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 

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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
  • 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) ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein BRASSINOSTEROID INSENSITIVE 1A, B341Arabidopsis thalianaMutation(s): 0 
Gene Names: At4g39400, BRI1, F23K16.30
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
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
BRI1 kinase inhibitor 1D [auth E],
C [auth F]		21Arabidopsis thalianaMutation(s): 0 
Gene Names: BKI1, At5g42750, MJB21.13
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
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ANP
Query on ANP
Download Ideal Coordinates CCD File 
E [auth A],
F [auth B]		PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
C10 H17 N6 O12 P3
PVKSNHVPLWYQGJ-KQYNXXCUSA-N		 Ligand Interaction
Modified Residues  3 Unique
IDChainsTypeFormula2D 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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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