5IIT

Structure of SPX domain of the yeast inorganic polyphophate polymerase Vtc4 crystallized by carrier-driven crystallization in fusion with the macro domain of human histone macroH2A1.1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.13 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.213 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Control of eukaryotic phosphate homeostasis by inositol polyphosphate sensor domains.

Wild, R.Gerasimaite, R.Jung, J.Y.Truffault, V.Pavlovic, I.Schmidt, A.Saiardi, A.Jessen, H.J.Poirier, Y.Hothorn, M.Mayer, A.

(2016) Science 352: 986-990

  • DOI: 10.1126/science.aad9858
  • Primary Citation of Related Structures:  
    5IIQ, 5IIT, 5IIG, 5IJP, 5IJH, 5IJJ

  • PubMed Abstract: 
  • Phosphorus is a macronutrient taken up by cells as inorganic phosphate (P(i)). How cells sense cellular P(i) levels is poorly characterized. Here, we report that SPX domains--which are found in eukaryotic phosphate transporters, signaling proteins, and inorganic polyphosphate polymerases--provide a basic binding surface for inositol polyphosphate signaling molecules (InsPs), the concentrations of which change in response to P(i) availability ...

    Phosphorus is a macronutrient taken up by cells as inorganic phosphate (P(i)). How cells sense cellular P(i) levels is poorly characterized. Here, we report that SPX domains--which are found in eukaryotic phosphate transporters, signaling proteins, and inorganic polyphosphate polymerases--provide a basic binding surface for inositol polyphosphate signaling molecules (InsPs), the concentrations of which change in response to P(i) availability. Substitutions of critical binding surface residues impair InsP binding in vitro, inorganic polyphosphate synthesis in yeast, and P(i) transport in Arabidopsis In plants, InsPs trigger the association of SPX proteins with transcription factors to regulate P(i) starvation responses. We propose that InsPs communicate cytosolic P(i) levels to SPX domains and enable them to interact with a multitude of proteins to regulate P(i) uptake, transport, and storage in fungi, plants, and animals.


    Organizational Affiliation

    Department of Biochemistry, University of Lausanne, Lausanne, Switzerland. yves.poirier@unil.ch michael.hothorn@unige.ch andreas.mayer@unil.ch.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Vacuolar transporter chaperone 4,Core histone macro-H2A.1A, B, C, D374Saccharomyces cerevisiae S288CHomo sapiens
This entity is chimeric
Mutation(s): 0 
Gene Names: VTC4PHM3YJL012CJ1345H2AFYMACROH2A1
UniProt & NIH Common Fund Data Resources
Find proteins for P47075 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P47075 
Go to UniProtKB:  P47075
Find proteins for O75367 (Homo sapiens)
Explore O75367 
Go to UniProtKB:  O75367
PHAROS:  O75367
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MES
Query on MES

Download Ideal Coordinates CCD File 
E [auth A], J [auth B], M [auth C], R [auth D]2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
F [auth A], K [auth B], N [auth C], S [auth D]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
EDO
Query on EDO

Download Ideal Coordinates CCD File 
G [auth A], H [auth A], I [auth B], O [auth C], P [auth C]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
L [auth B], Q [auth C]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.13 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.213 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.64α = 90
b = 67.922β = 93.32
c = 129.677γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2016-03-01 
  • Released Date: 2016-04-27 
  • Deposition Author(s): Wild, R., Hothorn, M.

Funding OrganizationLocationGrant Number
European Research CouncilSwitzerland310856

Revision History  (Full details and data files)

  • Version 1.0: 2016-04-27
    Type: Initial release
  • Version 1.1: 2016-06-01
    Changes: Database references