Annotations: 1XB1

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1xb1a_	Small proteins	Inhibitor of apoptosis (IAP) repeat	Inhibitor of apoptosis (IAP) repeat	Inhibitor of apoptosis (IAP) repeat	BIR-containing protein 8	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
E [auth C]	d1xb1c_	Small proteins	Inhibitor of apoptosis (IAP) repeat	Inhibitor of apoptosis (IAP) repeat	Inhibitor of apoptosis (IAP) repeat	BIR-containing protein 8	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
I [auth E]	d1xb1e_	Small proteins	Inhibitor of apoptosis (IAP) repeat	Inhibitor of apoptosis (IAP) repeat	Inhibitor of apoptosis (IAP) repeat	BIR-containing protein 8	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
K [auth F]	d1xb1f_	Small proteins	Inhibitor of apoptosis (IAP) repeat	Inhibitor of apoptosis (IAP) repeat	Inhibitor of apoptosis (IAP) repeat	BIR-containing protein 8	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C [auth B]	d1xb1b_	Small proteins	Inhibitor of apoptosis (IAP) repeat	Inhibitor of apoptosis (IAP) repeat	Inhibitor of apoptosis (IAP) repeat	BIR-containing protein 8	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
G [auth D]	d1xb1d_	Small proteins	Inhibitor of apoptosis (IAP) repeat	Inhibitor of apoptosis (IAP) repeat	Inhibitor of apoptosis (IAP) repeat	BIR-containing protein 8	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	SCOP2B Superfamily	Inhibitor of apoptosis (IAP) repeat	8043758	3001510	SCOP2B (2022-06-29)
E [auth C]	SCOP2B Superfamily	Inhibitor of apoptosis (IAP) repeat	8043758	3001510	SCOP2B (2022-06-29)
I [auth E]	SCOP2B Superfamily	Inhibitor of apoptosis (IAP) repeat	8043758	3001510	SCOP2B (2022-06-29)
K [auth F]	SCOP2B Superfamily	Inhibitor of apoptosis (IAP) repeat	8043758	3001510	SCOP2B (2022-06-29)
C [auth B]	SCOP2B Superfamily	Inhibitor of apoptosis (IAP) repeat	8043758	3001510	SCOP2B (2022-06-29)
G [auth D]	SCOP2B Superfamily	Inhibitor of apoptosis (IAP) repeat	8043758	3001510	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	BIR	e1xb1A1	A: few secondary structure elements	X: Inhibitor of apoptosis (IAP) repeat (From Topology)	H: Inhibitor of apoptosis (IAP) repeat (From Topology)	T: Inhibitor of apoptosis (IAP) repeat	F: BIR	ECOD (1.6)
E [auth C]	BIR	e1xb1C1	A: few secondary structure elements	X: Inhibitor of apoptosis (IAP) repeat (From Topology)	H: Inhibitor of apoptosis (IAP) repeat (From Topology)	T: Inhibitor of apoptosis (IAP) repeat	F: BIR	ECOD (1.6)
I [auth E]	BIR	e1xb1E1	A: few secondary structure elements	X: Inhibitor of apoptosis (IAP) repeat (From Topology)	H: Inhibitor of apoptosis (IAP) repeat (From Topology)	T: Inhibitor of apoptosis (IAP) repeat	F: BIR	ECOD (1.6)
K [auth F]	BIR	e1xb1F1	A: few secondary structure elements	X: Inhibitor of apoptosis (IAP) repeat (From Topology)	H: Inhibitor of apoptosis (IAP) repeat (From Topology)	T: Inhibitor of apoptosis (IAP) repeat	F: BIR	ECOD (1.6)
C [auth B]	BIR	e1xb1B1	A: few secondary structure elements	X: Inhibitor of apoptosis (IAP) repeat (From Topology)	H: Inhibitor of apoptosis (IAP) repeat (From Topology)	T: Inhibitor of apoptosis (IAP) repeat	F: BIR	ECOD (1.6)
G [auth D]	BIR	e1xb1D1	A: few secondary structure elements	X: Inhibitor of apoptosis (IAP) repeat (From Topology)	H: Inhibitor of apoptosis (IAP) repeat (From Topology)	T: Inhibitor of apoptosis (IAP) repeat	F: BIR	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.1170.10	Mainly Alpha	Orthogonal Bundle	Inhibitor Of Apoptosis Protein (2mihbC-IAP-1)	Chain A	CATH (4.3.0)
E [auth C]	1.10.1170.10	Mainly Alpha	Orthogonal Bundle	Inhibitor Of Apoptosis Protein (2mihbC-IAP-1)	Chain A	CATH (4.3.0)
I [auth E]	1.10.1170.10	Mainly Alpha	Orthogonal Bundle	Inhibitor Of Apoptosis Protein (2mihbC-IAP-1)	Chain A	CATH (4.3.0)
K [auth F]	1.10.1170.10	Mainly Alpha	Orthogonal Bundle	Inhibitor Of Apoptosis Protein (2mihbC-IAP-1)	Chain A	CATH (4.3.0)
C [auth B]	1.10.1170.10	Mainly Alpha	Orthogonal Bundle	Inhibitor Of Apoptosis Protein (2mihbC-IAP-1)	Chain A	CATH (4.3.0)
