4S10

Gelsolin nanobody shielding mutant plasma gelsolin from furin proteolysis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.614 Å
  • R-Value Free: 0.313 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

An ER-directed gelsolin nanobody targets the first step in amyloid formation in a gelsolin amyloidosis mouse model.

Van Overbeke, W.Wongsantichon, J.Everaert, I.Verhelle, A.Zwaenepoel, O.Loonchanta, A.Burtnick, L.D.De Ganck, A.Hochepied, T.Haigh, J.Cuvelier, C.Derave, W.Robinson, R.C.Gettemans, J.

(2015) Hum.Mol.Genet. 24: 2492-2507

  • DOI: 10.1093/hmg/ddv010
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Hereditary gelsolin amyloidosis is an autosomal dominantly inherited amyloid disorder. A point mutation in the GSN gene (G654A being the most common one) results in disturbed calcium binding by the second gelsolin domain (G2). As a result, the foldin ...

    Hereditary gelsolin amyloidosis is an autosomal dominantly inherited amyloid disorder. A point mutation in the GSN gene (G654A being the most common one) results in disturbed calcium binding by the second gelsolin domain (G2). As a result, the folding of G2 is hampered, rendering the mutant plasma gelsolin susceptible to a proteolytic cascade. Consecutive cleavage by furin and MT1-MMP-like proteases generates 8 and 5 kDa amyloidogenic peptides that cause neurological, ophthalmological and dermatological findings. To this day, no specific treatment is available to counter the pathogenesis. Using GSN nanobody 11 as a molecular chaperone, we aimed to protect mutant plasma gelsolin from furin proteolysis in the trans-Golgi network. We report a transgenic, GSN nanobody 11 secreting mouse that was used for crossbreeding with gelsolin amyloidosis mice. Insertion of the therapeutic nanobody gene into the gelsolin amyloidosis mouse genome resulted in improved muscle contractility. X-ray crystal structure determination of the gelsolin G2:Nb11 complex revealed that Nb11 does not directly block the furin cleavage site. We conclude that nanobodies can be used to shield substrates from aberrant proteolysis and this approach might establish a novel therapeutic strategy in amyloid diseases.


    Organizational Affiliation

    Department of Chemistry and Centre for Blood Research, Life Sciences Institute, University of British Columbia, Vancouver, British Columbia, Canada.,Department for Molecular Biomedical Research, VIB, Ghent, Belgium, Department of Biomedical Molecular Biology and.,Department of Biochemistry, Faculty of Medicine and Health Sciences.,Department of Movement and Sport Sciences, Faculty of Medicine and Health Sciences.,Institute of Molecular and Cellular Biology, A*STAR, Biopolis, Singapore 138673, Singapore, Department of Biochemistry, National University of Singapore, 8 Medical Drive, Singapore 117597, Singapore, jan.gettemans@ugent.be rrobinson@imcb.a-star.edu.sg.,Department of Biomedical Molecular Biology and Vascular Cell Biology Unit, VIB Inflammation Research Centre, Ghent, Belgium and Mammalian Functional Genetics Laboratory, Division of Blood Cancers, Australian Centre for Blood Diseases, Department of Clinical Haematology, Monash University and Alfred Health Centre, Melbourne, Australia.,Department of Pathology, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium.,Department of Biochemistry, Faculty of Medicine and Health Sciences, jan.gettemans@ugent.be rrobinson@imcb.a-star.edu.sg.,Institute of Molecular and Cellular Biology, A*STAR, Biopolis, Singapore 138673, Singapore.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GELSOLIN NANOBODY
A, B
127N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Gelsolin
C, D
103Homo sapiensMutation(s): 2 
Gene Names: GSN
Find proteins for P06396 (Homo sapiens)
Go to Gene View: GSN
Go to UniProtKB:  P06396
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
C, D
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.614 Å
  • R-Value Free: 0.313 
  • R-Value Work: 0.223 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 37.598α = 103.00
b = 46.334β = 92.03
c = 76.438γ = 89.85
Software Package:
Software NamePurpose
Blu-Icedata collection
PHENIXrefinement
PHASERphasing
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-06-03
    Type: Initial release