1YQ2

beta-galactosidase from Arthrobacter sp. C2-2 (isoenzyme C2-2-1)

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1yq2a1	All beta proteins	Immunoglobulin-like beta-sandwich	beta-Galactosidase/glucuronidase domain	beta-Galactosidase/glucuronidase domain	beta-Galactosidase, domains 2 and 4	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
A	d1yq2a3	All beta proteins	Galactose-binding domain-like	Galactose-binding domain-like	beta-Galactosidase/glucuronidase, N-terminal domain	beta-Galactosidase	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
A	d1yq2a4	All beta proteins	Supersandwich	Galactose mutarotase-like	beta-Galactosidase, domain 5	beta-Galactosidase, domain 5	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
A	d1yq2a5	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	beta-glycanases	beta-Galactosidase, domain 3	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
B	d1yq2b1	All beta proteins	Immunoglobulin-like beta-sandwich	beta-Galactosidase/glucuronidase domain	beta-Galactosidase/glucuronidase domain	beta-Galactosidase, domains 2 and 4	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
B	d1yq2b3	All beta proteins	Galactose-binding domain-like	Galactose-binding domain-like	beta-Galactosidase/glucuronidase, N-terminal domain	beta-Galactosidase	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
B	d1yq2b4	All beta proteins	Supersandwich	Galactose mutarotase-like	beta-Galactosidase, domain 5	beta-Galactosidase, domain 5	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
B	d1yq2b5	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	beta-glycanases	beta-Galactosidase, domain 3	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
C	d1yq2c1	All beta proteins	Immunoglobulin-like beta-sandwich	beta-Galactosidase/glucuronidase domain	beta-Galactosidase/glucuronidase domain	beta-Galactosidase, domains 2 and 4	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
C	d1yq2c3	All beta proteins	Galactose-binding domain-like	Galactose-binding domain-like	beta-Galactosidase/glucuronidase, N-terminal domain	beta-Galactosidase	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
C	d1yq2c4	All beta proteins	Supersandwich	Galactose mutarotase-like	beta-Galactosidase, domain 5	beta-Galactosidase, domain 5	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
C	d1yq2c5	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	beta-glycanases	beta-Galactosidase, domain 3	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
D	d1yq2d1	All beta proteins	Immunoglobulin-like beta-sandwich	beta-Galactosidase/glucuronidase domain	beta-Galactosidase/glucuronidase domain	beta-Galactosidase, domains 2 and 4	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
D	d1yq2d3	All beta proteins	Galactose-binding domain-like	Galactose-binding domain-like	beta-Galactosidase/glucuronidase, N-terminal domain	beta-Galactosidase	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
D	d1yq2d4	All beta proteins	Supersandwich	Galactose mutarotase-like	beta-Galactosidase, domain 5	beta-Galactosidase, domain 5	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
D	d1yq2d5	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	beta-glycanases	beta-Galactosidase, domain 3	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
E	d1yq2e1	All beta proteins	Immunoglobulin-like beta-sandwich	beta-Galactosidase/glucuronidase domain	beta-Galactosidase/glucuronidase domain	beta-Galactosidase, domains 2 and 4	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
E	d1yq2e3	All beta proteins	Galactose-binding domain-like	Galactose-binding domain-like	beta-Galactosidase/glucuronidase, N-terminal domain	beta-Galactosidase	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
E	d1yq2e4	All beta proteins	Supersandwich	Galactose mutarotase-like	beta-Galactosidase, domain 5	beta-Galactosidase, domain 5	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
E	d1yq2e5	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	beta-glycanases	beta-Galactosidase, domain 3	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
F	d1yq2f1	All beta proteins	Immunoglobulin-like beta-sandwich	beta-Galactosidase/glucuronidase domain	beta-Galactosidase/glucuronidase domain	beta-Galactosidase, domains 2 and 4	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
F	d1yq2f3	All beta proteins	Galactose-binding domain-like	Galactose-binding domain-like	beta-Galactosidase/glucuronidase, N-terminal domain	beta-Galactosidase	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
F	d1yq2f4	All beta proteins	Supersandwich	Galactose mutarotase-like	beta-Galactosidase, domain 5	beta-Galactosidase, domain 5	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)
F	d1yq2f5	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	beta-glycanases	beta-Galactosidase, domain 3	(Arthrobacter sp. C2-2 ) [TaxId: 192168 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	beta-Galactosidase N-terminal domain-like	8022457	4002476	SCOP2 (2022-06-29)
A	SCOP2 Family	beta-galactosidase, domain 5	8022458	4002767	SCOP2 (2022-06-29)
A	SCOP2 Family	beta-glycanases	8022459	4003164	SCOP2 (2022-06-29)
A	SCOP2 Family	beta-Galactosidase/glucuronidase domain	8055210	4007531	SCOP2 (2022-06-29)
