1A8J

IMMUNOGLOBULIN LAMBDA LIGHT CHAIN DIMER (MCG) COMPLEX WITH ASPARTAME

• PDB DOI: https://doi.org/10.2210/pdb1A8J/pdb

• Classification: IMMUNOGLOBULIN
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 1998-03-26 Released: 1998-06-17 
• Deposition Author(s): Edmundson, A.B., Manion, C.V.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.380 
• R-Value Work: 0.220 
• R-Value Observed: 0.220 

Literature

Treatment of osteoarthritis with aspartame.

Edmundson, A.B., Manion, C.V.

(1998) Clin Pharmacol Ther 63: 580-593

• PubMed: 9630831 
• DOI: https://doi.org/10.1016/S0009-9236(98)90109-6
• Primary Citation of Related Structures:  
  1A8J


• PubMed Abstract: 
  

  The binding of sweet-tasting compounds in a human (Mcg) Bence-Jones dimer has been characterized by x-ray crystallography. Aspartame binding in this immunoglobulin fragment is remarkable. Unexpected pain relief noted by A.B.E., a crystallographer with diagnosed osteoarthritis, suggested that the accommodation of aspartame in the active site of the dimer may represent surrogate binding by other proteins, with analgesia as the outcome.

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Organizational Affiliation: 

Oklahoma Medical Research Foundation, Oklahoma City 73104, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 46.25 kDa 
• Atom Count: 3,254 
• Modelled Residue Count: 432 
• Deposited Residue Count: 432 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
IMMUNOGLOBULIN LAMBDA LIGHT CHAIN DIMER (MCG)	A [auth L], B [auth H]	216	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P01709 (Homo sapiens) Explore P01709  Go to UniProtKB:  P01709
GTEx:  ENSG00000278196

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PME	C [auth L], D [auth H]	N-L-ALPHA-ASPARTYL L-PHENYLALANINE 1-METHYL ESTER C14 H18 N2 O5 IAOZJIPTCAWIRG-QWRGUYRKSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PCA	A [auth L], B [auth H]	L-PEPTIDE LINKING	C5 H7 N O3		GLN

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.380 
• R-Value Work: 0.220 
• R-Value Observed: 0.220 
• Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 72.3	α = 90
b = 72.3	β = 90
c = 185.9	γ = 120

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-06-17 
Deposition Author(s): Edmundson, A.B., Manion, C.V.

Revision History  

• Version 1.0: 1998-06-17
  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: 2018-04-04
  Changes: Data collection, Other
• Version 2.0: 2019-12-25
  Changes: Database references, Derived calculations, Polymer sequence