- EMDB-23639: Single-particle reconstruction of a dimer of the Yeast gamma-TuSC -
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基本情報
登録情報
データベース: EMDB / ID: EMD-23639
タイトル
Single-particle reconstruction of a dimer of the Yeast gamma-TuSC
マップデータ
Single-particle reconstruction of a dimer of the Yeast gamma-TuSC half map 1
試料
複合体: Single-particle reconstruction of a dimer of the Yeast gamma-TuSC
タンパク質・ペプチド: Tub4p (gamma-tubulin)
タンパク質・ペプチド: Spc97p
タンパク質・ペプチド: Spc98p
機能・相同性
機能・相同性情報
gamma-tubulin complex localization to nuclear side of mitotic spindle pole body / protein localization to mitotic spindle pole body / inner plaque of spindle pole body / microtubule nucleation by spindle pole body / outer plaque of spindle pole body / gamma-tubulin small complex / central plaque of spindle pole body / karyogamy involved in conjugation with cellular fusion / regulation of microtubule nucleation / mitotic spindle elongation ...gamma-tubulin complex localization to nuclear side of mitotic spindle pole body / protein localization to mitotic spindle pole body / inner plaque of spindle pole body / microtubule nucleation by spindle pole body / outer plaque of spindle pole body / gamma-tubulin small complex / central plaque of spindle pole body / karyogamy involved in conjugation with cellular fusion / regulation of microtubule nucleation / mitotic spindle elongation / microtubule nucleator activity / mitotic spindle pole body / gamma-tubulin complex / gamma-tubulin ring complex / meiotic spindle organization / positive regulation of microtubule nucleation / microtubule nucleation / positive regulation of cytoplasmic translation / gamma-tubulin binding / spindle pole body / mitotic sister chromatid segregation / spindle assembly / cytoplasmic microtubule organization / mitotic spindle organization / meiotic cell cycle / structural constituent of cytoskeleton / spindle / spindle pole / mitotic cell cycle / protein-containing complex assembly / microtubule / cytoskeleton / calmodulin binding / protein-containing complex binding / GTP binding / nucleus / cytoplasm 類似検索 - 分子機能
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01 GM031627
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35 GM118099
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
P01 GM105537
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
P41 GM103533
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM083960
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM109824
米国
National Science Foundation (NSF, United States)
1144247
米国
National Institutes of Health/Office of the Director
1S10OD020054
米国
National Institutes of Health/Office of the Director
1S10OD021741
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01 GM124149
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
P30 GM124169
米国
Department of Energy (DOE, United States)
DE-AC02-05CH11231
米国
引用
ジャーナル: Elife / 年: 2021 タイトル: CM1-driven assembly and activation of yeast γ-tubulin small complex underlies microtubule nucleation. 著者: Axel F Brilot / Andrew S Lyon / Alex Zelter / Shruthi Viswanath / Alison Maxwell / Michael J MacCoss / Eric G Muller / Andrej Sali / Trisha N Davis / David A Agard / 要旨: Microtubule (MT) nucleation is regulated by the γ-tubulin ring complex (γTuRC), conserved from yeast to humans. In , γTuRC is composed of seven identical γ-tubulin small complex (γTuSC) sub- ...Microtubule (MT) nucleation is regulated by the γ-tubulin ring complex (γTuRC), conserved from yeast to humans. In , γTuRC is composed of seven identical γ-tubulin small complex (γTuSC) sub-assemblies, which associate helically to template MT growth. γTuRC assembly provides a key point of regulation for the MT cytoskeleton. Here, we combine crosslinking mass spectrometry, X-ray crystallography, and cryo-EM structures of both monomeric and dimeric γTuSCs, and open and closed helical γTuRC assemblies in complex with Spc110p to elucidate the mechanisms of γTuRC assembly. γTuRC assembly is substantially aided by the evolutionarily conserved CM1 motif in Spc110p spanning a pair of adjacent γTuSCs. By providing the highest resolution and most complete views of any γTuSC assembly, our structures allow phosphorylation sites to be mapped, surprisingly suggesting that they are mostly inhibitory. A comparison of our structures with the CM1 binding site in the human γTuRC structure at the interface between GCP2 and GCP6 allows for the interpretation of significant structural changes arising from CM1 helix binding to metazoan γTuRC.
ソフトウェア - 名称: cisTEM (ver. 1.0 beta) / 詳細: Final reconstruction in cisTEM
初期モデル
モデルのタイプ: INSILICO MODEL In silico モデル: Particle coordinates were semi-automatically picked from filtered and binned images using the e2boxer swarm tool (Tang et al., 2007). Particles were extracted using Relion ...In silico モデル: Particle coordinates were semi-automatically picked from filtered and binned images using the e2boxer swarm tool (Tang et al., 2007). Particles were extracted using Relion (Scheres, 2012) with a box size of 384 physical pixels resampled to 96 pixels for initial processing. A dataset of ~50,000 particles from 217 micrographs was used to generate 300 2D classes using Relion 1.3. 23 classes were selected and used in the generation of a gamma-TuSC monomer initial model using the e2initialmodel.py function in EMAN2.