5TWF

Regulation of protein interactions by MOB1 phosphorylation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.14 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.263 
  • R-Value Observed: 0.265 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Regulation of Protein Interactions by Mps One Binder (MOB1) Phosphorylation.

Xiong, S.Couzens, A.L.Kean, M.J.Mao, D.Y.Guettler, S.Kurinov, I.Gingras, A.C.Sicheri, F.

(2017) Mol Cell Proteomics 16: 1111-1125

  • DOI: https://doi.org/10.1074/mcp.M117.068130
  • Primary Citation of Related Structures:  
    5TWF

  • PubMed Abstract: 

    MOB1 is a multifunctional protein best characterized for its integrative role in regulating Hippo and NDR pathway signaling in metazoans and the Mitotic Exit Network in yeast. Human MOB1 binds both the upstream kinases MST1 and MST2 and the downstream AGC group kinases LATS1, LATS2, NDR1, and NDR2. Binding of MOB1 to MST1 and MST2 is mediated by its phosphopeptide-binding infrastructure, the specificity of which matches the phosphorylation consensus of MST1 and MST2. On the other hand, binding of MOB1 to the LATS and NDR kinases is mediated by a distinct interaction surface on MOB1. By assembling both upstream and downstream kinases into a single complex, MOB1 facilitates the activation of the latter by the former through a trans-phosphorylation event. Binding of MOB1 to its upstream partners also renders MOB1 a substrate, which serves to differentially regulate its two protein interaction activities (at least in vitro ). Our previous interaction proteomics analysis revealed that beyond associating with MST1 (and MST2), MOB1A and MOB1B can associate in a phosphorylation-dependent manner with at least two other signaling complexes, one containing the Rho guanine exchange factors (DOCK6-8) and the other containing the serine/threonine phosphatase PP6. Whether these complexes are recruited through the same mode of interaction as MST1 and MST2 remains unknown. Here, through a comprehensive set of biochemical, biophysical, mutational and structural studies, we quantitatively assess how phosphorylation of MOB1A regulates its interaction with both MST kinases and LATS/NDR family kinases in vitro Using interaction proteomics, we validate the significance of our in vitro studies and also discover that the phosphorylation-dependent recruitment of PP6 phosphatase and Rho guanine exchange factor protein complexes differ in key respects from that elucidated for MST1 and MST2. Together our studies confirm and extend previous work to delineate the intricate regulatory steps in key signaling pathways.


  • Organizational Affiliation

    From the ‡Lunenfeld-Tanenbaum Research Institute, Sinai Health System, Toronto, Ontario, Canada, M5G 1X5.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MOB kinase activator 1A
A, B
216Homo sapiensMutation(s): 1 
Gene Names: MOB1AC2orf6MOB4BMOBK1BMOBKL1B
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H8S9 (Homo sapiens)
Explore Q9H8S9 
Go to UniProtKB:  Q9H8S9
PHAROS:  Q9H8S9
GTEx:  ENSG00000114978 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9H8S9
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.14 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.263 
  • R-Value Observed: 0.265 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.132α = 90
b = 86.16β = 90
c = 138.081γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-04-12
    Type: Initial release
  • Version 1.1: 2017-04-19
    Changes: Database references
  • Version 1.2: 2017-06-14
    Changes: Database references
  • Version 1.3: 2024-03-06
    Changes: Data collection, Database references