Annotations: 1B4U

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1b4ua_	All alpha proteins	LigA subunit of an aromatic-ring-opening dioxygenase LigAB	LigA subunit of an aromatic-ring-opening dioxygenase LigAB	LigA subunit of an aromatic-ring-opening dioxygenase LigAB	LigA subunit of an aromatic-ring-opening dioxygenase LigAB	(Sphingomonas paucimobilis ) [TaxId: 13689 ],	SCOPe (2.08)
C	d1b4uc_	All alpha proteins	LigA subunit of an aromatic-ring-opening dioxygenase LigAB	LigA subunit of an aromatic-ring-opening dioxygenase LigAB	LigA subunit of an aromatic-ring-opening dioxygenase LigAB	LigA subunit of an aromatic-ring-opening dioxygenase LigAB	(Sphingomonas paucimobilis ) [TaxId: 13689 ],	SCOPe (2.08)
D	d1b4ud_	Alpha and beta proteins (a/b)	Phosphorylase/hydrolase-like	LigB-like	LigB-like	LigB subunit of an aromatic-ring-opening dioxygenase LigAB	(Sphingomonas paucimobilis ) [TaxId: 13689 ],	SCOPe (2.08)
B	d1b4ub_	Alpha and beta proteins (a/b)	Phosphorylase/hydrolase-like	LigB-like	LigB-like	LigB subunit of an aromatic-ring-opening dioxygenase LigAB	(Sphingomonas paucimobilis ) [TaxId: 13689 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	LigA subunit of an aromatic-ring-opening dioxygenase LigAB	8038079	3000805	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	LigA subunit of an aromatic-ring-opening dioxygenase LigAB	8038079	3000805	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	LigB-like	8032208	3000690	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	LigB-like	8032208	3000690	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	LigA	e1b4uA1	A: alpha arrays	X: LigA subunit of an aromatic-ring-opening dioxygenase LigAB (From Topology)	H: LigA subunit of an aromatic-ring-opening dioxygenase LigAB (From Topology)	T: LigA subunit of an aromatic-ring-opening dioxygenase LigAB	F: LigA	ECOD (1.6)
C	LigA	e1b4uC1	A: alpha arrays	X: LigA subunit of an aromatic-ring-opening dioxygenase LigAB (From Topology)	H: LigA subunit of an aromatic-ring-opening dioxygenase LigAB (From Topology)	T: LigA subunit of an aromatic-ring-opening dioxygenase LigAB	F: LigA	ECOD (1.6)
D	LigB	e1b4uD1	A: a/b three-layered sandwiches	X: LigB-like (From Topology)	H: LigB-like (From Topology)	T: LigB-like	F: LigB	ECOD (1.6)
B	LigB	e1b4uB1	A: a/b three-layered sandwiches	X: LigB-like (From Topology)	H: LigB-like (From Topology)	T: LigB-like	F: LigB	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.700.10	Mainly Alpha	Orthogonal Bundle	Protocatechuate 4,5-dioxygenase	Chain A	CATH (4.3.0)
C	1.10.700.10	Mainly Alpha	Orthogonal Bundle	Protocatechuate 4,5-dioxygenase	Chain A	CATH (4.3.0)
D	3.40.830.10	Alpha Beta	3-Layer(aba) Sandwich	Protocatechuate 4,5-dioxygenase	Chain B	CATH (4.3.0)
B	3.40.830.10	Alpha Beta	3-Layer(aba) Sandwich	Protocatechuate 4,5-dioxygenase	Chain B	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C	PF07746	Aromatic-ring-opening dioxygenase LigAB, LigA subunit (LigA)	Aromatic-ring-opening dioxygenase LigAB, LigA subunit	-	Family
B, D	PF02900	Catalytic LigB subunit of aromatic ring-opening dioxygenase (LigB)	Catalytic LigB subunit of aromatic ring-opening dioxygenase	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C	PROTOCATECHUATE 4,5-DIOXYGENASE	oxidoreductase activity, acting on single donors with incorporation of molecular oxygen, incorporation of two atoms of oxygen oxidoreductase activity oxidoreductase activity, acting on single donors with incorporation of molecular oxygen catalytic activity protocatechuate 4,5-dioxygenase activity dioxygenase activity	catabolic process metabolic process	-
B, D	PROTOCATECHUATE 4,5-DIOXYGENASE	oxidoreductase activity, acting on single donors with incorporation of molecular oxygen, incorporation of two atoms of oxygen oxidoreductase activity oxidoreductase activity, acting on single donors with incorporation of molecular oxygen catalytic activity protocatechuate 4,5-dioxygenase activity dioxygenase activity cation binding transition metal ion binding iron ion binding ion binding binding ferrous iron binding metal ion binding small molecule binding	catabolic process metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C	IPR011986	Extradiol ring-cleavage dioxygenase LigAB, LigA subunit	Domain
A, C	IPR014159	Protocatechuate 4,5-dioxygenase, alpha subunit	Family
A, C	IPR036622	Dioxygenase LigAB, LigA subunit superfamily	Homologous Superfamily
B, D	IPR034937	Protocatechuate 4,5-dioxygenase beta chain	Family
B, D	IPR004183	Extradiol ring-cleavage dioxygenase, class III enzyme, subunit B	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.