5CFH

human beta-2 microglobulin double mutant W60G-Y63W


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.172 

wwPDB Validation   3D Report Full Report



Literature

Rational design of mutations that change the aggregation rate of a protein while maintaining its native structure and stability.

Camilloni, C.Sala, B.M.Sormanni, P.Porcari, R.Corazza, A.De Rosa, M.Zanini, S.Barbiroli, A.Esposito, G.Bolognesi, M.Bellotti, V.Vendruscolo, M.Ricagno, S.

(2016) Sci Rep 6: 25559-25559

  • DOI: 10.1038/srep25559
  • Primary Citation of Related Structures:  
    5CFH, 5CKG, 5CKA

  • PubMed Abstract: 
  • A wide range of human diseases is associated with mutations that, destabilizing proteins native state, promote their aggregation. However, the mechanisms leading from folded to aggregated states are still incompletely understood. To investigate these mec ...

    A wide range of human diseases is associated with mutations that, destabilizing proteins native state, promote their aggregation. However, the mechanisms leading from folded to aggregated states are still incompletely understood. To investigate these mechanisms, we used a combination of NMR spectroscopy and molecular dynamics simulations to compare the native state dynamics of Beta-2 microglobulin (β2m), whose aggregation is associated with dialysis-related amyloidosis, and its aggregation-resistant mutant W60G. Our results indicate that W60G low aggregation propensity can be explained, beyond its higher stability, by an increased average protection of the aggregation-prone residues at its surface. To validate these findings, we designed β2m variants that alter the aggregation-prone exposed surface of wild-type and W60G β2m modifying their aggregation propensity. These results allowed us to pinpoint the role of dynamics in β2m aggregation and to provide a new strategy to tune protein aggregation by modulating the exposure of aggregation-prone residues.


    Organizational Affiliation

    Dipartimento di Bioscienze, Università degli Studi di Milano, 20133 Milano, Italy.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-2-microglobulin A100Homo sapiensMutation(s): 2 
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
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.49 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.172 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.346α = 90
b = 29.09β = 113.01
c = 44.41γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Italian Ministry of University and ResearchItalyProject FIRB RBFR109EOS

Revision History 

  • Version 1.0: 2016-05-18
    Type: Initial release