3V08

Crystal structure of Equine Serum Albumin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.206 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

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.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Serum albumin583Equus caballusMutation(s): 0 
UniProt
Find proteins for P35747 (Equus caballus)
Explore P35747 
Go to UniProtKB:  P35747
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP35747
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
PG4
Query on PG4

Download Ideal Coordinates CCD File 
EA [auth A]TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
SO4
Query on SO4

Download Ideal Coordinates CCD File 
H [auth A]
I [auth A]
J [auth A]
K [auth A]
L [auth A]
H [auth A],
I [auth A],
J [auth A],
K [auth A],
L [auth A],
N [auth A]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
BR
Query on BR

Download Ideal Coordinates CCD File 
B [auth A]
C [auth A]
CA [auth A]
D [auth A]
DA [auth A]
B [auth A],
C [auth A],
CA [auth A],
D [auth A],
DA [auth A],
E [auth A],
F [auth A],
FA [auth A],
G [auth A],
M [auth A],
O [auth A]
BROMIDE ION
Br
CPELXLSAUQHCOX-UHFFFAOYSA-M
EDO
Query on EDO

Download Ideal Coordinates CCD File 
P [auth A]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
UNX
Query on UNX

Download Ideal Coordinates CCD File 
AA [auth A]
BA [auth A]
Q [auth A]
R [auth A]
S [auth A]
AA [auth A],
BA [auth A],
Q [auth A],
R [auth A],
S [auth A],
T [auth A],
U [auth A],
V [auth A],
W [auth A],
X [auth A],
Y [auth A],
Z [auth A]
UNKNOWN ATOM OR ION
X
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.206 
  • Space Group: P 61
  • Diffraction Data: https://doi.org/10.18430/M3TS3F
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 94.621α = 90
b = 94.621β = 90
c = 142.564γ = 120
Software Package:
Software NamePurpose
HKL-3000data collection
HKL-3000phasing
REFMACrefinement
Cootmodel building
HKL-3000data reduction
HKL-3000data scaling

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2012-01-11
    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