Annotations: 4I2O

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	YonK	e4i2oB2	A: alpha arrays	X: DP domain	H: DP domain	T: DP domain	F: YonK	ECOD (v295.2)
B	HisKA	e4i2oB3	A: alpha arrays	X: Thioredoxin-like	H: Thioredoxin-like	T: Thioredoxin-like	F: HisKA	ECOD (v295.2)
A	HSP90,HATPase_c_3	e4i2oA1	A: alpha arrays	X: Rossmann-like	H: Rossmann-related	T: NagB/RpiA/CoA transferase-like	F: HSP90,HATPase_c_3	ECOD (v295.2)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	2.60.120.10	Mainly Beta	Sandwich	Jelly Rolls	Jelly Rolls	CATH (4.3.0)
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)
A	2.60.120.10	Mainly Beta	Sandwich	Jelly Rolls	Jelly Rolls	CATH (4.3.0)
A	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)

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D [auth X]	Promoter of fixK2 direct target, fixN, downstream	-	-	-
C [auth W]	Promoter of fixK2 direct target, fixN, upstream	-	-	-
A, B	FixK2 protein	DNA binding binding nucleic acid binding transcription regulator activity DNA-binding transcription factor activity	-	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol

Chains	Accession	Name	Type
A, B	IPR014710	PpnP-like, jelly roll fold	Homologous Superfamily
A, B	IPR000595	Cyclic nucleotide-binding domain	Domain
A, B	IPR018490	Cyclic nucleotide-binding domain superfamily	Homologous Superfamily
A, B	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A, B	IPR050397	Env_Response_Regulators	Unknown
A, B	IPR036390	Winged helix DNA-binding domain superfamily	Homologous Superfamily
A, B	IPR012318	Crp-type HTH domain	Domain