2Y1Z

Human alphaB Crystallin ACD R120G


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.180 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal Structure of R120G Disease Mutant of Human Alphab-Crystallin Domain Dimer Shows Closure of a Groove

Clark, A.R.Naylor, C.E.Bagneris, C.Keep, N.H.Slingsby, C.

(2011) J Mol Biol 408: 118

  • DOI: 10.1016/j.jmb.2011.02.020
  • Primary Citation of Related Structures:  
    2Y1Z, 2Y1Y, 2Y22

  • PubMed Abstract: 
  • Small heat shock proteins form large cytosolic assemblies from an "α-crystallin domain" (ACD) flanked by sequence extensions. Mutation of a conserved arginine in the ACD of several human small heat shock protein family members causes many common inherited diseases of the lens and neuromuscular system ...

    Small heat shock proteins form large cytosolic assemblies from an "α-crystallin domain" (ACD) flanked by sequence extensions. Mutation of a conserved arginine in the ACD of several human small heat shock protein family members causes many common inherited diseases of the lens and neuromuscular system. The mutation R120G in αB-crystallin causes myopathy, cardiomyopathy and cataract. We have solved the X-ray structure of the excised ACD dimer of human αB R120G close to physiological pH and compared it with several recently determined wild-type vertebrate ACD dimer structures. Wild-type excised ACD dimers have a deep groove at the interface floored by a flat extended "bottom sheet." Solid-state NMR studies of large assemblies of full-length αB-crystallin have shown that the groove is blocked in the ACD dimer by curvature of the bottom sheet. The crystal structure of R120G ACD dimer also reveals a closed groove, but here the bottom sheet is flat. Loss of Arg120 results in rearrangement of an extensive array of charged interactions across this interface. His83 and Asp80 on movable arches on either side of the interface close the groove by forming two new salt bridges. The residues involved in this extended set of ionic interactions are conserved in Hsp27, Hsp20, αA- and αB-crystallin sequences. They are not conserved in Hsp22, where mutation of the equivalent of Arg120 causes neuropathy. We speculate that the αB R120G mutation disturbs oligomer dynamics, causing the growth of large soluble oligomers that are toxic to cells by blocking essential processes.


    Related Citations: 
    • Crystal Structures of Alpha-Crystallin Domain Dimers of Alphab-Crystallin and Hsp20.
      Bagneris, C., Bateman, O.A., Naylor, C.E., Cronin, N., Boelens, W.C., Keep, N.H., Slingsby, C.
      (2009) J Mol Biol 392: 1242

    Organizational Affiliation

    Department of Biological Sciences, Crystallography, Institute of Structural and Molecular Biology, Birkbeck College, Malet Street, London WC1E 7HX, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ALPHA-CRYSTALLIN B CHAINA, B94Homo sapiensMutation(s): 2 
Gene Names: CRYABCRYA2HSPB5
Find proteins for P02511 (Homo sapiens)
Explore P02511 
Go to UniProtKB:  P02511
NIH Common Fund Data Resources
PHAROS:  P02511
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MRD
Query on MRD

Download Ideal Coordinates CCD File 
C [auth A], E [auth B], F [auth B](4R)-2-METHYLPENTANE-2,4-DIOL
C6 H14 O2
SVTBMSDMJJWYQN-RXMQYKEDSA-N
 Ligand Interaction
MPD
Query on MPD

Download Ideal Coordinates CCD File 
D [auth A](4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.180 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.73α = 90
b = 60.73β = 90
c = 100.15γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-03-02
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance