Annotations: 2O3C

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2o3ca_	Alpha and beta proteins (a+b)	DNase I-like	DNase I-like	DNase I-like	automated matches	zebrafish (Danio rerio ) [TaxId: 7955 ],	SCOPe (2.08)
B	d2o3cb1	Alpha and beta proteins (a+b)	DNase I-like	DNase I-like	DNase I-like	automated matches	zebrafish (Danio rerio ) [TaxId: 7955 ],	SCOPe (2.08)
B	d2o3cb2	Artifacts	Tags	Tags	Tags	N-terminal Tags	zebrafish (Danio rerio ) [TaxId: 7955 ],	SCOPe (2.08)
C	d2o3cc_	Alpha and beta proteins (a+b)	DNase I-like	DNase I-like	DNase I-like	automated matches	zebrafish (Danio rerio ) [TaxId: 7955 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	DNase I-like	8061484	4002213	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	DNase I-like	8061485	3000957	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	DNase I-like	8061485	3000957	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	DNase I-like	8061485	3000957	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)
A	Exo_endo_phos	e2o3cA1	A: a+b four layers	X: Carbon-nitrogen hydrolase-like	H: DNase I-like (From Topology)	T: DNase I-like	F: Exo_endo_phos	ECOD (1.6)
B	Exo_endo_phos	e2o3cB1	A: a+b four layers	X: Carbon-nitrogen hydrolase-like	H: DNase I-like (From Topology)	T: DNase I-like	F: Exo_endo_phos	ECOD (1.6)
C	Exo_endo_phos	e2o3cC1	A: a+b four layers	X: Carbon-nitrogen hydrolase-like	H: DNase I-like (From Topology)	T: DNase I-like	F: Exo_endo_phos	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.60.10.10	Alpha Beta	4-Layer Sandwich	Deoxyribonuclease I	Chain A	CATH (4.3.0)
B	3.60.10.10	Alpha Beta	4-Layer Sandwich	Deoxyribonuclease I	Chain A	CATH (4.3.0)
C	3.60.10.10	Alpha Beta	4-Layer Sandwich	Deoxyribonuclease I	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C	PF03372	Endonuclease/Exonuclease/phosphatase family (Exo_endo_phos)	Endonuclease/Exonuclease/phosphatase family	This large family of proteins includes magnesium dependent endonucleases and a large number of phosphatases involved in intracellular signalling [1]. This family includes: AP endonuclease proteins EC:4.2.99.18 e.g Swiss:P27695, DNase I proteins EC:3. ...	This large family of proteins includes magnesium dependent endonucleases and a large number of phosphatases involved in intracellular signalling [1]. This family includes: AP endonuclease proteins EC:4.2.99.18 e.g Swiss:P27695, DNase I proteins EC:3.1.21.1 e.g. Swiss:P24855, Synaptojanin an inositol-1,4,5-trisphosphate phosphatase EC:3.1.3.56 Swiss:O43426, Sphingomyelinase EC:3.1.4.12 Swiss:P11889 and Nocturnin Swiss:O35710.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C	APEX nuclease 1	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 DNA-(apurinic or apyrimidinic site) endonuclease activity endonuclease activity endodeoxyribonuclease activity, producing 5'-phosphomonoesters DNA endonuclease activity endonuclease activity, active with either ribo- or deoxyribonucleic acids and producing 5'-phosphomonoesters class II DNA-(apurinic or apyrimidinic site) endonuclease activity phosphoric ester hydrolase activity phosphoric diester hydrolase activity DNA binding binding organic cyclic compound binding damaged DNA binding DNA-(abasic site) binding nucleic acid binding RNA binding cation binding ion binding metal ion binding small molecule binding	heart process multicellular organismal process system process circulatory system process heart contraction blood circulation cellular response to stimulus response to stimulus primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process base-excision repair heart process multicellular organismal process system process circulatory system process heart contraction blood circulation cellular response to stimulus response to stimulus primary metabolic process DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process organic cyclic compound metabolic process base-excision repair organic substance metabolic process cellular response to stress DNA damage response response to stress metabolic process cellular process macromolecule metabolic process DNA repair 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 biosynthetic process positive regulation of biological process positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process positive regulation of metabolic process positive regulation of biosynthetic process organic substance biosynthetic process positive regulation of macromolecule metabolic process positive regulation of cellular process regulation of biosynthetic process cellular metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of cellular biosynthetic process regulation of gene expression biosynthetic process positive regulation of gene expression regulation of macromolecule biosynthetic process regulation of metabolic process positive regulation of cellular biosynthetic process DNA modification DNA demethylation DNA dealkylation macromolecule modification demethylation heart morphogenesis pattern specification process embryo development embryonic heart tube development multicellular organism development tube morphogenesis embryonic heart tube morphogenesis heart looping determination of bilateral symmetry anatomical structure development animal organ morphogenesis epithelial tube morphogenesis embryonic organ development determination of left/right symmetry system development specification of symmetry developmental process embryonic organ morphogenesis heart development epithelium development tube development animal organ development embryonic morphogenesis morphogenesis of an epithelium determination of heart left/right asymmetry tissue development regionalization circulatory system development anatomical structure morphogenesis tissue morphogenesis left/right pattern formation	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle nucleus membrane-enclosed lumen nucleolus intracellular organelle lumen organelle lumen intracellular non-membrane-bounded organelle membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle nucleus membrane-enclosed lumen nucleolus intracellular organelle lumen organelle lumen intracellular non-membrane-bounded organelle nuclear lumen non-membrane-bounded organelle nuclear speck nuclear body nucleoplasm endoplasmic reticulum endomembrane system

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR005135	Endonuclease/exonuclease/phosphatase	Domain
A, B, C	IPR020848	AP endonuclease 1, conserved site	Conserved Site
A, B, C	IPR004808	AP endonuclease 1	Family
A, B, C	IPR036691	Endonuclease/exonuclease/phosphatase superfamily	Homologous Superfamily
A, B, C	IPR020847	AP endonuclease 1, binding site	Binding Site

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.