4IXP

Crystal structure of Maternal Embryonic Leucine Zipper Kinase (MELK)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.749 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural basis for the regulation of maternal embryonic leucine zipper kinase.

Cao, L.S.Wang, J.Chen, Y.Deng, H.Wang, Z.X.Wu, J.W.

(2013) Plos One 8: e70031-e70031

  • DOI: 10.1371/journal.pone.0070031

  • PubMed Abstract: 
  • MELK (maternal embryonic leucine zipper kinase), which is a member of the AMPK (AMP-activated protein kinase)-related kinase family, plays important roles in diverse cellular processes and has become a promising drug target for certain cancers. Howev ...

    MELK (maternal embryonic leucine zipper kinase), which is a member of the AMPK (AMP-activated protein kinase)-related kinase family, plays important roles in diverse cellular processes and has become a promising drug target for certain cancers. However, the regulatory mechanism of MELK remains elusive. Here, we report the crystal structure of a fragment of human MELK that contains the kinase domain and ubiquitin-associated (UBA) domain. The UBA domain tightly binds to the back of the kinase domain, which may contribute to the proper conformation and activity of the kinase domain. Interestingly, the activation segment in the kinase domain displays a unique conformation that contains an intramolecular disulfide bond. The structural and biochemical analyses unravel the molecular mechanisms for the autophosphorylation/activation of MELK and the dependence of its catalytic activity on reducing agents. Thus, our results may provide the basis for designing specific MELK inhibitors for cancer treatment.


    Organizational Affiliation

    MOE Key Laboratory of Protein Sciences and Tsinghua-Peking Center for Life Sciences, School of Life Sciences, Tsinghua University, Beijing, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Maternal embryonic leucine zipper kinase
A
348Homo sapiensMutation(s): 2 
Gene Names: MELK (KIAA0175)
EC: 2.7.11.1
Find proteins for Q14680 (Homo sapiens)
Go to Gene View: MELK
Go to UniProtKB:  Q14680
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.749 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.202 
  • Space Group: P 64 2 2
Unit Cell:
Length (Å)Angle (°)
a = 135.449α = 90.00
b = 135.449β = 90.00
c = 153.652γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data collection
PHASERphasing
HKL-2000data reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-09-11
    Type: Initial release