STRUCTURAL PROTEIN / cytoskeleton / microtubules / recombinant human tubulin / tubulin isotype
機能・相同性
機能・相同性情報
Post-chaperonin tubulin folding pathway / cytoskeleton-dependent intracellular transport / Cargo trafficking to the periciliary membrane / Carboxyterminal post-translational modifications of tubulin / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Sealing of the nuclear envelope (NE) by ESCRT-III / Intraflagellar transport / Formation of tubulin folding intermediates by CCT/TriC / Gap junction assembly / positive regulation of axon guidance ...Post-chaperonin tubulin folding pathway / cytoskeleton-dependent intracellular transport / Cargo trafficking to the periciliary membrane / Carboxyterminal post-translational modifications of tubulin / Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Sealing of the nuclear envelope (NE) by ESCRT-III / Intraflagellar transport / Formation of tubulin folding intermediates by CCT/TriC / Gap junction assembly / positive regulation of axon guidance / Kinesins / Prefoldin mediated transfer of substrate to CCT/TriC / Assembly and cell surface presentation of NMDA receptors / COPI-independent Golgi-to-ER retrograde traffic / sperm principal piece / COPI-dependent Golgi-to-ER retrograde traffic / intercellular bridge / sperm end piece / Recycling pathway of L1 / RHOH GTPase cycle / ciliary tip / RHO GTPases activate IQGAPs / cytoplasmic microtubule / Hedgehog 'off' state / COPI-mediated anterograde transport / microtubule-based process / Activation of AMPK downstream of NMDARs / MHC class II antigen presentation / Recruitment of NuMA to mitotic centrosomes / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / Resolution of Sister Chromatid Cohesion / Translocation of SLC2A4 (GLUT4) to the plasma membrane / neuron migration / cerebral cortex development / RHO GTPases Activate Formins / microtubule cytoskeleton organization / PKR-mediated signaling / mitotic spindle / modulation of chemical synaptic transmission / Schaffer collateral - CA1 synapse / structural constituent of cytoskeleton / HCMV Early Events / Aggrephagy / microtubule cytoskeleton / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids / mitotic cell cycle / neuron differentiation / cilium / double-stranded RNA binding / microtubule / cell division / 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 / protein heterodimerization activity / ubiquitin protein ligase binding / GTPase activity / GTP binding / structural molecule activity / metal ion binding / nucleus / cytoplasm 類似検索 - 分子機能
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)
GM65933
米国
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)
7DP5OD017885
米国
引用
ジャーナル: Dev Cell / 年: 2018 タイトル: Human β-Tubulin Isotypes Can Regulate Microtubule Protofilament Number and Stability. 著者: Shih-Chieh Ti / Gregory M Alushin / Tarun M Kapoor / 要旨: Cell biological studies have shown that protofilament number, a fundamental feature of microtubules, can correlate with the expression of different tubulin isotypes. However, it is not known if ...Cell biological studies have shown that protofilament number, a fundamental feature of microtubules, can correlate with the expression of different tubulin isotypes. However, it is not known if tubulin isotypes directly control this basic microtubule property. Here, we report high-resolution cryo-EM reconstructions (3.5-3.65 Å) of purified human α1B/β3 and α1B/β2B microtubules and find that the β-tubulin isotype can determine protofilament number. Comparisons of atomic models of 13- and 14-protofilament microtubules reveal how tubulin subunit plasticity, manifested in "accordion-like" distributed structural changes, can accommodate distinct lattice organizations. Furthermore, compared to α1B/β3 microtubules, α1B/β2B filaments are more stable to passive disassembly and against depolymerization by MCAK or chTOG, microtubule-associated proteins with distinct mechanisms of action. Mixing tubulin isotypes in different proportions results in microtubules with protofilament numbers and stabilities intermediate to those of isotypically pure filaments. Together, our findings indicate that microtubule protofilament number and stability can be controlled through β-tubulin isotype composition.