1GO4

Crystal structure of Mad1-Mad2 reveals a conserved Mad2 binding motif in Mad1 and Cdc20.

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1go4b_	Alpha and beta proteins (a+b)	The spindle assembly checkpoint protein mad2	The spindle assembly checkpoint protein mad2	The spindle assembly checkpoint protein mad2	The spindle assembly checkpoint protein mad2	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d1go4a_	Alpha and beta proteins (a+b)	The spindle assembly checkpoint protein mad2	The spindle assembly checkpoint protein mad2	The spindle assembly checkpoint protein mad2	The spindle assembly checkpoint protein mad2	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C	d1go4c_	Alpha and beta proteins (a+b)	The spindle assembly checkpoint protein mad2	The spindle assembly checkpoint protein mad2	The spindle assembly checkpoint protein mad2	The spindle assembly checkpoint protein mad2	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
D	d1go4d_	Alpha and beta proteins (a+b)	The spindle assembly checkpoint protein mad2	The spindle assembly checkpoint protein mad2	The spindle assembly checkpoint protein mad2	The spindle assembly checkpoint protein mad2	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E	d1go4e_	Coiled coil proteins	Parallel coiled-coil	Mitotic arrest deficient-like 1, Mad1	Mitotic arrest deficient-like 1, Mad1	Mitotic arrest deficient-like 1, Mad1	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
G	d1go4g_	Coiled coil proteins	Parallel coiled-coil	Mitotic arrest deficient-like 1, Mad1	Mitotic arrest deficient-like 1, Mad1	Mitotic arrest deficient-like 1, Mad1	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
F	d1go4f_	Coiled coil proteins	Parallel coiled-coil	Mitotic arrest deficient-like 1, Mad1	Mitotic arrest deficient-like 1, Mad1	Mitotic arrest deficient-like 1, Mad1	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
H	d1go4h_	Coiled coil proteins	Parallel coiled-coil	Mitotic arrest deficient-like 1, Mad1	Mitotic arrest deficient-like 1, Mad1	Mitotic arrest deficient-like 1, Mad1	Human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	HORMA/p31comet-like	8004003	3000150	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	HORMA/p31comet-like	8004003	3000150	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	HORMA/p31comet-like	8004003	3000150	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	HORMA/p31comet-like	8004003	3000150	SCOP2B (2022-06-29)
E	SCOP2 Family	Mitotic arrest deficient-like 1 Mad1	8026395	4002955	SCOP2 (2022-06-29)
E	SCOP2 Superfamily	Mitotic arrest deficient-like 1 Mad1	8038774	3001934	SCOP2 (2022-06-29)
G	SCOP2B Superfamily	Mitotic arrest deficient-like 1 Mad1	8038774	3001934	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Mitotic arrest deficient-like 1 Mad1	8038774	3001934	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	Mitotic arrest deficient-like 1 Mad1	8038774	3001934	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)
B	HORMA	e1go4B1	A: a+b two layers	X: The spindle assembly checkpoint protein mad2 (From Topology)	H: The spindle assembly checkpoint protein mad2 (From Topology)	T: The spindle assembly checkpoint protein mad2	F: HORMA	ECOD (1.6)
A	HORMA	e1go4A1	A: a+b two layers	X: The spindle assembly checkpoint protein mad2 (From Topology)	H: The spindle assembly checkpoint protein mad2 (From Topology)	T: The spindle assembly checkpoint protein mad2	F: HORMA	ECOD (1.6)
C	HORMA	e1go4C1	A: a+b two layers	X: The spindle assembly checkpoint protein mad2 (From Topology)	H: The spindle assembly checkpoint protein mad2 (From Topology)	T: The spindle assembly checkpoint protein mad2	F: HORMA	ECOD (1.6)
D	HORMA	e1go4D1	A: a+b two layers	X: The spindle assembly checkpoint protein mad2 (From Topology)	H: The spindle assembly checkpoint protein mad2 (From Topology)	T: The spindle assembly checkpoint protein mad2	F: HORMA	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.30.900.10	Alpha Beta	2-Layer Sandwich	Cell Cycle, Spindle Assembly Checkpoint Protein	Chain A	CATH (4.3.0)
A	3.30.900.10	Alpha Beta	2-Layer Sandwich	Cell Cycle, Spindle Assembly Checkpoint Protein	Chain A	CATH (4.3.0)
C	3.30.900.10	Alpha Beta	2-Layer Sandwich	Cell Cycle, Spindle Assembly Checkpoint Protein	Chain A	CATH (4.3.0)
D	3.30.900.10	Alpha Beta	2-Layer Sandwich	Cell Cycle, Spindle Assembly Checkpoint Protein	Chain A	CATH (4.3.0)
E	6.10.250.90	Special	Helix non-globular	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)
G	6.10.250.90	Special	Helix non-globular	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)
F	6.10.250.90	Special	Helix non-globular	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)
H	6.10.250.90	Special	Helix non-globular	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	PF02301	HORMA domain (HORMA)	HORMA domain	The HORMA (for Hop1p, Rev7p and MAD2) domain has been suggested to recognise chromatin states that result from DNA adducts, double stranded breaks or non-attachment to the spindle and acts as an adaptor that recruits other proteins. MAD2 is a spindle ...	The HORMA (for Hop1p, Rev7p and MAD2) domain has been suggested to recognise chromatin states that result from DNA adducts, double stranded breaks or non-attachment to the spindle and acts as an adaptor that recruits other proteins. MAD2 is a spindle checkpoint protein which prevents progression of the cell cycle upon detection of a defect in mitotic spindle integrity.	Domain
