2LYC

Structure of C-terminal domain of Ska1


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The kinetochore-bound ska1 complex tracks depolymerizing microtubules and binds to curved protofilaments.

Schmidt, J.C.Arthanari, H.Boeszoermenyi, A.Dashkevich, N.M.Wilson-Kubalek, E.M.Monnier, N.Markus, M.Oberer, M.Milligan, R.A.Bathe, M.Wagner, G.Grishchuk, E.L.Cheeseman, I.M.

(2012) Dev.Cell 23: 968-980

  • DOI: 10.1016/j.devcel.2012.09.012

  • PubMed Abstract: 
  • To ensure equal chromosome segregation during mitosis, the macromolecular kinetochore must remain attached to depolymerizing microtubules, which drive chromosome movements. How kinetochores associate with depolymerizing microtubules, which undergo dr ...

    To ensure equal chromosome segregation during mitosis, the macromolecular kinetochore must remain attached to depolymerizing microtubules, which drive chromosome movements. How kinetochores associate with depolymerizing microtubules, which undergo dramatic structural changes forming curved protofilaments, has yet to be defined in vertebrates. Here, we demonstrate that the conserved kinetochore-localized Ska1 complex tracks with depolymerizing microtubule ends and associates with both the microtubule lattice and curved protofilaments. In contrast, the Ndc80 complex, a central player in the kinetochore-microtubule interface, binds only to the straight microtubule lattice and lacks tracking activity. We demonstrate that the Ska1 complex imparts its tracking capability to the Ndc80 complex. Finally, we present a structure of the Ska1 microtubule-binding domain that reveals its interaction with microtubules and its regulation by Aurora B. This work defines an integrated kinetochore-microtubule interface formed by the Ska1 and Ndc80 complexes that associates with depolymerizing microtubules, potentially by interacting with curved microtubule protofilaments.


    Organizational Affiliation

    Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Spindle and kinetochore-associated protein 1 homolog
A
130Caenorhabditis elegansGene Names: ska-1
Find proteins for Q9XWS0 (Caenorhabditis elegans)
Go to UniProtKB:  Q9XWS0
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2LYC Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-24
    Type: Initial release
  • Version 1.1: 2012-11-07
    Type: Database references
  • Version 1.2: 2012-11-28
    Type: Database references