Annotations: 3BDN

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D [auth B]	SCOP2B Superfamily	LexA/Signal peptidase-like	8058185	3000103	SCOP2B (2022-06-29)
D [auth B]	SCOP2B Superfamily	lambda C1 repressor DNA-binding domain-like	8058183	3000119	SCOP2B (2022-06-29)
C [auth A]	SCOP2 Family	LexA endopeptidase domain-like	8058184	4000321	SCOP2 (2022-06-29)
C [auth A]	SCOP2 Family	XRE-like regulatory proteins	8058182	4000362	SCOP2 (2022-06-29)
C [auth A]	SCOP2 Superfamily	LexA/Signal peptidase-like	8058185	3000103	SCOP2 (2022-06-29)
C [auth A]	SCOP2 Superfamily	lambda C1 repressor DNA-binding domain-like	8058183	3000119	SCOP2 (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 [auth B]	PF00717	e3bdnB5	A: beta barrels	X: SH3	H: LexA/Signal peptidase (From Topology)	T: LexA/Signal peptidase	F: PF00717	ECOD (1.6)
D [auth B]	PF01381	e3bdnB6	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: PF01381	ECOD (1.6)
C [auth A]	PF00717	e3bdnA1	A: beta barrels	X: SH3	H: LexA/Signal peptidase (From Topology)	T: LexA/Signal peptidase	F: PF00717	ECOD (1.6)
C [auth A]	PF01381	e3bdnA2	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: PF01381	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D [auth B]	1.10.260.40	Mainly Alpha	Orthogonal Bundle	434 Repressor (Amino-terminal Domain)	lambda repressor-like DNA-binding domains	CATH (4.3.0)
D [auth B]	2.10.109.10	Mainly Beta	Ribbon	Umud Fragment, subunit A	Umud Fragment, subunit A	CATH (4.3.0)
C [auth A]	1.10.260.40	Mainly Alpha	Orthogonal Bundle	434 Repressor (Amino-terminal Domain)	lambda repressor-like DNA-binding domains	CATH (4.3.0)
C [auth A]	2.10.109.10	Mainly Beta	Ribbon	Umud Fragment, subunit A	Umud Fragment, subunit A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C [auth A], D [auth B]	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
C [auth A], D [auth B]	PF00717	Peptidase S24-like (Peptidase_S24)	Peptidase S24-like	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth C]	DNA (5'-D(DAPDAPDTPDAPDCPDCPDAPDCPDTPDGPDGPDCPDGPDGPDTPDGPDAPDTPDAPDT)-3')	-	-	-
B [auth D]	DNA (5'-D(DTPDAPDTPDAPDTPDCPDAPDCPDCPDGPDCPDCPDAPDGPDTPDGPDGPDTPDAPDT)-3')	-	-	-
C [auth A], D [auth B]	Lambda Repressor	DNA binding sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding binding double-stranded DNA binding organic cyclic compound binding core promoter sequence-specific DNA binding nucleic acid binding transcription regulatory region nucleic acid binding identical protein binding protein binding	latent virus replication viral process viral latency release from viral latency latency-replication decision 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 latent virus replication viral process viral latency release from viral latency latency-replication decision 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 transcription by competitive promoter binding 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 maintenance of viral latency viral gene expression regulation of viral process regulation of viral transcription positive regulation of viral process positive regulation of biological process viral transcription positive regulation of viral transcription	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth A], D [auth B]	IPR015927	Peptidase S24/S26A/S26B/S26C	Domain
C [auth A], D [auth B]	IPR001387	Cro/C1-type helix-turn-helix domain	Domain
C [auth A], D [auth B]	IPR039418	LexA-like	Domain
C [auth A], D [auth B]	IPR036286	LexA/Signal peptidase-like superfamily	Homologous Superfamily
C [auth A], D [auth B]	IPR010982	Lambda repressor-like, DNA-binding domain superfamily	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 R01GM133198.