5U1T | pdb_00005u1t

Crystal structure of the Saccharomyces cerevisiae separase-securin complex at 2.6 angstrom resolution

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Rad60-SLD	e5u1tA1	A: a/b three-layered sandwiches	X: Phosphorylase/hydrolase-like	H: Ribosomal protein S5 domain 2-like	T: Ribosomal protein S5 domain 2-like	F: Rad60-SLD	ECOD (v294.1)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B	PF04856	Securin sister-chromatid separation inhibitor (Securin)	Securin sister-chromatid separation inhibitor	-	Family
A	PF03568	Separin, protease domain (Separin_C)	Separin, protease domain	This entry represents the C-terminal caspase-like protease domain found in Separin. Separin is a cysteine protease critical for chromosome segregation during mitosis and meiosis, exhibits a conserved multi-domain architecture across eukaryotes. Separ ...	This entry represents the C-terminal caspase-like protease domain found in Separin. Separin is a cysteine protease critical for chromosome segregation during mitosis and meiosis, exhibits a conserved multi-domain architecture across eukaryotes. Separin contains an N-terminal HEAT/ARM repeats which allows the protein to bind regulatory partners like securin and cyclin B1; followed by a TPR-like domain which binds phosphorylated residues and a C-terminal caspase-like protease domain which contains a catalytic triad (Cys-His-Asp) and recognises substrates with a conserved arginine at the P1 position [1,3]. The C-terminal domain is structurally related to caspases but includes a unique substrate-binding subdomain (PPD) [2,4].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	Securin	protein binding binding enzyme binding	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process meiotic chromosome segregation regulation of cellular process regulation of cell cycle phase transition regulation of reproductive process positive regulation of meiotic chromosome separation regulation of metaphase/anaphase transition of meiotic cell cycle cell cycle chromosome segregation cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process meiotic chromosome segregation regulation of cellular process regulation of cell cycle phase transition regulation of reproductive process positive regulation of meiotic chromosome separation regulation of metaphase/anaphase transition of meiotic cell cycle cell cycle chromosome segregation regulation of biological process regulation of meiotic cell cycle regulation of cell cycle process positive regulation of meiotic cell cycle phase transition meiotic cell cycle sister chromatid segregation regulation of chromosome organization regulation of organelle organization regulation of chromosome separation regulation of chromosome segregation regulation of metaphase/anaphase transition of cell cycle regulation of cellular component organization sexual reproduction reproductive process positive regulation of biological process regulation of meiotic chromosome separation cell cycle phase transition positive regulation of metaphase/anaphase transition of meiotic cell cycle meiotic cell cycle process cellular component organization positive regulation of metaphase/anaphase transition of cell cycle positive regulation of cell cycle process meiotic nuclear division metaphase/anaphase transition of meiotic cell cycle cellular component organization or biogenesis regulation of cell cycle positive regulation of cellular process cell cycle process positive regulation of reproductive process meiotic chromosome separation organelle fission regulation of meiotic cell cycle phase transition biological regulation chromosome organization positive regulation of meiotic cell cycle positive regulation of cell cycle nuclear division organelle organization meiotic cell cycle phase transition chromosome separation regulation of sister chromatid segregation positive regulation of cell cycle phase transition nuclear chromosome segregation positive regulation of chromosome separation metaphase/anaphase transition of cell cycle cell division meiosis I meiosis I cell cycle process DNA recombination primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process recombinational repair metabolic process macromolecule metabolic process DNA repair mitotic nuclear division mitotic cell cycle mitotic cell cycle process mitotic sister chromatid segregation negative regulation of exit from mitosis negative regulation of biological process negative regulation of cell cycle exit from mitosis negative regulation of mitotic cell cycle regulation of mitotic cell cycle negative regulation of cellular process negative regulation of cell cycle phase transition negative regulation of mitotic cell cycle phase transition negative regulation of cell cycle process regulation of mitotic cell cycle phase transition regulation of exit from mitosis mitotic cell cycle phase transition localization macromolecule localization intracellular protein localization	protein-containing complex catalytic complex peptidase complex endopeptidase complex separase-securin complex intracellular organelle cellular anatomical structure intracellular anatomical structure cytoskeleton spindle organelle membraneless organelle intracellular membraneless organelle microtubule cytoskeleton protein-containing complex catalytic complex peptidase complex endopeptidase complex separase-securin complex intracellular organelle cellular anatomical structure intracellular anatomical structure cytoskeleton spindle organelle membraneless organelle intracellular membraneless organelle microtubule cytoskeleton cytoplasm membrane-bounded organelle nucleus intracellular membrane-bounded organelle
