Annotations: 2K9L

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Sigma factor domain-like	8092901	3000953	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF04963	e2k9lA1	A: alpha arrays	X: HTH	H: HTH	T: Sigma54 core-binding domain	F: PF04963	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.10.1330	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	RNA polymerase sigma-54 factor, core-binding domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF04963	Sigma-54 factor, core binding domain (Sigma54_CBD)	Sigma-54 factor, core binding domain	This domain makes a direct interaction with the core RNA polymerase, to form an enhancer dependent holoenzyme [1]. The centre of this domain contains a very weak similarity to a helix-turn-helix motif which may represent the other DNA binding domain. ...	This domain makes a direct interaction with the core RNA polymerase, to form an enhancer dependent holoenzyme [1]. The centre of this domain contains a very weak similarity to a helix-turn-helix motif which may represent the other DNA binding domain.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	RNA polymerase sigma factor RpoN	DNA binding binding organic cyclic compound binding nucleic acid binding transcription regulator activity DNA-binding transcription factor activity DNA-binding transcription activator activity transferase activity nucleotidyltransferase activity catalytic activity transferase activity, transferring phosphorus-containing groups 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	transferase complex, transferring phosphorus-containing groups protein-containing complex catalytic complex RNA polymerase complex DNA-directed RNA polymerase complex transferase complex intracellular protein-containing complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR038709	RNA polymerase sigma-54 factor, core-binding domain superfamily	Homologous Superfamily
A	IPR000394	RNA polymerase sigma factor 54	Family
A	IPR007046	RNA polymerase sigma factor 54, core-binding domain	Domain
A	IPR007634	RNA polymerase sigma factor 54, DNA-binding	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 R01GM133198.