5CI6

Crystal structure of Arabidopsis thaliana MPK6


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


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Literature

Analysis of crystal structure of Arabidopsis MPK6 and generation of its mutants with higher activity

Wang, B.Qin, X.Wu, J.Deng, H.Li, Y.Yang, H.Chen, Z.Liu, G.Ren, D.

(2016) Sci Rep 6: 25646-25646

  • DOI: 10.1038/srep25646

  • PubMed Abstract: 
  • Mitogen-activated protein kinase (MAPK) cascades, which are the highly conserved signalling modules in eukaryotic organisms, have been shown to play important roles in regulating growth, development, and stress responses. The structures of various MA ...

    Mitogen-activated protein kinase (MAPK) cascades, which are the highly conserved signalling modules in eukaryotic organisms, have been shown to play important roles in regulating growth, development, and stress responses. The structures of various MAPKs from yeast and animal have been solved, and structure-based mutants were generated for their function analyses, however, the structures of plant MAPKs remain unsolved. Here, we report the crystal structure of Arabidopsis MPK6 at a 3.0 Å resolution. Although MPK6 is topologically similar to ERK2 and p38, the structures of the glycine-rich loop, MAPK insert, substrate binding sites, and L16 loop in MPK6 show notable differences from those of ERK2 and p38. Based on the structural comparison, we constructed MPK6 mutants and analyzed their kinase activity both in vitro and in planta. MPK6(F364L) and MPK6(F368L) mutants, in which Phe364 and Phe368 in the L16 loop were changed to Leu, respectively, acquired higher intrinsic kinase activity and retained the normal MAPKK activation property. The expression of MPK6 mutants with basal activity is sufficient to induce camalexin biosynthesis; however, to induce ethylene and leaf senescence, the expression of MPK6 mutants with higher activity is required. The results suggest that these mutants can be used to analyze the specific biological functions of MPK6.


    Organizational Affiliation

    State Key Laboratory of Plant Physiology and Biochemistry, College of Biological Sciences, China Agricultural University, Beijing 100193, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mitogen-activated protein kinase 6
A, B
370Arabidopsis thalianaMutation(s): 0 
Gene Names: MPK6
EC: 2.7.11.24
Find proteins for Q39026 (Arabidopsis thaliana)
Go to UniProtKB:  Q39026
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.226 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 150.513α = 90.00
b = 150.513β = 90.00
c = 85.624γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
REFMACrefinement
HKL-2000data scaling
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
the National Natural Science Foundation of ChinaChina31125006

Revision History 

  • Version 1.0: 2016-05-25
    Type: Initial release