3LU8

Human serum albumin in complex with compound 3

• PDB DOI: https://doi.org/10.2210/pdb3LU8/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 2010-02-17 Released: 2010-10-27 
• Deposition Author(s): Buttar, D., Colclough, N., Gerhardt, S., MacFaul, P.A., Phillips, S.D., Plowright, A., Whittamore, P., Tam, K., Maskos, K., Steinbacher, S., Steuber, H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.266 
• R-Value Work: 0.245 
• R-Value Observed: 0.246 

Literature

A combined spectroscopic and crystallographic approach to probing drug-human serum albumin interactions

Buttar, D., Colclough, N., Gerhardt, S., Macfaul, P.A., Phillips, S.D., Plowright, A., Whittamore, P., Tam, K., Maskos, K., Steinbacher, S., Steuber, H.

(2010) Bioorg Med Chem 18: 7486-7496

• PubMed: 20869876 
• DOI: https://doi.org/10.1016/j.bmc.2010.08.052
• Primary Citation of Related Structures:  
  3LU6, 3LU7, 3LU8


• PubMed Abstract: 
  

  The displacement of probes that bind selectively to subdomains IIA or IIIA on human serum albumin (HSA) by competing compounds has been followed using fluorescence spectroscopy, and has therefore been used to assign a primary binding site for these compounds in the presence and absence of fatty acids. The crystal structures have also been solved for three compounds: a matched pair of carboxylic acids whose binding strength to HSA unexpectedly decreased as the lipophilicity increased; and a highly bound sulphonamide that appeared not to displace the probes in the displacement assay. The crystallography results support the findings from the fluorescence displacement assay. The results indicate that drug binding to subdomain IB might also be important location for certain compounds.

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Organizational Affiliation: 

AstraZeneca, Alderley Park, Macclesfield, Cheshire SK104TG, England, United Kingdom.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 134.03 kDa 
• Atom Count: 9,282 
• Modelled Residue Count: 1,151 
• Deposited Residue Count: 1,170 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Serum albumin	A, B	585	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 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
IQX	C [auth A], D [auth B]	N-[5-(5-{[(2,4-dimethyl-1,3-thiazol-5-yl)sulfonyl]amino}-6-fluoropyridin-3-yl)-4-methyl-1,3-thiazol-2-yl]acetamide C16 H16 F N5 O3 S3 IGQXOMRFMBZFBD-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.266 
• R-Value Work: 0.245 
• R-Value Observed: 0.246 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 58.779	α = 75.42
b = 59.031	β = 88.06
c = 96.177	γ = 76.91

Software Package:

Software Name	Purpose
MOSFLM	data reduction
MOLREP	phasing
REFMAC	refinement
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-10-27 
Deposition Author(s): Buttar, D., Colclough, N., Gerhardt, S., MacFaul, P.A., Phillips, S.D., Plowright, A., Whittamore, P., Tam, K., Maskos, K., Steinbacher, S., Steuber, H.

Revision History  

• Version 1.0: 2010-10-27
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2024-11-20
  Changes: Data collection, Database references, Derived calculations, Structure summary