4MNA | pdb_00004mna

Crystal structure of the free FLS2 ectodomains


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.00 Å
  • R-Value Free: 
    0.279 (Depositor), 0.280 (DCC) 
  • R-Value Work: 
    0.249 (Depositor), 0.250 (DCC) 
  • R-Value Observed: 
    0.251 (Depositor) 

Starting Model: experimental
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Ligand Structure Quality Assessment 

Created with Raphaël 2.3.0Worse 01 BetterLigand structure goodness of fit to experimental dataBest fitted NAGClick on this verticalbar to view details

This is version 1.4 of the entry. See complete history


Literature

Structural basis for flg22-induced activation of the Arabidopsis FLS2-BAK1 immune complex.

Sun, Y.Li, L.Macho, A.P.Han, Z.Hu, Z.Zipfel, C.Zhou, J.M.Chai, J.

(2013) Science 342: 624-628

  • DOI: https://doi.org/10.1126/science.1243825
  • Primary Citation of Related Structures:  
    4MN8, 4MNA

  • PubMed Abstract: 

    Flagellin perception in Arabidopsis is through recognition of its highly conserved N-terminal epitope (flg22) by flagellin-sensitive 2 (FLS2). Flg22 binding induces FLS2 heteromerization with BRASSINOSTEROID INSENSITIVE 1-associated kinase 1 (BAK1) and their reciprocal activation followed by plant immunity. Here, we report the crystal structure of FLS2 and BAK1 ectodomains complexed with flg22 at 3.06 angstroms. A conserved and a nonconserved site from the inner surface of the FLS2 solenoid recognize the C- and N-terminal segment of flg22, respectively, without oligomerization or conformational changes in the FLS2 ectodomain. Besides directly interacting with FLS2, BAK1 acts as a co-receptor by recognizing the C terminus of the FLS2-bound flg22. Our data reveal the molecular mechanisms underlying FLS2-BAK1 complex recognition of flg22 and provide insight into the immune receptor complex activation.


  • Organizational Affiliation

    School of Life Sciences, Tsinghua University, Beijing 100084, China, and Tsinghua-Peking Center for Life Sciences, Beijing 100084, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
LRR receptor-like serine/threonine-protein kinase FLS2662Arabidopsis thalianaMutation(s): 0 
Gene Names: FLS2At5g46330MPL12.13MPL12.8
EC: 2.7.11.1
UniProt
Find proteins for Q9FL28 (Arabidopsis thaliana)
Explore Q9FL28 
Go to UniProtKB:  Q9FL28
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9FL28
Glycosylation
Glycosylation Sites: 5
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NAG
Query on NAG

Download Ideal Coordinates CCD File 
B [auth A],
C [auth A],
D [auth A],
F [auth A],
H [auth A]
2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
ZN
Query on ZN

Download Ideal Coordinates CCD File 
E [auth A],
G [auth A],
I [auth A],
J [auth A]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.00 Å
  • R-Value Free:  0.279 (Depositor), 0.280 (DCC) 
  • R-Value Work:  0.249 (Depositor), 0.250 (DCC) 
  • R-Value Observed: 0.251 (Depositor) 
Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 189.542α = 90
b = 189.542β = 90
c = 117.751γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
PHASESphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 

Created with Raphaël 2.3.0Worse 01 BetterLigand structure goodness of fit to experimental dataBest fitted NAGClick on this verticalbar to view details

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-12-04
    Type: Initial release
  • Version 1.1: 2017-08-23
    Changes: Refinement description, Source and taxonomy
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary
  • Version 1.3: 2023-11-08
    Changes: Data collection, Database references, Refinement description, Structure summary
  • Version 1.4: 2024-10-30
    Changes: Structure summary