4LCB

Structure of Vps4 homolog from Acidianus hospitalis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.08 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.216 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The Oligomeric State of the Active Vps4 AAA ATPase.

Monroe, N.Han, H.Gonciarz, M.D.Eckert, D.M.Karren, M.A.Whitby, F.G.Sundquist, W.I.Hill, C.P.

(2014) J Mol Biol 426: 510-525

  • DOI: 10.1016/j.jmb.2013.09.043
  • Primary Citation of Related Structures:  
    4LCB, 4LGM

  • PubMed Abstract: 
  • The cellular ESCRT (endosomal sorting complexes required for transport) pathway drives membrane constriction toward the cytosol and effects membrane fission during cytokinesis, endosomal sorting, and the release of many enveloped viruses, including the human immunodeficiency virus ...

    The cellular ESCRT (endosomal sorting complexes required for transport) pathway drives membrane constriction toward the cytosol and effects membrane fission during cytokinesis, endosomal sorting, and the release of many enveloped viruses, including the human immunodeficiency virus. A component of this pathway, the AAA ATPase Vps4, provides energy for pathway progression. Although it is established that Vps4 functions as an oligomer, subunit stoichiometry and other fundamental features of the functional enzyme are unclear. Here, we report that although some mutant Vps4 proteins form dodecameric assemblies, active wild-type Saccharomyces cerevisiae and Sulfolobus solfataricus Vps4 enzymes can form hexamers in the presence of ATP and ADP, as assayed by size-exclusion chromatography and equilibrium analytical ultracentrifugation. The Vta1p activator binds hexameric yeast Vps4p without changing the oligomeric state of Vps4p, implying that the active Vta1p-Vps4p complex also contains a single hexameric ring. Additionally, we report crystal structures of two different archaeal Vps4 homologs, whose structures and lattice interactions suggest a conserved mode of oligomerization. Disruption of the proposed hexamerization interface by mutagenesis abolished the ATPase activity of archaeal Vps4 proteins and blocked Vps4p function in S. cerevisiae. These data challenge the prevailing model that active Vps4 is a double-ring dodecamer, and argue that, like other type I AAA ATPases, Vps4 functions as a single ring with six subunits.


    Organizational Affiliation

    Department of Biochemistry, University of Utah School of Medicine, 15 North Medical Drive East RM 4100, Salt Lake City, UT 84112-5650, USA. Electronic address: chris@biochem.utah.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cell division protein CdvC, Vps4A367Acidianus hospitalis W1Mutation(s): 0 
Gene Names: Ahos_1335
Find proteins for F4B4B0 (Acidianus hospitalis (strain W1))
Explore F4B4B0 
Go to UniProtKB:  F4B4B0
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download Ideal Coordinates CCD File 
B [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.08 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.216 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95.962α = 90
b = 95.962β = 90
c = 79.499γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
ADSCdata collection

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-11-06
    Type: Initial release
  • Version 1.1: 2013-11-13
    Changes: Database references
  • Version 1.2: 2014-02-05
    Changes: Database references