9N9F | pdb_00009n9f

Cryo-EM structure of the SAH domain of human INCENP bound to the paclitaxel-stabilized microtubule

PDB DOI: https://doi.org/10.2210/pdb9N9F/pdb
EM Map EMD-49167: EMDB EMDataResource

Classification: CELL CYCLE
Organism(s): Sus scrofa, Homo sapiens
Expression System: Homo sapiens
Mutation(s): Yes

Deposited: 2025-02-10 Released: 2026-02-04
Deposition Author(s): Funabiki, H., Niu, Y.
Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 2.91 Å
Aggregation State: FILAMENT
Reconstruction Method: SINGLE PARTICLE

Starting Models: experimental, other, integrative
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wwPDB Validation 3D Report Full Report

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

Literature

Cryo-EM structure of the human Hec1-Nuf2 dimer bound to the paclitaxel-stabilized microtubule

Funabiki, H., Niu, Y.

(2026) Sci Adv

Macromolecule Content

Total Structure Weight: 261.26 kDa
Atom Count: 10,723
Modeled Residue Count: 1,340
Deposited Residue Count: 2,288
Unique protein chains: 3

Macromolecules

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(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tubulin alpha-1B chain	A, C	451	Sus scrofa	Mutation(s): 0 EC: 3.6.5
UniProt
Find proteins for Q2XVP4 (Sus scrofa) Explore Q2XVP4 Go to UniProtKB: Q2XVP4
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	Q2XVP4
Sequence Annotations Expand
Reference Sequence

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Tubulin beta chain	B	445	Sus scrofa	Mutation(s): 0
UniProt
Find proteins for P02554 (Sus scrofa) Explore P02554 Go to UniProtKB: P02554
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P02554
Sequence Annotations Expand
Reference Sequence

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Inner centromere protein	D [auth S]	941	Homo sapiens	Mutation(s): 1 Gene Names: INCENP
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NQS7 (Homo sapiens) Explore Q9NQS7 Go to UniProtKB: Q9NQS7
PHAROS: Q9NQS7 GTEx: ENSG00000149503
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	Q9NQS7
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 5 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
TA1 Query on TA1 Download Ideal Coordinates CCD File SDF format, chain J [auth B] MOL2 format, chain J [auth B] mmCIF format, chain J [auth B]	J [auth B]	TAXOL C₄₇ H₅₁ N O₁₄ RCINICONZNJXQF-MZXODVADSA-N		Interactions Focus chain J [auth B] Interactions & Density Focus chain J [auth B]
GTP Query on GTP Download Ideal Coordinates CCD File SDF format, chain K [auth C] SDF format, chain E [auth A] MOL2 format, chain K [auth C] MOL2 format, chain E [auth A] mmCIF format, chain K [auth C] mmCIF format, chain E [auth A]	E [auth A], K [auth C]	GUANOSINE-5'-TRIPHOSPHATE C₁₀ H₁₆ N₅ O₁₄ P₃ XKMLYUALXHKNFT-UUOKFMHZSA-N		Interactions Focus chain E [auth A] Focus chain K [auth C] Interactions & Density Focus chain E [auth A] Focus chain K [auth C]
GDP Query on GDP Download Ideal Coordinates CCD File SDF format, chain H [auth B] MOL2 format, chain H [auth B] mmCIF format, chain H [auth B]	H [auth B]	GUANOSINE-5'-DIPHOSPHATE C₁₀ H₁₅ N₅ O₁₁ P₂ QGWNDRXFNXRZMB-UUOKFMHZSA-N		Interactions Focus chain H [auth B] Interactions & Density Focus chain H [auth B]
ZN Query on ZN Download Ideal Coordinates CCD File SDF format, chain F [auth A] SDF format, chain M [auth C] MOL2 format, chain F [auth A] MOL2 format, chain M [auth C] mmCIF format, chain F [auth A] mmCIF format, chain M [auth C]	F [auth A], M [auth C]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N		Interactions Focus chain F [auth A] Focus chain M [auth C] Interactions & Density Focus chain F [auth A] Focus chain M [auth C]
MG Query on MG Download Ideal Coordinates CCD File SDF format, chain G [auth B] SDF format, chain I [auth B] SDF format, chain L [auth C] MOL2 format, chain G [auth B] MOL2 format, chain I [auth B] MOL2 format, chain L [auth C] mmCIF format, chain G [auth B] mmCIF format, chain I [auth B] mmCIF format, chain L [auth C]	G [auth B], I [auth B], L [auth C]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N		Interactions Focus chain G [auth B] Focus chain I [auth B] Focus chain L [auth C] Interactions & Density Focus chain G [auth B] Focus chain I [auth B] Focus chain L [auth C]