sialidase

[si-al´ĭ-dās] 1. an enzyme of the hydrolase class that catalyzes the cleavage of glucosidic linkages between a sialic acid" >sialic acid residue and a hexose" >hexose or hexosamine" >hexosamine residue at the nonreducing terminal of oligosaccharides in glycoproteins, glycolipids, and proteoglycans. Deficiency of it is an autosomal recessive trait and is seen in sialidosis" >sialidosis and galactosialidosis" >galactosialidosis.2. the enzyme with this activity specifically cleaving sialic acid–containing gangliosides; it is deficient in mucolipidosis IV" >mucolipidosis IV. Called also neuraminidase.

si·al·i·dase

(sī-al'i-dās), An enzyme that catalyzes the hydrolysis of terminal acetylneuraminic residues from oligosaccharides, glycoproteins, or glycolipids; present on the surface antigen in myxoviruses; used in histochemistry to selectively remove sialomucins, as from bronchial mucous glands and the small intestine; a deficiency of this enzyme produces sialidosis. Synonym(s): neuraminidase

si·al·i·dase

(sī-al'i-dās) An enzyme that cleaves terminal acylneuraminic residues from 2,3-, 2,6-, and 2,8-linkages in oligosaccharides, glycoproteins, or glycolipids; present as a surface antigen in myxoviruses. Used in histochemistry to selectively remove sialomucins, as from bronchial mucous glands and the small intestine. A deficiency of this enzyme will result in cherry-red-spot myoclonus syndrome (q.v.).

单词	sialidase
释义	DictionarySeeneuraminidaseEncyclopediaSeeNeuraminic Acid sialidase sialidase [si-al´ĭ-dās] 1. an enzyme of the hydrolase class that catalyzes the cleavage of glucosidic linkages between a sialic acid" >sialic acid residue and a hexose" >hexose or hexosamine" >hexosamine residue at the nonreducing terminal of oligosaccharides in glycoproteins, glycolipids, and proteoglycans. Deficiency of it is an autosomal recessive trait and is seen in sialidosis" >sialidosis and galactosialidosis" >galactosialidosis.2. the enzyme with this activity specifically cleaving sialic acid–containing gangliosides; it is deficient in mucolipidosis IV" >mucolipidosis IV. Called also neuraminidase. si·al·i·dase (sī-al'i-dās), An enzyme that catalyzes the hydrolysis of terminal acetylneuraminic residues from oligosaccharides, glycoproteins, or glycolipids; present on the surface antigen in myxoviruses; used in histochemistry to selectively remove sialomucins, as from bronchial mucous glands and the small intestine; a deficiency of this enzyme produces sialidosis. Synonym(s): neuraminidase si·al·i·dase (sī-al'i-dās) An enzyme that cleaves terminal acylneuraminic residues from 2,3-, 2,6-, and 2,8-linkages in oligosaccharides, glycoproteins, or glycolipids; present as a surface antigen in myxoviruses. Used in histochemistry to selectively remove sialomucins, as from bronchial mucous glands and the small intestine. A deficiency of this enzyme will result in cherry-red-spot myoclonus syndrome (q.v.).
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