4TTG

Beta-galactosidase (E. coli) in the presence of potassium chloride.

External Resource: Annotation

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

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d4ttgb2	All beta proteins	Immunoglobulin-like beta-sandwich	beta-Galactosidase/glucuronidase domain	beta-Galactosidase/glucuronidase domain	beta-Galactosidase, domains 2 and 4	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d4ttgb1	All beta proteins	Galactose-binding domain-like	Galactose-binding domain-like	beta-Galactosidase/glucuronidase, N-terminal domain	beta-Galactosidase	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d4ttgb5	All beta proteins	Supersandwich	Galactose mutarotase-like	beta-Galactosidase, domain 5	beta-Galactosidase, domain 5	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
B	d4ttgb3	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	beta-glycanases	beta-Galactosidase, domain 3	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
C	d4ttgc2	All beta proteins	Immunoglobulin-like beta-sandwich	beta-Galactosidase/glucuronidase domain	beta-Galactosidase/glucuronidase domain	beta-Galactosidase, domains 2 and 4	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
C	d4ttgc1	All beta proteins	Galactose-binding domain-like	Galactose-binding domain-like	beta-Galactosidase/glucuronidase, N-terminal domain	beta-Galactosidase	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
C	d4ttgc5	All beta proteins	Supersandwich	Galactose mutarotase-like	beta-Galactosidase, domain 5	beta-Galactosidase, domain 5	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
C	d4ttgc3	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	beta-glycanases	beta-Galactosidase, domain 3	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
D	d4ttgd2	All beta proteins	Immunoglobulin-like beta-sandwich	beta-Galactosidase/glucuronidase domain	beta-Galactosidase/glucuronidase domain	beta-Galactosidase, domains 2 and 4	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
D	d4ttgd1	All beta proteins	Galactose-binding domain-like	Galactose-binding domain-like	beta-Galactosidase/glucuronidase, N-terminal domain	beta-Galactosidase	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
D	d4ttgd5	All beta proteins	Supersandwich	Galactose mutarotase-like	beta-Galactosidase, domain 5	beta-Galactosidase, domain 5	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
D	d4ttgd3	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	beta-glycanases	beta-Galactosidase, domain 3	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d4ttga2	All beta proteins	Immunoglobulin-like beta-sandwich	beta-Galactosidase/glucuronidase domain	beta-Galactosidase/glucuronidase domain	beta-Galactosidase, domains 2 and 4	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d4ttga1	All beta proteins	Galactose-binding domain-like	Galactose-binding domain-like	beta-Galactosidase/glucuronidase, N-terminal domain	beta-Galactosidase	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d4ttga5	All beta proteins	Supersandwich	Galactose mutarotase-like	beta-Galactosidase, domain 5	beta-Galactosidase, domain 5	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d4ttga3	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	(Trans)glycosidases	beta-glycanases	beta-Galactosidase, domain 3	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Glyco_hydro_2_N	e4ttgB4	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	e4ttgB1	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	e4ttgB2	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	e4ttgB3	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	e4ttgB5	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	e4ttgC4	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	e4ttgC5	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	e4ttgC2	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	e4ttgC1	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	e4ttgC3	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	e4ttgD3	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	e4ttgD1	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	e4ttgD5	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	e4ttgD4	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	e4ttgD2	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)
A	Glyco_hydro_2_N	e4ttgA2	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	e4ttgA3	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	e4ttgA5	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	e4ttgA4	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	e4ttgA1	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)
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)
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)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D	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	PF00703	Glycosyl hydrolases family 2 (Glyco_hydro_2)	Glycosyl hydrolases family 2	This family contains beta-galactosidase, beta-mannosidase and beta-glucuronidase activities.	Domain
A, B, C, D	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	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	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	Beta-galactosidase	binding carbohydrate binding cation binding magnesium ion binding ion binding metal ion binding small molecule 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

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR032312	Beta-galactosidase, domain 4	Domain
A, B, C, D	IPR017853	Glycoside hydrolase superfamily	Homologous Superfamily
A, B, C, D	IPR006101	Glycoside hydrolase, family 2	Family
A, B, C, D	IPR004199	Beta galactosidase small chain/ domain 5	Domain
A, B, C, D	IPR008979	Galactose-binding-like domain superfamily	Homologous Superfamily
A, B, C, D	IPR006102	Glycoside hydrolase, family 2, immunoglobulin-like beta-sandwich	Domain
A, B, C, D	IPR036156	Beta-Galactosidase/glucuronidase domain superfamily	Homologous Superfamily
A, B, C, D	IPR006104	Glycosyl hydrolases family 2, sugar binding domain	Domain
A, B, C, D	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, B, C, D	IPR006103	Glycoside hydrolase family 2, catalytic domain	Domain
A, B, C, D	IPR023232	Glycoside hydrolase, family 2, active site	Active Site
A, B, C, D	IPR023230	Glycoside hydrolase, family 2, conserved site	Conserved Site
A, B, C, D	IPR023933	Glycoside hydrolase, family 2, beta-galactosidase	Family
A, B, C, D	IPR014718	Glycoside hydrolase-type carbohydrate-binding	Homologous Superfamily
A, B, C, D	IPR011013	Galactose mutarotase-like domain superfamily	Homologous Superfamily

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
A, B, C, D	CSD	Parent Component: CYS RESID: AA0262 PSI-MOD : L-cysteine sulfinic acid MOD:00267

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Help and Resources

4TTG

Beta-galactosidase (E. coli) in the presence of potassium chloride.

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Domain Annotation: ECOD Classification ECOD Database Homepage

Domain Annotation: CATH CATH Database Homepage

Protein Family Annotation Pfam Database Homepage

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

InterPro: Protein Family Classification InterPro Database Homepage

Protein Modification Annotation