5Y8U

Crystal structure of the C276S mutant of MAP2K7


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.92 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

High-resolution structure discloses the potential for allosteric regulation of mitogen-activated protein kinase kinase 7

Kinoshita, T.Hashimoto, T.Sogabe, Y.Fukada, H.Matsumoto, T.Sawa, M.

(2017) Biochem. Biophys. Res. Commun. 493: 313-317

  • DOI: 10.1016/j.bbrc.2017.09.025
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Mitogen-activated protein kinase kinase 7 (MAP2K7) regulates stress and inflammatory responses, and is an attractive drug discovery target for several diseases including arthritis and cardiac hypertrophy. Intracellular proteins such as MAP2K7 are pro ...

    Mitogen-activated protein kinase kinase 7 (MAP2K7) regulates stress and inflammatory responses, and is an attractive drug discovery target for several diseases including arthritis and cardiac hypertrophy. Intracellular proteins such as MAP2K7 are prone to aggregation due to cysteine-driven oxidation in in vitro experiments. MAP2K7 instability due to the four free cysteine residues on the molecular surface abrogated the crystal growth and led to a low-resolution structure with large residual errors. To acquire a higher resolution structure for promoting rational drug discovery, we explored stable mutants of MAP2K7 by replacing the surface cysteine residues, Cys147, Cys218, Cys276 and Cys296. Single-site mutations, except for Cys147, maintained the specific activity and increased the protein yield, while all the multi-site mutations massively reduced the activity. The C218S mutation drastically augmented the protein production and crystallographic resolution. Furthermore, the C218S crystals grown under microgravity in a space environment yielded a 1.3 Å resolution structure, providing novel insights for drug discovery: the precisely assigned water molecules in the active site, the double conformations in the flexible region and the C-terminal extension bound to the N-terminal region of the adjacent molecules. The latter insight is likely to promote the production of allosteric MAP2K7 inhibitors.


    Organizational Affiliation

    Graduate School of Science, Osaka Prefecture University, Osaka, 599-8531, Japan.,Carna Biosciences, Inc., Hyogo, 650-0047, Japan.,Graduate School of Science, Osaka Prefecture University, Osaka, 599-8531, Japan. Electronic address: kinotk@b.s.osakafu-u.ac.jp.,Rigaku Cooperation, Tokyo, 196-8666, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dual specificity mitogen-activated protein kinase kinase 7
A
323Homo sapiensMutation(s): 1 
Gene Names: MAP2K7 (JNKK2, MEK7, MKK7, PRKMK7, SKK4)
EC: 2.7.12.2
Find proteins for O14733 (Homo sapiens)
Go to Gene View: MAP2K7
Go to UniProtKB:  O14733
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.92 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.230 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 71.534α = 90.00
b = 71.534β = 90.00
c = 262.305γ = 120.00
Software Package:
Software NamePurpose
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2017-08-21 
  • Released Date: 2017-10-11 
  • Deposition Author(s): Kinoshita, T.

Revision History 

  • Version 1.0: 2017-10-11
    Type: Initial release
  • Version 1.1: 2017-10-25
    Type: Database references