3N7N

Structure of Csm1/Lrs4 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.90 Å
  • R-Value Free: 0.355 
  • R-Value Work: 0.333 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The Monopolin Complex Crosslinks Kinetochore Components to Regulate Chromosome-Microtubule Attachments.

Corbett, K.D.Yip, C.K.Ee, L.S.Walz, T.Amon, A.Harrison, S.C.

(2010) Cell 142: 556-567

  • DOI: 10.1016/j.cell.2010.07.017
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The monopolin complex regulates different types of kinetochore-microtubule attachments in fungi, ensuring sister chromatid co-orientation in Saccharomyces cerevisiae meiosis I and inhibiting merotelic attachment in Schizosaccharomyces pombe mitosis. ...

    The monopolin complex regulates different types of kinetochore-microtubule attachments in fungi, ensuring sister chromatid co-orientation in Saccharomyces cerevisiae meiosis I and inhibiting merotelic attachment in Schizosaccharomyces pombe mitosis. In addition, the monopolin complex maintains the integrity and silencing of ribosomal DNA (rDNA) repeats in the nucleolus. We show here that the S. cerevisiae Csm1/Lrs4 monopolin subcomplex has a distinctive V-shaped structure, with two pairs of protein-protein interaction domains positioned approximately 10 nm apart. Csm1 presents a conserved hydrophobic surface patch that binds two kinetochore proteins: Dsn1, a subunit of the outer-kinetochore MIND/Mis12 complex, and Mif2/CENP-C. Csm1 point-mutations that disrupt kinetochore-subunit binding also disrupt sister chromatid co-orientation in S. cerevisiae meiosis I. We further show that the same Csm1 point-mutations affect rDNA silencing, probably by disrupting binding to the rDNA-associated protein Tof2. We propose that Csm1/Lrs4 functions as a molecular clamp, crosslinking kinetochore components to enforce sister chromatid co-orientation in S. cerevisiae meiosis I and to suppress merotelic attachment in S. pombe mitosis, and crosslinking rDNA repeats to aid rDNA silencing.


    Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, 250 Longwood Avenue, Boston, MA 02115, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Monopolin complex subunit CSM1A, B, C, D190Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: CSM1SPO86YCR086WYCR86W
Find proteins for P25651 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P25651 
Go to UniProtKB:  P25651
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Monopolin complex subunit LRS4E, F95Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: D9461.25LRS4YDR439W
Find proteins for Q04087 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q04087 
Go to UniProtKB:  Q04087
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.90 Å
  • R-Value Free: 0.355 
  • R-Value Work: 0.333 
  • Space Group: P 3 2 1
  • Diffraction Data DOI: 10.15785/SBGRID/25 SBGrid
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 152.624α = 90
b = 152.624β = 90
c = 118.794γ = 120
Software Package:
Software NamePurpose
CNSrefinement
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
ADSCdata collection

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-09-01
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2019-07-17
    Changes: Data collection, Refinement description