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 
  • R-Value Observed: 0.270 

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This is version 1.3 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:  
    1E78, 1E7B, 1E7A, 1E7C

  • 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 distribution and pharmacokinetics; however, there have as yet been no high resolution crystal structures published of drug-albumin complexes ...

    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
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SERUM ALBUMIN A, B585Homo sapiensMutation(s): 0 
Gene Names: ALB, GIG20, GIG42, PRO0903, PRO1708, PRO2044, PRO2619, PRO2675, UNQ696/PRO1341
Find proteins for P02768 (Homo sapiens)
Explore P02768 
Go to UniProtKB:  P02768
NIH Common Fund Data Resources
PHAROS:  P02768
GTEx:  ENSG00000163631
Protein Feature View
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  • Reference Sequence
Small Molecules
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
HLTIC50:  2900000   nM  BindingDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.38 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.270 
  • R-Value Observed: 0.270 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.58α = 81.39
b = 54.96β = 90.79
c = 120γ = 65.55
Software Package:
Software NamePurpose
X-PLORrefinement
MOSFLMdata reduction
CCP4data scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-01-17
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-07-24
    Changes: Data collection