Yeast Spc42 C-terminal Antiparallel Coiled-Coil

Experimental Data Snapshot

  • Resolution: 2.44 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Structure and function of Spc42 coiled-coils in yeast centrosome assembly and duplication.

Drennan, A.C.Krishna, S.Seeger, M.A.Andreas, M.P.Gardner, J.M.Sether, E.K.R.Jaspersen, S.L.Rayment, I.

(2019) Mol Biol Cell 30: 1505-1522

  • DOI: https://doi.org/10.1091/mbc.E19-03-0167
  • Primary Citation of Related Structures:  
    6OD2, 6OEC, 6OEI

  • PubMed Abstract: 

    Centrosomes and spindle pole bodies (SPBs) are membraneless organelles whose duplication and assembly is necessary for bipolar mitotic spindle formation. The structural organization and functional roles of major proteins in these organelles can provide critical insights into cell division control. Spc42, a phosphoregulated protein with an N-terminal dimeric coiled-coil (DCC), assembles into a hexameric array at the budding yeast SPB core, where it functions as a scaffold for SPB assembly. Here, we present in vitro and in vivo data to elucidate the structural arrangement and biological roles of Spc42 elements. Crystal structures reveal details of two additional coiled-coils in Spc42: a central trimeric coiled-coil and a C-terminal antiparallel DCC. Contributions of the three Spc42 coiled-coils and adjacent undetermined regions to the formation of an ∼145 Å hexameric lattice in an in vitro lipid monolayer assay and to SPB duplication and assembly in vivo reveal structural and functional redundancy in Spc42 assembly. We propose an updated model that incorporates the inherent symmetry of these Spc42 elements into a lattice, and thereby establishes the observed sixfold symmetry. The implications of this model for the organization of the central SPB core layer are discussed.

  • Organizational Affiliation

    Department of Biochemistry, University of Wisconsin-Madison, WI 53706.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Spindle pole body component SPC4253Saccharomyces cerevisiae FostersBMutation(s): 0 
Gene Names: SPC42FOSTERSB_2873
Find proteins for E7Q664 (Saccharomyces cerevisiae (strain FostersB))
Explore E7Q664 
Go to UniProtKB:  E7Q664
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupE7Q664
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on MSE
Experimental Data & Validation

Experimental Data

  • Resolution: 2.44 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.215 
  • R-Value Observed: 0.217 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 36.499α = 90
b = 36.499β = 90
c = 206.004γ = 120
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
PDB_EXTRACTdata extraction
Cootmodel building

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesP01GM105537

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-24
    Type: Initial release
  • Version 1.1: 2019-06-12
    Changes: Data collection, Database references
  • Version 1.2: 2020-01-01
    Changes: Author supporting evidence