Annotations: 4NE3

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Core histone-like	8058042	3001387	SCOP2B (2022-06-29)
B	SCOP2 Family	Centromere protein X CENP-X-like	8044816	4004035	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Core histone-like	8053222	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	PF15630	e4ne3A1	A: alpha arrays	X: Histone-like	H: Histone-related	T: Histone	F: PF15630	ECOD (1.6)
B	PF09415	e4ne3B1	A: alpha arrays	X: Histone-like	H: Histone-related	T: Histone	F: PF09415	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.20.10	Mainly Alpha	Orthogonal Bundle	Histone, subunit A	Histone, subunit A	CATH (4.3.0)
B	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	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	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	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	Centromere protein S	DNA binding binding organic cyclic compound binding nucleic acid binding protein-containing complex binding chromatin binding protein heterodimerization activity protein binding protein dimerization activity	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process DNA-templated DNA replication DNA-templated DNA replication maintenance of fidelity primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process DNA replication cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process DNA-templated DNA replication DNA-templated DNA replication maintenance of fidelity primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process DNA replication organic substance metabolic process metabolic process macromolecule metabolic process replication fork processing 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 chromosome segregation interstrand cross-link repair regulation of protein modification process positive regulation of protein metabolic process positive regulation of biological process regulation of protein ubiquitination positive regulation of post-translational protein modification regulation of primary metabolic process positive regulation of metabolic process positive regulation of protein modification process protein ubiquitination positive regulation of macromolecule metabolic process protein metabolic process regulation of protein modification by small protein conjugation or removal protein modification process positive regulation of protein modification by small protein conjugation or removal positive regulation of protein ubiquitination regulation of biological process organonitrogen compound metabolic process regulation of post-translational protein modification regulation of protein metabolic process biological regulation regulation of macromolecule metabolic process macromolecule modification post-translational protein modification regulation of metabolic process protein modification by small protein conjugation protein modification by small protein conjugation or removal	membrane-bounded organelle intracellular organelle protein-containing complex intracellular anatomical structure organelle nucleus nuclear protein-containing complex intracellular membrane-bounded organelle cellular anatomical entity FANCM-MHF complex cytoplasm cytosol Fanconi anaemia nuclear complex chromosome membrane-bounded organelle intracellular organelle protein-containing complex intracellular anatomical structure organelle nucleus nuclear protein-containing complex intracellular membrane-bounded organelle cellular anatomical entity FANCM-MHF complex cytoplasm cytosol Fanconi anaemia nuclear complex chromosome chromosomal region kinetochore intracellular non-membrane-bounded organelle inner kinetochore chromosome, centromeric region condensed chromosome, centromeric region supramolecular complex condensed chromosome non-membrane-bounded organelle membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen protein-DNA complex chromatin
B	Centromere protein X	DNA binding binding organic cyclic compound binding nucleic acid binding	DNA-templated DNA replication DNA-templated DNA replication maintenance of fidelity primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process DNA replication organic substance metabolic process metabolic process macromolecule metabolic process replication fork processing organelle assembly protein-containing complex organization DNA-templated DNA replication DNA-templated DNA replication maintenance of fidelity primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process DNA replication organic substance metabolic process metabolic process macromolecule metabolic process replication fork processing 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 process 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 chromosome segregation cellular response to stimulus response to stimulus cellular response to stress DNA damage response response to stress interstrand cross-link repair DNA repair regulation of protein modification process positive regulation of protein metabolic process positive regulation of biological process regulation of protein ubiquitination positive regulation of post-translational protein modification regulation of primary metabolic process positive regulation of metabolic process positive regulation of protein modification process protein ubiquitination positive regulation of macromolecule metabolic process protein metabolic process regulation of protein modification by small protein conjugation or removal protein modification process positive regulation of protein modification by small protein conjugation or removal positive regulation of protein ubiquitination regulation of biological process organonitrogen compound metabolic process regulation of post-translational protein modification regulation of protein metabolic process biological regulation regulation of macromolecule metabolic process macromolecule modification post-translational protein modification regulation of metabolic process protein modification by small protein conjugation protein modification by small protein conjugation or removal	membrane-bounded organelle intracellular organelle protein-containing complex intracellular anatomical structure organelle nucleus nuclear protein-containing complex intracellular membrane-bounded organelle cellular anatomical entity FANCM-MHF complex cytoplasm cytosol Fanconi anaemia nuclear complex chromosome membrane-bounded organelle intracellular organelle protein-containing complex intracellular anatomical structure organelle nucleus nuclear protein-containing complex intracellular membrane-bounded organelle cellular anatomical entity FANCM-MHF complex cytoplasm cytosol Fanconi anaemia nuclear complex chromosome chromosomal region kinetochore intracellular non-membrane-bounded organelle inner kinetochore chromosome, centromeric region condensed chromosome, centromeric region supramolecular complex condensed chromosome non-membrane-bounded organelle membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen protein-DNA complex chromatin

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR009072	Histone-fold	Homologous Superfamily
A	IPR029003	CENP-S/Mhf1	Family
B	IPR018552	Centromere protein X	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q8N2Z9	breast carcinoma lung cancer osteosarcoma psoriasis estrogen-receptor negative breast cancer malignant ependymoma ovarian cancer invasive ductal breast carcinoma medulloblastoma prostate carcinoma
B	Pharos: A8MT69	attention deficit hyperactivity disorder, inattentive type lung adenocarcinoma tuberculosis breast cancer lung cancer invasive ductal breast carcinoma psoriasis

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 R01GM133198.