E, F, G, H	PF05557	Mitotic checkpoint protein (MAD)	Mitotic checkpoint protein	-	Coiled-coil

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	Mitotic spindle assembly checkpoint protein MAD2A	identical protein binding protein binding binding protein homodimerization activity protein dimerization activity	cellular process cell division regulation of biological process regulation of cellular process negative regulation of programmed cell death regulation of apoptotic process biological regulation negative regulation of biological process regulation of programmed cell death cell death negative regulation of apoptotic process negative regulation of cellular process apoptotic process programmed cell death cellular process cell division regulation of biological process regulation of cellular process negative regulation of programmed cell death regulation of apoptotic process biological regulation negative regulation of biological process regulation of programmed cell death cell death negative regulation of apoptotic process negative regulation of cellular process apoptotic process programmed cell death cellular response to stimulus positive regulation of cell communication regulation of cell cycle phase transition positive regulation of signal transduction response to stimulus positive regulation of cell cycle checkpoint spindle checkpoint signaling negative regulation of cell cycle regulation of signal transduction regulation of mitotic nuclear division intracellular signal transduction negative regulation of mitotic cell cycle cell communication regulation of cell cycle checkpoint negative regulation of mitotic sister chromatid segregation negative regulation of chromosome organization negative regulation of cell cycle phase transition mitotic spindle checkpoint signaling signal transduction cell cycle mitotic sister chromatid separation chromosome segregation negative regulation of sister chromatid segregation mitotic spindle assembly checkpoint signaling negative regulation of cellular component organization regulation of cell cycle process regulation of spindle checkpoint sister chromatid segregation positive regulation of intracellular signal transduction regulation of chromosome organization regulation of organelle organization regulation of mitotic cell cycle phase transition regulation of mitotic sister chromatid segregation mitotic cell cycle process regulation of response to stimulus positive regulation of mitotic cell cycle spindle assembly checkpoint regulation of chromosome separation negative regulation of mitotic nuclear division regulation of chromosome segregation regulation of cellular component organization regulation of mitotic sister chromatid separation regulation of metaphase/anaphase transition of cell cycle regulation of mitotic spindle checkpoint signaling regulation of mitotic cell cycle spindle assembly checkpoint spindle assembly checkpoint signaling positive regulation of biological process cell cycle phase transition regulation of mitotic metaphase/anaphase transition mitotic cell cycle cellular component organization positive regulation of response to stimulus regulation of mitotic cell cycle regulation of intracellular signal transduction mitotic sister chromatid segregation positive regulation of cell cycle process negative regulation of mitotic metaphase/anaphase transition cellular component organization or biogenesis regulation of cell cycle negative regulation of chromosome separation positive regulation of cellular process cell cycle process positive regulation of spindle checkpoint mitotic nuclear division regulation of signaling negative regulation of mitotic cell cycle phase transition organelle fission chromosome organization negative regulation of cell cycle process positive regulation of cell cycle cell cycle checkpoint signaling mitotic cell cycle checkpoint signaling organelle organization nuclear division negative regulation of chromosome segregation chromosome separation negative regulation of organelle organization negative regulation of nuclear division regulation of sister chromatid segregation negative regulation of mitotic sister chromatid separation regulation of nuclear division negative regulation of metaphase/anaphase transition of cell cycle nuclear chromosome segregation metaphase/anaphase transition of mitotic cell cycle regulation of cell communication metaphase/anaphase transition of cell cycle mitotic cell cycle phase transition positive regulation of signaling establishment of organelle localization cellular localization microtubule cytoskeleton organization spindle localization establishment or maintenance of cell polarity