5KTB

Structure of a complex between S. cerevisiae Csm1 and Mam1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.05 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 

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Literature

Molecular architecture of the yeast monopolin complex.

Corbett, K.D.Harrison, S.C.

(2012) Cell Rep 1: 583-589

  • DOI: 10.1016/j.celrep.2012.05.012
  • Primary Citation of Related Structures:  
    5KTB

  • PubMed Abstract: 
  • The Saccharomyces cerevisiae monopolin complex directs proper chromosome segregation in meiosis I by mediating co-orientation of sister kinetochores on the meiosis I spindle. The monopolin subunits Csm1 and Lrs4 form a V-shaped complex that may directly crosslink sister kinetochores ...

    The Saccharomyces cerevisiae monopolin complex directs proper chromosome segregation in meiosis I by mediating co-orientation of sister kinetochores on the meiosis I spindle. The monopolin subunits Csm1 and Lrs4 form a V-shaped complex that may directly crosslink sister kinetochores. We report here biochemical characterization of the monopolin complex subunits Mam1 and Hrr25 and of the complete four-protein monopolin complex. By purifying monopolin subcomplexes with different subunit combinations, we have determined the stoichiometry and overall architecture of the full monopolin complex. We have determined the crystal structure of Csm1 bound to a Mam1 fragment, showing how Mam1 wraps around the Csm1 dimer and alters the stoichiometry of kinetochore-protein binding by Csm1. We further show that the kinase activity of Hrr25 is altered by Mam1 binding, and we identify Hrr25 phosphorylation sites on Mam1 that may affect monopolin complex stability and/or kinetochore binding in meiosis.


    Organizational Affiliation

    Ludwig Institute for Cancer Research, Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA 92093-0660, USA. kcorbett@ucsd.edu



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Monopolin complex subunit CSM1A, B190Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: CSM1SPO86YCR086WYCR86W
UniProt
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:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Monopolin complex subunit MAM1C70Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MAM1YER106W
UniProt
Find proteins for P40065 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P40065 
Go to UniProtKB:  P40065
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.05 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.215 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.851α = 90
b = 101.851β = 90
c = 225.077γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Howard Hughes Medical Institute (HHMI)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2016-07-20
    Type: Initial release
  • Version 1.1: 2019-11-20
    Changes: Author supporting evidence, Data collection, Derived calculations