4NZW

Crystal Structure of STK25-MO25 Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.58 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.214 

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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:  
    4NZW, 4O27

  • 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 like MST3, MST4, STK25, OSR1 and SPAK ...

    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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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Calcium-binding protein 39A331Homo sapiensMutation(s): 0 
Gene Names: CAB39CGI-66MO25
UniProt & NIH Common Fund Data Resources
Find proteins for Q9Y376 (Homo sapiens)
Explore Q9Y376 
Go to UniProtKB:  Q9Y376
PHAROS:  Q9Y376
GTEx:  ENSG00000135932 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9Y376
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein kinase 25B295Homo sapiensMutation(s): 1 
Gene Names: SOK1STK25YSK1
EC: 2.7.11.1
UniProt & NIH Common Fund Data Resources
Find proteins for O00506 (Homo sapiens)
Explore O00506 
Go to UniProtKB:  O00506
PHAROS:  O00506
GTEx:  ENSG00000115694 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO00506
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
J60
Query on J60

Download Ideal Coordinates CCD File 
C [auth B]5-[(E)-(5-CHLORO-2-OXO-1,2-DIHYDRO-3H-INDOL-3-YLIDENE)METHYL]-N-[2-(DIETHYLAMINO)ETHYL]-2,4-DIMETHYL-1H-PYRROLE-3-CARBOXAMIDE
C22 H27 Cl N4 O2
XPLJEFSRINKZLC-ATVHPVEESA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.58 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.214 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.718α = 90
b = 116.718β = 90
c = 126.81γ = 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  (Full details and data files)

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