4MNA

Crystal structure of the free FLS2 ectodomains


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.00 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.251 

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Ligand Structure Quality Assessment 


This is version 1.2 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: 10.1126/science.1243825
  • Primary Citation of Related Structures:  
    4MNA, 4MN8

  • 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 ...

    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)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
LRR receptor-like serine/threonine-protein kinase FLS2A662Arabidopsis 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
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.00 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.249 
  • R-Value Observed: 0.251 
  • 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

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Ligand Structure Quality Assessment  



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