A	SCOP2 Family	beta-Galactosidase/glucuronidase domain	8055463	4007531	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	galactose-binding domain-like	8034837	3000087	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Galactose mutarotase-like	8034838	3000035	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	(Trans)glycosidases	8034839	3000313	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	beta-Galactosidase/glucuronidase domain-like	8055211	3002047	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	beta-Galactosidase/glucuronidase domain-like	8055464	3002047	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	beta-Galactosidase/glucuronidase domain-like	8055211	3002047	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	galactose-binding domain-like	8034837	3000087	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	(Trans)glycosidases	8034839	3000313	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Galactose mutarotase-like	8034838	3000035	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	beta-Galactosidase/glucuronidase domain-like	8055464	3002047	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	(Trans)glycosidases	8034839	3000313	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Galactose mutarotase-like	8034838	3000035	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	beta-Galactosidase/glucuronidase domain-like	8055211	3002047	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	galactose-binding domain-like	8034837	3000087	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	beta-Galactosidase/glucuronidase domain-like	8055464	3002047	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	(Trans)glycosidases	8034839	3000313	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	galactose-binding domain-like	8034837	3000087	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	beta-Galactosidase/glucuronidase domain-like	8055211	3002047	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	beta-Galactosidase/glucuronidase domain-like	8055464	3002047	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Galactose mutarotase-like	8034838	3000035	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	(Trans)glycosidases	8034839	3000313	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	beta-Galactosidase/glucuronidase domain-like	8055211	3002047	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	galactose-binding domain-like	8034837	3000087	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	beta-Galactosidase/glucuronidase domain-like	8055464	3002047	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Galactose mutarotase-like	8034838	3000035	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	beta-Galactosidase/glucuronidase domain-like	8055464	3002047	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	galactose-binding domain-like	8034837	3000087	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	(Trans)glycosidases	8034839	3000313	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	beta-Galactosidase/glucuronidase domain-like	8055211	3002047	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Galactose mutarotase-like	8034838	3000035	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	Glyco_hydro_2_N	e1yq2A1	A: beta sandwiches	X: jelly-roll	H: Concanavalin A-like	T: Galactose-binding domain-like	F: Glyco_hydro_2_N	ECOD (1.6)
A	Glyco_hydro_2	e1yq2A3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Glyco_hydro_2	ECOD (1.6)
A	DUF4981	e1yq2A2	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	Bgal_small_N	e1yq2A4	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	e1yq2A5	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)
B	Glyco_hydro_2_N	e1yq2B1	A: beta sandwiches	X: jelly-roll	H: Concanavalin A-like	T: Galactose-binding domain-like	F: Glyco_hydro_2_N	ECOD (1.6)
B	Glyco_hydro_2	e1yq2B3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Glyco_hydro_2	ECOD (1.6)
B	DUF4981	e1yq2B2	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)
B	Bgal_small_N	e1yq2B4	A: beta sandwiches	X: Glycosyl hydrolase domain-like	H: supersandwich (From Topology)	T: supersandwich	F: Bgal_small_N	ECOD (1.6)
B	Glyco_hydro_2_C	e1yq2B5	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)
C	Glyco_hydro_2_N	e1yq2C1	A: beta sandwiches	X: jelly-roll	H: Concanavalin A-like	T: Galactose-binding domain-like	F: Glyco_hydro_2_N	ECOD (1.6)
C	Glyco_hydro_2	e1yq2C3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Glyco_hydro_2	ECOD (1.6)
C	DUF4981	e1yq2C2	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)
C	Bgal_small_N	e1yq2C4	A: beta sandwiches	X: Glycosyl hydrolase domain-like	H: supersandwich (From Topology)	T: supersandwich	F: Bgal_small_N	ECOD (1.6)
C	Glyco_hydro_2_C	e1yq2C5	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)
D	Glyco_hydro_2_N	e1yq2D1	A: beta sandwiches	X: jelly-roll	H: Concanavalin A-like	T: Galactose-binding domain-like	F: Glyco_hydro_2_N	ECOD (1.6)
D	Glyco_hydro_2	e1yq2D3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Glyco_hydro_2	ECOD (1.6)
D	DUF4981	e1yq2D2	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)
D	Bgal_small_N	e1yq2D4	A: beta sandwiches	X: Glycosyl hydrolase domain-like	H: supersandwich (From Topology)	T: supersandwich	F: Bgal_small_N	ECOD (1.6)
D	Glyco_hydro_2_C	e1yq2D5	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)
E	Glyco_hydro_2_N	e1yq2E1	A: beta sandwiches	X: jelly-roll	H: Concanavalin A-like	T: Galactose-binding domain-like	F: Glyco_hydro_2_N	ECOD (1.6)
