8RC1 image
Deposition Date 2023-12-05
Release Date 2024-03-13
Last Version Date 2024-03-13
Entry Detail
PDB ID:
8RC1
Title:
MAP7 MTBD (microtubule binding domain) decorated microtubule protofilament
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Sus scrofa (Taxon ID: 9823)
Host Organism:
Method Details:
Experimental Method:
Resolution:
3.70 Å
Aggregation State:
FILAMENT
Reconstruction Method:
SINGLE PARTICLE
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Tubulin alpha-1B chain
Gene (Uniprot):TUBA1B
Chain IDs:A, C
Chain Length:451
Number of Molecules:2
Biological Source:Sus scrofa
Polymer Type:polypeptide(L)
Molecule:Tubulin beta chain
Chain IDs:B, D
Chain Length:430
Number of Molecules:2
Biological Source:Sus scrofa
Polymer Type:polypeptide(L)
Molecule:Microtubule associated protein 7 (MAP7)
Chain IDs:E
Chain Length:89
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
A structural and dynamic visualization of the interaction between MAP7 and microtubules.
Nat Commun 15 1948 1948 (2024)
PMID: 38431715 DOI: 10.1038/s41467-024-46260-5

Abstact

Microtubules (MTs) are key components of the eukaryotic cytoskeleton and are essential for intracellular organization, organelle trafficking and mitosis. MT tasks depend on binding and interactions with MT-associated proteins (MAPs). MT-associated protein 7 (MAP7) has the unusual ability of both MT binding and activating kinesin-1-mediated cargo transport along MTs. Additionally, the protein is reported to stabilize MTs with its 112 amino-acid long MT-binding domain (MTBD). Here we investigate the structural basis of the interaction of MAP7 MTBD with the MT lattice. Using a combination of solid and solution-state nuclear magnetic resonance (NMR) spectroscopy with electron microscopy, fluorescence anisotropy and isothermal titration calorimetry, we shed light on the binding mode of MAP7 to MTs at an atomic level. Our results show that a combination of interactions between MAP7 and MT lattice extending beyond a single tubulin dimer and including tubulin C-terminal tails contribute to formation of the MAP7-MT complex.

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Primary Citation of related structures