Annotations: 3N5B

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Prokaryotic signal transducing protein	8074408	4001256	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	GlnB-like	8074409	3001165	SCOP2 (2022-06-29)
B	SCOP2 Family	PipX-like	8047163	4005478	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	PipX-like	8092204	3002570	SCOP2 (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	P-II	e3n5bA1	A: a+b two layers	X: Alpha-beta plaits	H: GlnB-like (From Topology)	T: GlnB-like	F: P-II	ECOD (1.6)
B	DUF3539	e3n5bB1	A: a+b two layers	X: PipX (From Topology)	H: PipX (From Topology)	T: PipX	F: DUF3539	ECOD (1.6)

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)
B	2.30.30.660	Mainly Beta	Roll	SH3 type barrels.	Protein of unknown function (DUF3539)	CATH (4.3.0)
B	6.10.250.870	Special	Helix non-globular	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		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.	Domain
B	PF12058	PII-interacting protein X (PipX)	PII-interacting protein X	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Nitrogen regulatory protein P-II	enzyme regulator activity molecular function regulator activity binding nucleoside phosphate binding organic cyclic compound binding nucleotide binding heterocyclic compound binding small molecule binding	response to nutrient levels regulation of response to nutrient levels regulation of biological process response to stimulus homeostatic process nitrogen utilization biological regulation regulation of nitrogen utilization cellular homeostasis chemical homeostasis regulation of response to stimulus intracellular nitrogen homeostasis intracellular chemical homeostasis	-
B	Asr0485 protein	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR015867	Nitrogen regulatory protein PII/ATP phosphoribosyltransferase, C-terminal	Homologous Superfamily
A	IPR011322	Nitrogen regulatory PII-like, alpha/beta	Homologous Superfamily
A	IPR002187	Nitrogen regulatory protein PII	Family
A	IPR002332	Nitrogen regulatory protein P-II, urydylation site	PTM
A	IPR017918	Nitrogen regulatory protein PII, conserved site	Conserved Site
B	IPR021926	PII-interacting protein X, cyanobacteria	Family

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.