MAP2K7 mutant -C218S

Experimental Data Snapshot

  • Resolution: 1.30 Å
  • R-Value Free: 0.167 
  • R-Value Work: 0.127 
  • R-Value Observed: 0.129 

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This is version 1.2 of the entry. See complete history


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: https://doi.org/10.1016/j.bbrc.2017.09.025
  • Primary Citation of Related Structures:  
    5Y8U, 5Y90

  • 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 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.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dual specificity mitogen-activated protein kinase kinase 7323Homo sapiensMutation(s): 1 
UniProt & NIH Common Fund Data Resources
Find proteins for O14733 (Homo sapiens)
Explore O14733 
Go to UniProtKB:  O14733
GTEx:  ENSG00000076984 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO14733
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.30 Å
  • R-Value Free: 0.167 
  • R-Value Work: 0.127 
  • R-Value Observed: 0.129 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.396α = 90
b = 70.607β = 90
c = 92.155γ = 90
Software Package:
Software NamePurpose
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: 2017-10-11
    Type: Initial release
  • Version 1.1: 2017-10-25
    Changes: Database references
  • Version 1.2: 2023-11-22
    Changes: Data collection, Database references, Refinement description