5TD8 | pdb_00005td8

Crystal structure of an Extended Dwarf Ndc80 Complex

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D	SCOP2B Superfamily	RWD domain-like	8041316	3000774	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	RWD domain-like	8041319	3000774	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Calponin-homology domain, CH-domain	8053600	3000264	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Calponin-homology domain, CH-domain	8051981	3000264	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
E	V-set_12	e5td8E1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_12	ECOD (1.6)
D	Spindle_Spc25_like	e5td8D1	A: a+b two layers	X: Kinetochore globular domain-like (From Topology)	H: Kinetochore globular domain-like (From Topology)	T: Kinetochore globular domain-like	F: Spindle_Spc25_like	ECOD (1.6)
C	Spc24	e5td8C1	A: a+b two layers	X: Kinetochore globular domain-like (From Topology)	H: Kinetochore globular domain-like (From Topology)	T: Kinetochore globular domain-like	F: Spc24	ECOD (1.6)
B	Nuf2	e5td8B1	A: alpha bundles	X: CH domain-like	H: Calponin-homology domain-like (From Topology)	T: Calponin-homology domain-like	F: Nuf2	ECOD (1.6)
A	Ndc80_HEC	e5td8A2	A: alpha bundles	X: CH domain-like	H: Calponin-homology domain-like (From Topology)	T: Calponin-homology domain-like	F: Ndc80_HEC	ECOD (1.6)
A	KOG0995	e5td8A1	A: extended segments	X: Helical hairpin in Ndc80 (From Topology)	H: Helical hairpin in Ndc80 (From Topology)	T: Helical hairpin in Ndc80	F: KOG0995	ECOD (1.6)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
E	Heavy Chain	IGHV1	-	kinetochore protein spc24 \| kinetochore protein ndc80	SAbDab (2025-12-19)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C	PF08286	Spc24 subunit of Ndc80 (Spc24)	Spc24 subunit of Ndc80	-	Family
A	PF18077	Domain of unknown function (DUF5595) (DUF5595)	Domain of unknown function (DUF5595)	This domain is found in Nude C 80 (Ndc80) proteins which can be found in species such as Homo sapiens. Ndc80 protein complexes are a core component of the end-on attachment sites for kinetochore microtubules. Ndc80 is also known as Hec1, for highly e ...	This domain is found in Nude C 80 (Ndc80) proteins which can be found in species such as Homo sapiens. Ndc80 protein complexes are a core component of the end-on attachment sites for kinetochore microtubules. Ndc80 is also known as Hec1, for highly expressed in cancer 1 [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
E	nanobody	-	-	-
D	Kinetochore protein SPC25	-	localization centromere localization chromosome localization organelle localization centromere clustering macromolecule localization protein-containing complex localization cellular process cell division cell cycle chromosome segregation cell cycle process	Ndc80 complex protein-containing complex intracellular anatomical structure intracellular membraneless organelle chromosome chromosomal region kinetochore intracellular organelle cellular anatomical structure organelle membraneless organelle chromosome, centromeric region outer kinetochore condensed chromosome, centromeric region Ndc80 complex protein-containing complex intracellular anatomical structure intracellular membraneless organelle chromosome chromosomal region kinetochore intracellular organelle cellular anatomical structure organelle membraneless organelle chromosome, centromeric region outer kinetochore condensed chromosome, centromeric region supramolecular complex condensed chromosome membrane-bounded organelle nucleus intracellular membrane-bounded organelle
C	Kinetochore protein SPC24	identical protein binding protein binding binding	attachment of spindle microtubules to kinetochore sister chromatid biorientation chromosome organization sister chromatid segregation cellular component organization metaphase chromosome alignment localization organelle organization chromosome localization organelle localization nuclear chromosome segregation cellular process cellular component organization or biogenesis cell cycle attachment of spindle microtubules to kinetochore sister chromatid biorientation chromosome organization sister chromatid segregation cellular component organization metaphase chromosome alignment localization organelle organization chromosome localization organelle localization nuclear chromosome segregation cellular process cellular component organization or biogenesis cell cycle chromosome segregation cell cycle process centromere localization centromere clustering macromolecule localization protein-containing complex localization cell division	Ndc80 complex protein-containing complex intracellular anatomical structure intracellular membraneless organelle chromosome chromosomal region kinetochore intracellular organelle cellular anatomical structure organelle membraneless organelle chromosome, centromeric region outer kinetochore condensed chromosome, centromeric region Ndc80 complex protein-containing complex intracellular anatomical structure intracellular membraneless organelle chromosome chromosomal region kinetochore intracellular organelle cellular anatomical structure organelle membraneless organelle chromosome, centromeric region outer kinetochore condensed chromosome, centromeric region supramolecular complex condensed chromosome membrane-bounded organelle nucleus intracellular membrane-bounded organelle
