Annotations: 6SEC

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Glyco_hydro_2_N	e6secA3	A: beta sandwiches	X: jelly-roll	H: Concanavalin A-like	T: Galactose-binding domain-like	F: Glyco_hydro_2_N	ECOD (1.6)
A	DUF4981	e6secA5	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: DUF4981	ECOD (1.6)
A	UNK_F_TYPE	e6secA4	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: UNK_F_TYPE	ECOD (1.6)
A	Bgal_small_N	e6secA2	A: beta sandwiches	X: Glycosyl hydrolase domain-like	H: supersandwich (From Topology)	T: supersandwich	F: Bgal_small_N	ECOD (1.6)
A	Glyco_hydro_2_C	e6secA1	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: Glyco_hydro_2_C	ECOD (1.6)

Chains	Accession	Name	Description	Comments	Source
A	PF02836	Glycosyl hydrolases family 2, TIM barrel domain (Glyco_hydro_2_C)	Glycosyl hydrolases family 2, TIM barrel domain	This family contains beta-galactosidase, beta-mannosidase and beta-glucuronidase activities.	Domain
A	PF02837	Glycosyl hydrolases family 2, sugar binding domain (Glyco_hydro_2_N)	Glycosyl hydrolases family 2, sugar binding domain	This family contains beta-galactosidase, beta-mannosidase and beta-glucuronidase activities and has a jelly-roll fold. The domain binds the sugar moiety during the sugar-hydrolysis reaction.	Domain
A	PF16353	Beta-galactosidase, domain 4 (LacZ_4)	Beta-galactosidase, domain 4	This entry represents domain 4 found in beta-galactosidase [1] and it is organised in a jelly-roll type barrel (Rutkiewicz-Krotewicz M. et al. Crystals 2018, 8(1), 13, https://doi.org/10.3390/cryst8010013).	Domain
A	PF02929	Beta galactosidase small chain (Bgal_small_N)	Beta galactosidase small chain	This domain comprises the small chain of dimeric beta-galactosidases EC:3.2.1.23. This domain is also found in single chain beta-galactosidase.	Domain

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Beta-galactosidase	binding carbohydrate binding hydrolase activity, acting on glycosyl bonds beta-galactosidase activity hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity catalytic activity galactosidase activity	carbohydrate metabolic process organic substance metabolic process primary metabolic process metabolic process catabolic process organic substance catabolic process	protein-containing complex catalytic complex beta-galactosidase complex

Chains	Accession	Name	Type
A	IPR032312	Beta-galactosidase, domain 4	Domain
A	IPR017853	Glycoside hydrolase superfamily	Homologous Superfamily
A	IPR006101	Glycoside hydrolase, family 2	Family
A	IPR004199	Beta galactosidase small chain/ domain 5	Domain
A	IPR008979	Galactose-binding-like domain superfamily	Homologous Superfamily
A	IPR036156	Beta-Galactosidase/glucuronidase domain superfamily	Homologous Superfamily
A	IPR006104	Glycosyl hydrolases family 2, sugar binding domain	Domain
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR006103	Glycoside hydrolase family 2, catalytic domain	Domain
A	IPR023232	Glycoside hydrolase, family 2, active site	Active Site
A	IPR023230	Glycoside hydrolase, family 2, conserved site	Conserved Site
A	IPR014718	Glycoside hydrolase-type carbohydrate-binding	Homologous Superfamily
A	IPR011013	Galactose mutarotase-like domain superfamily	Homologous Superfamily