2O7N

CD11A (LFA1) I-domain complexed with 7A-[(4-cyanophenyl)methyl]-6-(3,5-dichlorophenyl)-5-oxo-2,3,5,7A-tetrahydro-1H-pyrrolo[1,2-A]pyrrole-7-carbonitrile

• PDB DOI: https://doi.org/10.2210/pdb2O7N/pdb

• Classification: CELL ADHESION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2006-12-11 Released: 2007-03-20 
• Deposition Author(s): Sheriff, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.234 
• R-Value Work: 0.215 
• R-Value Observed: 0.215 

Literature

Design of LFA-1 antagonists based on a 2,3-dihydro-1H-pyrrolizin-5(7aH)-one scaffold.

Dodd, D.S., Sheriff, S., Chang, C.J., Stetsko, D.K., Phillips, L.M., Zhang, Y., Launay, M., Potin, D., Vaccaro, W., Poss, M.A., McKinnon, M., Barrish, J.C., Suchard, S.J., Murali Dhar, T.G.

(2007) Bioorg Med Chem Lett 17: 1908-1911

• PubMed: 17291752 
• DOI: https://doi.org/10.1016/j.bmcl.2007.01.036
• Primary Citation of Related Structures:  
  2O7N


• PubMed Abstract: 
  

  A new class of lymphocyte function-associated antigen-1 (LFA-1) antagonists is described. Elaboration of the 2,3-dihydro-1H-pyrrolizin-5(7aH)-one scaffold resulted in the synthesis of potent inhibitors of the LFA-1/ICAM-1 interaction. Along with the in vitro activity, we present the X-ray crystal structure of the complex of compound 9b, in a novel binding mode to the I-domain of LFA-1.

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Organizational Affiliation: 

Bristol-Myers Squibb Pharmaceutical Research Institute, P.O. Box 4000, Princeton, NJ 08543-4000, USA. [e-mail]

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 21.34 kDa 
• Atom Count: 1,609 
• Modelled Residue Count: 180 
• Deposited Residue Count: 183 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Integrin alpha-L	A	183	Homo sapiens	Mutation(s): 0  Gene Names: ITGAL, CD11A
UniProt & NIH Common Fund Data Resources
Find proteins for P20701 (Homo sapiens) Explore P20701  Go to UniProtKB:  P20701
PHAROS:  P20701 GTEx:  ENSG00000005844

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
2O7	B [auth A]	7A-[(4-cyanophenyl)methyl]-6-(3,5-dichlorophenyl)-5-oxo-2,3,5,7A-tetrahydro-1H-pyrrolo[1,2-A]pyrrole-7-carbonitrile C22 H15 Cl2 N3 O TZCXQSNBTXDAJG-QFIPXVFZSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
2O7	Binding MOAD:  2O7N	IC50: 15 (nM) from 1 assay(s)
	PDBBind:  2O7N	IC50: 15 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.75 Å
• R-Value Free: 0.234 
• R-Value Work: 0.215 
• R-Value Observed: 0.215 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 67.6	α = 90
b = 88.4	β = 90
c = 71.1	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	refinement
PDB_EXTRACT	data extraction
AMoRE	phasing
CNX	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-03-20 
Deposition Author(s): Sheriff, S.

Revision History  

• Version 1.0: 2007-03-20
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-10-18
  Changes: Advisory, Refinement description
• Version 1.4: 2023-08-30
  Changes: Advisory, Data collection, Database references, Derived calculations, Refinement description