Annotations: 3K3R

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth E]	SCOP2B Superfamily	LexA/Signal peptidase-like	8002599	3000103	SCOP2B (2022-06-29)
A [auth E]	SCOP2B Superfamily	Winged helix DNA-binding domain	8002596	3000034	SCOP2B (2022-06-29)
B [auth F]	SCOP2B Superfamily	Winged helix DNA-binding domain	8002596	3000034	SCOP2B (2022-06-29)
B [auth F]	SCOP2B Superfamily	LexA/Signal peptidase-like	8002599	3000103	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 [auth E]	Peptidase_S24	e3k3rE1	A: beta barrels	X: SH3	H: LexA/Signal peptidase (From Topology)	T: LexA/Signal peptidase	F: Peptidase_S24	ECOD (1.6)
A [auth E]	LexA_DNA_bind	e3k3rE2	A: alpha arrays	X: HTH	H: HTH	T: winged	F: LexA_DNA_bind	ECOD (1.6)
B [auth F]	Peptidase_S24	e3k3rF1	A: beta barrels	X: SH3	H: LexA/Signal peptidase (From Topology)	T: LexA/Signal peptidase	F: Peptidase_S24	ECOD (1.6)
B [auth F]	LexA_DNA_bind	e3k3rF2	A: alpha arrays	X: HTH	H: HTH	T: winged	F: LexA_DNA_bind	ECOD (1.6)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth E], B [auth F]	LexA repressor	DNA binding binding nucleic acid binding sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding double-stranded DNA binding transcription regulatory region nucleic acid binding peptidase activity catalytic activity, acting on a protein serine hydrolase activity serine-type peptidase activity hydrolase activity serine-type endopeptidase activity DNA binding binding nucleic acid binding sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding double-stranded DNA binding transcription regulatory region nucleic acid binding peptidase activity catalytic activity, acting on a protein serine hydrolase activity serine-type peptidase activity hydrolase activity serine-type endopeptidase activity catalytic activity endopeptidase activity identical protein binding protein binding transcription regulator activity DNA-binding transcription repressor activity DNA-binding transcription factor activity	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process regulation of cellular process negative regulation of biological process RNA metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process regulation of cellular process negative regulation of biological process RNA metabolic process regulation of primary metabolic process negative regulation of RNA biosynthetic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process regulation of RNA metabolic process negative regulation of cellular process negative regulation of nucleobase-containing compound metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process negative regulation of macromolecule metabolic process regulation of biosynthetic process negative regulation of DNA-templated transcription regulation of biological process negative regulation of metabolic 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 negative regulation of biosynthetic process negative regulation of macromolecule 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 DNA replication DNA metabolic process DNA repair SOS response proteolysis protein metabolic process	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol protein-containing complex protein-DNA complex
C [auth A], D [auth B]	DNA (28-MER)	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth E], B [auth F]	IPR015927	Peptidase S24/S26A/S26B/S26C	Domain
A [auth E], B [auth F]	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A [auth E], B [auth F]	IPR050077	LexA repressor	Family
A [auth E], B [auth F]	IPR036390	Winged helix DNA-binding domain superfamily	Homologous Superfamily
A [auth E], B [auth F]	IPR006199	LexA repressor, DNA-binding domain	Domain
A [auth E], B [auth F]	IPR039418	LexA-like	Domain
A [auth E], B [auth F]	IPR006200	Transcription regulator LexA	Family
A [auth E], B [auth F]	IPR036286	LexA/Signal peptidase-like superfamily	Homologous Superfamily
A [auth E], B [auth F]	IPR006197	Peptidase S24, LexA-like	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 R01GM157729.