Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 29.51 kDa 
• Atom Count: 2100 
• Modelled Residue Count: 262 
• Deposited Residue Count: 262 
• Unique protein chains: 1

1A2D

PYRIDOXAMINE MODIFIED MURINE ADIPOCYTE LIPID BINDING PROTEIN

• PDB DOI: 10.2210/pdb1A2D/pdb

• Classification: FATTY ACID BINDING PROTEIN
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 1997-12-29 Released: 1998-07-01 
• Deposition Author(s): Ory, J., Mazhary, A., Kuang, H., Davies, R., Distefano, M., Banaszak, L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.273 
• R-Value Work: 0.196 
• R-Value Observed: 0.196 

Literature

Structural characterization of two synthetic catalysts based on adipocyte lipid-binding protein.

Ory, J.J., Mazhary, A., Kuang, H., Davies, R.R., Distefano, M.D., Banaszak, L.J.

(1998) Protein Eng 11: 253-261

• PubMed: 9680187 
• DOI: 10.1093/protein/11.4.253
• Primary Citation of Related Structures:  
  1A18, 1A2D


• PubMed Abstract: 
  

Adipocyte lipid-binding protein (ALBP) is a small (14.5 kDa) 10-stranded beta-barrel protein found in mammalian fat cells. The crystal structures of various holo-forms of ALBP have been solved and show the fatty acid ligand bound in a large (approximately 400 A3) cavity isolated from bulk solvent. Examination of the cavity suggests that it would be a good site for the creation of an artificial catalyst, as numerous well defined crystal structures of ALBP are available and past studies have shown the conformation to be reasonably tolerant to modification and mutagenesis. Previous work has shown ALBP to be a good protein scaffold for exploring enantio- and stereoselective reactions; two constructs, ALBP attached to either a pyridoxamine or a phenanthroline group at C117, have been chemically characterized. Both modified proteins have been crystallized and their structures solved and refined. The X-ray models have been used to examine the origin of the chiral selectivity seen in the products. It is apparent that these covalent adducts reduce the internal cavity volume, sterically limiting substrate interactions with the reactive groups, as well as solvent access to potential intermediates in the reaction pathway.

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Organizational Affiliation: 

Department of Biochemistry, University of Minnesota, Minneapolis 55455, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ADIPOCYTE LIPID BINDING PROTEIN	A, B	131	Mus musculus	Mutation(s): 1  Gene Names: Fabp4, Ap2
UniProt
Find proteins for P04117 (Mus musculus) Explore P04117  Go to UniProtKB:  P04117

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CL	C [auth A], D [auth B]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PYX	A, B	L-PEPTIDE LINKING	C11 H17 N3 O3 S2		CYS

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.273 
• R-Value Work: 0.196 
• R-Value Observed: 0.196 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 80.08	α = 90
b = 96.25	β = 90
c = 49.8	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-12-29 
• Released Date: 1998-07-01 
Deposition Author(s): Ory, J., Mazhary, A., Kuang, H., Davies, R., Distefano, M., Banaszak, L.

Revision History  

• Version 1.0: 1998-07-01
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance