2L0Z

Solution structure of a zinc-binding domain from the Junin virus envelope glycoprotein


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 56 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of a Zinc-binding Domain in the Junin Virus Envelope Glycoprotein.

Briknarova, K.Thomas, C.J.York, J.Nunberg, J.H.

(2011) J.Biol.Chem. 286: 1528-1536

  • DOI: 10.1074/jbc.M110.166025

  • PubMed Abstract: 
  • Arenaviruses cause acute hemorrhagic fevers with high mortality. Entry of the virus into the host cell is mediated by the viral envelope glycoprotein, GPC. In contrast to other class I viral envelope glycoproteins, the mature GPC complex contains a c ...

    Arenaviruses cause acute hemorrhagic fevers with high mortality. Entry of the virus into the host cell is mediated by the viral envelope glycoprotein, GPC. In contrast to other class I viral envelope glycoproteins, the mature GPC complex contains a cleaved stable signal peptide (SSP) in addition to the canonical receptor-binding (G1) and transmembrane fusion (G2) subunits. SSP is critical for intracellular transport of the GPC complex to the cell surface and for its membrane-fusion activity. Previous studies have suggested that SSP is retained in GPC through interaction with a zinc-binding domain (ZBD) in the cytoplasmic tail of G2. Here we used NMR spectroscopy to determine the structure of Junín virus (JUNV) ZBD (G2 residues 445-485) and investigate its interaction with a conserved Cys residue (Cys-57) in SSP. We show that JUNV ZBD displays a novel fold containing two zinc ions. One zinc ion is coordinated by His-447, His-449, Cys-455, and His-485. The second zinc ion is coordinated by His-459, Cys-467, and Cys-469 and readily accepts Cys-57 from SSP as the fourth ligand. Our studies describe the structural basis for retention of the unique SSP subunit and suggest a mechanism whereby SSP is positioned in the GPC complex to modulate pH-dependent membrane fusion.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of Montana, Missoula, Montana 59812, USA. klara.briknarova@umontana.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
glycoprotein G2
A
42Junin mammarenavirusMutation(s): 0 
Gene Names: GPC (GP-C)
Find proteins for P26313 (Junin mammarenavirus)
Go to UniProtKB:  P26313
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
ACE
Query on ACE
A
NON-POLYMERC2 H4 O

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Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 56 
  • Conformers Submitted: 21 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2L0Z Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-10
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance