Annotations: 6HPB

Crystal structure of the E.coli HicAB toxin-antitoxin complex

External Resource: Annotation

Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
D	V-set	e6hpbD1	A: beta barrels	X: jelly-roll	H: DUF1107-like	T: DUF1107-like	F: V-set	ECOD (v294.2)
B	MAM33	e6hpbB1	A: beta barrels	X: HAD domain-like	H: Hemagglutinin HA2 chain	T: Hemagglutinin HA2 chain	F: MAM33	ECOD (v294.2)
C	V-set	e6hpbC1	A: beta barrels	X: jelly-roll	H: DUF1107-like	T: DUF1107-like	F: V-set	ECOD (v294.2)
A	MAM33	e6hpbA1	A: beta barrels	X: HAD domain-like	H: Hemagglutinin HA2 chain	T: Hemagglutinin HA2 chain	F: MAM33	ECOD (v294.2)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B, D	PF01381	Helix-turn-helix (HTH_3)	Helix-turn-helix	This large family of DNA binding helix-turn helix proteins includes Cro Swiss:P03036 and CI Swiss:P03034. Within the protein Swiss:Q5F9C2, the full protein fold incorporates a helix-turn-helix motif, but the function of this member is unlikely to be ...	This large family of DNA binding helix-turn helix proteins includes Cro Swiss:P03036 and CI Swiss:P03034. Within the protein Swiss:Q5F9C2, the full protein fold incorporates a helix-turn-helix motif, but the function of this member is unlikely to be that of a DNA-binding regulator, the function of most other members, so is not necessarily characteristic of the whole family [1].	Domain
B, D	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
A, C	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	Antitoxin HicB	DNA binding binding nucleic acid binding identical protein binding protein binding	regulation of growth regulation of biological process biological regulation growth response to stimulus response to stress 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 growth regulation of biological process biological regulation growth response to stimulus response to stress 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 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	protein-containing complex transcription regulator complex toxin-antitoxin complex transcription repressor complex
A, C	mRNA interferase toxin HicA	endonuclease activity nuclease activity catalytic activity, acting on RNA RNA endonuclease activity catalytic activity, acting on a nucleic acid RNA nuclease activity catalytic activity hydrolase activity RNA binding binding nucleic acid binding mRNA binding	regulation of growth regulation of biological process biological regulation growth 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 growth regulation of biological process biological regulation growth 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 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 catabolic process negative regulation of biological process macromolecule catabolic process negative regulation of cellular process RNA catabolic process negative regulation of macromolecule metabolic process mRNA catabolic process negative regulation of metabolic process mRNA metabolic process nucleobase-containing compound catabolic process negative regulation of gene expression negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process nucleic acid catabolic process	protein-containing complex transcription regulator complex toxin-antitoxin complex transcription repressor complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B, D	IPR035069	Antitoxin HicB/UPF0150	Homologous Superfamily
B, D	IPR051404	Type II Toxin-Antitoxin System Antitoxin	Family
B, D	IPR001387	Cro/C1-type, helix-turn-helix domain	Domain
B, D	IPR031807	HicB-like antitoxin of toxin-antitoxin system	Domain
B, D	IPR010982	Lambda repressor-like, DNA-binding domain superfamily	Homologous Superfamily
A, C	IPR012933	HicA mRNA interferase family	Family
A, C	IPR038570	HicA superfamily	Homologous Superfamily

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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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.

6HPB | pdb_00006hpb

Crystal structure of the E.coli HicAB toxin-antitoxin complex

External Resource: Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

Protein Family Annotation Pfam Database Homepage

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

InterPro: Protein Family Classification InterPro Database Homepage