Annotations: 3O98

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Glutathione synthetase ATP-binding domain-like	8042818	3000094	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Glutathione synthetase ATP-binding domain-like	8042818	3000094	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	PreATP-grasp domain	8042817	3001680	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Cysteine proteinases	8042819	3001808	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	PreATP-grasp domain	8042817	3001680	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Glutathione synthetase ATP-binding domain-like	8042818	3000094	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Glutathione synthetase ATP-binding domain-like	8042818	3000094	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Cysteine proteinases	8042819	3001808	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	GSP_synth_1st	e3o98A1	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: GSP_synth_1st	ECOD (1.6)
A	CHAP	e3o98A2	A: a+b complex topology	X: Cysteine proteinases-like	H: Cysteine proteinases (From Topology)	T: Cysteine proteinases	F: CHAP	ECOD (1.6)
A	GSP_synth_2nd	e3o98A3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: PreATP-grasp domain	F: GSP_synth_2nd	ECOD (1.6)
B	GSP_synth_1st	e3o98B1	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: GSP_synth_1st	ECOD (1.6)
B	CHAP	e3o98B2	A: a+b complex topology	X: Cysteine proteinases-like	H: Cysteine proteinases (From Topology)	T: Cysteine proteinases	F: CHAP	ECOD (1.6)
B	GSP_synth_2nd	e3o98B3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: PreATP-grasp domain	F: GSP_synth_2nd	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.90.1720.10	Alpha Beta	Alpha-Beta Complex	endopeptidase fold (from Nostoc punctiforme)	endopeptidase domain like (from Nostoc punctiforme)	CATH (4.3.0)
B	3.90.1720.10	Alpha Beta	Alpha-Beta Complex	endopeptidase fold (from Nostoc punctiforme)	endopeptidase domain like (from Nostoc punctiforme)	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF03738	Glutathionylspermidine synthase preATP-grasp (GSP_synth)	Glutathionylspermidine synthase preATP-grasp	This region contains the Glutathionylspermidine synthase enzymatic activity EC:6.3.1.8. This is the C-terminal region in bi-enzymes such as Swiss:P43675. Glutathionylspermidine (GSP) synthetases of Trypanosomatidae and Escherichia coli couple hydroly ...	This region contains the Glutathionylspermidine synthase enzymatic activity EC:6.3.1.8. This is the C-terminal region in bi-enzymes such as Swiss:P43675. Glutathionylspermidine (GSP) synthetases of Trypanosomatidae and Escherichia coli couple hydrolysis of ATP (to ADP and Pi) with formation of an amide bond between spermidine and the glycine carboxylate of glutathione (gamma-Glu-Cys-Gly). In the pathogenic trypanosomatids, this reaction is the penultimate step in the biosynthesis of the antioxidant metabolite, trypanothione (N1,N8-bis-(glutathionyl)spermidine), and is a target for drug design [1]. This region, the pre-ATP grasp region, probably carries the substrate-binding site [2].	Domain
A, B	PF05257	CHAP domain (CHAP)	CHAP domain	This domain corresponds to an amidase function. Many of these proteins are involved in cell wall metabolism of bacteria. This domain is found at the N-terminus of Swiss:P43675, where it functions as a glutathionylspermidine amidase EC:3.5.1.78 [1]. ...	This domain corresponds to an amidase function. Many of these proteins are involved in cell wall metabolism of bacteria. This domain is found at the N-terminus of Swiss:P43675, where it functions as a glutathionylspermidine amidase EC:3.5.1.78 [1]. This domain is found to be the catalytic domain of PlyCA [4]. CHAP is the amidase domain of bifunctional Escherichia coli glutathionylspermidine synthetase/amidase, and it catalyses the hydrolysis of Gsp (glutathionylspermidine) into glutathione and spermidine [5].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Bifunctional glutathionylspermidine synthetase/amidase	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 glutathionylspermidine amidase activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in linear amides hydrolase activity catalytic activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds acid-ammonia (or amide) ligase activity glutathionylspermidine synthase activity ligase activity, forming carbon-nitrogen bonds ligase activity cation binding metal ion binding	spermidine metabolic process amine metabolic process metabolic process polyamine metabolic process biogenic amine metabolic process glutathione metabolic process cellular metabolic process sulfur compound metabolic process cellular process amide metabolic process cellular modified amino acid metabolic process	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR016185	Pre-ATP-grasp domain superfamily	Homologous Superfamily
A, B	IPR007921	CHAP domain	Domain
A, B	IPR051705	Glutathionylspermidine Synthetase/Amidase	Family
A, B	IPR038765	Papain-like cysteine peptidase superfamily	Homologous Superfamily
A, B	IPR005494	Glutathionylspermidine synthase, pre-ATP-grasp-like domain	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 R01GM157729.