Annotations: 6HM5

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF00533	e6hm5A3	A: a/b three-layered sandwiches	X: BRCT domain (From Topology)	H: BRCT domain (From Topology)	T: BRCT domain	F: PF00533	ECOD (1.6)
A	PF12738	e6hm5A1	A: a/b three-layered sandwiches	X: BRCT domain (From Topology)	H: BRCT domain (From Topology)	T: BRCT domain	F: PF12738	ECOD (1.6)
A	PF21298	e6hm5A4	A: a/b three-layered sandwiches	X: BRCT domain (From Topology)	H: BRCT domain (From Topology)	T: BRCT domain	F: PF21298	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.10190	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	BRCT domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF21298	TopBP1, BRCT0 domain (TopBP1_BRCT0)	TopBP1, BRCT0 domain	TopBP1, also termed DNA topoisomerase II-beta-binding protein 1, functions in DNA replication and damage response. It binds double-stranded DNA breaks and nicks as well as single-stranded DNA [1-4]. It consists of multiple copies of BRCT domains, wit ...	TopBP1, also termed DNA topoisomerase II-beta-binding protein 1, functions in DNA replication and damage response. It binds double-stranded DNA breaks and nicks as well as single-stranded DNA [1-4]. It consists of multiple copies of BRCT domains, with a triple tandem BRCT domains at the N-terminal (designated BRCT0, BRCT1 and BRCT2), also observed in ECT2 that may represent a new type of consecutive BRCT domains [1-3]. This entry represents the first BRCT domain (BRCT0) of TopBP1 [1-4]. BRCT1/2 are included in Pfam:PF00533. Although ECT2 and TopBP1 share a similar cylinder-like crystal structure and distribution of secondary structure, some helices exhibit different orientations especially in the BRCT0 domain.	Domain
A	PF12738	twin BRCT domain (PTCB-BRCT)	twin BRCT domain	-	Family
A	PF00533	BRCA1 C Terminus (BRCT) domain (BRCT)	BRCA1 C Terminus (BRCT) domain	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B	Cell cycle checkpoint control protein RAD9A	double-stranded DNA 3'-5' DNA exonuclease activity DNA exonuclease activity catalytic activity, acting on a nucleic acid 3'-5' exonuclease activity double-stranded DNA exodeoxyribonuclease activity hydrolase activity DNA exonuclease activity, producing 5'-phosphomonoesters DNA nuclease activity exonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters catalytic activity, acting on DNA nuclease activity hydrolase activity, acting on ester bonds 3'-5'-DNA exonuclease activity catalytic activity double-stranded DNA 3'-5' DNA exonuclease activity DNA exonuclease activity catalytic activity, acting on a nucleic acid 3'-5' exonuclease activity double-stranded DNA exodeoxyribonuclease activity hydrolase activity DNA exonuclease activity, producing 5'-phosphomonoesters DNA nuclease activity exonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters catalytic activity, acting on DNA nuclease activity hydrolase activity, acting on ester bonds 3'-5'-DNA exonuclease activity catalytic activity exonuclease activity SH3 domain binding protein binding binding protein domain specific binding kinase binding enzyme binding protein kinase binding histone deacetylase binding	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process positive regulation of cell communication regulation of cellular process positive regulation of signal transduction signaling positive regulation of biological process regulation of cellular response to stress regulation of signal transduction regulation of intrinsic apoptotic signaling pathway in response to DNA damage cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process positive regulation of cell communication regulation of cellular process positive regulation of signal transduction signaling positive regulation of biological process regulation of cellular response to stress regulation of signal transduction regulation of intrinsic apoptotic signaling pathway in response to DNA damage regulation of programmed cell death regulation of intrinsic apoptotic signaling pathway intracellular signal transduction cell communication positive regulation of apoptotic signaling pathway positive regulation of response to stimulus regulation of intracellular signal transduction regulation of response to stress intrinsic apoptotic signaling pathway in response to DNA damage signal transduction intrinsic apoptotic signaling pathway positive regulation of cellular process regulation of biological process regulation of signaling positive regulation of intrinsic apoptotic signaling pathway in response to DNA damage positive regulation of programmed cell death regulation of apoptotic process biological regulation positive regulation of intracellular signal transduction cell death positive regulation of apoptotic process apoptotic signaling pathway regulation of response to stimulus regulation of cell communication positive regulation of intrinsic apoptotic signaling pathway apoptotic process programmed cell death regulation of apoptotic signaling pathway positive regulation of signaling primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process organic substance metabolic process metabolic process macromolecule metabolic process DNA repair regulation of cell cycle phase transition negative regulation of biological process negative regulation of cell cycle cell cycle phase transition negative regulation of cellular process negative regulation of cell cycle phase transition cell cycle DNA replication checkpoint signaling regulation of cell cycle cell cycle process regulation of cell cycle process DNA integrity checkpoint signaling negative regulation of cell cycle process cell cycle checkpoint signaling response to ionizing radiation cellular response to ionizing radiation response to radiation response to abiotic stimulus cellular response to radiation cellular response to abiotic stimulus cellular response to environmental stimulus DNA damage checkpoint signaling mitotic cell cycle negative regulation of mitotic cell cycle regulation of mitotic cell cycle mitotic DNA integrity checkpoint signaling mitotic DNA damage checkpoint signaling mitotic intra-S DNA damage checkpoint signaling mitotic cell cycle checkpoint signaling mitotic cell cycle process signal transduction in response to DNA damage	membrane-bounded organelle protein-containing complex intracellular anatomical structure condensed nuclear chromosome nucleus membrane-enclosed lumen nuclear protein-containing complex nuclear chromosome chromosome intracellular membrane-bounded organelle cellular anatomical entity intracellular organelle lumen intracellular organelle organelle lumen membrane-bounded organelle protein-containing complex intracellular anatomical structure condensed nuclear chromosome nucleus membrane-enclosed lumen nuclear protein-containing complex nuclear chromosome chromosome intracellular membrane-bounded organelle cellular anatomical entity intracellular organelle lumen intracellular organelle organelle lumen organelle intracellular non-membrane-bounded organelle checkpoint clamp complex condensed chromosome non-membrane-bounded organelle nuclear lumen cytoplasm nucleoplasm
