Annotations: 3NG0

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d3ng0a1	Alpha and beta proteins (a+b)	beta-Grasp (ubiquitin-like)	Glutamine synthetase, N-terminal domain	automated matches	automated matches	(Synechocystis sp. PCC 6803 ) [TaxId: 1148 ],	SCOPe (2.08)
A	d3ng0a2	Alpha and beta proteins (a+b)	Glutamine synthetase/guanido kinase	Glutamine synthetase/guanido kinase	automated matches	automated matches	(Synechocystis sp. PCC 6803 ) [TaxId: 1148 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Gln-synt_N	e3ng0A2	A: beta barrels	X: Ribosomal protein L25-like	H: Glutamine synthetase, N-terminal domain (From Topology)	T: Glutamine synthetase, N-terminal domain	F: Gln-synt_N	ECOD (1.6)
A	Gln-synt_C	e3ng0A1	A: a+b two layers	X: Glutamine synthetase-like	H: Glutamine synthetase/guanido kinase (From Topology)	T: Glutamine synthetase/guanido kinase	F: Gln-synt_C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.10.20.70	Alpha Beta	Roll	Ubiquitin-like (UB roll)	Glutamine synthetase, N-terminal domain	CATH (4.3.0)
A	3.30.590.10	Alpha Beta	2-Layer Sandwich	Creatine Kinase	Chain A, domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00120	Glutamine synthetase, catalytic domain (Gln-synt_C)	Glutamine synthetase, catalytic domain	-	Domain
A	PF03951	Glutamine synthetase, beta-Grasp domain (Gln-synt_N)	Glutamine synthetase, beta-Grasp domain	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Glutamine synthetase	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding acid-ammonia (or amide) ligase activity ammonia ligase activity glutamine synthetase activity catalytic activity ligase activity, forming carbon-nitrogen bonds ligase activity cation binding metal ion binding	response to nutrient levels cellular homeostasis chemical homeostasis response to stimulus homeostatic process intracellular nitrogen homeostasis nitrogen utilization intracellular chemical homeostasis oxoacid metabolic process amino acid metabolic process organic acid metabolic process alpha-amino acid metabolic process glutamine family amino acid metabolic process glutamate metabolic process response to nutrient levels cellular homeostasis chemical homeostasis response to stimulus homeostatic process intracellular nitrogen homeostasis nitrogen utilization intracellular chemical homeostasis oxoacid metabolic process amino acid metabolic process organic acid metabolic process alpha-amino acid metabolic process glutamine family amino acid metabolic process glutamate metabolic process small molecule metabolic process glutamine metabolic process cellular metabolic process dicarboxylic acid metabolic process carboxylic acid metabolic process primary metabolic process L-amino acid metabolic process proteinogenic amino acid metabolic process ammonia assimilation cycle metabolic process cellular process glutamine family amino acid biosynthetic process cellular biosynthetic process organic acid biosynthetic process carboxylic acid biosynthetic process small molecule biosynthetic process L-amino acid biosynthetic process amino acid biosynthetic process biosynthetic process proteinogenic amino acid biosynthetic process glutamine biosynthetic process alpha-amino acid biosynthetic process	membrane cellular anatomical entity intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR004809	Glutamine synthetase type I	Family
A	IPR008146	Glutamine synthetase, catalytic domain	Domain
A	IPR027303	Glutamine synthetase, glycine-rich site	Conserved Site
A	IPR027302	Glutamine synthetase, N-terminal conserved site	Conserved Site
A	IPR014746	Glutamine synthetase/guanido kinase, catalytic domain	Homologous Superfamily
A	IPR008147	Glutamine synthetase, N-terminal domain	Domain
A	IPR036651	Glutamine synthetase, N-terminal domain superfamily	Homologous Superfamily

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.