localization establishment of mitotic spindle localization establishment of spindle localization establishment of spindle orientation organelle localization establishment of localization in cell microtubule cytoskeleton organization involved in mitosis establishment of localization establishment of cell polarity establishment of mitotic spindle orientation microtubule-based process cytoskeleton organization catabolic process negative regulation of nitrogen compound metabolic process macromolecule catabolic process negative regulation of protein catabolic process regulation of primary metabolic process regulation of nitrogen compound metabolic process organic substance metabolic process nitrogen compound metabolic process protein metabolic process negative regulation of protein metabolic process negative regulation of macromolecule metabolic process organonitrogen compound catabolic process negative regulation of catabolic process organonitrogen compound metabolic process regulation of protein metabolic process negative regulation of metabolic process primary metabolic process protein catabolic process regulation of macromolecule metabolic process regulation of catabolic process metabolic process macromolecule metabolic process organic substance catabolic process regulation of metabolic process regulation of protein catabolic process negative regulation of post-translational protein modification negative regulation of ubiquitin protein ligase activity regulation of protein modification process regulation of catalytic activity regulation of protein ubiquitination negative regulation of catalytic activity regulation of transferase activity regulation of ubiquitin protein ligase activity negative regulation of ubiquitin-protein transferase activity protein ubiquitination negative regulation of transferase activity negative regulation of protein modification process regulation of ubiquitin-protein transferase activity negative regulation of protein ubiquitination regulation of protein modification by small protein conjugation or removal protein modification process negative regulation of protein modification by small protein conjugation or removal regulation of post-translational protein modification negative regulation of molecular function regulation of molecular function macromolecule modification post-translational protein modification protein modification by small protein conjugation protein modification by small protein conjugation or removal centrosome localization microtubule organizing center localization establishment of centrosome localization	intracellular organelle intracellular anatomical structure cytoskeleton spindle organelle intracellular non-membrane-bounded organelle spindle pole cellular anatomical entity microtubule cytoskeleton non-membrane-bounded organelle cytoplasm cytosol protein-containing complex mitotic spindle assembly checkpoint MAD1-MAD2 complex intracellular organelle intracellular anatomical structure cytoskeleton spindle organelle intracellular non-membrane-bounded organelle spindle pole cellular anatomical entity microtubule cytoskeleton non-membrane-bounded organelle cytoplasm cytosol protein-containing complex mitotic spindle assembly checkpoint MAD1-MAD2 complex mitotic spindle membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen nuclear protein-containing complex endomembrane system organelle envelope nuclear envelope nuclear pore nuclear basket nuclear pore chromosome chromosomal region kinetochore chromosome, centromeric region condensed chromosome, centromeric region supramolecular complex condensed chromosome perinuclear region of cytoplasm mitotic checkpoint complex
E, F, G, H	Mitotic spindle assembly checkpoint protein MAD1	identical protein binding protein binding binding kinetochore binding	cellular response to stimulus positive regulation of organelle organization negative regulation of spindle checkpoint response to stimulus spindle checkpoint signaling regulation of signal transduction regulation of mitotic nuclear division negative regulation of mitotic spindle assembly checkpoint signaling intracellular signal transduction negative regulation of mitotic cell cycle regulation of cell cycle checkpoint negative regulation of mitotic sister chromatid segregation negative regulation of chromosome organization positive regulation of mitotic metaphase/anaphase transition positive regulation of mitotic cell cycle phase transition cellular response to stimulus positive regulation of organelle organization negative regulation of spindle checkpoint response to stimulus spindle checkpoint signaling regulation of signal transduction regulation of mitotic nuclear division negative regulation of mitotic spindle assembly checkpoint signaling intracellular signal transduction negative regulation of mitotic cell cycle regulation of cell cycle checkpoint negative regulation of mitotic sister chromatid segregation negative regulation of chromosome organization positive regulation of mitotic metaphase/anaphase transition