3B0B

Crystal structure of the chicken CENP-S/CENP-X complex

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
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)
A [auth B]	SCOP2B Superfamily	Core histone-like	8053231	3001387	SCOP2B (2022-06-29)
C [auth A]	SCOP2 Family	Kinetochore component CENP-S -like	8051473	4004034	SCOP2 (2022-06-29)
C [auth A]	SCOP2 Superfamily	Core histone-like	8053231	3001387	SCOP2 (2022-06-29)
D	SCOP2B Superfamily	Core histone-like	8053230	3001387	SCOP2B (2022-06-29)
B [auth C]	SCOP2 Family	Centromere protein X, CENP-X-like	8044818	4004035	SCOP2 (2022-06-29)
B [auth C]	SCOP2 Superfamily	Core histone-like	8053230	3001387	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth B]	CENP-S	e3b0bB1	A: alpha arrays	X: Histone-like	H: Histone-related	T: Histone	F: CENP-S	ECOD (1.6)
C [auth A]	CENP-S	e3b0bA1	A: alpha arrays	X: Histone-like	H: Histone-related	T: Histone	F: CENP-S	ECOD (1.6)
D	CENP-X	e3b0bD2	A: alpha arrays	X: Histone-like	H: Histone-related	T: Histone	F: CENP-X	ECOD (1.6)
B [auth C]	CENP-X	e3b0bC1	A: alpha arrays	X: Histone-like	H: Histone-related	T: Histone	F: CENP-X	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A [auth B]	1.10.20.10	Mainly Alpha	Orthogonal Bundle	Histone, subunit A	Histone, subunit A	CATH (4.3.0)
C [auth A]	1.10.20.10	Mainly Alpha	Orthogonal Bundle	Histone, subunit A	Histone, subunit A	CATH (4.3.0)
D	1.20.5.4980	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)
B [auth C]	1.20.5.4980	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)
B [auth C]	6.10.130.30	Special	Helix non-globular	GTP Cyclohydrolase I	Chain A, domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], C [auth A]	PF15630	CENP-S protein (CENP-S)	CENP-S protein	CENP-S is a family of vertebral and fungal kinetochore component proteins. CENP-S complexes with CENP-X to form a stable CENP-T-W-S-X heterotetramer.	Domain
B [auth C], D	PF09415	CENP-S associating Centromere protein X (CENP-X)	CENP-S associating Centromere protein X	The centromere, essential for faithful chromosome segregation during mitosis, has a network of constitutive centromere-associated (CCAN) proteins associating with it during mitosis. So far in vertebrates at least 15 centromere proteins have been iden ...	The centromere, essential for faithful chromosome segregation during mitosis, has a network of constitutive centromere-associated (CCAN) proteins associating with it during mitosis. So far in vertebrates at least 15 centromere proteins have been identified, which are divided into several subclasses based on functional and biochemical analyses. These provide a platform for the formation of a functional kinetochore during mitosis. CENP-S is one that does not associate with the CENP-H-containing complex but rather interacts with CENP-X to form a stable assembly of outer kinetochore proteins that functions downstream of other components of the CCAN. This complex may directly allow efficient and stable formation of the outer kinetochore on the CCAN platform.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B], C [auth A]	Centromere protein S	DNA binding binding organic cyclic compound binding nucleic acid binding chromatin binding protein heterodimerization activity protein binding protein dimerization activity	nucleobase-containing compound metabolic process DNA-templated DNA replication DNA replication DNA-templated DNA replication maintenance of fidelity metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process replication fork processing nucleic acid metabolic process cellular response to stimulus response to stimulus cellular response to stress DNA damage response nucleobase-containing compound metabolic process DNA-templated DNA replication DNA replication DNA-templated DNA replication maintenance of fidelity metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process replication fork processing nucleic acid metabolic process cellular response to stimulus response to stimulus cellular response to stress DNA damage response response to stress cellular process DNA repair cell division sexual reproduction homologous recombination reproductive process resolution of meiotic recombination intermediates meiotic cell cycle process cellular component organization meiosis I meiotic nuclear division cell cycle cellular component organization or biogenesis reciprocal homologous recombination cell cycle process meiotic cell cycle DNA recombination organelle fission reciprocal meiotic recombination nuclear division organelle organization meiosis I cell cycle process	intracellular anatomical structure chromosome cellular anatomical entity chromosomal region kinetochore intracellular organelle organelle intracellular non-membrane-bounded organelle chromosome, centromeric region condensed chromosome, centromeric region supramolecular complex condensed chromosome non-membrane-bounded organelle membrane-bounded organelle intracellular anatomical structure chromosome cellular anatomical entity chromosomal region kinetochore intracellular organelle organelle intracellular non-membrane-bounded organelle chromosome, centromeric region condensed chromosome, centromeric region supramolecular complex condensed chromosome non-membrane-bounded organelle membrane-bounded organelle protein-containing complex nucleus nuclear protein-containing complex intracellular membrane-bounded organelle FANCM-MHF complex
B [auth C], D	Centromere protein X	DNA binding binding organic cyclic compound binding nucleic acid binding protein heterodimerization activity protein binding protein dimerization activity	nucleobase-containing compound metabolic process DNA-templated DNA replication DNA replication DNA-templated DNA replication maintenance of fidelity metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process replication fork processing nucleic acid metabolic process cellular response to stimulus response to stimulus cellular response to stress DNA damage response nucleobase-containing compound metabolic process DNA-templated DNA replication DNA replication DNA-templated DNA replication maintenance of fidelity metabolic process primary metabolic process DNA metabolic process macromolecule metabolic process replication fork processing nucleic acid metabolic process cellular response to stimulus response to stimulus cellular response to stress DNA damage response response to stress cellular process DNA repair organelle assembly protein-containing complex organization non-membrane-bounded organelle assembly chromosome organization protein-DNA complex assembly cellular component organization cellular component biogenesis protein-DNA complex organization organelle organization cellular component assembly kinetochore assembly protein-containing complex assembly kinetochore organization cellular component organization or biogenesis centromere complex assembly cell division sexual reproduction homologous recombination reproductive process resolution of meiotic recombination intermediates meiotic cell cycle process meiosis I meiotic nuclear division cell cycle reciprocal homologous recombination cell cycle process meiotic cell cycle DNA recombination organelle fission reciprocal meiotic recombination nuclear division meiosis I cell cycle process	membrane-bounded organelle Fanconi anaemia nuclear complex intracellular organelle protein-containing complex intracellular anatomical structure organelle nucleus nuclear protein-containing complex intracellular membrane-bounded organelle cellular anatomical entity chromosome chromosomal region kinetochore intracellular non-membrane-bounded organelle membrane-bounded organelle Fanconi anaemia nuclear complex intracellular organelle protein-containing complex intracellular anatomical structure organelle nucleus nuclear protein-containing complex intracellular membrane-bounded organelle cellular anatomical entity chromosome chromosomal region kinetochore intracellular non-membrane-bounded organelle chromosome, centromeric region condensed chromosome, centromeric region supramolecular complex condensed chromosome non-membrane-bounded organelle FANCM-MHF complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B], C [auth A]	IPR009072	Histone-fold	Homologous Superfamily
A [auth B], C [auth A]	IPR029003	CENP-S/Mhf1	Family
B [auth C], D	IPR009072	Histone-fold	Homologous Superfamily
B [auth C], D	IPR018552	Centromere protein X	Family

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.