Biomaterial Database

Comparison of synthetic and natural glucosylceramides as substrate for glucosylceramidase assay. 1982

A M Vaccaro, and T Kobayashi, and K Suzuki

Commercially available [3H]glucosylceramide is derived from spleen tissue of patients with Gaucher's disease. When such tritiated glucosylceramide was diluted with unlabelled glucosylceramide from different sources and used as the substrate for assays of glucosylceramidase, the apparent activities obtained differed drastically. When diluted with synthetic N-stearoyl- or N-lignoceroyl-glucosyldihydrosphingosine, the release of [3H]glucose was 4-5 times greater than when diluted with unlabelled glucosylceramide from Gaucher spleen, with either brain or fibroblast homogenate as the enzyme source. The Ki values of the synthetic substrates were 15-30 times greater than the Km for the natural mixture, indicating much lower affinity of the synthetic substrates for the enzyme. Although the reason for the reduction in affinity could not be identified, caution is required when the commercial [3H]glucosylceramide is to be diluted with unlabelled glucosylceramide.

UI	MeSH Term	Description	Entries
D007700	Kinetics	The rate dynamics in chemical or physical systems.
D001921	Brain	The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM.	Encephalon
D002554	Cerebrosides	Neutral glycosphingolipids that contain a monosaccharide, normally glucose or galactose, in 1-ortho-beta-glycosidic linkage with the primary alcohol of an N-acyl sphingoid (ceramide). In plants the monosaccharide is normally glucose and the sphingoid usually phytosphingosine. In animals, the monosaccharide is usually galactose, though this may vary with the tissue and the sphingoid is usually sphingosine or dihydrosphingosine. (From Oxford Dictionary of Biochemistry and Molecular Biology, 1st ed)
D005347	Fibroblasts	Connective tissue cells which secrete an extracellular matrix rich in collagen and other macromolecules.	Fibroblast
D005776	Gaucher Disease	An autosomal recessive disorder caused by a deficiency of acid beta-glucosidase (GLUCOSYLCERAMIDASE) leading to intralysosomal accumulation of glycosylceramide mainly in cells of the MONONUCLEAR PHAGOCYTE SYSTEM. The characteristic Gaucher cells, glycosphingolipid-filled HISTIOCYTES, displace normal cells in BONE MARROW and visceral organs causing skeletal deterioration, hepatosplenomegaly, and organ dysfunction. There are several subtypes based on the presence and severity of neurological involvement.	Cerebroside Lipidosis Syndrome,Gaucher Disease Type 1,Gaucher Disease Type 2,Glucocerebrosidase Deficiency Disease,Glucosylceramide Beta-Glucosidase Deficiency Disease,Neuronopathic Gaucher Disease,Acid beta-Glucosidase Deficiency,Acid beta-Glucosidase Deficiency Disease,Acute Neuronopathic Gaucher Disease,Chronic Gaucher Disease,GBA Deficiency,Gaucher Disease Type 3,Gaucher Disease, Acute Neuronopathic,Gaucher Disease, Acute Neuronopathic Type,Gaucher Disease, Chronic,Gaucher Disease, Chronic Neuronopathic Type,Gaucher Disease, Infantile,Gaucher Disease, Infantile Cerebral,Gaucher Disease, Juvenile,Gaucher Disease, Juvenile and Adult, Cerebral,Gaucher Disease, Neuronopathic,Gaucher Disease, Non-Neuronopathic Form,Gaucher Disease, Noncerebral Juvenile,Gaucher Disease, Subacute Neuronopathic Form,Gaucher Disease, Subacute Neuronopathic Type,Gaucher Disease, Type 1,Gaucher Disease, Type 2,Gaucher Disease, Type 3,Gaucher Disease, Type I,Gaucher Disease, Type II,Gaucher Disease, Type III,Gaucher Splenomegaly,Gaucher