Annotations: 3HRS

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	YgbB	e3hrsB1	A: alpha arrays	X: HTH	H: HTH	T: tetra-helical, lambda repressor-like	F: YgbB	ECOD (v295.2)
A	Calx-beta	e3hrsA1	A: alpha arrays	X: Alpha-beta plaits	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Calx-beta	ECOD (v295.2)

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	2.30.30.90	Mainly Beta	Roll	SH3 type barrels.	Ferrous iron transport protein A (FeoA)	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)
A	2.30.30.90	Mainly Beta	Roll	SH3 type barrels.	Ferrous iron transport protein A (FeoA)	CATH (4.3.0)

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Metalloregulator ScaR	DNA binding binding nucleic acid binding cation binding transition metal ion binding ion binding metal ion binding small molecule binding transcription regulator activity DNA-binding transcription factor activity protein binding protein dimerization activity	-	cellular anatomical structure intracellular anatomical structure cytoplasm

Chains	Accession	Name	Type
A, B	IPR036421	Iron dependent repressor, metal binding and dimerisation domain superfamily	Homologous Superfamily
A, B	IPR022689	Iron dependent repressor	Family
A, B	IPR001367	Iron dependent repressor, metal binding and dimerisation domain	Domain
A, B	IPR007167	Ferrous iron transporter FeoA-like domain	Domain
A, B	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A, B	IPR038157	Ferrous iron transporter, core domain	Homologous Superfamily
A, B	IPR008988	Transcriptional repressor, C-terminal	Homologous Superfamily
A, B	IPR036390	Winged helix DNA-binding domain superfamily	Homologous Superfamily
A, B	IPR022687	DTXR-type, HTH domain	Domain

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.

3HRS | pdb_00003hrs