2DOQ

crystal structure of Sfi1p/Cdc31p complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.259 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural role of Sfi1p-centrin filaments in budding yeast spindle pole body duplication.

Li, S.Sandercock, A.M.Conduit, P.Robinson, C.V.Williams, R.L.Kilmartin, J.V.

(2006) J.Cell Biol. 173: 867-877

  • DOI: 10.1083/jcb.200603153
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Centrins are calmodulin-like proteins present in centrosomes and yeast spindle pole bodies (SPBs) and have essential functions in their duplication. The Saccharomyces cerevisiae centrin, Cdc31p, binds Sfi1p on multiple conserved repeats; both protein ...

    Centrins are calmodulin-like proteins present in centrosomes and yeast spindle pole bodies (SPBs) and have essential functions in their duplication. The Saccharomyces cerevisiae centrin, Cdc31p, binds Sfi1p on multiple conserved repeats; both proteins localize to the SPB half-bridge, where the new SPB is assembled. The crystal structures of Sfi1p-centrin complexes containing several repeats show Sfi1p as an alpha helix with centrins wrapped around each repeat and similar centrin-centrin contacts between each repeat. Electron microscopy (EM) shadowing of an Sfi1p-centrin complex with 15 Sfi1 repeats and 15 centrins bound showed filaments 60 nm long, compatible with all the Sfi1 repeats as a continuous alpha helix. Immuno-EM localization of the Sfi1p N and C termini showed Sfi1p-centrin filaments spanning the length of the half-bridge with the Sfi1p N terminus at the SPB. This suggests a model for SPB duplication where the half-bridge doubles in length by association of the Sfi1p C termini, thereby providing a new Sfi1p N terminus to initiate SPB assembly.


    Organizational Affiliation

    Medical Research Council Laboratory of Molecular Biology, Cambridge CB2 2QH, England, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cell division control protein 31
A, B, C
161Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: CDC31 (DSK1)
Find proteins for P06704 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P06704
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SFI1p
D
94Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: SFI1
Find proteins for Q12369 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: SFI1
Go to UniProtKB:  Q12369
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B, C
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.259 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 87.283α = 90.00
b = 92.961β = 90.00
c = 189.358γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SnBphasing
MOSFLMdata reduction
SHARPphasing
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-06-27
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-11
    Type: Refinement description