4OH4

Crystal structure of BRI1 in complex with BKI1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural insights into the negative regulation of BRI1 signaling by BRI1-interacting protein BKI1.

Wang, J.Jiang, J.Wang, J.Chen, L.Fan, S.L.Wu, J.W.Wang, X.Wang, Z.X.

(2014) Cell Res. 24: 1328-1341

  • DOI: 10.1038/cr.2014.132

  • PubMed Abstract: 
  • Brassinosteroids (BRs) are essential steroid hormones that have crucial roles in plant growth and development. BRs are perceived by the cell-surface receptor-like kinase brassinosteroid insensitive 1 (BRI1). In the absence of BRs, the cytosolic kinas ...

    Brassinosteroids (BRs) are essential steroid hormones that have crucial roles in plant growth and development. BRs are perceived by the cell-surface receptor-like kinase brassinosteroid insensitive 1 (BRI1). In the absence of BRs, the cytosolic kinase domain (KD) of BRI1 is inhibited by its auto-inhibitory carboxyl terminus, as well as by interacting with an inhibitor protein, BRI1 kinase inhibitor 1 (BKI1). How BR binding to the extracellular domain of BRI1 leads to activation of the KD and dissociation of BKI1 into the cytosol remains unclear. Here we report the crystal structure of BRI1 KD in complex with the interacting peptide derived from BKI1. We also provide biochemical evidence that BRI1-associated kinase 1 (BAK1) plays an essential role in initiating BR signaling. Steroid-dependent heterodimerization of BRI1 and BAK1 ectodomains brings their cytoplasmic KDs in the right orientation for competing with BKI1 and transphosphorylation.


    Organizational Affiliation

    MOE Key Laboratory for Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China.,1] State Key Laboratory of Genetic Engineering and Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, China [2] College of Life Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China.,State Key Laboratory of Genetic Engineering and Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein BRASSINOSTEROID INSENSITIVE 1
A, B
333Arabidopsis thalianaMutation(s): 0 
Gene Names: BRI1
EC: 2.7.10.1, 2.7.11.1
Find proteins for O22476 (Arabidopsis thaliana)
Go to UniProtKB:  O22476
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
BRI1 kinase inhibitor 1
F, E
21Arabidopsis thalianaMutation(s): 0 
Gene Names: BKI1
Find proteins for Q9FMZ0 (Arabidopsis thaliana)
Go to UniProtKB:  Q9FMZ0
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ANP
Query on ANP

Download SDF File 
Download CCD File 
A, B
PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
A, B
L-PEPTIDE LINKINGC3 H8 N O6 PSER
TPO
Query on TPO
A, B
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.202 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 62.915α = 90.00
b = 80.139β = 108.86
c = 79.623γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data scaling
HKL-2000data reduction
PHASERphasing
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-10-29
    Type: Initial release
  • Version 1.1: 2014-11-19
    Type: Database references