8R35

CryoEM structure of the asymmetric Pho90 dimer from yeast without substrates.


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.12 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Complementary structures of the yeast phosphate transporter Pho90 provide insights into its transport mechanism.

Schneider, S.Kuhlbrandt, W.Yildiz, O.

(2024) Structure 32: 979

  • DOI: https://doi.org/10.1016/j.str.2024.04.005
  • Primary Citation of Related Structures:  
    8R33, 8R34, 8R35

  • PubMed Abstract: 

    Phosphate homeostasis is essential for all living organisms. Low-affinity phosphate transporters are involved in phosphate import and regulation in a range of eukaryotic organisms. We have determined the structures of the Saccharomyces cerevisiae phosphate importer Pho90 by electron cryomicroscopy in two complementary states at 2.3 and 3.1 Å resolution. The symmetrical, outward-open structure in the presence of phosphate indicates bound substrate ions in the binding pocket. In the absence of phosphate, Pho90 assumes an asymmetric structure with one monomer facing inward and one monomer facing outward, providing insights into the transport mechanism. The Pho90 transport domain binds phosphate ions on one side of the membrane, then flips to the other side where the substrate is released. Together with functional experiments, these complementary structures illustrate the transport mechanism of eukaryotic low-affinity phosphate transporters.


  • Organizational Affiliation

    Department of Structural Biology, Max Planck Institute of Biophysics, 60438 Frankfurt am Main, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Low-affinity phosphate transporter PHO90
A, B
881Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: PHO90YJL198WJ0336
Membrane Entity: Yes 
UniProt
Find proteins for P39535 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P39535 
Go to UniProtKB:  P39535
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP39535
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.12 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONcryoSPARC
MODEL REFINEMENTCoot

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Max Planck SocietyGermany--

Revision History  (Full details and data files)

  • Version 1.0: 2024-04-24
    Type: Initial release
  • Version 1.1: 2024-05-15
    Changes: Database references
  • Version 1.2: 2024-07-24
    Changes: Data collection, Database references