4FXL

Crystal structure of the D76N Beta-2 Microglobulin mutant


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.186 
  • R-Value Work: 0.130 
  • R-Value Observed: 0.133 

wwPDB Validation   3D Report Full Report



Literature

Hereditary systemic amyloidosis due to Asp76Asn variant beta-2-microglobulin.

Valleix, S.Gillmore, J.D.Bridoux, F.Mangione, P.P.Dogan, A.Nedelec, B.Boimard, M.Touchard, G.Goujon, J.M.Lacombe, C.Lozeron, P.Adams, D.Lacroix, C.Maisonobe, T.Plante-Bordeneuve, V.Vrana, J.A.Theis, J.D.Giorgetti, S.Porcari, R.Ricagno, S.Bolognesi, M.Stoppini, M.Delpech, M.Pepys, M.B.Hawkins, P.N.Bellotti, V.

(2012) N Engl J Med 366: 2276-2283

  • DOI: 10.1056/NEJMoa1201356
  • Primary Citation of Related Structures:  
    4FXL

  • PubMed Abstract: 
  • We describe a kindred with slowly progressive gastrointestinal symptoms and autonomic neuropathy caused by autosomal dominant, hereditary systemic amyloidosis. The amyloid consists of Asp76Asn variant β(2)-microglobulin. Unlike patients with dialysis ...

    We describe a kindred with slowly progressive gastrointestinal symptoms and autonomic neuropathy caused by autosomal dominant, hereditary systemic amyloidosis. The amyloid consists of Asp76Asn variant β(2)-microglobulin. Unlike patients with dialysis-related amyloidosis caused by sustained high plasma concentrations of wild-type β(2)-microglobulin, the affected members of this kindred had normal renal function and normal circulating β(2)-microglobulin values. The Asp76Asn β(2)-microglobulin variant was thermodynamically unstable and remarkably fibrillogenic in vitro under physiological conditions. Previous studies of β(2)-microglobulin aggregation have not shown such amyloidogenicity for single-residue substitutions. Comprehensive biophysical characterization of the β(2)-microglobulin variant, including its 1.40-Å, three-dimensional structure, should allow further elucidation of fibrillogenesis and protein misfolding.


    Organizational Affiliation

    Laboratoire de Biochimie et de Génétique Moléculaire, Université Paris-Descartes, Sorbonne Paris Cité, Faculté de Médecine Paris, Assistance Public–Hôpitaux de Paris (AP-HP), Paris, France. sophie.valleix@cch.aphp.fr



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulinA100Homo sapiensMutation(s): 1 
Gene Names: B2MCDABP0092HDCMA22P
Find proteins for P61769 (Homo sapiens)
Explore P61769 
Go to UniProtKB:  P61769
NIH Common Fund Data Resources
PHAROS  P61769
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PEG
Query on PEG

Download CCD File 
A
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download CCD File 
A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
NA
Query on NA

Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.40 Å
  • R-Value Free: 0.186 
  • R-Value Work: 0.130 
  • R-Value Observed: 0.133 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.22α = 90
b = 28.42β = 126.54
c = 52.26γ = 90
Software Package:
Software NamePurpose
MxCuBEdata collection
PHASERphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-08-15
    Type: Initial release