4U6U

Crystal Structure of the Cog5-Cog7 complex from Kluyveromyces lactis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Cog5-Cog7 crystal structure reveals interactions essential for the function of a multisubunit tethering complex.

Ha, J.Y.Pokrovskaya, I.D.Climer, L.K.Shimamura, G.R.Kudlyk, T.Jeffrey, P.D.Lupashin, V.V.Hughson, F.M.

(2014) Proc.Natl.Acad.Sci.USA 111: 15762-15767

  • DOI: 10.1073/pnas.1414829111

  • PubMed Abstract: 
  • The conserved oligomeric Golgi (COG) complex is required, along with SNARE and Sec1/Munc18 (SM) proteins, for vesicle docking and fusion at the Golgi. COG, like other multisubunit tethering complexes (MTCs), is thought to function as a scaffold and/o ...

    The conserved oligomeric Golgi (COG) complex is required, along with SNARE and Sec1/Munc18 (SM) proteins, for vesicle docking and fusion at the Golgi. COG, like other multisubunit tethering complexes (MTCs), is thought to function as a scaffold and/or chaperone to direct the assembly of productive SNARE complexes at the sites of membrane fusion. Reflecting this essential role, mutations in the COG complex can cause congenital disorders of glycosylation. A deeper understanding of COG function and dysfunction will likely depend on elucidating its molecular structure. Despite some progress toward this goal, including EM studies of COG lobe A (subunits 1-4) and higher-resolution structures of portions of Cog2 and Cog4, the structures of COG's eight subunits and the principles governing their assembly are mostly unknown. Here, we report the crystal structure of a complex between two lobe B subunits, Cog5 and Cog7. The structure reveals that Cog5 is a member of the complexes associated with tethering containing helical rods (CATCHR) fold family, with homology to subunits of other MTCs including the Dsl1, exocyst, and Golgi-associated retrograde protein (GARP) complexes. The Cog5-Cog7 interaction is analyzed in relation to the Dsl1 complex, the only other CATCHR-family MTC for which subunit interactions have been characterized in detail. Biochemical and functional studies validate the physiological relevance of the observed Cog5-Cog7 interface, indicate that it is conserved from yeast to humans, and demonstrate that its disruption in human cells causes defects in trafficking and glycosylation.


    Organizational Affiliation

    Department of Molecular Biology, Princeton University, Princeton, NJ 08544;




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cog7
A, C
77Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37)Mutation(s): 0 
Find proteins for Q6CXE9 (Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37))
Go to UniProtKB:  Q6CXE9
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Cog5
B, D
290Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37)Mutation(s): 7 
Find proteins for Q6CLE2 (Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37))
Go to UniProtKB:  Q6CLE2
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.190 
  • Space Group: F 4 3 2
Unit Cell:
Length (Å)Angle (°)
a = 335.838α = 90.00
b = 335.838β = 90.00
c = 335.838γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
XDSdata scaling
CBASSdata collection
SCALAdata scaling
SHARPphasing
Cootmodel building
PDB_EXTRACTdata extraction
DENZOdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-10-22
    Type: Initial release
  • Version 1.1: 2014-11-05
    Type: Database references
  • Version 1.2: 2014-11-26
    Type: Database references
  • Version 1.3: 2017-11-22
    Type: Database references, Derived calculations, Other, Refinement description, Source and taxonomy