Syndrome,Gaucher's Disease,Gauchers Disease,Glucocerebrosidase Deficiency,Glucocerebrosidosis,Glucosyl Cerebroside Lipidosis,Glucosylceramidase Deficiency,Glucosylceramide Beta-Glucosidase Deficiency,Glucosylceramide Lipidosis,Infantile Gaucher Disease,Kerasin Histiocytosis,Kerasin Lipoidosis,Kerasin thesaurismosis,Lipoid Histiocytosis (Kerasin Type),Non-Neuronopathic Gaucher Disease,Subacute Neuronopathic Gaucher Disease,Type 1 Gaucher Disease,Type 2 Gaucher Disease,Type 3 Gaucher Disease,Cerebroside Lipidoses, Glucosyl,Cerebroside Lipidosis Syndromes,Cerebroside Lipidosis, Glucosyl,Deficiencies, GBA,Deficiencies, Glucocerebrosidase,Deficiency Disease, Glucocerebrosidase,Deficiency Diseases, Glucocerebrosidase,Deficiency, GBA,Deficiency, Glucocerebrosidase,Disease, Chronic Gaucher,Disease, Gaucher,Disease, Gaucher's,Disease, Gauchers,Disease, Glucocerebrosidase Deficiency,Disease, Infantile Gaucher,Disease, Juvenile Gaucher,Disease, Neuronopathic Gaucher,Disease, Non-Neuronopathic Gaucher,Diseases, Gauchers,Diseases, Glucocerebrosidase Deficiency,GBA Deficiencies,Gaucher Disease, Non Neuronopathic Form,Gaucher Disease, Non-Neuronopathic,Gauchers Diseases,Glucocerebrosidase Deficiencies,Glucocerebrosidase Deficiency Diseases,Glucocerebrosidoses,Glucosyl Cerebroside Lipidoses,Glucosylceramide Lipidoses,Histiocytoses, Kerasin,Histiocytoses, Lipoid (Kerasin Type),Histiocytosis, Kerasin,Histiocytosis, Lipoid (Kerasin Type),Juvenile Gaucher Disease,Kerasin Histiocytoses,Kerasin Lipoidoses,Kerasin thesaurismoses,Lipidoses, Glucosyl Cerebroside,Lipidoses, Glucosylceramide,Lipidosis Syndrome, Cerebroside,Lipidosis Syndromes, Cerebroside,Lipidosis, Glucosyl Cerebroside,Lipidosis, Glucosylceramide,Lipoid Histiocytoses (Kerasin Type),Lipoidoses, Kerasin,Lipoidosis, Kerasin,Non Neuronopathic Gaucher Disease,Splenomegaly, Gaucher,Syndrome, Cerebroside Lipidosis,Syndrome, Gaucher,Syndromes, Cerebroside Lipidosis,thesaurismoses, Kerasin,thesaurismosis, Kerasin
D005947	Glucose	A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement.	Dextrose,Anhydrous Dextrose,D-Glucose,Glucose Monohydrate,Glucose, (DL)-Isomer,Glucose, (alpha-D)-Isomer,Glucose, (beta-D)-Isomer,D Glucose,Dextrose, Anhydrous,Monohydrate, Glucose
D005959	Glucosidases	Enzymes that hydrolyze O-glucosyl-compounds. (Enzyme Nomenclature, 1992) EC 3.2.1.-.	Glucosidase
D005962	Glucosylceramidase	A glycosidase that hydrolyzes a glucosylceramide to yield free ceramide plus glucose. Deficiency of this enzyme leads to abnormally high concentrations of glucosylceramide in the brain in GAUCHER DISEASE. EC 3.2.1.45.	Glucocerebrosidase,Acid beta-Glucosidase,Glucocerebroside beta-Glucosidase,Glucosyl Ceramidase,Glucosylceramide beta-Glucosidase,Glucosylsphingosine Glucosyl Hydrolase,beta-Glucocerebrosidase,Acid beta Glucosidase,Ceramidase, Glucosyl,Glucocerebroside beta Glucosidase,Glucosyl Hydrolase, Glucosylsphingosine,Glucosylceramide beta Glucosidase,Hydrolase, Glucosylsphingosine Glucosyl,beta Glucocerebrosidase,beta-Glucosidase, Acid,beta-Glucosidase, Glucocerebroside,beta-Glucosidase, Glucosylceramide
D005963	Glucosylceramides	Cerebrosides which contain as their polar head group a glucose moiety bound in glycosidic linkage to the hydroxyl group of ceramides. Their accumulation in tissue, due to a defect in beta-glucosidase, is the cause of Gaucher's disease.	Glucocerebroside,Glucocerebrosides,Glucosyl Ceramide,Glucosyl Ceramides,Glucosylceramide,Ceramide, Glucosyl,Ceramides, Glucosyl
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man