E	Glyco_hydro_2	e1yq2E3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Glyco_hydro_2	ECOD (1.6)
E	DUF4981	e1yq2E2	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)
E	Bgal_small_N	e1yq2E4	A: beta sandwiches	X: Glycosyl hydrolase domain-like	H: supersandwich (From Topology)	T: supersandwich	F: Bgal_small_N	ECOD (1.6)
E	Glyco_hydro_2_C	e1yq2E5	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)
F	Glyco_hydro_2_N	e1yq2F1	A: beta sandwiches	X: jelly-roll	H: Concanavalin A-like	T: Galactose-binding domain-like	F: Glyco_hydro_2_N	ECOD (1.6)
F	Glyco_hydro_2	e1yq2F3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Glyco_hydro_2	ECOD (1.6)
F	DUF4981	e1yq2F2	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)
F	Bgal_small_N	e1yq2F4	A: beta sandwiches	X: Glycosyl hydrolase domain-like	H: supersandwich (From Topology)	T: supersandwich	F: Bgal_small_N	ECOD (1.6)
F	Glyco_hydro_2_C	e1yq2F5	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)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.120.260	Mainly Beta	Sandwich	Jelly Rolls	Galactose-binding domain-like	CATH (4.3.0)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A	3.20.20.80	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Glycosidases	CATH (4.3.0)
A	2.70.98.10	Mainly Beta	Distorted Sandwich	Beta-galactosidase	Chain A, domain 5	CATH (4.3.0)
B	2.60.120.260	Mainly Beta	Sandwich	Jelly Rolls	Galactose-binding domain-like	CATH (4.3.0)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B	3.20.20.80	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Glycosidases	CATH (4.3.0)
B	2.70.98.10	Mainly Beta	Distorted Sandwich	Beta-galactosidase	Chain A, domain 5	CATH (4.3.0)
C	2.60.120.260	Mainly Beta	Sandwich	Jelly Rolls	Galactose-binding domain-like	CATH (4.3.0)
C	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C	3.20.20.80	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Glycosidases	CATH (4.3.0)
C	2.70.98.10	Mainly Beta	Distorted Sandwich	Beta-galactosidase	Chain A, domain 5	CATH (4.3.0)
D	2.60.120.260	Mainly Beta	Sandwich	Jelly Rolls	Galactose-binding domain-like	CATH (4.3.0)
D	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
D	3.20.20.80	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Glycosidases	CATH (4.3.0)
D	2.70.98.10	Mainly Beta	Distorted Sandwich	Beta-galactosidase	Chain A, domain 5	CATH (4.3.0)
E	2.60.120.260	Mainly Beta	Sandwich	Jelly Rolls	Galactose-binding domain-like	CATH (4.3.0)
E	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
E	3.20.20.80	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Glycosidases	CATH (4.3.0)
E	2.70.98.10	Mainly Beta	Distorted Sandwich	Beta-galactosidase	Chain A, domain 5	CATH (4.3.0)
F	2.60.120.260	Mainly Beta	Sandwich	Jelly Rolls	Galactose-binding domain-like	CATH (4.3.0)
F	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
F	3.20.20.80	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Glycosidases	CATH (4.3.0)
F	2.70.98.10	Mainly Beta	Distorted Sandwich	Beta-galactosidase	Chain A, domain 5	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E A, B, C, D, E, F	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, B, C, D, E A, B, C, D, E, F	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, B, C, D, E A, B, C, D, E, F	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, B, C, D, E A, B, C, D, E, F	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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E A, B, C, D, E, F	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 cation binding ion binding metal ion binding small molecule binding	carbohydrate metabolic process catabolic process oligosaccharide catabolic process oligosaccharide metabolic process lactose catabolic process carbohydrate catabolic process primary metabolic process disaccharide metabolic process lactose metabolic process metabolic process disaccharide catabolic process	protein-containing complex catalytic complex beta-galactosidase complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E A, B, C, D, E, F	IPR032312	Beta-galactosidase, domain 4	Domain
A, B, C, D, E A, B, C, D, E, F	IPR017853	Glycoside hydrolase superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F	IPR006101	Glycoside hydrolase, family 2	Family
A, B, C, D, E A, B, C, D, E, F	IPR004199	Beta galactosidase small chain/ domain 5	Domain
A, B, C, D, E A, B, C, D, E, F	IPR008979	Galactose-binding-like domain superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F	IPR036156	Beta-Galactosidase/glucuronidase domain superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F	IPR006104	Glycosyl hydrolases family 2, sugar binding domain	Domain
A, B, C, D, E A, B, C, D, E, F	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F	IPR006103	Glycoside hydrolase family 2, catalytic domain	Domain
A, B, C, D, E A, B, C, D, E, F	IPR023232	Glycoside hydrolase, family 2, active site	Active Site
A, B, C, D, E A, B, C, D, E, F	IPR023230	Glycoside hydrolase, family 2, conserved site	Conserved Site
A, B, C, D, E A, B, C, D, E, F	IPR014718	Glycoside hydrolase-type carbohydrate-binding	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F	IPR050347	Bacterial Beta-galactosidase	Family
A, B, C, D, E A, B, C, D, E, F	IPR011013	Galactose mutarotase-like domain superfamily	Homologous Superfamily