7K36

Cryo-EM structure of STRIPAK complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Cryo-EM structure of the Hippo signaling integrator human STRIPAK.

Jeong, B.C.Bae, S.J.Ni, L.Zhang, X.Bai, X.C.Luo, X.

(2021) Nat Struct Mol Biol 28: 290-299

  • DOI: 10.1038/s41594-021-00564-y
  • Primary Citation of Related Structures:  
    7K36

  • PubMed Abstract: 
  • The striatin-interacting phosphatase and kinase (STRIPAK) complex is a large, multisubunit protein phosphatase 2A (PP2A) assembly that integrates diverse cellular signals in the Hippo pathway to regulate cell proliferation and survival. The architecture and assembly mechanism of this critical complex are poorly understood ...

    The striatin-interacting phosphatase and kinase (STRIPAK) complex is a large, multisubunit protein phosphatase 2A (PP2A) assembly that integrates diverse cellular signals in the Hippo pathway to regulate cell proliferation and survival. The architecture and assembly mechanism of this critical complex are poorly understood. Using cryo-EM, we determine the structure of the human STRIPAK core comprising PP2AA, PP2AC, STRN3, STRIP1, and MOB4 at 3.2-Å resolution. Unlike the canonical trimeric PP2A holoenzyme, STRIPAK contains four copies of STRN3 and one copy of each the PP2AA-C heterodimer, STRIP1, and MOB4. The STRN3 coiled-coil domains form an elongated homotetrameric scaffold that links the complex together. An inositol hexakisphosphate (IP 6 ) is identified as a structural cofactor of STRIP1. Mutations of key residues at subunit interfaces disrupt the integrity of STRIPAK, causing aberrant Hippo pathway activation. Thus, STRIPAK is established as a noncanonical PP2A complex with four copies of regulatory STRN3 for enhanced signal integration.


    Organizational Affiliation

    Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX, USA. Xuelian.Luo@UTSouthwestern.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein phosphatase 2A 65 kDa regulatory subunit A alpha isoformA589Homo sapiensMutation(s): 0 
Gene Names: PPP2R1A
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PHAROS:  P30153
GTEx:  ENSG00000105568 
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UniProt GroupP30153
Protein Feature View
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Striatin-3B, D, E, F, G713Homo sapiensMutation(s): 0 
Gene Names: STRN3GS2NASG2NA
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PHAROS:  Q13033
GTEx:  ENSG00000196792 
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UniProt GroupQ13033
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein phosphatase 2A catalytic subunit alpha isoformC309Homo sapiensMutation(s): 0 
Gene Names: PPP2CA
EC: 3.1.3.16
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Find proteins for P67775 (Homo sapiens)
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PHAROS:  P67775
GTEx:  ENSG00000113575 
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UniProt GroupP67775
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
MOB-like protein phoceinH225Homo sapiensMutation(s): 0 
Gene Names: MOB4MOB3MOBKL3PHOCNPREI3CGI-95
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PHAROS:  Q9Y3A3
GTEx:  ENSG00000115540 
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UniProt GroupQ9Y3A3
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Striatin-interacting protein 1I837Homo sapiensMutation(s): 0 
Gene Names: STRIP1FAM40AKIAA1761
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GTEx:  ENSG00000143093 
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Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IHP
Query on IHP

Download Ideal Coordinates CCD File 
N [auth I]INOSITOL HEXAKISPHOSPHATE
C6 H18 O24 P6
IMQLKJBTEOYOSI-GPIVLXJGSA-N
 Ligand Interaction
ZN
Query on ZN

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L [auth H],
M [auth H]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
MN
Query on MN

Download Ideal Coordinates CCD File 
J [auth C],
K [auth C]
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM132275
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesCA220283
Welch FoundationUnited StatesI-1932
Welch FoundationUnited StatesI-1944
Welch FoundationUnited StatesI-1702

Revision History  (Full details and data files)

  • Version 1.0: 2021-03-10
    Type: Initial release
  • Version 1.1: 2021-03-24
    Changes: Database references