Annotations: 4P78

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	TTHA1013/TTHA0281-like	8052313	3000880	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	TTHA1013/TTHA0281-like	8052313	3000880	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)
D	HicA_toxin	e4p78D1	A: a+b two layers	X: dsRBD-like	H: PI-Pfui intein middle domain (From Topology)	T: PI-Pfui intein middle domain	F: HicA_toxin	ECOD (1.6)
C	HicA_toxin	e4p78C1	A: a+b two layers	X: dsRBD-like	H: PI-Pfui intein middle domain (From Topology)	T: PI-Pfui intein middle domain	F: HicA_toxin	ECOD (1.6)
B	HicB_lk_antitox_N	e4p78B1	A: a+b duplicates or obligate multimers	X: TTHA1013/TTHA0281-like (From Topology)	H: TTHA1013/TTHA0281-like (From Topology)	T: TTHA1013/TTHA0281-like	F: HicB_lk_antitox_N	ECOD (1.6)
A	HicB_lk_antitox_N	e4p78A1	A: a+b duplicates or obligate multimers	X: TTHA1013/TTHA0281-like (From Topology)	H: TTHA1013/TTHA0281-like (From Topology)	T: TTHA1013/TTHA0281-like	F: HicB_lk_antitox_N	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D	3.30.920.30	Alpha Beta	2-Layer Sandwich	Metal Transport, Frataxin	Chain A	CATH (4.3.0)
C	3.30.920.30	Alpha Beta	2-Layer Sandwich	Metal Transport, Frataxin	Chain A	CATH (4.3.0)
B	3.30.160.250	Alpha Beta	2-Layer Sandwich	Double Stranded RNA Binding Domain		CATH (4.3.0)
A	3.30.160.250	Alpha Beta	2-Layer Sandwich	Double Stranded RNA Binding Domain		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF15919	HicB_like antitoxin of bacterial toxin-antitoxin system (HicB_lk_antitox)	HicB_like antitoxin of bacterial toxin-antitoxin system	This is a family of HicB-like antitoxins.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C, D	HicA3 Toxin	-	-	-
A, B	HicB3 antitoxin	sequence-specific DNA binding DNA binding binding nucleic acid binding	regulation of cellular process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological process biological regulation primary metabolic process regulation of cellular process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological process biological regulation primary metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of gene expression biosynthetic process cellular process metabolic process regulation of macromolecule biosynthetic process regulation of DNA-templated transcription macromolecule metabolic process regulation of metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR035069	Antitoxin HicB/UPF0150	Homologous Superfamily
A, B	IPR013321	Arc-type ribbon-helix-helix	Homologous Superfamily
A, B	IPR031807	HicB-like antitoxin of toxin-antitoxin system	Domain

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.