5K22

Crystal structure of the complex between human PRL-2 phosphatase in reduced state and Bateman domain of human CNNM3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.231 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Phosphocysteine in the PRL-CNNM pathway mediates magnesium homeostasis.

Gulerez, I.Funato, Y.Wu, H.Yang, M.Kozlov, G.Miki, H.Gehring, K.

(2016) EMBO Rep. 17: 1890-1900

  • DOI: 10.15252/embr.201643393

  • PubMed Abstract: 
  • PRLs (phosphatases of regenerating liver) are frequently overexpressed in human cancers and are prognostic markers of poor survival. Despite their potential as therapeutic targets, their mechanism of action is not understood in part due to their weak ...

    PRLs (phosphatases of regenerating liver) are frequently overexpressed in human cancers and are prognostic markers of poor survival. Despite their potential as therapeutic targets, their mechanism of action is not understood in part due to their weak enzymatic activity. Previous studies revealed that PRLs interact with CNNM ion transporters and prevent CNNM4-dependent Mg 2+ transport, which is important for energy metabolism and tumor progression. Here, we report that PRL-CNNM complex formation is regulated by the formation of phosphocysteine. We show that cysteine in the PRL catalytic site is endogenously phosphorylated as part of the catalytic cycle and that phosphocysteine levels change in response to Mg 2+ levels. Phosphorylation blocks PRL binding to CNNM Mg 2+ transporters, and mutations that block the PRL-CNNM interaction prevent regulation of Mg 2+ efflux in cultured cells. The crystal structure of the complex of PRL2 and the CBS-pair domain of the Mg 2+ transporter CNNM3 reveals the molecular basis for the interaction. The identification of phosphocysteine as a regulatory modification opens new perspectives for signaling by protein phosphatases.


    Organizational Affiliation

    Department of Biochemistry and Groupe de recherche axé sur la structure des protéines, McGill University, Montreal, Quebec, Canada.,Department of Cellular Regulation, Research Institute for Microbial Diseases Osaka University, Suita, Osaka, Japan.,Department of Biochemistry and Groupe de recherche axé sur la structure des protéines, McGill University, Montreal, Quebec, Canada hmiki@biken.osaka-u.ac.jp kalle.gehring@mcgill.ca.,Department of Cellular Regulation, Research Institute for Microbial Diseases Osaka University, Suita, Osaka, Japan hmiki@biken.osaka-u.ac.jp kalle.gehring@mcgill.ca.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein tyrosine phosphatase type IVA 2
A
183Homo sapiensMutation(s): 3 
Gene Names: PTP4A2 (PRL2, PTPCAAX2)
EC: 3.1.3.48
Find proteins for Q12974 (Homo sapiens)
Go to Gene View: PTP4A2
Go to UniProtKB:  Q12974
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Metal transporter CNNM3
B
155Homo sapiensMutation(s): 0 
Gene Names: CNNM3 (ACDP3)
Find proteins for Q8NE01 (Homo sapiens)
Go to Gene View: CNNM3
Go to UniProtKB:  Q8NE01
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.274 
  • R-Value Work: 0.231 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 54.447α = 90.00
b = 126.717β = 90.00
c = 152.564γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-10-12
    Type: Initial release
  • Version 1.1: 2018-10-03
    Type: Data collection, Database references, Derived calculations