Annotations: 3SQN

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Sigma70_r2,Sigma70_ner	e3sqnB1	A: beta barrels	X: Lipocalins/Streptavidin	H: SAM/DNA-glycosylase	T: SAM domain-like	F: Sigma70_r2,Sigma70_ner	ECOD (v294.2)
A	Piwi	e3sqnA4	A: beta barrels	X: Lipocalins/Streptavidin	H: Fibronectin type I module-like	T: Fibronectin type I module	F: Piwi	ECOD (v294.2)
A		e3sqnA1	A: beta barrels	X: Lipocalins/Streptavidin	H: RIFT-related	T: acid protease	F:	ECOD (v294.2)
A	tRNA-synt_1_2	e3sqnA2	A: beta barrels	X: Lipocalins/Streptavidin	H: RIFT-related	T: acid protease	F: tRNA-synt_1_2	ECOD (v294.2)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	1.10.10.10	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain	CATH (4.3.0)
B	1.10.1790.40	Mainly Alpha	Orthogonal Bundle	PTS-regulatory domain, PRD		CATH (4.3.0)
B	1.10.1790.30	Mainly Alpha	Orthogonal Bundle	PTS-regulatory domain, PRD		CATH (4.3.0)
B	3.40.50.2300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Response regulator	CATH (4.3.0)
A	1.10.1790.40	Mainly Alpha	Orthogonal Bundle	PTS-regulatory domain, PRD		CATH (4.3.0)
A	1.10.1790.30	Mainly Alpha	Orthogonal Bundle	PTS-regulatory domain, PRD		CATH (4.3.0)
A	3.40.50.2300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Response regulator	CATH (4.3.0)

Chains	Accession	Name	Description	Comments	Source
A, B	PF18333	Non-canonical single-stranded DNA-binding domain (ssDNA_DBD)	Non-canonical single-stranded DNA-binding domain	This domain is found in ThermoDBP, a non-canonical single-stranded DNA-binding protein in Thermoproteales. Single-stranded DNA-binding proteins are needed for DNA metabolism, sequestering and protecting transiently formed ssDNA during DNA replication ...	This domain is found in ThermoDBP, a non-canonical single-stranded DNA-binding protein in Thermoproteales. Single-stranded DNA-binding proteins are needed for DNA metabolism, sequestering and protecting transiently formed ssDNA during DNA replication and recombination, detecting DNA damage and recruiting repair proteins. The outer edge of the ssDNA-binding cleft, formed by this domain, has a strongly positive electrostatic surface potential because of the conserved basic residues R49, K54, R65, R80, R86, R90, K97, and R112 [1].	Domain
A, B	PF08280	M protein trans-acting positive regulator (MGA) HTH domain (HTH_Mga)	M protein trans-acting positive regulator (MGA) HTH domain	Mga is a DNA-binding protein that activates the expression of several important virulence genes in group A streptococcus in response to changing environmental conditions [1].	Domain

Chains	Accession	Name	Type
A, B	IPR013199	M protein trans-acting positive regulator (MGA) HTH domain	Domain
A, B	IPR007737	Mga helix-turn-helix domain	Domain
A, B	IPR050661	BglG family transcriptional antiterminators	Family
A, B	IPR036388	Winged helix-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 R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.

3SQN | pdb_00003sqn