- EMDB-16435: microtubule decorated with tubulin oligomers in presence of APC C... -
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Basic information
Entry
Database: EMDB / ID: EMD-16435
Title
microtubule decorated with tubulin oligomers in presence of APC C-terminal domain. (here only the microtubule map section is represented)
Map data
Sample
Complex: microtubule
Protein or peptide: Tubulin beta chain
Protein or peptide: Tubulin alpha-1B chain
Ligand: TAXOL
Ligand: GUANOSINE-5'-DIPHOSPHATE
Ligand: MAGNESIUM ION
Ligand: GUANOSINE-5'-TRIPHOSPHATE
Function / homology
Function and homology information
Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Cilium Assembly / Intraflagellar transport / Carboxyterminal post-translational modifications of tubulin / Sealing of the nuclear envelope (NE) by ESCRT-III / Kinesins / Resolution of Sister Chromatid Cohesion / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / COPI-dependent Golgi-to-ER retrograde traffic ...Microtubule-dependent trafficking of connexons from Golgi to the plasma membrane / Cilium Assembly / Intraflagellar transport / Carboxyterminal post-translational modifications of tubulin / Sealing of the nuclear envelope (NE) by ESCRT-III / Kinesins / Resolution of Sister Chromatid Cohesion / Mitotic Prometaphase / EML4 and NUDC in mitotic spindle formation / COPI-dependent Golgi-to-ER retrograde traffic / RHO GTPases activate IQGAPs / COPI-independent Golgi-to-ER retrograde traffic / COPI-mediated anterograde transport / RHO GTPases Activate Formins / MHC class II antigen presentation / HSP90 chaperone cycle for steroid hormone receptors (SHR) in the presence of ligand / Aggrephagy / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids / Recruitment of NuMA to mitotic centrosomes / Hedgehog 'off' state / Hydrolases; Acting on acid anhydrides; Acting on GTP to facilitate cellular and subcellular movement / neuron migration / structural constituent of cytoskeleton / microtubule cytoskeleton organization / microtubule cytoskeleton / mitotic cell cycle / microtubule / GTPase activity / GTP binding / metal ion binding / cytosol / cytoplasm Similarity search - Function
Journal: J Cell Sci / Year: 2023 Title: The mitotic role of adenomatous polyposis coli requires its bilateral interaction with tubulin and microtubules. Authors: Laurence Serre / Julie Delaroche / Angélique Vinit / Guy Schoehn / Eric Denarier / Anne Fourest-Lieuvin / Isabelle Arnal / Abstract: Adenomatous polyposis coli (APC) is a scaffold protein with tumour suppressor properties. Mutations causing the loss of its C-terminal domain (APC-C), which bears cytoskeleton-regulating sequences, ...Adenomatous polyposis coli (APC) is a scaffold protein with tumour suppressor properties. Mutations causing the loss of its C-terminal domain (APC-C), which bears cytoskeleton-regulating sequences, correlate with colorectal cancer. The cellular roles of APC in mitosis are widely studied, but the molecular mechanisms of its interaction with the cytoskeleton are poorly understood. Here, we investigated how APC-C regulates microtubule properties, and found that it promotes both microtubule growth and shrinkage. Strikingly, APC-C accumulates at shrinking microtubule extremities, a common characteristic of depolymerases. Cryo-electron microscopy revealed that APC-C adopts an extended conformation along the protofilament crest and showed the presence of ring-like tubulin oligomers around the microtubule wall, which required the presence of two APC-C sub-domains. A mutant of APC-C that was incapable of decorating microtubules with ring-like tubulin oligomers exhibited a reduced effect on microtubule dynamics. Finally, whereas native APC-C rescued defective chromosome alignment in metaphase cells silenced for APC, the ring-incompetent mutant failed to correct mitotic defects. Thus, the bilateral interaction of APC-C with tubulin and microtubules likely contributes to its mitotic functions.
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