4U6U

Crystal Structure of the Cog5-Cog7 complex from Kluyveromyces lactis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.193 

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 U S A 111: 15762-15767

  • DOI: 10.1073/pnas.1414829111
  • Primary Citation of Related Structures:  
    4U6U

  • 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/or chaperone to direct the assembly of productive SNARE complexes at the sites of membrane fusion ...

    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; hughson@princeton.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cog7A, C77Kluyveromyces lactisMutation(s): 0 
Gene Names: KLLA0A08888gKLLA0_A08888g
Find proteins for Q6CXE9 (Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37))
Explore Q6CXE9 
Go to UniProtKB:  Q6CXE9
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Cog5B, D290Kluyveromyces lactisMutation(s): 7 
Gene Names: KLLA0F03685gKLLA0_F03685g
Find proteins for Q6CLE2 (Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37))
Explore Q6CLE2 
Go to UniProtKB:  Q6CLE2
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.193 
  • Space Group: F 4 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 335.838α = 90
b = 335.838β = 90
c = 335.838γ = 90
Software Package:
Software NamePurpose
CBASSdata collection
XDSdata scaling
SCALAdata scaling
SHARPphasing
PDB_EXTRACTdata extraction
Cootmodel building
PHENIXrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

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