze the conservation or divergence of structures and sequences of SAs in the context of their potential allergenicity and cross-reactivity. In addition, we identified a previously uncharacterized ligand binding site in the structure of RSA, and calcium binding sites in the structure of BSA, which is the first serum albumin structure to contain metal ions.

  • Organizational Affiliation

    Department of Molecular Physiology and Biological Physics, University of Virginia, Charlottesville, VA 22908, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serum albumin
A, B
583Bos taurusMutation(s): 1 
Find proteins for P02769 (Bos taurus)
Explore P02769 
Go to UniProtKB:  P02769
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02769
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 215.661α = 90
b = 45.096β = 114.01
c = 142.408γ = 90
Software Package:
Software NamePurpose
BLU-MAXdata collection
HKL-3000data reduction
HKL-3000data scaling

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2012-01-04
    Type: Initial release
  • Version 1.1: 2012-10-10
    Changes: Database references
  • Version 1.2: 2022-04-13
    Changes: Database references, Derived calculations, Structure summary
  • Version 1.3: 2023-09-13
    Changes: Data collection, Refinement description