Annotations: 5YRZ

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
D	HicA_toxin	e5yrzD1	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	HicA_toxin	e5yrzB1	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	UNK_F_TYPE	e5yrzC1	A: alpha arrays	X: HTH	H: HTH	T: Ribbon-helix-helix	F: UNK_F_TYPE	ECOD (1.6)
C	HicB_lk_antitox_N	e5yrzC2	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	UNK_F_TYPE	e5yrzA2	A: alpha arrays	X: HTH	H: HTH	T: Ribbon-helix-helix	F: UNK_F_TYPE	ECOD (1.6)
A	HicB_lk_antitox_N	e5yrzA1	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)
B	3.30.920.30	Alpha Beta	2-Layer Sandwich	Metal Transport, Frataxin	Chain A	CATH (4.3.0)
A	3.30.160.250	Alpha Beta	2-Layer Sandwich	Double Stranded RNA Binding Domain		CATH (utative)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B, D	PF07927	HicA toxin of bacterial toxin-antitoxin, (HicA_toxin)	HicA toxin of bacterial toxin-antitoxin,	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B, D	HicA	hydrolase activity catalytic activity RNA binding binding nucleic acid binding mRNA binding endonuclease activity nuclease activity catalytic activity, acting on a nucleic acid	-	-
A, C	HicB	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B, D	IPR012933	HicA mRNA interferase family	Family
B, D	IPR038570	HicA superfamily	Homologous Superfamily
A, C	IPR035069	Antitoxin HicB/UPF0150	Homologous Superfamily

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.