2YDF

HUMAN SERUM ALBUMIN COMPLEXED WITH IOPHENOXIC ACID


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystallographic Analysis Reveals the Structural Basis of the High-Affinity Binding of Iophenoxic Acid to Human Serum Albumin.

Ryan, A.J.Chung, C.W.Curry, S.

(2011) Bmc Struct.Biol. 11: 18

  • DOI: 10.1186/1472-6807-11-18

  • PubMed Abstract: 
  • Iophenoxic acid is an iodinated radiocontrast agent that was withdrawn from clinical use because of its exceptionally long half-life in the body, which was due in part to its high-affinity binding to human serum albumin (HSA). It was replaced by Iopa ...

    Iophenoxic acid is an iodinated radiocontrast agent that was withdrawn from clinical use because of its exceptionally long half-life in the body, which was due in part to its high-affinity binding to human serum albumin (HSA). It was replaced by Iopanoic acid, which has an amino rather than a hydroxyl group at position 3 on the iodinated benzyl ring and, as a result, binds to albumin with lower affinity and is excreted more rapidly from the body. To understand how iophenoxic acid binds so tightly to albumin, we wanted to examine the structural basis of its interaction with HSA.


    Organizational Affiliation

    Biophysics Section, Blackett Laboratory, Imperial College, Exhibition Road, London, SW7 2AZ, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SERUM ALBUMIN
A, B
585Homo sapiensMutation(s): 0 
Gene Names: ALB
Find proteins for P02768 (Homo sapiens)
Go to Gene View: ALB
Go to UniProtKB:  P02768
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IO3
Query on IO3

Download SDF File 
Download CCD File 
A, B
IOPHENOXIC ACID
C11 H11 I3 O3
GOIQOQCNFWYSTQ-YFKPBYRVSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
IO3Kd: 22 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.207 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 55.072α = 81.00
b = 55.440β = 90.83
c = 119.845γ = 64.52
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2011-03-18 
  • Released Date: 2011-04-27 
  • Deposition Author(s): Ryan, A.J., Curry, S.

Revision History 

  • Version 1.0: 2011-04-27
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance