Annotations: 1PIL

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1pila_	Alpha and beta proteins (a+b)	Ferredoxin-like	GlnB-like	Prokaryotic signal transducing protein	PII (product of glnB)	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	GlnB-like	8035252	3001165	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		e1pilA1	A: C-terminal subdomain in Lon-related proteases catalytic domains	X: C-terminal subdomain in Lon-related proteases catalytic domains	H: C-terminal subdomain in Lon-related proteases catalytic domains	T: Propep_M14	F:	ECOD (20:10:01)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.70.120	Alpha Beta	2-Layer Sandwich	Alpha-Beta Plaits		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00543	Nitrogen regulatory protein P-II (P-II)	Nitrogen regulatory protein P-II	P-II modulates the activity of glutamine synthetase. It is a tetrameric protein encoded by the glnB gene, a component of the adenylation cascade involved in the regulation of GS activity [1,2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	SIGNAL TRANSDUCING PROTEIN P2	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding enzyme regulator activity enzyme activator activity molecular function activator activity molecular function regulator activity identical protein binding protein binding	regulation of cellular process oxoacid metabolic process ketone metabolic process regulation of lipid metabolic process lipid biosynthetic process organic acid biosynthetic process organic acid metabolic process carboxylic acid biosynthetic process regulation of primary metabolic process regulation of small molecule metabolic process small molecule metabolic process regulation of biosynthetic process regulation of biological process fatty acid metabolic process regulation of cellular process oxoacid metabolic process ketone metabolic process regulation of lipid metabolic process lipid biosynthetic process organic acid biosynthetic process organic acid metabolic process carboxylic acid biosynthetic process regulation of primary metabolic process regulation of small molecule metabolic process small molecule metabolic process regulation of biosynthetic process regulation of biological process fatty acid metabolic process monocarboxylic acid biosynthetic process small molecule biosynthetic process biological regulation carboxylic acid metabolic process primary metabolic process fatty acid biosynthetic process regulation of ketone metabolic process biosynthetic process regulation of fatty acid biosynthetic process regulation of fatty acid metabolic process metabolic process cellular process regulation of lipid biosynthetic process monocarboxylic acid metabolic process regulation of metabolic process lipid metabolic process response to nutrient levels regulation of response to nutrient levels response to stimulus homeostatic process nitrogen utilization regulation of nitrogen utilization cellular homeostasis chemical homeostasis regulation of response to stimulus intracellular nitrogen homeostasis intracellular chemical homeostasis	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR015867	Nitrogen regulatory protein PII/ATP phosphoribosyltransferase, C-terminal	Homologous Superfamily
A	IPR002332	Nitrogen regulatory protein P-II, urydylation site	PTM
A	IPR011322	Nitrogen regulatory PII-like, alpha/beta	Homologous Superfamily
A	IPR002187	Nitrogen regulatory protein PII	Family
A	IPR017918	Nitrogen regulatory protein PII, conserved site	Conserved Site

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.