1E7B

Crystal structure of human serum albumin complexed with the general anesthetic halothane

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.38 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.270 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Binding of the General Anesthetics Propofol and Halothane to Human Serum Albumin. High Resolution Crystal Structures

Bhattacharya, A.A., Curry, S., Franks, N.P.

(2000) J.Biol.Chem. 275: 38731

  • DOI: 10.1074/jbc.M005460200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Human serum albumin (HSA) is one of the most abundant proteins in the circulatory system and plays a key role in the transport of fatty acids, metabolites, and drugs. For many drugs, binding to serum albumin is a critical determinant of their distrib ...

    Human serum albumin (HSA) is one of the most abundant proteins in the circulatory system and plays a key role in the transport of fatty acids, metabolites, and drugs. For many drugs, binding to serum albumin is a critical determinant of their distribution and pharmacokinetics; however, there have as yet been no high resolution crystal structures published of drug-albumin complexes. Here we describe high resolution crystal structures of HSA with two of the most widely used general anesthetics, propofol and halothane. In addition, we describe a crystal structure of HSA complexed with both halothane and the fatty acid, myristate. We show that the intravenous anesthetic propofol binds at two discrete sites on HSA in preformed pockets that have been shown to accommodate fatty acids. Similarly we show that the inhalational agent halothane binds (at concentrations in the pharmacologically relevant range) at three sites that are also fatty acid binding loci. At much higher halothane concentrations, we have identified additional sites that are occupied. All of the higher affinity anesthetic binding sites are amphiphilic in nature, with both polar and apolar parts, and anesthetic binding causes only minor changes in local structure.

    Organizational Affiliation: 

    Biophysics Section, The Blackett Laboratory, Imperial College of Science, Technology and Medicine, London SW7 2BW, United Kingdom.




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
HLT
Query on HLT
Download SDF File 
Download CCD File 
A, B
2-BROMO-2-CHLORO-1,1,1-TRIFLUOROETHANE
C2 H Br Cl F3
BCQZXOMGPXTTIC-SFOWXEAESA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
HLTIC50: 2900000 nM (100) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.38 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.270 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 54.580α = 81.39
b = 54.960β = 90.79
c = 120.000γ = 65.55
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORrefinement
MOSFLMdata reduction
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-01-17
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance