4Q5J

Crystal structure of SeMet derivative BRI1 in complex with BKI1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.77 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.203 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 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: https://doi.org/10.1038/cr.2014.132
  • Primary Citation of Related Structures:  
    4OH4, 4Q5J

  • 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 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.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein BRASSINOSTEROID INSENSITIVE 1
A, B
341Arabidopsis thalianaMutation(s): 0 
Gene Names: At4g39400BRI1F23K16.30
EC: 2.7.10.1 (PDB Primary Data), 2.7.11.1 (PDB Primary Data)
UniProt
Find proteins for O22476 (Arabidopsis thaliana)
Explore O22476 
Go to UniProtKB:  O22476
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO22476
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
BRI1 kinase inhibitor 1C [auth F],
D [auth E]
21Arabidopsis thalianaMutation(s): 0 
UniProt
Find proteins for Q9FMZ0 (Arabidopsis thaliana)
Explore Q9FMZ0 
Go to UniProtKB:  Q9FMZ0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9FMZ0
Sequence Annotations
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  • Reference Sequence
Small Molecules
Modified Residues  3 Unique
IDChains TypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
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: 2.77 Å
  • R-Value Free: 0.259 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.203 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.715α = 90
b = 80.288β = 109.55
c = 80.557γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
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: 2014-10-29
    Type: Initial release
  • Version 1.1: 2019-12-25
    Changes: Database references, Derived calculations
  • Version 1.2: 2023-11-08
    Changes: Data collection, Database references, Derived calculations, Refinement description
  • Version 1.3: 2023-12-06
    Changes: Data collection