4IT3

Crystal Structure of Iml3 from S. cerevisiae

4IT3 の概要

• エントリーDOI: 10.2210/pdb4it3/pdb
• 関連するPDBエントリー: 4JE3
• 分子名称: Central kinetochore subunit IML3 (2 entities in total)
• 機能のキーワード: beta sheet, kinetochore, chl4, nucleus, cell cycle
• 由来する生物種: Saccharomyces cerevisiae (Baker's yeast)
• 細胞内の位置: Nucleus: P38265
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 28787.53

構造登録者

Hinshaw, S.M.,Harrison, S.C. (登録日: 2013-01-17, 公開日: 2013-10-16, 最終更新日: 2024-10-30)

主引用文献

Hinshaw, S.M.,Harrison, S.C.
An iml3-chl4 heterodimer links the core centromere to factors required for accurate chromosome segregation.
Cell Rep, 5:29-36, 2013

PubMed Abstract: Accurate segregation of genetic material in eukaryotes relies on the kinetochore, a multiprotein complex that connects centromeric DNA with microtubules. In yeast and humans, two proteins-Mif2/CENP-C and Chl4/CNEP-N-interact with specialized centromeric nucleosomes and establish distinct but cross-connecting axes of chromatin-microtubule linkage. Proteins recruited by Chl4/CENP-N include a subset that regulates chromosome transmission fidelity. We show that Chl4 and a conserved member of this subset, Iml3, both from Saccharomyces cerevisiae, form a stable protein complex that interacts with Mif2 and Sgo1. We have determined the structures of an Iml3 homodimer and an Iml3-Chl4 heterodimer, which suggest a mechanism for regulating the assembly of this functional axis of the kinetochore. We propose that at the core centromere, the Chl4-Iml3 complex participates in recruiting factors, such as Sgo1, that influence sister chromatid cohesion and encourage sister kinetochore biorientation.

PubMed: 24075991
DOI: 10.1016/j.celrep.2013.08.036

実験手法

X-RAY DIFFRACTION (2.495 Å)