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ENZYME entry: EC 3.2.1.23

Accepted Name
beta-galactosidase.
Alternative Name(s)
exo-(1->4)-beta-D-galactanase.
lactase.
Reaction catalysed
Hydrolysis of terminal non-reducing beta-D-galactose residues in beta-D-galactosides
Comment(s)
Some enzymes in this group hydrolyze alpha-L-arabinosides; some animal enzymes also hydrolyze beta-D-fucosides and beta-D-glucosides (cf. EC 3.2.1.108).
Cross-references
BRENDA3.2.1.23
EC2PDB3.2.1.23
ExplorEnz3.2.1.23
PRIAM enzyme-specific profiles3.2.1.23
KEGG Ligand Database for Enzyme Nomenclature3.2.1.23
IUBMB Enzyme Nomenclature3.2.1.23
IntEnz3.2.1.23
MEDLINEFind literature relating to 3.2.1.23
MetaCyc3.2.1.23
Rhea expert-curated reactions3.2.1.23
UniProtKB/Swiss-Prot
O86372, BDGAL_MYCTU;  Q9FN08, BGA10_ARATH;  Q67VU7, BGA10_ORYSJ;  
Q9SCV1, BGA11_ARATH;  Q6ZJJ0, BGA11_ORYSJ;  Q9SCV0, BGA12_ARATH;  
Q0IZZ8, BGA12_ORYSJ;  Q9SCU9, BGA13_ARATH;  Q7G3T8, BGA13_ORYSJ;  
Q9SCU8, BGA14_ARATH;  Q7XFK2, BGA14_ORYSJ;  Q9C6W4, BGA15_ARATH;  
Q0INM3, BGA15_ORYSJ;  Q8GX69, BGA16_ARATH;  Q93Z24, BGA17_ARATH;  
P06864, BGA2_ECOLI;  A1A3T0, BGAC_BIFAA;  Q9SCW1, BGAL1_ARATH;  
Q44233, BGAL1_ARTSP;  Q65KX8, BGAL1_BACLD;  O31529, BGAL1_BACSU;  
Q54GE1, BGAL1_DICDI;  Q47077, BGAL1_ENTCL;  A6T8X0, BGAL1_KLEP7;  
P06219, BGAL1_KLEPN;  Q5FJ41, BGAL1_LACAC;  Q8RUV9, BGAL1_ORYSJ;  
Q8GEA9, BGAL1_THESP;  Q9LFA6, BGAL2_ARATH;  C7ASJ5, BGAL2_ARTSP;  
Q65CX4, BGAL2_BACLD;  O07012, BGAL2_BACSU;  Q54MV6, BGAL2_DICDI;  
Q2XQU3, BGAL2_ENTCL;  A6TI29, BGAL2_KLEP7;  A7KGA5, BGAL2_KLEPN;  
C6H178, BGAL2_LACAI;  Q8W0A1, BGAL2_ORYSJ;  O54315, BGAL2_THESP;  
Q9SCV9, BGAL3_ARATH;  Q5N8X6, BGAL3_ORYSJ;  Q9SCV8, BGAL4_ARATH;  
A2X2H7, BGAL4_ORYSI;  Q6Z6K4, BGAL4_ORYSJ;  Q9MAJ7, BGAL5_ARATH;  
Q10RB4, BGAL5_ORYSJ;  Q9FFN4, BGAL6_ARATH;  Q10NX8, BGAL6_ORYSJ;  
Q9SCV5, BGAL7_ARATH;  Q75HQ3, BGAL7_ORYSJ;  Q9SCV4, BGAL8_ARATH;  
Q0DGD7, BGAL8_ORYSJ;  Q9SCV3, BGAL9_ARATH;  Q5Z7L0, BGAL9_ORYSJ;  
B0XMP7, BGALA_ASPFC;  B8N6V7, BGALA_ASPFN;  Q4WS33, BGALA_ASPFU;  
A2QAN3, BGALA_ASPNC;  Q2UCU3, BGALA_ASPOR;  Q4ZHV7, BGALA_ASPPH;  
Q5BFC4, BGALA_EMENI;  A1D1Z9, BGALA_NEOFI;  B8QGZ3, BGALA_PENEN;  
Q700S9, BGALA_PENSQ;  B0XNY2, BGALB_ASPFC;  B8NKI4, BGALB_ASPFN;  
Q4WRD3, BGALB_ASPFU;  A2QA64, BGALB_ASPNC;  Q2U6P1, BGALB_ASPOR;  
Q0CMF3, BGALB_ASPTN;  A6RPN7, BGALB_BOTFB;  Q5BEQ0, BGALB_EMENI;  
A1D199, BGALB_NEOFI;  B6GW04, BGALB_PENRW;  B2W791, BGALB_PYRTR;  
A7EBU5, BGALB_SCLS1;  B6QLF0, BGALB_TALMQ;  A1CE56, BGALC_ASPCL;  
B0Y752, BGALC_ASPFC;  B8N2I5, BGALC_ASPFN;  Q4WNE4, BGALC_ASPFU;  
A2QL84, BGALC_ASPNC;  Q2UMD5, BGALC_ASPOR;  A1DM65, BGALC_NEOFI;  
B6H5X9, BGALC_PENRW;  A7EZS5, BGALC_SCLS1;  B6QHA9, BGALC_TALMQ;  