positive regulation of mitotic cell cycle phase transition negative regulation of cell cycle phase transition mitotic spindle checkpoint signaling mitotic sister chromatid separation negative regulation of sister chromatid segregation mitotic spindle assembly checkpoint signaling sister chromatid segregation regulation of mitotic sister chromatid segregation deactivation of mitotic spindle assembly checkpoint regulation of response to stimulus negative regulation of mitotic nuclear division regulation of chromosome segregation regulation of cellular component organization regulation of mitotic sister chromatid separation positive regulation of cellular component organization spindle assembly checkpoint signaling negative regulation of intracellular signal transduction regulation of mitotic metaphase/anaphase transition mitotic cell cycle regulation of mitotic cell cycle mitotic sister chromatid segregation positive regulation of metaphase/anaphase transition of cell cycle positive regulation of cell cycle process negative regulation of mitotic metaphase/anaphase transition positive regulation of mitotic cell cycle regulation of cell cycle negative regulation of chromosome separation positive regulation of cellular process cell cycle process mitotic nuclear division regulation of signaling chromosome organization negative regulation of signal transduction positive regulation of cell cycle cell cycle checkpoint signaling negative regulation of chromosome segregation chromosome separation negative regulation of nuclear division positive regulation of cell cycle phase transition negative regulation of metaphase/anaphase transition of cell cycle nuclear chromosome segregation regulation of cell communication cellular process regulation of cellular process regulation of cell cycle phase transition negative regulation of biological process negative regulation of cell cycle positive regulation of mitotic nuclear division cell communication signal transduction cell cycle chromosome segregation regulation of biological process negative regulation of cellular component organization regulation of cell cycle process regulation of spindle checkpoint positive regulation of nuclear division regulation of chromosome organization regulation of organelle organization regulation of mitotic cell cycle phase transition positive regulation of chromosome organization mitotic cell cycle process regulation of chromosome separation negative regulation of cell cycle checkpoint regulation of metaphase/anaphase transition of cell cycle regulation of mitotic spindle checkpoint signaling negative regulation of signaling regulation of mitotic cell cycle spindle assembly checkpoint positive regulation of biological process cell cycle phase transition negative regulation of cell communication cellular component organization regulation of intracellular signal transduction negative regulation of cellular process cellular component organization or biogenesis positive regulation of chromosome segregation negative regulation of mitotic cell cycle phase transition negative regulation of response to stimulus organelle fission biological regulation negative regulation of cell cycle process positive regulation of mitotic sister chromatid segregation mitotic cell cycle checkpoint signaling organelle organization nuclear division negative regulation of organelle organization regulation of sister chromatid segregation negative regulation of mitotic sister chromatid separation regulation of nuclear division positive regulation of mitotic sister chromatid separation metaphase/anaphase transition of mitotic cell cycle positive regulation of chromosome separation metaphase/anaphase transition of cell cycle mitotic cell cycle phase transition developmental process immune system development multicellular organismal process animal organ development gland development hematopoietic or lymphoid organ development multicellular organism development thymus development immune system process anatomical structure development system development establishment of organelle localization cellular localization mitotic metaphase chromosome alignment metaphase chromosome alignment localization chromosome localization organelle localization establishment of localization in cell attachment of spindle microtubules to kinetochore attachment of mitotic spindle microtubules to kinetochore establishment of localization establishment of chromosome localization cell division positive regulation of cell communication positive regulation of signal transduction positive regulation of cell cycle checkpoint positive regulation of intracellular signal transduction positive regulation of mitotic cell cycle spindle assembly checkpoint positive regulation of response to stimulus positive regulation of spindle checkpoint positive regulation of signaling negative regulation of lymphocyte proliferation regulation of leukocyte activation regulation of cell activation negative regulation of T cell proliferation negative regulation of cell adhesion