Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

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

Macromolecule Content

• Total Structure Weight: 25627.10 
• Atom Count: 1683 
• Residue Count: 212 
• Unique protein chains: 1

4EBY

Crystal structure of the ectodomain of a receptor like kinase

• DOI: 10.2210/pdb4EBY/pdb

• Classification: TRANSFERASE
• Organism(s): Arabidopsis thaliana
• Expression System: Spodoptera frugiperda


• Deposited: 2012-03-25 Released: 2012-06-27 
• Deposition Author(s): Chai, J., Liu, T., Han, Z., She, J, Wang, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free: 0.189 
• R-Value Work: 0.171 

Literature

Chitin-induced dimerization activates a plant immune receptor.

Liu, T., Liu, Z., Song, C., Hu, Y., Han, Z., She, J., Fan, F., Wang, J., Jin, C., Chang, J., Zhou, J.M., Chai, J.

(2012) Science 336: 1160-1164

• PubMed: 22654057 
• DOI: 10.1126/science.1218867
• Primary Citation of Related Structures:  
  4EBZ


• PubMed Abstract: 
  

Pattern recognition receptors confer plant resistance to pathogen infection by recognizing the conserved pathogen-associated molecular patterns. The cell surface receptor chitin elicitor receptor kinase 1 of Arabidopsis (AtCERK1) directly binds chitin through its lysine motif (LysM)-containing ectodomain (AtCERK1-ECD) to activate immune responses. The crystal structure that we solved of an AtCERK1-ECD complexed with a chitin pentamer reveals that their interaction is primarily mediated by a LysM and three chitin residues. By acting as a bivalent ligand, a chitin octamer induces AtCERK1-ECD dimerization that is inhibited by shorter chitin oligomers. A mutation attenuating chitin-induced AtCERK1-ECD dimerization or formation of nonproductive AtCERK1 dimer by overexpression of AtCERK1-ECD compromises AtCERK1-mediated signaling in plant cells. Together, our data support the notion that chitin-induced AtCERK1 dimerization is critical for its activation.

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Organizational Affiliation: 

Graduate Program in Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Chitin elicitor receptor kinase 1	A	212	Arabidopsis thaliana	Mutation(s): 0  Gene Names: CERK1 (LYK1, RLK1) EC: 2.7.11.1
Find proteins for A8R7E6 (Arabidopsis thaliana) Go to UniProtKB:  A8R7E6

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
BMA	A	BETA-D-MANNOSE C6 H12 O6 WQZGKKKJIJFFOK-RWOPYEJCSA-N
NAG	A	N-ACETYL-D-GLUCOSAMINE C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free: 0.189 
• R-Value Work: 0.171 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 56.829	α = 90.00
b = 71.128	β = 90.00
c = 72.761	γ = 90.00

Software Package:

Software Name	Purpose
PHENIX	refinement
HKL-2000	data collection
HKL-2000	data scaling
SHELXS	phasing
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-03-25 
• Released Date: 2012-06-27 
• Deposition Author(s): Chai, J., Liu, T., Han, Z., She, J, Wang, J.

Revision History 

• Version 1.0: 2012-06-27
  Type: Initial release