Annotations: 2Q1Z

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Sigma70_r4_2	e2q1zA2	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: Sigma70_r4_2	ECOD (1.6)
A	Sigma70_r2	e2q1zA1	A: alpha complex topology	X: Sigma2 domain-like	H: Sigma2 domain of RNA polymerase sigma factors (From Topology)	T: Sigma2 domain of RNA polymerase sigma factors	F: Sigma70_r2	ECOD (1.6)
C	Sigma70_r4_2	e2q1zC1	A: alpha arrays	X: HTH	H: HTH	T: tri-helical	F: Sigma70_r4_2	ECOD (1.6)
C	Sigma70_r2	e2q1zC2	A: alpha complex topology	X: Sigma2 domain-like	H: Sigma2 domain of RNA polymerase sigma factors (From Topology)	T: Sigma2 domain of RNA polymerase sigma factors	F: Sigma70_r2	ECOD (1.6)
D	Cupin_7	e2q1zD1	A: beta sandwiches	X: jelly-roll	H: Double-stranded beta-helix (From Topology)	T: Double-stranded beta-helix	F: Cupin_7	ECOD (1.6)
D	zf-HC2	e2q1zD3	A: alpha arrays	X: N-terminal, cytoplasmic domain of anti-sigma factors (From Topology)	H: N-terminal, cytoplasmic domain of anti-sigma factors (From Topology)	T: N-terminal, cytoplasmic domain of anti-sigma factors	F: zf-HC2	ECOD (1.6)
B	Cupin_7	e2q1zB3	A: beta sandwiches	X: jelly-roll	H: Double-stranded beta-helix (From Topology)	T: Double-stranded beta-helix	F: Cupin_7	ECOD (1.6)
B	zf-HC2	e2q1zB4	A: alpha arrays	X: N-terminal, cytoplasmic domain of anti-sigma factors (From Topology)	H: N-terminal, cytoplasmic domain of anti-sigma factors (From Topology)	T: N-terminal, cytoplasmic domain of anti-sigma factors	F: zf-HC2	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D	1.10.10.1320	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Anti-sigma factor, zinc-finger domain	CATH (4.3.0)
D	2.60.120.10	Mainly Beta	Sandwich	Jelly Rolls	Jelly Rolls	CATH (4.3.0)
B	1.10.10.1320	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Anti-sigma factor, zinc-finger domain	CATH (4.3.0)
B	2.60.120.10	Mainly Beta	Sandwich	Jelly Rolls	Jelly Rolls	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C	PF04542	Sigma-70 region 2 (Sigma70_r2)	Sigma-70 region 2	Region 2 of sigma-70 is the most conserved region of the entire protein. All members of this class of sigma-factor contain region 2. The high conservation is due to region 2 containing both the -10 promoter recognition helix and the primary core RNA ...	Region 2 of sigma-70 is the most conserved region of the entire protein. All members of this class of sigma-factor contain region 2. The high conservation is due to region 2 containing both the -10 promoter recognition helix and the primary core RNA polymerase binding determinant. The core binding helix, interacts with the clamp domain of the largest polymerase subunit, beta prime [1,2]. The aromatic residues of the recognition helix, found at the C-terminus of this domain are though to mediate strand separation, thereby allowing transcription initiation [1,2].	Domain
A, C	PF04545	Sigma-70, region 4 (Sigma70_r4)	Sigma-70, region 4	Region 4 of sigma-70 like sigma-factors are involved in binding to the -35 promoter element via a helix-turn-helix motif [1]. Due to the way Pfam works, the threshold has been set artificially high to prevent overlaps with other helix-turn-helix fami ...	Region 4 of sigma-70 like sigma-factors are involved in binding to the -35 promoter element via a helix-turn-helix motif [1]. Due to the way Pfam works, the threshold has been set artificially high to prevent overlaps with other helix-turn-helix families. Therefore there are many false negatives.	Domain
B, D	PF12973	ChrR Cupin-like domain (Cupin_7)	ChrR Cupin-like domain	Members of this family are part of the cupin superfamily. This family includes the transcriptional activator ChrR.	Domain
B, D	PF13490	Putative zinc-finger (zf-HC2)	Putative zinc-finger	This is a putative zinc-finger found in some anti-sigma factor proteins.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C	RpoE, ECF SigE	DNA binding binding organic cyclic compound binding nucleic acid binding transcription regulator activity DNA-binding transcription factor activity sigma factor activity	cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process DNA-templated transcription initiation nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription organic cyclic compound metabolic process nucleic acid biosynthetic process organic substance metabolic process cellular biosynthetic process cellular metabolic process RNA metabolic process primary metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process DNA-templated transcription initiation nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription organic cyclic compound metabolic process nucleic acid biosynthetic process organic substance metabolic process biosynthetic process organic cyclic compound biosynthetic process organic substance biosynthetic process metabolic process cellular process macromolecule metabolic process	-
B, D	Anti-Sigma factor ChrR, transcriptional activator ChrR	DNA binding binding organic cyclic compound binding nucleic acid binding cation binding ion binding metal ion binding small molecule binding	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C	IPR007627	RNA polymerase sigma-70 region 2	Domain
A, C	IPR013325	RNA polymerase sigma factor, region 2	Homologous Superfamily
A, C	IPR013324	RNA polymerase sigma factor, region 3/4-like	Homologous Superfamily
A, C	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A, C	IPR014284	RNA polymerase sigma-70 like domain	Domain
A, C	IPR039425	RNA polymerase sigma-70 like	Family
A, C	IPR007630	RNA polymerase sigma-70 region 4	Domain
B, D	IPR041916	Anti-sigma factor, zinc-finger domain superfamily	Homologous Superfamily
B, D	IPR025979	ChrR-like cupin domain	Domain
B, D	IPR011051	RmlC-like cupin domain superfamily	Homologous Superfamily
B, D	IPR027383	Putative zinc-finger	Domain
B, D	IPR012807	Anti-sigma-E factor ChrR	Family
B, D	IPR014710	RmlC-like jelly roll fold	Homologous Superfamily

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.