Table 1 Common glycosyl hydrolases present in mammalian lactobacilli

Alpha-amylase

3.2.1.1

amyA

Endo-hydrolysis of (1->4)-alpha-D-glucosidic linkages in polysaccharides containing three or more (1->4)-alpha-linked D-glucose units

Starch and sucrose metabolism

[9, 10, 14, 26]

Oligo-1,6-glucosidase

3.2.1.10

malL

Hydrolysis of (1->6)-alpha-D-glucosidic linkages in some oligosaccharides produced from starch and glycogen by EC 3.2.1.1 (alpha-amylase), and in isomaltose

Starch and sucrose metabolism

[9–11, 13, 14, 26]

Maltose-6’-phosphate glucosidase

3.2.1.122

glvA

Hydrolysis of maltose 6’-phosphate

Starch and sucrose metabolism

[18]

Alpha-glucosidase

3.2.1.20

malZ

Hydrolysis of terminal, non-reducing (1->4)-linked alpha-D-glucose residues with release of D-glucose

Galactose, starch and sucrose metabolism

[9–11, 13, 18, 26, 46]

Beta-glucosidase

3.2.1.21

bglX

Hydrolysis of terminal, non-reducing beta-D-glucosyl residues with release of beta-D-glucose

Starch and sucrose metabolism

[9–11, 13, 18, 26]

Alpha-galactosidase

3.2.1.22

rafA

Hydrolysis of terminal, non-reducing alpha-D-galactose residues in alpha-D-galactosides, including galactose oligosaccharides, galactomannans and galactolipids

Galactose metabolism

[9–11, 13, 14, 18, 26, 46]

Beta-galactosidase

3.2.1.23

lacZ

Hydrolysis of terminal non-reducing beta-D-galactose residues in beta-D-galactosides

Galactose metabolism

[9–11, 14, 18, 26, 46]

Beta-fructofuranosidase

3.2.1.26

sacA

Hydrolysis of terminal non-reducing beta-D-fructofuranoside residues in beta-D-fructofuranosides

Galactose, starch and sucrose metabolism

[9–11, 13, 14, 18, 26]

Beta-N-acetylhexosaminidase

3.2.1.52

nagZ

Hydrolysis of terminal non-reducing N-acetyl-D-hexosamine residues in N-acetyl-beta-D-hexosaminides

Amino sugar and nucleotide sugar metabolism

[9, 10, 14, 26]

6-phospho-beta-galactosidase

3.2.1.85

lacG

Hydrolysis of 6-phospho-beta-D-galactosides

Galactose metabolism

[10, 13, 18]

6-phospho-beta-glucosidase

3.2.1.86

bglA

Hydrolysis of 6-phospho-beta-D-glucosyl-(1->4)-D-glucose

Glycolysis

[9–11, 13, 18, 26]

Trehalose-6-phosphate hydrolase

3.2.1.93

treC

Hydrolysis of alpha,alpha-trehalose 6-phosphate

Starch and sucrose metabolism

[10, 11, 13, 14, 18]