5IXO

Crystal structure of the Arabidopsis receptor kinase HAESA LRR ectdomain (apo form).


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.74 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Mechanistic insight into a peptide hormone signaling complex mediating floral organ abscission.

Santiago, J.Brandt, B.Wildhagen, M.Hohmann, U.Hothorn, L.A.Butenko, M.A.Hothorn, M.

(2016) Elife 5: --

  • DOI: 10.7554/eLife.15075
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Plants constantly renew during their life cycle and thus require to shed senescent and damaged organs. Floral abscission is controlled by the leucine-rich repeat receptor kinase (LRR-RK) HAESA and the peptide hormone IDA. It is unknown how expression ...

    Plants constantly renew during their life cycle and thus require to shed senescent and damaged organs. Floral abscission is controlled by the leucine-rich repeat receptor kinase (LRR-RK) HAESA and the peptide hormone IDA. It is unknown how expression of IDA in the abscission zone leads to HAESA activation. Here we show that IDA is sensed directly by the HAESA ectodomain. Crystal structures of HAESA in complex with IDA reveal a hormone binding pocket that accommodates an active dodecamer peptide. A central hydroxyproline residue anchors IDA to the receptor. The HAESA co-receptor SERK1, a positive regulator of the floral abscission pathway, allows for high-affinity sensing of the peptide hormone by binding to an Arg-His-Asn motif in IDA. This sequence pattern is conserved among diverse plant peptides, suggesting that plant peptide hormone receptors may share a common ligand binding mode and activation mechanism.


    Organizational Affiliation

    Structural Plant Biology Laboratory, Department of Botany and Plant Biology, University of Geneva, Geneva, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Receptor-like protein kinase 5
A
616Arabidopsis thalianaMutation(s): 0 
Gene Names: RLK5 (HAE)
EC: 2.7.10.1, 2.7.11.1
Find proteins for P47735 (Arabidopsis thaliana)
Go to UniProtKB:  P47735
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.74 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.180 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 148.678α = 90.00
b = 148.678β = 90.00
c = 58.041γ = 120.00
Software Package:
Software NamePurpose
SHARPphasing
REFMACrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-04-20
    Type: Initial release