negative regulation of leukocyte proliferation T cell activation lymphocyte proliferation regulation of immune system process regulation of leukocyte proliferation cell population proliferation negative regulation of T cell activation negative regulation of leukocyte cell-cell adhesion regulation of cell population proliferation mononuclear cell proliferation negative regulation of cell-cell adhesion regulation of leukocyte cell-cell adhesion negative regulation of multicellular organismal process negative regulation of leukocyte activation lymphocyte activation negative regulation of lymphocyte activation leukocyte proliferation leukocyte cell-cell adhesion leukocyte activation negative regulation of mononuclear cell proliferation cell adhesion cell-cell adhesion regulation of multicellular organismal process regulation of cell-cell adhesion T cell proliferation regulation of lymphocyte proliferation negative regulation of cell population proliferation regulation of cell adhesion cell activation regulation of T cell activation negative regulation of cell activation regulation of T cell proliferation negative regulation of immune system process regulation of mononuclear cell proliferation regulation of lymphocyte activation maintenance of protein location protein localization cellular macromolecule localization macromolecule localization cytoplasmic sequestering of protein maintenance of location regulation of localization regulation of metaphase plate congression	intracellular organelle intracellular anatomical structure cytoskeleton spindle organelle intracellular non-membrane-bounded organelle spindle pole cellular anatomical entity microtubule cytoskeleton non-membrane-bounded organelle chromosome chromosomal region kinetochore chromosome, centromeric region intracellular organelle intracellular anatomical structure cytoskeleton spindle organelle intracellular non-membrane-bounded organelle spindle pole cellular anatomical entity microtubule cytoskeleton non-membrane-bounded organelle chromosome chromosomal region kinetochore chromosome, centromeric region condensed chromosome, centromeric region supramolecular complex condensed chromosome membrane-bounded organelle organelle envelope nuclear envelope nucleus intracellular membrane-bounded organelle endomembrane system centrosome microtubule organizing center cytoplasm cytosol protein-containing complex mitotic spindle assembly checkpoint MAD1-MAD2 complex mitotic spindle MAD1 complex nuclear protein-containing complex nuclear pore nuclear basket nuclear pore

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR045091	Mad2-like	Family
A, B, C, D	IPR036570	HORMA domain superfamily	Homologous Superfamily
A, B, C, D	IPR003511	HORMA domain	Domain
E, F, G, H	IPR008672	Spindle assembly checkpoint component Mad1	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B, C, D	Pharos: Q13257	polycystic ovary syndrome esophageal squamous cell carcinoma malignant pancreatic neoplasm non-small cell lung carcinoma pancreatic intraductal papillary-mucinous neoplasm primitive neuroectodermal tumor Sjogren syndrome adrenal cortex carcinoma breast cancer ductal breast carcinoma in situ glioblastoma IgA glomerulonephritis lung adenocarcinoma malignant ependymoma medulloblastoma polycystic ovary syndrome esophageal squamous cell carcinoma malignant pancreatic neoplasm non-small cell lung carcinoma pancreatic intraductal papillary-mucinous neoplasm primitive neuroectodermal tumor Sjogren syndrome adrenal cortex carcinoma breast cancer ductal breast carcinoma in situ glioblastoma IgA glomerulonephritis lung adenocarcinoma malignant ependymoma medulloblastoma ovarian cancer pituitary cancer psoriasis atopic eczema breast carcinoma endometriosis heart disease invasive ductal breast carcinoma lung cancer malignant glioma nasopharyngeal carcinoma pancreatic intraductal papillary-mucinous carcinoma Sclerocystic Ovaries atypical teratoid rhabdoid tumor Crohn disease hepatocellular carcinoma large cell medulloblastoma malignant colon neoplasm
E, F, G, H	Pharos: Q9Y6D9	testicular germ cell tumor prostate cancer juvenile idiopathic arthritis Prostate cancer, familial schizophrenia attention deficit hyperactivity disorder, inattentive type endogenous depression heart disease malignant pancreatic neoplasm prostate adenocarcinoma prostate carcinoma testicular cancer autism spectrum disorder familial prostate carcinoma hereditary spastic paraplegia testicular germ cell tumor prostate cancer juvenile idiopathic arthritis Prostate cancer, familial schizophrenia attention deficit hyperactivity disorder, inattentive type endogenous depression heart disease malignant pancreatic neoplasm prostate adenocarcinoma prostate carcinoma testicular cancer autism spectrum disorder familial prostate carcinoma hereditary spastic paraplegia lymphoma pancreatic intraductal papillary-mucinous neoplasm bipolar I disorder gastroesophageal reflux disease idiopathic pulmonary fibrosis malignant mesothelioma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.