4O27

Crystal structure of MST3-MO25 complex with WIF motif

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.19 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.203 

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Literature

Structural insights into regulatory mechanisms of MO25-mediated kinase activation.

Hao, Q., Feng, M., Shi, Z., Li, C., Chen, M., Wang, W., Zhang, M., Jiao, S., Zhou, Z.

(2014) J Struct Biol 186: 224-233

  • DOI: 10.1016/j.jsb.2014.04.005
  • Primary Citation of Related Structures:  
    4O27, 4NZW

  • PubMed Abstract: 

    • The tumor suppressor kinase LKB1 and germinal center kinases (GCKs) are key regulators of various cellular functions. The adaptor molecule MO25 not only recruits and activates LKB1 through the pseudokinase STRAD, but also may directly activate GCKs l ...

    The tumor suppressor kinase LKB1 and germinal center kinases (GCKs) are key regulators of various cellular functions. The adaptor molecule MO25 not only recruits and activates LKB1 through the pseudokinase STRAD, but also may directly activate GCKs like MST3, MST4, STK25, OSR1 and SPAK. Targeting MO25 in a pathological setting has been recently studied in mouse. Yet the regulatory mechanism of MO25-mediated kinase activation is not fully understood. Here, our structural studies of MO25-related kinases reveal that MO25 binds to and activates GCK kinases or pseudokinase through a unified structural mechanism, featuring an active conformation of the αC helix and A-loop stabilized by MO25. Compared to GCKs that are directly activated by MO25-binding, activation of LKB1 has evolved additional layer of regulatory machinery, i.e., MO25 "activates" the pseudokinase STRAD, which in turn activates LKB1. Importantly, the structures of MO25α-STK25 and MO25α-MST3 determined in this work represent a transition/intermediate state and a fully activated state, respectively during the MO25-mediated kinase activating process.

    Organizational Affiliation: 

    Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China. Electronic address: zczhou@sibcb.ac.cn.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Calcium-binding protein 39A325Homo sapiensMutation(s): 0 
Gene Names: CAB39, CGI-66, MO25
Find proteins for Q9Y376 (Homo sapiens)
Explore Q9Y376 
Go to UniProtKB:  Q9Y376
NIH Common Fund Data Resources
PHAROS  Q9Y376
GTEx  ENSG00000135932
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein kinase 24B281Homo sapiensMutation(s): 1 
Gene Names: MST3, STK24, STK3
EC: 2.7.11.1
Find proteins for Q9Y6E0 (Homo sapiens)
Explore Q9Y6E0 
Go to UniProtKB:  Q9Y6E0
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PHAROS  Q9Y6E0
GTEx  ENSG00000102572
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
5-mer peptide from serine/threonine-protein kinase 24C5N/AMutation(s): 1 
EC: 2.7.11.1
Find proteins for Q9Y6E0 (Homo sapiens)
Explore Q9Y6E0 
Go to UniProtKB:  Q9Y6E0
NIH Common Fund Data Resources
PHAROS  Q9Y6E0
GTEx  ENSG00000102572
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP
Download Ideal Coordinates CCD File 
B
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N		 Ligand Interaction
MN
Query on MN
Download Ideal Coordinates CCD File 
B
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.19 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.203 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 119.111α = 90
b = 119.111β = 90
c = 149.258γ = 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 

  • Version 1.0: 2014-12-03
    Type: Initial release