3LN6

Crystal structure of a bifunctional glutathione synthetase from Streptococcus agalactiae

External Resource: Annotation

Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PF04262	e3ln6A3	A: a+b two layers	X: Glutamine synthetase-like	H: Glutamine synthetase/guanido kinase (From Topology)	T: Glutamine synthetase/guanido kinase	F: PF04262	ECOD (1.6)
A	PF08443	e3ln6A1	A: a+b complex topology	X: Protein kinase/SAICAR synthase/ATP-grasp (From Homology)	H: Protein kinase/SAICAR synthase/ATP-grasp	T: ATP-grasp	F: PF08443	ECOD (1.6)
A	PF18419	e3ln6A2	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: PreATP-grasp domain	F: PF18419	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.590.20	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	PF01071	Phosphoribosylglycinamide synthetase, ATP-grasp (A) domain (GARS_A)	Phosphoribosylglycinamide synthetase, ATP-grasp (A) domain	Phosphoribosylglycinamide synthetase catalyses the second step in the de novo biosynthesis of purine. The reaction catalysed by Phosphoribosylglycinamide synthetase is the ATP- dependent addition of 5-phosphoribosylamine to glycine to form 5'phospho ...	Phosphoribosylglycinamide synthetase catalyses the second step in the de novo biosynthesis of purine. The reaction catalysed by Phosphoribosylglycinamide synthetase is the ATP- dependent addition of 5-phosphoribosylamine to glycine to form 5'phosphoribosylglycinamide. This domain is related to the ATP-grasp domain of biotin carboxylase/carbamoyl phosphate synthetase (see Pfam:PF02786).	Domain
A	PF04262	Glutamate-cysteine ligase (Glu_cys_ligase)	Glutamate-cysteine ligase	-	Family
A	PF18419	ATP-grasp-like domain (ATP-grasp_6)	ATP-grasp-like domain	Glutathione biosynthesis is achieved in most organisms via a conserved two-step approach relying on the capacity of two independent and unrelated ligases to perform peptide synthesis coupled to ATP hydrolysis. In a first and rate-limiting step, gamma ...	Glutathione biosynthesis is achieved in most organisms via a conserved two-step approach relying on the capacity of two independent and unrelated ligases to perform peptide synthesis coupled to ATP hydrolysis. In a first and rate-limiting step, gamma-glutamylcysteine ligase (gamma-ECL) (or GshA; EC:6.3.2.2) uses l-glutamate and l-cysteine to form gamma-glutamylcysteine (gamma-EC), which, in a second step, is condensed with glycine to glutathione by glutathione synthetase (GS) (or GshB; EC:6.3.2.3). However, several pathogenic and free-living bacteria carry out glutathione biosynthesis based on a single enzyme that catalyzes both the gamma-ECL and the GS reactions. Such bifunctional glutathione-synthesizing enzymes have been termed gamma-GCS-GS or GshF [1]. Hybrid GshF contains a typical gamma-proteobacterial gamma-ECL fused to an ATP-grasp-like domain [2]. The ATP-grasp-like module is responsible for the ensuing formation of glutathione from gamma-glutamylcysteine and glycine. The ATP-grasp-like domain has an antiparallel beta-sheet in the GshF structures in contrast to all structurally characterized members of the ATP-grasp superfamily [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Glutathione biosynthesis bifunctional protein gshAB	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-amino acid ligase activity glutathione synthase activity non-ribosomal peptide synthetase activity catalytic activity ligase activity, forming carbon-nitrogen bonds ligase activity glutamate-cysteine ligase activity cation binding metal ion binding	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR011761	ATP-grasp fold	Domain
A	IPR006335	Glutathione biosynthesis bifunctional protein GshAB	Family
A	IPR006334	Glutamate--cysteine ligase, monofunctional	Family
A	IPR040657	GshAB, ATP-grasp-like domain	Domain
A	IPR007370	Glutamate--cysteine ligase	Domain
A	IPR020561	Phosphoribosylglycinamide synthetase, ATP-grasp (A) domain	Domain
A	IPR014746	Glutamine synthetase/guanido kinase, catalytic domain	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 R01GM133198.