Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 2.88 kDa 
• Atom Count: 203 
• Modelled Residue Count: 27 
• Deposited Residue Count: 27 
• Unique protein chains: 1

2LIF

Solution Structure of KKGF

• DOI: 10.2210/pdb2LIF/pdb
• BMRB: 17891

• Classification: VIRAL PROTEIN, MEMBRANE PROTEIN
• Organism(s): Hepatitis C virus JFH-1
• Mutation(s): No 


• Deposited: 2011-08-29 Released: 2012-07-11 
• Deposition Author(s): Montserret, R., Penin, F.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 27 
• Selection Criteria: structures with the least restraint violations 

Literature

Structural analysis of hepatitis C virus core-e1 signal Peptide and requirements for cleavage of the genotype 3a signal sequence by signal Peptide peptidase.

Oehler, V., Filipe, A., Montserret, R., da Costa, D., Brown, G., Penin, F., McLauchlan, J.

(2012) J Virol 86: 7818-7828

• PubMed: 22593157 
• DOI: 10.1128/JVI.00457-12
• Primary Citation of Related Structures:  
  2LIF


• PubMed Abstract: 
  

The maturation of the hepatitis C virus (HCV) core protein requires proteolytic processing by two host proteases: signal peptidase (SP) and the intramembrane-cleaving protease signal peptide peptidase (SPP). Previous work on HCV genotype 1a (GT1a) and GT2a has identified crucial residues required for efficient signal peptide processing by SPP, which in turn has an effect on the production of infectious virus particles. Here we demonstrate that the JFH1 GT2a core-E1 signal peptide can be adapted to the GT3a sequence without affecting the production of infectious HCV. Through mutagenesis studies, we identified crucial residues required for core-E1 signal peptide processing, including a GT3a sequence-specific histidine (His) at position 187. In addition, the stable knockdown of intracellular SPP levels in HuH-7 cells significantly affects HCV virus titers, further demonstrating the requirement for SPP for the maturation of core and the production of infectious HCV particles. Finally, our nuclear magnetic resonance (NMR) structural analysis of a synthetic HCV JFH1 GT2a core-E1 signal peptide provides an essential structural template for a further understanding of core processing as well as the first model for an SPP substrate within its membrane environment. Our findings give deeper insights into the mechanisms of intramembrane-cleaving proteases and the impact on viral infections.

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Organizational Affiliation: 

MRC-University of Glasgow Centre for Virus Research, Glasgow, United Kingdom.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Core protein p21	A	27	Hepatitis C virus JFH-1	Mutation(s): 0  EC: 3.4.22 (UniProt), 3.4.21.98 (UniProt), 3.6.1.15 (UniProt), 3.6.4.13 (UniProt), 2.7.7.48 (UniProt)
Find proteins for Q99IB8 (Hepatitis C virus genotype 2a (isolate JFH-1)) Explore Q99IB8  Go to UniProtKB:  Q99IB8

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 27 
• Selection Criteria: structures with the least restraint violations 
• OLDERADO: 2LIF Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-08-29 
• Released Date: 2012-07-11 
Deposition Author(s): Montserret, R., Penin, F.

Revision History  

• Version 1.0: 2012-07-11
  Type: Initial release
  
• Version 1.1: 2012-07-25
  Changes: Database references