5K47

CryoEM structure of the human Polycystin-2/PKD2 TRP channel


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.22 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 2.1 of the entry. See complete history


Literature

Structure of the polycystic kidney disease TRP channel Polycystin-2 (PC2).

Grieben, M.Pike, A.C.Shintre, C.A.Venturi, E.El-Ajouz, S.Tessitore, A.Shrestha, L.Mukhopadhyay, S.Mahajan, P.Chalk, R.Burgess-Brown, N.A.Sitsapesan, R.Huiskonen, J.T.Carpenter, E.P.

(2017) Nat Struct Mol Biol 24: 114-122

  • DOI: https://doi.org/10.1038/nsmb.3343
  • Primary Citation of Related Structures:  
    5K47

  • PubMed Abstract: 

    Mutations in either polycystin-1 (PC1 or PKD1) or polycystin-2 (PC2, PKD2 or TRPP1) cause autosomal-dominant polycystic kidney disease (ADPKD) through unknown mechanisms. Here we present the structure of human PC2 in a closed conformation, solved by electron cryomicroscopy at 4.2-Å resolution. The structure reveals a novel polycystin-specific 'tetragonal opening for polycystins' (TOP) domain tightly bound to the top of a classic transient receptor potential (TRP) channel structure. The TOP domain is formed from two extensions to the voltage-sensor-like domain (VSLD); it covers the channel's endoplasmic reticulum lumen or extracellular surface and encloses an upper vestibule, above the pore filter, without blocking the ion-conduction pathway. The TOP-domain fold is conserved among the polycystins, including the homologous channel-like region of PC1, and is the site of a cluster of ADPKD-associated missense variants. Extensive contacts among the TOP-domain subunits, the pore and the VSLD provide ample scope for regulation through physical and chemical stimuli.


  • Organizational Affiliation

    Structural Genomics Consortium, University of Oxford, Oxford, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Polycystin-2
A, B, C, D
547Homo sapiensMutation(s): 0 
Gene Names: PKD2TRPP2
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q13563 (Homo sapiens)
Explore Q13563 
Go to UniProtKB:  Q13563
PHAROS:  Q13563
GTEx:  ENSG00000118762 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13563
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
E, F, G, H
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.22 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTREFMAC5.8.0135
RECONSTRUCTIONRELION1.3
MODEL REFINEMENTRELION1.3
MODEL REFINEMENTCTFFIND4

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom092809/Z/10/Z

Revision History  (Full details and data files)

  • Version 1.0: 2016-08-24
    Type: Initial release
  • Version 1.1: 2016-12-21
    Changes: Database references
  • Version 1.2: 2017-01-11
    Changes: Database references
  • Version 1.3: 2017-02-15
    Changes: Database references
  • Version 1.4: 2017-08-30
    Changes: Data collection, Experimental preparation
  • Version 1.5: 2018-10-03
    Changes: Data collection, Refinement description
  • Version 1.6: 2018-10-10
    Changes: Data collection, Refinement description, Structure summary
  • Version 1.7: 2019-12-11
    Changes: Other, Structure summary
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2020-10-21
    Changes: Data collection, Structure summary