G [auth D]	1.10.1170.10	Mainly Alpha	Orthogonal Bundle	Inhibitor Of Apoptosis Protein (2mihbC-IAP-1)	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C [auth B], E [auth C], G [auth D], I [auth E], A, C [auth B], E [auth C], G [auth D], I [auth E], K [auth F]	PF00653	Inhibitor of Apoptosis domain (BIR)	Inhibitor of Apoptosis domain	BIR stands for 'Baculovirus Inhibitor of apoptosis protein Repeat'. It is found repeated in inhibitor of apoptosis proteins (IAPs), and in fact it is also known as IAP repeat. These domains characteristically have a number of invariant residues, incl ...	BIR stands for 'Baculovirus Inhibitor of apoptosis protein Repeat'. It is found repeated in inhibitor of apoptosis proteins (IAPs), and in fact it is also known as IAP repeat. These domains characteristically have a number of invariant residues, including 3 conserved cysteines and one conserved histidine that coordinate a zinc ion. They are usually made up of 4-5 alpha helices and a three-stranded beta-sheet. BIR is also found in other proteins known as BIR-domain-containing proteins (BIRPs), such as Survivin (Swiss:O15392) [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C [auth B], E [auth C], G [auth D], I [auth E], A, C [auth B], E [auth C], G [auth D], I [auth E], K [auth F]	Baculoviral IAP repeat-containing protein 8	enzyme regulator activity cysteine-type endopeptidase inhibitor activity involved in apoptotic process molecular function regulator activity cysteine-type endopeptidase regulator activity involved in apoptotic process aminoacyltransferase activity ubiquitin-like protein transferase activity catalytic activity, acting on a protein acyltransferase activity ubiquitin-like protein ligase activity ubiquitin protein ligase activity transferase activity catalytic activity ubiquitin-protein transferase activity cation binding enzyme regulator activity cysteine-type endopeptidase inhibitor activity involved in apoptotic process molecular function regulator activity cysteine-type endopeptidase regulator activity involved in apoptotic process aminoacyltransferase activity ubiquitin-like protein transferase activity catalytic activity, acting on a protein acyltransferase activity ubiquitin-like protein ligase activity ubiquitin protein ligase activity transferase activity catalytic activity ubiquitin-protein transferase activity cation binding ion binding binding metal ion binding small molecule binding	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 cellular process apoptotic process programmed cell death cellular response to stimulus 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 cellular process apoptotic process programmed cell death cellular response to stimulus positive regulation of cell communication positive regulation of signal transduction response to stimulus signaling regulation of canonical Wnt signaling pathway canonical Wnt signaling pathway positive regulation of biological process regulation of signal transduction cell communication positive regulation of response to stimulus positive regulation of Wnt signaling pathway signal transduction Wnt signaling pathway positive regulation of cellular process positive regulation of canonical Wnt signaling pathway regulation of signaling cell surface receptor signaling pathway regulation of Wnt signaling pathway regulation of response to stimulus regulation of cell communication positive regulation of signaling regulation of protein modification process positive regulation of protein metabolic process regulation of protein ubiquitination positive regulation of post-translational protein modification regulation of primary metabolic process positive regulation of metabolic process positive regulation of protein modification process protein ubiquitination positive regulation of macromolecule metabolic process protein metabolic process regulation of protein modification by small protein conjugation or removal protein modification process positive regulation of protein modification by small protein conjugation or removal positive regulation of protein ubiquitination regulation of post-translational protein modification regulation of protein metabolic process primary metabolic process regulation of macromolecule metabolic process macromolecule modification metabolic process macromolecule metabolic process post-translational protein modification regulation of metabolic process protein modification by small protein conjugation protein modification by small protein conjugation or removal cell cycle regulation of cell cycle	intracellular anatomical structure cytoplasm cellular anatomical entity membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle
B [auth G], D [auth H], F [auth I], H [auth J], J [auth K], B [auth G], D [auth H], F [auth I], H [auth J], J [auth K], L	Diablo homolog, mitochondrial	-	regulation of catalytic activity positive regulation of protein metabolic process positive regulation of peptidase activity positive regulation of biological process positive regulation of cysteine-type endopeptidase activity involved in apoptotic process regulation of primary metabolic process positive regulation of molecular function positive regulation of metabolic process regulation of cysteine-type endopeptidase activity involved in apoptotic process regulation of proteolysis proteolysis regulation of endopeptidase activity positive regulation of