A	DNA topoisomerase II binding protein 1	chromatin-protein adaptor activity protein-macromolecule adaptor activity molecular adaptor activity enzyme regulator activity protein serine/threonine kinase activator activity kinase activator activity enzyme activator activity molecular function activator activity molecular function regulator activity protein kinase activator activity protein kinase regulator activity kinase regulator activity identical protein binding protein binding chromatin-protein adaptor activity protein-macromolecule adaptor activity molecular adaptor activity enzyme regulator activity protein serine/threonine kinase activator activity kinase activator activity enzyme activator activity molecular function activator activity molecular function regulator activity protein kinase activator activity protein kinase regulator activity kinase regulator activity identical protein binding protein binding binding phosphorylation-dependent protein binding modification-dependent protein binding	cellular response to stimulus regulation of cellular process regulation of cell cycle phase transition response to stimulus signaling G2/M transition of mitotic cell cycle negative regulation of biological process negative regulation of cell cycle cell cycle phase transition intracellular signal transduction mitotic cell cycle negative regulation of mitotic cell cycle cell communication mitotic G2/M transition checkpoint regulation of mitotic cell cycle cellular response to stimulus regulation of cellular process regulation of cell cycle phase transition response to stimulus signaling G2/M transition of mitotic cell cycle negative regulation of biological process negative regulation of cell cycle cell cycle phase transition intracellular signal transduction mitotic cell cycle negative regulation of mitotic cell cycle cell communication mitotic G2/M transition checkpoint regulation of mitotic cell cycle mitotic DNA integrity checkpoint signaling negative regulation of cellular process negative regulation of cell cycle phase transition signal transduction cell cycle DNA replication checkpoint signaling regulation of cell cycle cell cycle process cell cycle G2/M phase transition regulation of biological process mitotic DNA replication checkpoint signaling negative regulation of mitotic cell cycle phase transition regulation of G2/M transition of mitotic cell cycle regulation of cell cycle process biological regulation DNA integrity checkpoint signaling regulation of cell cycle G2/M phase transition negative regulation of cell cycle process cell cycle checkpoint signaling regulation of mitotic cell cycle phase transition mitotic cell cycle checkpoint signaling mitotic cell cycle process negative regulation of cell cycle G2/M phase transition cellular process negative regulation of G2/M transition of mitotic cell cycle mitotic cell cycle phase transition DNA-templated DNA replication DNA replication initiation 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 double-strand break repair via classical nonhomologous end joining double-strand break repair double-strand break repair via nonhomologous end joining cellular response to stress DNA damage response response to stress DNA repair cellular component organization organelle organization chromosome organization cellular component organization or biogenesis protein localization localization cellular localization protein localization to chromosome protein localization to organelle cellular macromolecule localization macromolecule localization protein localization to site of double-strand break response to ionizing radiation response to radiation response to abiotic stimulus DNA damage checkpoint signaling mitotic G2 DNA damage checkpoint signaling mitotic DNA damage checkpoint signaling signal transduction in response to DNA damage DNA recombination recombinational repair double-strand break repair via homologous recombination double-strand break repair via alternative nonhomologous end joining	membrane-bounded organelle condensed nuclear chromosome intracellular anatomical structure nucleus membrane-enclosed lumen nuclear chromosome chromosome cellular anatomical entity intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle organelle lumen organelle intracellular non-membrane-bounded organelle membrane-bounded organelle condensed nuclear chromosome intracellular anatomical structure nucleus membrane-enclosed lumen nuclear chromosome chromosome cellular anatomical entity intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle organelle lumen organelle intracellular non-membrane-bounded organelle condensed chromosome non-membrane-bounded organelle nuclear lumen cytoskeleton actin cytoskeleton cell periphery plasma membrane membrane protein-containing complex BRCA1-B complex nuclear protein-containing complex male germ cell nucleus germ cell nucleus site of double-strand break site of DNA damage nuclear body nucleoplasm PML body

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B	IPR046938	DNA clamp superfamily	Homologous Superfamily
B	IPR026584	Rad9	Family
B	IPR007268	Rad9/Ddc1	Family
A	IPR001357	BRCT domain	Domain
A	IPR036420	BRCT domain superfamily	Homologous Superfamily
A	IPR049542	DNA topoisomerase 2-binding protein 1-like, BRCT0 domain	Domain
A	IPR035960	Secretoglobin superfamily	Homologous Superfamily
A	IPR044737	TopBP1, first BRCT domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B	Pharos: Q99638	Neoplasms, Second Primary malignant mesothelioma osteosarcoma

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
B	SEP	Parent Component: SER RESID: AA0037 PSI-MOD : O-phospho-L-serine MOD:00046

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.