B0XXE7, BGALE_ASPFC;  Q4WG05, BGALE_ASPFU;  A1DJ58, BGALE_NEOFI;  
P70753, BGAL_ACTPL;  A0KQH4, BGAL_AERHH;  C8WV58, BGAL_ALIAD;  
B4S2K9, BGAL_ALTMD;  Q59140, BGAL_ARTSB;  P29853, BGAL_ASPNG;  
P45582, BGAL_ASPOF;  A1A399, BGAL_BIFAA;  D4QFE7, BGAL_BIFB1;  
Q93GI5, BGAL_BIFLI;  Q58D55, BGAL_BOVIN;  P49676, BGAL_BRAOL;  
Q9TRY9, BGAL_CANLF;  Q9RFN0, BGAL_CARML;  A8AKB8, BGAL_CITK8;  
P24131, BGAL_CLOAT;  D9SM34, BGAL_CLOC7;  Q0TUR6, BGAL_CLOP1;  
A7MN76, BGAL_CROS8;  Q00662, BGAL_DIACA;  A7ZI91, BGAL_ECO24;  
B7UJI9, BGAL_ECO27;  Q8X685, BGAL_ECO57;  B5Z2P7, BGAL_ECO5E;  
A7ZWZ1, BGAL_ECOHS;  A1A831, BGAL_ECOK1;  Q0TKT1, BGAL_ECOL5;  
Q8FKG6, BGAL_ECOL6;  B1J0T5, BGAL_ECOLC;  P00722, BGAL_ECOLI;  
B7N8Q1, BGAL_ECOLU;  Q8VNN2, BGAL_ECOLX;  B1LIM9, BGAL_ECOSM;  
Q1RFJ2, BGAL_ECOUT;  A4W7D2, BGAL_ENT38;  A3FEW8, BGAL_ENTAG;  
B2VHN8, BGAL_ERWT9;  O19015, BGAL_FELCA;  P19668, BGAL_GEOKU;  
C9S0R2, BGAL_GEOSY;  Q9K9C6, BGAL_HALH5;  P94804, BGAL_HALL2;  
B9LW38, BGAL_HALLT;  P83252, BGAL_HORVU;  P16278, BGAL_HUMAN;  
B5XQY2, BGAL_KLEP3;  P00723, BGAL_KLULA;  O07684, BGAL_LACAC;  
Q1G9Z4, BGAL_LACDA;  P0C1Y0, BGAL_LACDE;  Q7WTB4, BGAL_LACHE;  
Q48727, BGAL_LACLA;  Q48846, BGAL_LATSK;  Q02603, BGAL_LEULA;  
Q03WL0, BGAL_LEUMM;  Q60HF6, BGAL_MACFA;  P48981, BGAL_MALDO;  
P23780, BGAL_MOUSE;  Q04F24, BGAL_OENOB;  Q6D736, BGAL_PECAS;  
P85412, BGAL_PHODC;  Q6LL68, BGAL_PHOPR;  P81669, BGAL_PINPS;  
Q09HN2, BGAL_PLASL;  Q9KI47, BGAL_PLASS;  Q5R7P4, BGAL_PONAB;  
O52847, BGAL_PRIM3;  P81650, BGAL_PSEHA;  A1SWB8, BGAL_PSYIN;  
O52629, BGAL_PYRWO;  Q59750, BGAL_RHIML;  P30812, BGAL_RHIRD;  
P22498, BGAL_SACS2;  P50388, BGAL_SACSH;  A9MQ82, BGAL_SALAR;  
A8GGN3, BGAL_SERP5;  Q32JB6, BGAL_SHIDS;  Q3Z583, BGAL_SHISS;  
P48980, BGAL_SOLLC;  O33815, BGAL_STAXY;  P23989, BGAL_STRTR;  
P14288, BGAL_SULAC;  Q9X6C6, BGAL_THEBO;  Q56307, BGAL_THEMA;  
P77989, BGAL_THEP3;  O69315, BGAL_THETH;  P26257, BGAL_THETU;  
A5F5U6, BGAL_VIBC3;  Q8D4H3, BGAL_VIBVU;  Q7MG04, BGAL_VIBVY;  
D5JGG0, BGAL_WEICA;  P48982, BGAL_XANMN;  A1JTC4, BGAL_YERE8;  
A7FH78, BGAL_YERP3;  Q1C6T8, BGAL_YERPA;  B2K6E6, BGAL_YERPB;  
Q7CIZ3, BGAL_YERPE;  A9R0J8, BGAL_YERPG;  Q1CI76, BGAL_YERPN;  
A4TLL5, BGAL_YERPP;  Q669R9, BGAL_YERPS;  B1JI86, BGAL_YERPY;  
O07685, BGAM_LACAC;  Q7WTB3, BGAM_LACHE;  Q48847, BGAM_LATSK;  
Q02604, BGAM_LEULA;  A7LXS9, BGH2A_BACO1;  

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All UniProtKB/Swiss-Prot entries referenced in this entry, with possibility to download in different formats, align etc.
All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 3.2.1.-
All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 3.2.-.-
All ENZYME / UniProtKB/Swiss-Prot entries corresponding to 3.-.-.-