5MJY

Crystal structure of the His Domain Protein Tyrosine Phosphatase (HD-PTP/PTPN23) Bro1 domain (SARA complex structure)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural Basis for Specific Interaction of TGF beta Signaling Regulators SARA/Endofin with HD-PTP.

Gahloth, D.Levy, C.Walker, L.Wunderley, L.Mould, A.P.Taylor, S.Woodman, P.Tabernero, L.

(2017) Structure 25: 1011-1024.e4

  • DOI: https://doi.org/10.1016/j.str.2017.05.005
  • Primary Citation of Related Structures:  
    5MJY, 5MJZ, 5MK0, 5MK1, 5MK2, 5MK3

  • PubMed Abstract: 

    SARA and endofin are endosomal adaptor proteins that drive Smad phosphorylation by ligand-activated transforming growth factor β/bone morphogenetic protein (TGFβ/BMP) receptors. We show in this study that SARA and endofin also recruit the tumor supressor HD-PTP, a master regulator of endosomal sorting and ESCRT-dependent receptor downregulation. High-affinity interactions occur between the SARA/endofin N termini, and the conserved hydrophobic region in the HD-PTP Bro1 domain that binds CHMP4/ESCRT-III. CHMP4 engagement is a universal feature of Bro1 proteins, but SARA/endofin binding is specific to HD-PTP. Crystallographic structures of HD-PTP Bro1 in complex with SARA, endofin, and three CHMP4 isoforms revealed that all ligands bind similarly to the conserved site but, critically, only SARA/endofin interact at a neighboring pocket unique to HD-PTP. The structures, together with mutagenesis and binding analysis, explain the high affinity and specific binding of SARA/endofin, and why they compete so effectively with CHMP4. Our data invoke models for how endocytic regulation of TGFβ/BMP signaling is controlled.


  • Organizational Affiliation

    School of Biological Sciences, Faculty of Biology Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester M13 9PT, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Tyrosine-protein phosphatase non-receptor type 23
A, B, C, D
361Homo sapiensMutation(s): 0 
Gene Names: PTPN23KIAA1471
EC: 3.1.3.48
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H3S7 (Homo sapiens)
Explore Q9H3S7 
Go to UniProtKB:  Q9H3S7
GTEx:  ENSG00000076201 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9H3S7
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Zinc finger FYVE domain-containing protein 9
E, F
22Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for O95405 (Homo sapiens)
Explore O95405 
Go to UniProtKB:  O95405
GTEx:  ENSG00000157077 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO95405
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.33α = 111.48
b = 70.36β = 90.06
c = 83.48γ = 93
Software Package:
Software NamePurpose
PHENIXrefinement
xia2data reduction
xia2data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-08-16
    Type: Initial release
  • Version 1.1: 2017-12-06
    Changes: Database references
  • Version 1.2: 2024-01-17
    Changes: Data collection, Database references, Refinement description