Annotations: 1WKV

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1wkva1	Alpha and beta proteins (a/b)	Tryptophan synthase beta subunit-like PLP-dependent enzymes	Tryptophan synthase beta subunit-like PLP-dependent enzymes	Tryptophan synthase beta subunit-like PLP-dependent enzymes	O-acetylserine sulfhydrylase (Cysteine synthase)	(Aeropyrum pernix K1 ) [TaxId: 272557 ],	SCOPe (2.08)
B	d1wkvb_	Alpha and beta proteins (a/b)	Tryptophan synthase beta subunit-like PLP-dependent enzymes	Tryptophan synthase beta subunit-like PLP-dependent enzymes	Tryptophan synthase beta subunit-like PLP-dependent enzymes	O-acetylserine sulfhydrylase (Cysteine synthase)	(Aeropyrum pernix K1 ) [TaxId: 272557 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Tryptophan synthase beta subunit-like PLP-dependent enzymes	8020783	4000798	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Tryptophan synthase beta subunit-like PLP-dependent enzymes	8033163	3001427	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Tryptophan synthase beta subunit-like PLP-dependent enzymes	8033163	3001427	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	F_UNCLASSIFIED	e1wkvA1	A: a+b complex topology	X: ParB/Sulfiredoxin (From Topology)	H: ParB/Sulfiredoxin (From Topology)	T: ParB/Sulfiredoxin	F: F_UNCLASSIFIED	ECOD (1.6)
A	PF00291	e1wkvA2	A: a/b three-layered sandwiches	X: Rossmann-like	H: Tryptophan synthase beta subunit-like PLP-dependent enzymes (From Topology)	T: Tryptophan synthase beta subunit-like PLP-dependent enzymes	F: PF00291	ECOD (1.6)
B	F_UNCLASSIFIED	e1wkvB1	A: a+b complex topology	X: ParB/Sulfiredoxin (From Topology)	H: ParB/Sulfiredoxin (From Topology)	T: ParB/Sulfiredoxin	F: F_UNCLASSIFIED	ECOD (1.6)
B	PF00291	e1wkvB2	A: a/b three-layered sandwiches	X: Rossmann-like	H: Tryptophan synthase beta subunit-like PLP-dependent enzymes (From Topology)	T: Tryptophan synthase beta subunit-like PLP-dependent enzymes	F: PF00291	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.90.1530.20	Alpha Beta	Alpha-Beta Complex	Conserved hypothetical protein from pyrococcus furiosus pfu- 392566-001, ParB domain		CATH (4.3.0)
A	3.40.50.1100	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold		CATH (4.3.0)
B	3.90.1530.20	Alpha Beta	Alpha-Beta Complex	Conserved hypothetical protein from pyrococcus furiosus pfu- 392566-001, ParB domain		CATH (4.3.0)
B	3.40.50.1100	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00291	Pyridoxal-phosphate dependent enzyme (PALP)	Pyridoxal-phosphate dependent enzyme	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	cysteine synthase	cysteine synthase activity transferase activity transferase activity, transferring alkyl or aryl (other than methyl) groups catalytic activity cystathionine beta-synthase activity hydro-lyase activity lyase activity carbon-oxygen lyase activity O-phosphoserine sulfhydrylase activity	serine family amino acid metabolic process oxoacid metabolic process cellular biosynthetic process sulfur amino acid metabolic process organonitrogen compound biosynthetic process amino acid metabolic process organic acid biosynthetic process organic acid metabolic process alpha-amino acid metabolic process carboxylic acid biosynthetic process cysteine biosynthetic process organic substance metabolic process organic substance biosynthetic process small molecule metabolic process serine family amino acid metabolic process oxoacid metabolic process cellular biosynthetic process sulfur amino acid metabolic process organonitrogen compound biosynthetic process amino acid metabolic process organic acid biosynthetic process organic acid metabolic process alpha-amino acid metabolic process carboxylic acid biosynthetic process cysteine biosynthetic process organic substance metabolic process organic substance biosynthetic process small molecule metabolic process sulfur compound metabolic process organonitrogen compound metabolic process cysteine biosynthetic process from serine small molecule biosynthetic process cellular metabolic process carboxylic acid metabolic process primary metabolic process L-amino acid biosynthetic process L-serine metabolic process L-amino acid metabolic process cysteine metabolic process proteinogenic amino acid metabolic process amino acid biosynthetic process sulfur compound biosynthetic process biosynthetic process proteinogenic amino acid biosynthetic process metabolic process cellular process serine family amino acid biosynthetic process sulfur amino acid biosynthetic process alpha-amino acid biosynthetic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR036052	Tryptophan synthase beta chain-like, PALP domain superfamily	Homologous Superfamily
A, B	IPR001926	Tryptophan synthase beta chain-like, PALP domain	Domain
A, B	IPR001216	Cysteine synthase/cystathionine beta-synthase, pyridoxal-phosphate attachment site	Binding Site

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.