5H6X

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF04542	e5h6xA1	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: PF04542	ECOD (1.6)
B	PF00140,PF04542	e5h6xB1	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: PF00140,PF04542	ECOD (1.6)

Chains	Accession	Name	Description	Comments	Source
A, B	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

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	RNA polymerase sigma factor RpoS	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 nucleic acid biosynthetic process biosynthetic 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 nucleic acid biosynthetic process biosynthetic process metabolic process cellular process macromolecule metabolic process	intracellular anatomical structure cytoplasm cellular anatomical entity

Chains	Accession	Name	Type
A, B	IPR007627	RNA polymerase sigma-70 region 2	Domain
A, B	IPR000943	RNA polymerase sigma-70	Domain
A, B	IPR013325	RNA polymerase sigma factor, region 2	Homologous Superfamily
A, B	IPR013324	RNA polymerase sigma factor, region 3/4-like	Homologous Superfamily
A, B	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A, B	IPR009042	RNA polymerase sigma-70 region 1.2	Domain
A, B	IPR007630	RNA polymerase sigma-70 region 4	Domain
A, B	IPR014284	RNA polymerase sigma-70-like domain	Domain
A, B	IPR007624	RNA polymerase sigma-70 region 3	Domain
A, B	IPR012761	RNA polymerase sigma factor RpoS	Family
A, B	IPR050239	Sigma-70 factor family, RNA polymerase initiation factors	Family