B	Kinetochore protein NUF2	protein-containing complex binding binding	mitotic metaphase chromosome alignment mitotic cell cycle metaphase chromosome alignment cellular component organization localization chromosome localization organelle localization mitotic sister chromatid segregation cell cycle cellular component organization or biogenesis chromosome segregation cell cycle process mitotic nuclear division attachment of spindle microtubules to kinetochore mitotic metaphase chromosome alignment mitotic cell cycle metaphase chromosome alignment cellular component organization localization chromosome localization organelle localization mitotic sister chromatid segregation cell cycle cellular component organization or biogenesis chromosome segregation cell cycle process mitotic nuclear division attachment of spindle microtubules to kinetochore organelle fission attachment of mitotic spindle microtubules to kinetochore chromosome organization sister chromatid segregation organelle organization nuclear division mitotic cell cycle process nuclear chromosome segregation cellular process cell division microtubule cytoskeleton organization mitotic spindle organization microtubule-based process cytoskeleton organization microtubule cytoskeleton organization involved in mitosis spindle organization meiotic chromosome segregation sexual reproduction reproductive process meiotic cell cycle meiotic cell cycle process meiotic nuclear division kinetochore organization	intracellular anatomical structure intracellular membraneless organelle chromosome chromosomal region kinetochore intracellular organelle cellular anatomical structure organelle membraneless organelle chromosome, centromeric region condensed chromosome, centromeric region supramolecular complex condensed chromosome microtubule organizing center intracellular anatomical structure intracellular membraneless organelle chromosome chromosomal region kinetochore intracellular organelle cellular anatomical structure organelle membraneless organelle chromosome, centromeric region condensed chromosome, centromeric region supramolecular complex condensed chromosome microtubule organizing center cytoskeleton spindle pole body microtubule cytoskeleton Ndc80 complex protein-containing complex outer kinetochore polymeric cytoskeletal fiber spindle spindle microtubule supramolecular fiber microtubule supramolecular polymer membrane-bounded organelle nucleus intracellular membrane-bounded organelle
A	Kinetochore protein NDC80	identical protein binding protein binding binding	localization protein localization to kinetochore protein localization to chromosome protein localization to chromosome, centromeric region protein localization to condensed chromosome protein localization to organelle macromolecule localization intracellular protein localization mitotic metaphase chromosome alignment mitotic cell cycle metaphase chromosome alignment cellular component organization chromosome localization organelle localization localization protein localization to kinetochore protein localization to chromosome protein localization to chromosome, centromeric region protein localization to condensed chromosome protein localization to organelle macromolecule localization intracellular protein localization mitotic metaphase chromosome alignment mitotic cell cycle metaphase chromosome alignment cellular component organization chromosome localization organelle localization mitotic sister chromatid segregation cell cycle cellular component organization or biogenesis chromosome segregation cell cycle process mitotic nuclear division attachment of spindle microtubules to kinetochore organelle fission attachment of mitotic spindle microtubules to kinetochore chromosome organization sister chromatid segregation organelle organization nuclear division mitotic cell cycle process nuclear chromosome segregation cellular process cell division sister chromatid biorientation mitotic sister chromatid biorientation	intracellular anatomical structure intracellular membraneless organelle chromosome chromosomal region kinetochore intracellular organelle cellular anatomical structure organelle membraneless organelle chromosome, centromeric region condensed chromosome, centromeric region supramolecular complex condensed chromosome Ndc80 complex intracellular anatomical structure intracellular membraneless organelle chromosome chromosomal region kinetochore intracellular organelle cellular anatomical structure organelle membraneless organelle chromosome, centromeric region condensed chromosome, centromeric region supramolecular complex condensed chromosome Ndc80 complex protein-containing complex outer kinetochore membrane-bounded organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
D	IPR038066	Spc24, Fungi, globular domain superfamily	Homologous Superfamily
C	IPR013252	Kinetochore-Ndc80 subunit Spc24	Family
C	IPR038066	Spc24, Fungi, globular domain superfamily	Homologous Superfamily
B	IPR038275	Nuf2, N-terminal domain superfamily	Homologous Superfamily
B	IPR005549	Kinetochore protein Nuf2, N-terminal	Domain
A	IPR040967	Domain of unknown function DUF5595	Domain
A	IPR038273	Ndc80 domain superfamily	Homologous Superfamily
A	IPR005550	Kinetochore protein Ndc80	Family
A	IPR055260	Kinetochore protein Ndc80, CH domain	Domain

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.