1BKE

HUMAN SERUM ALBUMIN IN A COMPLEX WITH MYRISTIC ACID AND TRI-IODOBENZOIC ACID

• PDB DOI: https://doi.org/10.2210/pdb1BKE/pdb

• Classification: PLASMA PROTEIN
• Organism(s): Homo sapiens
• Expression System: Saccharomyces cerevisiae
• Mutation(s): No 


• Deposited: 1998-07-06 Released: 1999-01-13 
• Deposition Author(s): Curry, S., Mandelkow, H., Brick, P., Franks, N.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.15 Å
• R-Value Free: 0.248 
• R-Value Work: 0.177 
• R-Value Observed: 0.177 

Starting Model: experimental

Literature

Crystal structure of human serum albumin complexed with fatty acid reveals an asymmetric distribution of binding sites.

Curry, S., Mandelkow, H., Brick, P., Franks, N.

(1998) Nat Struct Biol 5: 827-835

• PubMed: 9731778 
• DOI: https://doi.org/10.1038/1869
• Primary Citation of Related Structures:  
  1BJ5, 1BKE


• PubMed Abstract: 
  

  Human serum albumin (HSA) is the most abundant protein in the circulatory system. Its principal function is to transport fatty acids, but it is also capable of binding a great variety of metabolites and drugs. Despite intensive efforts, the detailed structural basis of fatty acid binding to HSA has remained elusive. We have now determined the crystal structure of HSA complexed with five molecules of myristate at 2.5 A resolution. The fatty acid molecules bind in long, hydrophobic pockets capped by polar side chains, many of which are basic. These pockets are distributed asymmetrically throughout the HSA molecule, despite its symmetrical repeating domain structure.

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Organizational Affiliation: 

Blackett Laboratory, Imperial College, London, UK. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 68.28 kDa 
• Atom Count: 4,562 
• Modelled Residue Count: 581 
• Deposited Residue Count: 581 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SERUM ALBUMIN	A	581	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P02768 (Homo sapiens) Explore P02768  Go to UniProtKB:  P02768
PHAROS:  P02768 GTEx:  ENSG00000163631

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
B3I	G [auth A], H [auth A]	2,3,5-TRIIODOBENZOIC ACID C7 H3 I3 O2 ZMZGFLUUZLELNE-UHFFFAOYSA-N
MYR	B [auth A], C [auth A], D [auth A], E [auth A], F [auth A]	MYRISTIC ACID C14 H28 O2 TUNFSRHWOTWDNC-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.15 Å
• R-Value Free: 0.248 
• R-Value Work: 0.177 
• R-Value Observed: 0.177 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 187.65	α = 90
b = 38.87	β = 105.49
c = 95.91	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
CCP4	data reduction
X-PLOR	model building
X-PLOR	refinement
CCP4	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-01-13 
Deposition Author(s): Curry, S., Mandelkow, H., Brick, P., Franks, N.

Revision History  

• Version 1.0: 1999-01-13
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-08-02
  Changes: Database references, Derived calculations, Refinement description
• Version 1.4: 2024-10-09
  Changes: Data collection, Structure summary