4UNU

MCG - a dimer of lambda variable domains


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.95 Å
  • R-Value Free: 0.130 
  • R-Value Work: 0.107 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Formation of Amyloid Fibers by Monomeric Light-Chain Variable Domains.

Brumshtein, B.Esswein, S.R.Landau, M.Ryan, C.M.Whitelegge, J.P.Phillips, M.L.Cascio, D.Sawaya, M.R.Eisenberg, D.S.

(2014) J.Biol.Chem. 289: 27513

  • DOI: 10.1074/jbc.M114.585638
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Systemic light chain amyloidosis is a lethal disease characterized by excess immunoglobulin light chains and light chain fragments composed of variable domains, which aggregate into amyloid fibers. These fibers accumulate and damage organs. Some ligh ...

    Systemic light chain amyloidosis is a lethal disease characterized by excess immunoglobulin light chains and light chain fragments composed of variable domains, which aggregate into amyloid fibers. These fibers accumulate and damage organs. Some light chains induce formation of amyloid fibers, whereas others do not, making it unclear what distinguishes amyloid formers from non-formers. One mechanism by which sequence variation may reduce propensity to form amyloid fibers is by shifting the equilibrium toward an amyloid-resistant quaternary structure. Here we identify the monomeric form of the Mcg immunoglobulin light chain variable domain as the quaternary unit required for amyloid fiber assembly. Dimers of Mcg variable domains remain stable and soluble, yet become prone to assemble into amyloid fibers upon disassociation into monomers.


    Organizational Affiliation

    From the Departments of Biological Chemistry and Chemistry and Biochemistry, Howard Hughes Medical Institute, UCLA-Department of Energy (DOE) Institute for Genomics and Proteomics, UCLA, Los Angeles, California 90095 and.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
IG LAMBDA CHAIN V-II REGION MGC
A, B
111Homo sapiensMutation(s): 0 
Gene Names: IGLV2-8
Find proteins for P01709 (Homo sapiens)
Go to UniProtKB:  P01709
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
15P
Query on 15P

Download SDF File 
Download CCD File 
A
POLYETHYLENE GLYCOL (N=34)
PEG 1500
C69 H140 O35
VUYXVWGKCKTUMF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.95 Å
  • R-Value Free: 0.130 
  • R-Value Work: 0.107 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 41.340α = 90.00
b = 34.120β = 104.94
c = 63.180γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
REFMACrefinement
XDSdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-08-27
    Type: Initial release
  • Version 1.1: 2014-09-03
    Type: Database references
  • Version 1.2: 2014-10-15
    Type: Database references
  • Version 1.3: 2017-09-13
    Type: Data collection