2WVO | pdb_00002wvo

Structure of the HET-S N-terminal domain

• PDB DOI: https://doi.org/10.2210/pdb2WVO/pdb

• Classification: PRION-BINDING PROTEIN
• Organism(s): Podospora anserina
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2009-10-19 Released: 2010-07-28 
• Deposition Author(s): Greenwald, J., Buhtz, C., Ritter, C., Kwiatkowski, W., Choe, S., Saupe, S.J., Riek, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 
  0.257 (Depositor), 0.282 (DCC) 
• R-Value Work: 
  0.225 (Depositor), 0.261 (DCC) 
• R-Value Observed: 
  0.227 (Depositor) 

Starting Model: experimental

Literature

The Mechanism of Prion Inhibition by Het-S.

Greenwald, J., Buhtz, C., Ritter, C., Kwiatkowski, W., Choe, S., Maddelein, M.L., Ness, F., Cescau, S., Soragni, A., Leitz, D., Saupe, S.J., Riek, R.

(2010) Mol Cell 38: 889

• PubMed: 20620958 
• DOI: https://doi.org/10.1016/j.molcel.2010.05.019
• Primary Citation Related Structures: 
  2WVN, 2WVO, 2WVQ


• PubMed Abstract: 
  

  HET-S (97% identical to HET-s) has an N-terminal globular domain that exerts a prion-inhibitory effect in cis on its own prion-forming domain (PFD) and in trans on HET-s prion propagation. We show that HET-S fails to form fibrils in vitro and that it inhibits HET-s PFD fibrillization in trans. In vivo analyses indicate that beta-structuring of the HET-S PFD is required for HET-S activity. The crystal structures of the globular domains of HET-s and HET-S are highly similar, comprising a helical fold, while NMR-based characterizations revealed no differences in the conformations of the PFDs. We conclude that prion inhibition is not encoded by structure but rather in stability and oligomerization properties: when HET-S forms a prion seed or is incorporated into a HET-s fibril via its PFD, the beta-structuring in this domain induces a change in its globular domain, generating a molecular species that is incompetent for fibril growth.

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Organizational Affiliation: 
• Laboratory of Physical Chemistry, ETH Zürich, Wolfgang-Pauli-Strasse 10, 8093 Zürich, Switzerland.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 52.46 kDa 
• Atom Count: 3,672 
• Modeled Residue Count: 444 
• Deposited Residue Count: 466 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
SMALL S PROTEIN	A, B	233	Podospora anserina	Mutation(s): 0
UniProt
Find proteins for B2ACC7 (Podospora anserina (strain S / ATCC MYA-4624 / DSM 980 / FGSC 10383)) Explore B2ACC7  Go to UniProtKB:  B2ACC7

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CL	C [auth A], D [auth A], E [auth A], F [auth B]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free:  0.257 (Depositor), 0.282 (DCC) 
• R-Value Work:  0.225 (Depositor), 0.261 (DCC) 
• R-Value Observed: 0.227 (Depositor) 

Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 95.26	α = 90
b = 95.26	β = 90
c = 170.65	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XDS	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-07-28 
Deposition Author(s): Greenwald, J., Buhtz, C., Ritter, C., Kwiatkowski, W., Choe, S., Saupe, S.J., Riek, R.

Revision History  

• Version 1.0: 2010-07-28
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Refinement description, Version format compliance
• Version 1.2: 2019-05-08
  Changes: Data collection, Experimental preparation, Other
• Version 1.3: 2023-12-20
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description