2H3C

Structural basis for nucleic acid and toxin recognition of the bacterial antitoxin CcdA

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)
C [auth A]	PF07362	e2h3cA1	A: alpha arrays	X: HTH	H: HTH	T: Ribbon-helix-helix	F: PF07362	ECOD (1.6)
D [auth B]	PF07362	e2h3cB1	A: alpha arrays	X: HTH	H: HTH	T: Ribbon-helix-helix	F: PF07362	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C [auth A], D [auth B]	PF07362	Post-segregation antitoxin CcdA (CcdA)	Post-segregation antitoxin CcdA	This family consists of several Enterobacterial post-segregation antitoxin CcdA proteins. The F plasmid-carried bacterial toxin, the CcdB protein, is known to act on DNA gyrase in two different ways. CcdB poisons the gyrase-DNA complex, blocking the ...	This family consists of several Enterobacterial post-segregation antitoxin CcdA proteins. The F plasmid-carried bacterial toxin, the CcdB protein, is known to act on DNA gyrase in two different ways. CcdB poisons the gyrase-DNA complex, blocking the passage of polymerases and leading to double-strand breakage of the DNA. Alternatively, in cells that overexpress CcdB, the A subunit of DNA gyrase (GyrA) has been found as an inactive complex with CcdB. Both poisoning and inactivation can be prevented and reversed in the presence of the F plasmid-encoded antidote, the CcdA protein [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth C]	5'-D(PAPTPAPTPGPTPAPTPAPCPCPCP*G)-3'	-	-	-
B [auth D]	5'-D(PTPCPGPGPGPTPAPTPAPCPAPTP*A)-3'	-	-	-
C [auth A], D [auth B]	CcdA	DNA binding binding organic cyclic compound binding nucleic acid binding molecular sequestering activity toxin sequestering activity	regulation of cellular process negative regulation of biological process negative regulation of cellular metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription regulation of RNA metabolic process organic substance biosynthetic process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process negative regulation of DNA-templated transcription regulation of biological process cellular metabolic process regulation of cellular process negative regulation of biological process negative regulation of cellular metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription regulation of RNA metabolic process organic substance biosynthetic process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process negative regulation of DNA-templated transcription regulation of biological process cellular metabolic process negative regulation of metabolic process primary metabolic process regulation of cellular metabolic process negative regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process negative regulation of macromolecule biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process regulation of DNA-templated transcription regulation of metabolic process negative regulation of RNA metabolic process cellular biosynthetic process RNA metabolic process RNA biosynthetic process nucleic acid biosynthetic process organic substance metabolic process negative regulation of cellular process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of biosynthetic process biological regulation regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process negative regulation of biosynthetic process cellular process cellular component organization cellular component disassembly protein-containing complex organization protein-containing complex disassembly cellular component organization or biogenesis	protein-containing complex transcription regulator complex transcription repressor complex toxin-antitoxin complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth A], D [auth B]	IPR009956	Post-segregation antitoxin CcdA	Family

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 R01GM133198.