3N4S | pdb_00003n4s

Structure of Csm1 C-terminal domain, P21212 form

PDB DOI: https://doi.org/10.2210/pdb3N4S/pdb

Classification: REPLICATION
Organism(s): Saccharomyces cerevisiae
Expression System: Escherichia coli BL21(DE3)
Mutation(s): No

Deposited: 2010-05-22 Released: 2010-09-01
Deposition Author(s): Corbett, K.D., Harrison, S.C.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.35 Å
R-Value Free:
0.234 (Depositor), 0.229 (DCC)
R-Value Work:
0.207 (Depositor), 0.203 (DCC)
R-Value Observed:
0.209 (Depositor)

Starting Model: experimental
View more details

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

PubMed: 20723757 Search on PubMed Search on PubMed Central
DOI: https://doi.org/10.1016/j.cell.2010.07.017
Primary Citation Related Structures:
3N4R, 3N4S, 3N4X, 3N7N

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. 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.

Macromolecule Content

Total Structure Weight: 55.44 kDa
Atom Count: 3,575
Modeled Residue Count: 398
Deposited Residue Count: 464
Unique protein chains: 1

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Monopolin complex subunit CSM1	A, B, C, D	116	Saccharomyces cerevisiae	Mutation(s): 0 Gene Names: CSM1, SPO86, YCR086W, YCR86W
UniProt
Find proteins for P25651 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P25651 Go to UniProtKB: P25651
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P25651
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
1PE Query on 1PE Download:Ideal Coordinates CCD File SDF format, chain E [auth B] SDF format, chain F [auth B] SDF format, chain G [auth B] SDF format, chain H [auth C] SDF format, chain I [auth C] SDF format, chain J [auth D] SDF format, chain K [auth D] SDF format, chain L [auth D] SDF format, chain M [auth D] SDF format, chain N [auth D] MOL2 format, chain E [auth B] MOL2 format, chain F [auth B] MOL2 format, chain G [auth B] MOL2 format, chain H [auth C] MOL2 format, chain I [auth C] MOL2 format, chain J [auth D] MOL2 format, chain K [auth D] MOL2 format, chain L [auth D] MOL2 format, chain M [auth D] MOL2 format, chain N [auth D] mmCIF format, chain E [auth B] mmCIF format, chain F [auth B] mmCIF format, chain G [auth B] mmCIF format, chain H [auth C] mmCIF format, chain I [auth C] mmCIF format, chain J [auth D] mmCIF format, chain K [auth D] mmCIF format, chain L [auth D] mmCIF format, chain M [auth D] mmCIF format, chain N [auth D]	E [auth B] F [auth B] G [auth B] H [auth C] I [auth C] E [auth B], F [auth B], G [auth B], H [auth C], I [auth C], J [auth D], K [auth D], L [auth D], M [auth D], N [auth D]	PENTAETHYLENE GLYCOL C₁₀ H₂₂ O₆ JLFNLZLINWHATN-UHFFFAOYSA-N		Interactions Focus chain E [auth B] Focus chain F [auth B] Focus chain G [auth B] Focus chain H [auth C] Focus chain I [auth C] Focus chain J [auth D] Focus chain K [auth D] Focus chain L [auth D] Focus chain M [auth D] Focus chain N [auth D] Interactions & Density Focus chain E [auth B] Focus chain F [auth B] Focus chain G [auth B] Focus chain H [auth C] Focus chain I [auth C] Focus chain J [auth D] Focus chain K [auth D] Focus chain L [auth D] Focus chain M [auth D] Focus chain N [auth D]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.35 Å
R-Value Free: 0.234 (Depositor), 0.229 (DCC)
R-Value Work: 0.207 (Depositor), 0.203 (DCC)
R-Value Observed: 0.209 (Depositor)

Diffraction Data:

Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 69.975	α = 90
b = 134.044	β = 90
c = 54.419	γ = 90

Software Package:

Software Name	Purpose
ADSC	data collection
PHASER	phasing
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

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View more in-depth experimental data

Entry History

Deposition Data

Released Date: 2010-09-01

Deposition Author(s):

Corbett, K.D.

Harrison, S.C.

Revision History (Full details and data files)

Version 1.0: 2010-09-01
Type: Initial release
Version 1.1: 2011-07-13
Changes: Version format compliance
Version 1.2: 2023-09-06
Changes: Data collection, Database references, Derived calculations, Refinement description