2DOQ

crystal structure of Sfi1p/Cdc31p complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.259 
  • R-Value Observed: 0.261 

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:  
    2GV5, 2DOQ

  • 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 proteins lo ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cell division control protein 31 ABC161Saccharomyces cerevisiaeMutation(s): 6 
Gene Names: CDC31
Find proteins for P06704 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P06704 
Go to UniProtKB:  P06704
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
SFI1p D94Saccharomyces cerevisiaeMutation(s): 2 
Gene Names: SFI1
Find proteins for Q12369 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q12369 
Go to UniProtKB:  Q12369
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: 0.299 
  • R-Value Work: 0.259 
  • R-Value Observed: 0.261 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.283α = 90
b = 92.961β = 90
c = 189.358γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
CCP4data scaling
SnBphasing
SHARPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

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