Annotations: 1IYR

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1iyra_	All alpha proteins	C-terminal domain of DFF45/ICAD (DFF-C domain)	C-terminal domain of DFF45/ICAD (DFF-C domain)	C-terminal domain of DFF45/ICAD (DFF-C domain)	C-terminal domain of DFF45/ICAD (DFF-C domain)	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)
A	SCOP2 Family	C-terminal domain of DFF45/ICAD (DFF-C domain)	8030236	4002364	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	C-terminal domain of DFF45/ICAD (DFF-C domain)	8042615	3001144	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	DFF-C	e1iyrA1	A: alpha arrays	X: HTH	H: C-terminal domain of DFF45/ICAD (From Topology)	T: C-terminal domain of DFF45/ICAD	F: DFF-C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.1490.10	Mainly Alpha	Orthogonal Bundle	Dna Fragmentation Factor Alpha Subunit	Chain: A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF09033	DNA Fragmentation factor 45kDa, C terminal domain (DFF-C)	DNA Fragmentation factor 45kDa, C terminal domain	The C terminal domain of DNA Fragmentation factor 45kDa (DFF-C) consists of four alpha-helices, which are folded in a helix-packing arrangement, with alpha-2 and alpha-3 packing against a long C-terminal helix (alpha-4). The main function of this dom ...	The C terminal domain of DNA Fragmentation factor 45kDa (DFF-C) consists of four alpha-helices, which are folded in a helix-packing arrangement, with alpha-2 and alpha-3 packing against a long C-terminal helix (alpha-4). The main function of this domain is the inhibition of DFF40 by binding to its C-terminal catalytic domain through ionic interactions, thereby inhibiting the fragmentation of DNA in the apoptotic process. In addition to blocking the DNase activity of DFF40, the C-terminal region of DFF45 is also important for the DFF40-specific folding chaperone activity, as demonstrated by the ability of DFF45 to refold DFF40 [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	DNA FRAGMENTATION FACTOR ALPHA SUBUNIT	protein binding binding protein domain specific binding enzyme regulator activity molecular function inhibitor activity molecular function regulator activity nuclease inhibitor activity enzyme inhibitor activity deoxyribonuclease inhibitor activity protein folding chaperone	negative regulation of hydrolase activity regulation of cellular process regulation of catalytic activity negative regulation of deoxyribonuclease activity negative regulation of biological process negative regulation of catalytic activity negative regulation of nitrogen compound metabolic process negative regulation of cellular metabolic process regulation of primary metabolic process regulation of nitrogen compound metabolic process nucleobase-containing compound metabolic process organic substance metabolic process heterocycle metabolic process regulation of deoxyribonuclease activity regulation of nuclease activity negative regulation of hydrolase activity regulation of cellular process regulation of catalytic activity negative regulation of deoxyribonuclease activity negative regulation of biological process negative regulation of catalytic activity negative regulation of nitrogen compound metabolic process negative regulation of cellular metabolic process regulation of primary metabolic process regulation of nitrogen compound metabolic process nucleobase-containing compound metabolic process organic substance metabolic process heterocycle metabolic process regulation of deoxyribonuclease activity regulation of nuclease activity negative regulation of cellular process nitrogen compound metabolic process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process negative regulation of macromolecule metabolic process regulation of biological process cellular metabolic process negative regulation of metabolic process biological regulation negative regulation of molecular function cellular nitrogen compound metabolic process primary metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process DNA metabolic process nucleic acid metabolic process regulation of molecular function organic cyclic compound metabolic process regulation of hydrolase activity metabolic process cellular process negative regulation of DNA metabolic process macromolecule metabolic process regulation of metabolic process cellular aromatic compound metabolic process regulation of DNA metabolic process negative regulation of nuclease activity cellular catabolic process DNA catabolic process regulation of apoptotic DNA fragmentation cellular component disassembly aromatic compound catabolic process cell death cellular nitrogen compound catabolic process negative regulation of apoptotic DNA fragmentation nucleobase-containing compound catabolic process cellular component disassembly involved in execution phase of apoptosis heterocycle catabolic process nucleic acid catabolic process negative regulation of cellular catabolic process catabolic process macromolecule catabolic process regulation of DNA catabolic process cellular component organization execution phase of apoptosis apoptotic nuclear changes cellular component organization or biogenesis negative regulation of catabolic process regulation of catabolic process organic cyclic compound catabolic process apoptotic DNA fragmentation negative regulation of DNA catabolic process regulation of cellular catabolic process apoptotic process organic substance catabolic process programmed cell death organonitrogen compound metabolic process cellular biosynthetic process gene expression chaperone-mediated protein folding macromolecule biosynthetic process protein maturation protein folding biosynthetic process organic substance biosynthetic process protein metabolic process positive regulation of programmed cell death regulation of apoptotic process positive regulation of biological process regulation of programmed cell death positive regulation of apoptotic process positive regulation of cellular process lymphocyte apoptotic process thymocyte apoptotic process leukocyte apoptotic process T cell apoptotic process negative regulation of programmed cell death negative regulation of execution phase of apoptosis regulation of execution phase of apoptosis negative regulation of apoptotic process	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol cell periphery plasma membrane membrane membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm intracellular anatomical structure cytoplasm cellular anatomical entity cytosol cell periphery plasma membrane membrane membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen protein-containing complex protein-DNA complex intracellular non-membrane-bounded organelle chromatin chromosome non-membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR003508	CIDE-N domain	Domain
A	IPR015121	DNA fragmentation factor 45kDa, middle domain	Domain
A	IPR017299	DNA fragmentation factor 45	Family
A	IPR027296	DNA fragmentation factor 45kDa, C-terminal	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: O00273	breast carcinoma osteosarcoma estrogen-receptor negative breast cancer Pick disease lung cancer prostate carcinoma

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.