macromolecule metabolic process protein metabolic process regulation of catalytic activity positive regulation of protein metabolic process positive regulation of peptidase activity positive regulation of biological process positive regulation of cysteine-type endopeptidase activity involved in apoptotic process regulation of primary metabolic process positive regulation of molecular function positive regulation of metabolic process regulation of cysteine-type endopeptidase activity involved in apoptotic process regulation of proteolysis proteolysis regulation of endopeptidase activity positive regulation of macromolecule metabolic process protein metabolic process activation of cysteine-type endopeptidase activity involved in apoptotic process regulation of cysteine-type endopeptidase activity regulation of biological process regulation of protein metabolic process regulation of peptidase activity biological regulation positive regulation of catalytic activity primary metabolic process regulation of macromolecule metabolic process regulation of molecular function positive regulation of hydrolase activity positive regulation of cysteine-type endopeptidase activity regulation of hydrolase activity positive regulation of endopeptidase activity positive regulation of proteolysis metabolic process macromolecule metabolic process regulation of metabolic process neuron apoptotic process cellular process apoptotic process cell death programmed cell death cellular response to stimulus regulation of cellular process response to stimulus signaling intracellular signal transduction cell communication apoptotic signaling pathway signal transduction intrinsic apoptotic signaling pathway positive regulation of programmed cell death regulation of apoptotic process regulation of programmed cell death positive regulation of apoptotic process positive regulation of cellular process activation of cysteine-type endopeptidase activity involved in apoptotic process by cytochrome c intrinsic apoptotic signaling pathway in response to oxidative stress extrinsic apoptotic signaling pathway via death domain receptors cell surface receptor signaling pathway extrinsic apoptotic signaling pathway	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle cell periphery protein-containing complex plasma membrane protein complex membrane plasma membrane plasma membrane signaling receptor complex membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle cell periphery protein-containing complex plasma membrane protein complex membrane plasma membrane plasma membrane signaling receptor complex membrane protein complex CD40 receptor complex receptor complex cytosol cytoplasmic side of plasma membrane cytoplasmic side of membrane side of membrane mitochondrial intermembrane space membrane-enclosed lumen intracellular organelle lumen organelle envelope lumen organelle envelope organelle lumen mitochondrial envelope

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C [auth B], E [auth C], G [auth D], I [auth E], A, C [auth B], E [auth C], G [auth D], I [auth E], K [auth F]	IPR011029	Death-like domain superfamily	Homologous Superfamily
A, C [auth B], E [auth C], G [auth D], I [auth E], A, C [auth B], E [auth C], G [auth D], I [auth E], K [auth F]	IPR042579	XIAP/BIRC8, UBA domain	Domain
A, C [auth B], E [auth C], G [auth D], I [auth E], A, C [auth B], E [auth C], G [auth D], I [auth E], K [auth F]	IPR001370	BIR repeat	Repeat
A, C [auth B], E [auth C], G [auth D], I [auth E], A, C [auth B], E [auth C], G [auth D], I [auth E], K [auth F]	IPR050784	Inhibitor of Apoptosis	Family
A, C [auth B], E [auth C], G [auth D], I [auth E], A, C [auth B], E [auth C], G [auth D], I [auth E], K [auth F]	IPR048875	BIRC2/3-like, UBA domain	Domain
A, C [auth B], E [auth C], G [auth D], I [auth E], A, C [auth B], E [auth C], G [auth D], I [auth E], K [auth F]	IPR001841	Zinc finger, RING-type	Domain
B [auth G], D [auth H], F [auth I], H [auth J], J [auth K], B [auth G], D [auth H], F [auth I], H [auth J], J [auth K], L	IPR015142	Smac/DIABLO protein	Family
B [auth G], D [auth H], F [auth I], H [auth J], J [auth K], B [auth G], D [auth H], F [auth I], H [auth J], J [auth K], L	IPR009062	Smac/DIABLO-like superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B [auth G], D [auth H], F [auth I], H [auth J], J [auth K], B [auth G], D [auth H], F [auth I], H [auth J], J [auth K], L	Pharos: Q9NR28	autosomal dominant nonsyndromic deafness 64 Huntington disease nonsyndromic genetic deafness brain ischemia Myocardial Reperfusion Injury prostate cancer osteoarthritis, hip allergic rhinitis cancer juvenile Huntington disease osteoarthritis

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.