6GLX

Structure of galectin-10 in complex with the Fab fragment of a Charcot-Leyden crystal solubilizing antibody, 4E8

• PDB DOI:  https://doi.org/10.2210/pdb6GLX/pdb

• Classification: SUGAR BINDING PROTEIN
• Organism(s): Homo sapiens, Lama glama
• Expression System: Escherichia coli BL21(DE3), Homo sapiens
• Mutation(s): No 


• Deposited: 2018-05-23 Released: 2019-06-05 
• Deposition Author(s): Verstraete, K., Verschueren, K., Savvides, S.N.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.40 Å
• R-Value Free: 0.360 
• R-Value Work: 0.303 
• R-Value Observed: 0.307 

Literature

Protein crystallization promotes type 2 immunity and is reversible by antibody treatment.

Persson, E.K., Verstraete, K., Heyndrickx, I., Gevaert, E., Aegerter, H., Percier, J.M., Deswarte, K., Verschueren, K.H.G., Dansercoer, A., Gras, D., Chanez, P., Bachert, C., Goncalves, A., Van Gorp, H., De Haard, H., Blanchetot, C., Saunders, M., Hammad, H., Savvides, S.N., Lambrecht, B.N.

(2019) Science 364

• PubMed: 31123109 
• DOI: https://doi.org/10.1126/science.aaw4295
• Primary Citation of Related Structures:  
  6GKQ, 6GKS, 6GKT, 6GKU, 6GLW, 6GLX, 6QRN


• PubMed Abstract: 
  

Although spontaneous protein crystallization is a rare event in vivo, Charcot-Leyden crystals (CLCs) consisting of galectin-10 (Gal10) protein are frequently observed in eosinophilic diseases, such as asthma. We found that CLCs derived from patients showed crystal packing and Gal10 structure identical to those of Gal10 crystals grown in vitro. When administered to the airways, crystalline Gal10 stimulated innate and adaptive immunity and acted as a type 2 adjuvant. By contrast, a soluble Gal10 mutein was inert. Antibodies directed against key epitopes of the CLC crystallization interface dissolved preexisting CLCs in patient-derived mucus within hours and reversed crystal-driven inflammation, goblet-cell metaplasia, immunoglobulin E (IgE) synthesis, and bronchial hyperreactivity (BHR) in a humanized mouse model of asthma. Thus, protein crystals may promote hallmark features of asthma and are targetable by crystal-dissolving antibodies.

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Organizational Affiliation: 

Department of Pulmonary Medicine, ErasmusMC, Rotterdam, Netherlands.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 6-mer - A2B2C2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: light scattering

Macromolecule Content

• Total Structure Weight: 136.02 kDa 
• Atom Count: 8,685 
• Modelled Residue Count: 1,139 
• Deposited Residue Count: 1,248 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Galectin-10	A, B	179	Homo sapiens	Mutation(s): 0  Gene Names: CLC, LGALS10, LGALS10A
UniProt & NIH Common Fund Data Resources
Find proteins for Q05315 (Homo sapiens) Explore Q05315  Go to UniProtKB:  Q05315
PHAROS:  Q05315

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Fab 4E8 - Heavy chain	C, E [auth H]	232	Lama glama	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Fab 4E8 - Light chain	D, F [auth L]	213	Lama glama	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.40 Å
• R-Value Free: 0.360 
• R-Value Work: 0.303 
• R-Value Observed: 0.307 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 41.326	α = 90
b = 150.449	β = 96.31
c = 94.504	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XDS	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2019-06-05 
Deposition Author(s): Verstraete, K., Verschueren, K., Savvides, S.N.

Revision History  

• Version 1.0: 2019-06-05
  Type: Initial release