4NF9 image
Entry Detail
PDB ID:
4NF9
Keywords:
Title:
Structure of the Knl1/Nsl1 complex
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2013-10-31
Release Date:
2014-03-19
Method Details:
Experimental Method:
Resolution:
2.80 Å
R-Value Free:
0.26
R-Value Work:
0.20
R-Value Observed:
0.20
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Protein CASC5
Chain IDs:A, B
Chain Length:221
Number of Molecules:2
Biological Source:Homo sapiens
Polymer Type:polypeptide(L)
Description:Kinetochore-associated protein NSL1 homolog
Chain IDs:C, D
Chain Length:26
Number of Molecules:2
Biological Source:Homo sapiens
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
MSE A MET SELENOMETHIONINE
Ligand Molecules
Primary Citation
Modular Assembly of RWD Domains on the Mis12 Complex Underlies Outer Kinetochore Organization.
Mol.Cell 53 591 605 (2014)
PMID: 24530301 DOI: 10.1016/j.molcel.2014.01.019

Abstact

Faithful chromosome segregation is mandatory for cell and organismal viability. Kinetochores, large protein assemblies embedded in centromeric chromatin, establish a mechanical link between chromosomes and spindle microtubules. The KMN network, a conserved 10-subunit kinetochore complex, harbors the microtubule-binding interface. RWD domains in the KMN subunits Spc24 and Spc25 mediate kinetochore targeting of the microtubule-binding subunits by interacting with the Mis12 complex, a KMN subcomplex that tethers directly onto the underlying chromatin layer. Here, we show that Knl1, a KMN subunit involved in mitotic checkpoint signaling, also contains RWD domains that bind the Mis12 complex and that mediate kinetochore targeting of Knl1. By reporting the first 3D electron microscopy structure of the KMN network, we provide a comprehensive framework to interpret how interactions of RWD-containing proteins with the Mis12 complex shape KMN network topology. Our observations unveil a regular pattern in the construction of the outer kinetochore.

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Primary Citation of related structures