- EMDB-43085: Symmetry expanded map of 2 gamma-tubulins bound to 2 alpha tubuli... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-43085
タイトル
Symmetry expanded map of 2 gamma-tubulins bound to 2 alpha tubulins in gamma tubulin ring complex capped microtubule end.
マップデータ
Symmetry expanded map of gamma-tubulin:gamma tubulin laterally in contact with each other together with the proximal alpha-tubulins in gamma tubulin ring complex upon microtubule nucleation.
試料
複合体: gamma-tubulin and alpha-tubulin
タンパク質・ペプチド: Tubulin gamma-1 chain
タンパク質・ペプチド: Tubulin alpha-1B chain
リガンド: GUANOSINE-5'-TRIPHOSPHATE
リガンド: MAGNESIUM ION
リガンド: GUANOSINE-5'-DIPHOSPHATE
キーワード
gamma tubulin ring complex / CELL CYCLE
機能・相同性
機能・相同性情報
Post-chaperonin tubulin folding pathway / Cilium Assembly / cytoskeleton-dependent intracellular transport / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Carboxyterminal post-translational modifications of tubulin / Intraflagellar transport / Sealing of the nuclear envelope (NE) by ESCRT-III / Formation of tubulin folding intermediates by CCT/TriC / Gap junction assembly / Kinesins ...Post-chaperonin tubulin folding pathway / Cilium Assembly / cytoskeleton-dependent intracellular transport / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Carboxyterminal post-translational modifications of tubulin / Intraflagellar transport / Sealing of the nuclear envelope (NE) by ESCRT-III / Formation of tubulin folding intermediates by CCT/TriC / Gap junction assembly / Kinesins / COPI-independent Golgi-to-ER retrograde traffic / Assembly and cell surface presentation of NMDA receptors / COPI-dependent Golgi-to-ER retrograde traffic / Recycling pathway of L1 / RHOH GTPase cycle / RHO GTPases activate IQGAPs / microtubule-based process / Hedgehog 'off' state / Activation of AMPK downstream of NMDARs / cytoplasmic microtubule / COPI-mediated anterograde transport / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / MHC class II antigen presentation / Recruitment of NuMA to mitotic centrosomes / cellular response to interleukin-4 / Resolution of Sister Chromatid Cohesion / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / Translocation of SLC2A4 (GLUT4) to the plasma membrane / RHO GTPases Activate Formins / PKR-mediated signaling / structural constituent of cytoskeleton / microtubule cytoskeleton organization / HCMV Early Events / Aggrephagy / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids / mitotic cell cycle / double-stranded RNA binding / microtubule cytoskeleton / 加水分解酵素; 酸無水物に作用; GTPに作用・細胞または細胞小器官の運動に関与 / microtubule / cilium / cell division / GTPase activity / ubiquitin protein ligase binding / GTP binding / structural molecule activity / cytoplasm 類似検索 - 分子機能
National Institutes of Health/National Cancer Institute (NIH/NCI)
GM130234
米国
引用
ジャーナル: Nat Struct Mol Biol / 年: 2024 タイトル: Structure of the γ-tubulin ring complex-capped microtubule. 著者: Amol Aher / Linas Urnavicius / Allen Xue / Kasahun Neselu / Tarun M Kapoor / 要旨: Microtubules are composed of α-tubulin and β-tubulin dimers positioned head-to-tail to form protofilaments that associate laterally in varying numbers. It is not known how cellular microtubules ...Microtubules are composed of α-tubulin and β-tubulin dimers positioned head-to-tail to form protofilaments that associate laterally in varying numbers. It is not known how cellular microtubules assemble with the canonical 13-protofilament architecture, resulting in micrometer-scale α/β-tubulin tracks for intracellular transport that align with, rather than spiral along, the long axis of the filament. We report that the human ~2.3 MDa γ-tubulin ring complex (γ-TuRC), an essential regulator of microtubule formation that contains 14 γ-tubulins, selectively nucleates 13-protofilament microtubules. Cryogenic electron microscopy reconstructions of γ-TuRC-capped microtubule minus ends reveal the extensive intra-domain and inter-domain motions of γ-TuRC subunits that accommodate luminal bridge components and establish lateral and longitudinal interactions between γ-tubulins and α-tubulins. Our structures suggest that γ-TuRC, an inefficient nucleation template owing to its splayed conformation, can transform into a compacted cap at the microtubule minus end and set the lattice architecture of cellular microtubules.
ダウンロード / ファイル: emd_43085.map.gz / 形式: CCP4 / 大きさ: 178 MB / タイプ: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
注釈
Symmetry expanded map of gamma-tubulin:gamma tubulin laterally in contact with each other together with the proximal alpha-tubulins in gamma tubulin ring complex upon microtubule nucleation.
Symmetry expanded map of gamma-tubulin:gamma tubulin laterally in contact with each other together with the proximal alpha-tubulins in gamma tubulin ring complex upon microtubule nucleation.
Symmetry expanded map of gamma-tubulin:gamma tubulin laterally in contact with each other together with the proximal alpha-tubulins in gamma tubulin ring complex upon microtubule nucleation.