A	Separin	cysteine-type peptidase activity peptidase activity catalytic activity, acting on a protein cysteine-type endopeptidase activity hydrolase activity catalytic activity endopeptidase activity	meiotic chromosome segregation regulation of cellular process regulation of cell cycle phase transition regulation of reproductive process positive regulation of meiotic chromosome separation regulation of metaphase/anaphase transition of meiotic cell cycle cell cycle chromosome segregation regulation of biological process regulation of meiotic cell cycle regulation of cell cycle process positive regulation of meiotic cell cycle phase transition meiotic cell cycle sister chromatid segregation meiotic chromosome segregation regulation of cellular process regulation of cell cycle phase transition regulation of reproductive process positive regulation of meiotic chromosome separation regulation of metaphase/anaphase transition of meiotic cell cycle cell cycle chromosome segregation regulation of biological process regulation of meiotic cell cycle regulation of cell cycle process positive regulation of meiotic cell cycle phase transition meiotic cell cycle sister chromatid segregation regulation of chromosome organization regulation of organelle organization regulation of chromosome separation regulation of chromosome segregation regulation of metaphase/anaphase transition of cell cycle regulation of cellular component organization sexual reproduction reproductive process positive regulation of biological process regulation of meiotic chromosome separation cell cycle phase transition positive regulation of metaphase/anaphase transition of meiotic cell cycle meiotic cell cycle process cellular component organization positive regulation of metaphase/anaphase transition of cell cycle positive regulation of cell cycle process meiotic nuclear division metaphase/anaphase transition of meiotic cell cycle cellular component organization or biogenesis regulation of cell cycle positive regulation of cellular process cell cycle process positive regulation of reproductive process meiotic chromosome separation organelle fission regulation of meiotic cell cycle phase transition biological regulation chromosome organization positive regulation of meiotic cell cycle positive regulation of cell cycle nuclear division organelle organization meiotic cell cycle phase transition chromosome separation regulation of sister chromatid segregation positive regulation of cell cycle phase transition nuclear chromosome segregation positive regulation of chromosome separation cellular process metaphase/anaphase transition of cell cycle exit from mitosis mitotic cell cycle regulation of mitotic cell cycle positive regulation of mitotic cell cycle phase transition positive regulation of exit from mitosis positive regulation of mitotic cell cycle mitotic nuclear division regulation of mitotic cell cycle phase transition mitotic cell cycle process regulation of exit from mitosis mitotic cell cycle phase transition apoptotic process cell death programmed cell death meiosis II cell cycle process meiosis II mitotic spindle elongation spindle elongation microtubule cytoskeleton organization mitotic sister chromatid segregation regulation of spindle elongation microtubule cytoskeleton organization involved in mitosis spindle organization regulation of microtubule-based process mitotic spindle organization regulation of mitotic sister chromatid segregation regulation of mitotic spindle elongation microtubule-based process cytoskeleton organization proteolysis metabolic process primary metabolic process protein metabolic process macromolecule metabolic process regulation of localization regulation of protein localization negative regulation of biological process regulation of protein localization to nucleus negative regulation of protein localization to nucleolus protein localization to nucleus negative regulation of protein localization to nucleus localization protein localization to nucleolus protein localization to organelle macromolecule localization intracellular protein localization negative regulation of protein localization regulation of protein localization to nucleolus	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle protein-containing complex catalytic complex peptidase complex endopeptidase complex separase-securin complex cytoskeleton membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle protein-containing complex catalytic complex peptidase complex endopeptidase complex separase-securin complex cytoskeleton spindle membraneless organelle intracellular membraneless organelle microtubule cytoskeleton mitotic spindle microtubule organizing center spindle pole body mitotic spindle pole body nucleus

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR006940	Securin sister-chromatid separation inhibitor	Family
A	IPR005314	Peptidase C50, separase	Family
A	IPR030397	SEPARIN core 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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.

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