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 

wwPDB Validation 3D Report Full Report


This is version 1.1 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: 10.1016/j.str.2017.05.005
  • Primary Citation of Related Structures:  

  • 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 supre ...

    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-PTPBro1 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tyrosine-protein phosphatase non-receptor type 23
A, B, C, D
361Homo sapiensMutation(s): 0 
Gene Names: PTPN23 (KIAA1471)
EC: 3.1.3.48
Find proteins for Q9H3S7 (Homo sapiens)
Go to Gene View: PTPN23
Go to UniProtKB:  Q9H3S7
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Zinc finger FYVE domain-containing protein 9
E, F
22Homo sapiensMutation(s): 0 
Gene Names: ZFYVE9 (MADHIP, SARA, SMADIP)
Find proteins for O95405 (Homo sapiens)
Go to Gene View: ZFYVE9
Go to UniProtKB:  O95405
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.187 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 66.330α = 111.48
b = 70.360β = 90.06
c = 83.480γ = 93.00
Software Package:
Software NamePurpose
xia2data reduction
xia2data scaling
PHENIXrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2016-12-02 
  • Released Date: 2017-08-16 
  • Deposition Author(s): Levy, C., Gahloth, D.

Revision History 

  • Version 1.0: 2017-08-16
    Type: Initial release
  • Version 1.1: 2017-12-06
    Type: Database references