9H24 | pdb_00009h24

Crystal structure of MtCERK1 extracellular domain

• PDB DOI: https://doi.org/10.2210/pdb9H24/pdb

• Classification: PLANT PROTEIN
• Organism(s): Medicago truncatula
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2024-10-10 Released: 2025-07-16 
• Deposition Author(s): Hansen, S.B., Gysel, K., Andersen, K.R.
• Funding Organization(s): The Carlsberg Foundation, Danish Council for Independent Research, Novo Nordisk Foundation

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.98 Å
• R-Value Free: 
  0.284 (Depositor), 0.289 (DCC) 
• R-Value Work: 
  0.231 (Depositor), 0.231 (DCC) 
• R-Value Observed: 
  0.233 (Depositor) 

Starting Model: experimental

Literature

Structural basis for size-selective perception of chitin in plants

Gysel, K., Hansen, S.B., Ruebsam, H., Alsarraf, H.M.A.B., Madland, E., Cheng, J.X.J., Baadegaard, C., Poulsen, E.C., Vinther, M., Fort, S., Stougaard, J., Andersen, K.R.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly Evidence: gel filtration

Macromolecule Content 

• Total Structure Weight: 23.91 kDa 
• Atom Count: 1,574 
• Modeled Residue Count: 195 
• Deposited Residue Count: 210 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
LysM receptor kinase K1B	A	210	Medicago truncatula	Mutation(s): 0  Gene Names: 11442199, MTR_3g080050, MtrunA17_Chr3g0119241 EC: 2.7.11.1
UniProt
Find proteins for G7J6P5 (Medicago truncatula) Explore G7J6P5  Go to UniProtKB:  G7J6P5
Glycosylation
Glycosylation Sites: 3

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	B [auth A], C [auth A], D [auth A], E [auth A]	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.98 Å
• R-Value Free:  0.284 (Depositor), 0.289 (DCC) 
• R-Value Work:  0.231 (Depositor), 0.231 (DCC) 
• R-Value Observed: 0.233 (Depositor) 

Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 70.669	α = 90
b = 70.669	β = 90
c = 95.205	γ = 90

Software Package:

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

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-07-16 
Deposition Author(s): Hansen, S.B., Gysel, K., Andersen, K.R.

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Funding Organization	Location	Grant Number
The Carlsberg Foundation	Denmark	CF21-0139
Danish Council for Independent Research	Denmark	3103-00137B
Novo Nordisk Foundation	Denmark	NNF21OC0071300

Revision History  

• Version 1.0: 2025-07-16
  Type: Initial release