5ORF

Structure of ovine serum albumin in P1 space group


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.54 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


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Literature

Crystal structures of serum albumins from domesticated ruminants and their complexes with 3,5-diiodosalicylic acid.

Bujacz, A.Talaj, J.A.Zielinski, K.Pietrzyk-Brzezinska, A.J.Neumann, P.

(2017) Acta Crystallogr D Struct Biol 73: 896-909

  • DOI: 10.1107/S205979831701470X
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Serum albumin (SA) is the most abundant protein in plasma and is the main transporter of molecules in the circulatory system of all vertebrates, with applications in medicine, the pharmaceutical industry and molecular biology. It is known that albumi ...

    Serum albumin (SA) is the most abundant protein in plasma and is the main transporter of molecules in the circulatory system of all vertebrates, with applications in medicine, the pharmaceutical industry and molecular biology. It is known that albumins from different organisms vary in sequence; thus, it is important to know the impact of the amino-acid sequence on the three-dimensional structure and ligand-binding properties. Here, crystal structures of ovine (OSA) and caprine (CSA) serum albumins, isolated from sheep and goat blood, are described, as well those of their complexes with 3,5-diiodosalicylic acid (DIS): OSA-DIS (2.20 Å resolution) and CSA-DIS (1.78 Å resolution). The ligand-free OSA structure was determined in the trigonal space group P3221 at 2.30 Å resolution, while that of CSA in the orthorhombic space group P212121 was determined at 1.94 Å resolution. Both albumins are also capable of crystallizing in the triclinic space group P1, giving isostructural crystals that diffract to around 2.5 Å resolution. A comparison of OSA and CSA with the closely related bovine serum albumin (BSA) shows both similarities and differences in the distribution of DIS binding sites. The investigated serum albumins from domesticated ruminants in their complexes with DIS are also compared with the analogous structures of equine and human serum albumins (ESA-DIS and HSA-DIS). Surprisingly, despite 98% sequence similarity, OSA binds only two molecules of DIS, whereas CSA binds six molecules of this ligand. Moreover, the binding of DIS to OSA and CSA introduced changes in the overall architecture of the proteins, causing not only different conformations of the amino-acid side chains in the binding pockets, but also a significant shift of the whole helices, changing the volume of the binding cavities.


    Organizational Affiliation

    Institute of Technical Biochemistry, Faculty of Biotechnology and Food Sciences, Lodz University of Technology, Stefanowskiego 4/10, 90-924 Lodz, Poland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Serum albumin
A, B, C, D
583Ovis ariesMutation(s): 0 
Gene Names: ALB
Find proteins for P14639 (Ovis aries)
Go to Gene View: ALB
Go to UniProtKB:  P14639
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PGE
Query on PGE

Download SDF File 
Download CCD File 
A, B, C, D
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

Download SDF File 
Download CCD File 
A, C
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
PRO
Query on PRO

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Download CCD File 
A, B, C, D
PROLINE
C5 H9 N O2
ONIBWKKTOPOVIA-BYPYZUCNSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.54 Å
  • R-Value Free: 0.258 
  • R-Value Work: 0.196 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 77.820α = 89.81
b = 78.050β = 74.54
c = 109.710γ = 73.15
Software Package:
Software NamePurpose
MOLREPphasing
XDSdata reduction
XDSdata scaling
REFMACrefinement

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
NCNPoland213/11/B/ST5/02271

Revision History 

  • Version 1.0: 2017-11-15
    Type: Initial release