4UYA

Structure of MLK4 kinase domain with ATPgammaS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.204 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.4 of the entry. See complete history


Literature

Recurrent Mlk4 Loss-of-Function Mutations Suppress Jnk Signaling to Promote Colon Tumorigenesis.

Marusiak, A.A.Stephenson, N.L.Baik, H.Trotter, E.W.Li, Y.Blyth, K.Mason, S.Chapman, P.Puto, L.A.Read, J.A.Brassington, C.Pollard, H.K.Phillips, C.Green, I.Overman, R.Collier, M.Testoni, E.Miller, C.Hunter, T.Sansom, O.J.Brognard, J.

(2016) Cancer Res 76: 724

  • DOI: https://doi.org/10.1158/0008-5472.CAN-15-0701-T
  • Primary Citation of Related Structures:  
    4UY9, 4UYA

  • PubMed Abstract: 

    MLK4 is a member of the mixed-lineage family of kinases that regulate the JNK, p38, and ERK kinase signaling pathways. MLK4 mutations have been identified in various human cancers, including frequently in colorectal cancer, where their function and pathobiological importance have been uncertain. In this study, we assessed the functional consequences of MLK4 mutations in colon tumorigenesis. Biochemical data indicated that a majority of MLK4 mutations are loss-of-function (LOF) mutations that can exert dominant-negative effects. In seeking to understand the abrogated activity of these mutants, we elucidated a new MLK4 catalytic domain structure. To determine whether MLK4 is required to maintain tumorigenic phenotypes, we reconstituted its signaling axis in colon cancer cells harboring MLK4-inactivating mutations. We found that restoring MLK4 activity reduced cell viability, proliferation, and colony formation in vitro and delayed tumor growth in vivo. Mechanistic investigations established that restoring the function of MLK4 selectively induced the JNK pathway and its downstream targets, cJUN, ATF3, and the cyclin-dependent kinase inhibitors CDKN1A and CDKN2B. Our work indicates that MLK4 is a novel tumor-suppressing kinase harboring frequent LOF mutations that lead to diminished signaling in the JNK pathway and enhanced proliferation in colon cancer.


  • Organizational Affiliation

    Signalling Networks in Cancer Group, Cancer Research UK Manchester Institute, The University of Manchester, Manchester, United Kingdom.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MITOGEN-ACTIVATED PROTEIN KINASE KINASE KINASE MLK4340Homo sapiensMutation(s): 3 
EC: 2.7.11.25
UniProt & NIH Common Fund Data Resources
Find proteins for Q5TCX8 (Homo sapiens)
Explore Q5TCX8 
Go to UniProtKB:  Q5TCX8
PHAROS:  Q5TCX8
GTEx:  ENSG00000143674 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5TCX8
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.201 
  • R-Value Observed: 0.204 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 113.011α = 90
b = 35.163β = 96.33
c = 70.022γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
Aimlessdata scaling
AMoREphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-09-30
    Type: Initial release
  • Version 1.1: 2015-12-16
    Changes: Database references
  • Version 1.2: 2016-03-02
    Changes: Database references
  • Version 1.3: 2019-04-24
    Changes: Data collection, Other, Source and taxonomy
  • Version 1.4: 2024-01-10
    Changes: Data collection, Database references, Derived calculations, Other, Refinement description