9COC | pdb_00009coc

Two protofilament structure of alpha1B and betaI/IVb microtubule bound to GDP

PDB DOI: https://doi.org/10.2210/pdb9COC/pdb
EM Map EMD-45775: EMDB EMDataResource

Classification: STRUCTURAL PROTEIN
Organism(s): Homo sapiens
Mutation(s): No

Deposited: 2024-07-16 Released: 2026-03-18
Deposition Author(s): Zehr, E.A., Roll-Mecak, A.
Funding Organization(s): National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 2.90 Å
Aggregation State: FILAMENT
Reconstruction Method: SINGLE PARTICLE

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

This is version 1.0 of the entry. See complete history.

Literature

Cryo-EM structures of human alpha1B/betaI+betaIVb microtubules shed light on isoform specific assembly

Zehr, E.A., Roll-Mecak, A.

(2023) bioRxiv

DOI: https://doi.org/10.1101/2023.12.01.569594

Macromolecule Content

Total Structure Weight: 403.65 kDa
Atom Count: 27,150
Modeled Residue Count: 3,462
Deposited Residue Count: 3,580
Unique protein chains: 2

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tubulin beta chain	A [auth B], B [auth E], C [auth F], D [auth K]	444	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P07437 (Homo sapiens) Explore P07437 Go to UniProtKB: P07437
PHAROS: P07437 GTEx: ENSG00000196230
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P07437
Sequence Annotations Expand
Reference Sequence

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| 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Tubulin alpha-1B chain	E [auth A], F [auth D], G [auth C], H [auth I]	451	Homo sapiens	Mutation(s): 0 EC: 3.6.5
UniProt & NIH Common Fund Data Resources
Find proteins for P68363 (Homo sapiens) Explore P68363 Go to UniProtKB: P68363
PHAROS: P68363 GTEx: ENSG00000123416
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P68363
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
GTP Query on GTP Download:Ideal Coordinates CCD File SDF format, chain S [auth I] SDF format, chain Q [auth C] SDF format, chain O [auth D] SDF format, chain M [auth A] MOL2 format, chain S [auth I] MOL2 format, chain Q [auth C] MOL2 format, chain O [auth D] MOL2 format, chain M [auth A] mmCIF format, chain S [auth I] mmCIF format, chain Q [auth C] mmCIF format, chain O [auth D] mmCIF format, chain M [auth A]	M [auth A], O [auth D], Q [auth C], S [auth I]	GUANOSINE-5'-TRIPHOSPHATE C₁₀ H₁₆ N₅ O₁₄ P₃ XKMLYUALXHKNFT-UUOKFMHZSA-N		Interactions Focus chain M [auth A] Focus chain O [auth D] Focus chain Q [auth C] Focus chain S [auth I] Interactions & Density Focus chain M [auth A] Focus chain O [auth D] Focus chain Q [auth C] Focus chain S [auth I]
GDP (Subject of Investigation/LOI) Query on GDP Download:Ideal Coordinates CCD File SDF format, chain L [auth K] SDF format, chain K [auth F] SDF format, chain J [auth E] SDF format, chain I [auth B] MOL2 format, chain L [auth K] MOL2 format, chain K [auth F] MOL2 format, chain J [auth E] MOL2 format, chain I [auth B] mmCIF format, chain L [auth K] mmCIF format, chain K [auth F] mmCIF format, chain J [auth E] mmCIF format, chain I [auth B]	I [auth B], J [auth E], K [auth F], L [auth K]	GUANOSINE-5'-DIPHOSPHATE C₁₀ H₁₅ N₅ O₁₁ P₂ QGWNDRXFNXRZMB-UUOKFMHZSA-N		Interactions Focus chain I [auth B] Focus chain J [auth E] Focus chain K [auth F] Focus chain L [auth K] Interactions & Density Focus chain I [auth B] Focus chain J [auth E] Focus chain K [auth F] Focus chain L [auth K]
MG Query on MG Download:Ideal Coordinates CCD File SDF format, chain T [auth I] SDF format, chain R [auth C] SDF format, chain P [auth D] SDF format, chain N [auth A] MOL2 format, chain T [auth I] MOL2 format, chain R [auth C] MOL2 format, chain P [auth D] MOL2 format, chain N [auth A] mmCIF format, chain T [auth I] mmCIF format, chain R [auth C] mmCIF format, chain P [auth D] mmCIF format, chain N [auth A]	N [auth A], P [auth D], R [auth C], T [auth I]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N		Interactions Focus chain N [auth A] Focus chain P [auth D] Focus chain R [auth C] Focus chain T [auth I] Interactions & Density Focus chain N [auth A] Focus chain P [auth D] Focus chain R [auth C] Focus chain T [auth I]