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Lactosylceramide
The Lactosylceramides, also known as LacCer, are a class of glycosphingolipids composed of a variable hydrophobic ceramide lipid and a hydrophilic sugar moiety. Lactosylceramides are found in microdomains on the plasma layers of numerous cells. Moreover, they are a type of ceramide including lactose, which is an example of a globoside. The chemical formula of Lactosylceramide is C42H79NO13, which has 806.088 g/mol of molar mass. Moreover, The IUPAC name of LacCer is N-(dodecanoyl)-1-beta-lactosyl-sphing-4-enine. Lactosylceramides were initially called 'cytolipin H'. It is found in small amounts just in most creature tissues, however, it has various huge organic capacities and it is of extraordinary significance as the biosynthetic forerunner of the greater part of the impartial oligoglycosylceramides, sulfatides and gangliosides. In creature tissues, biosynthesis of lactosylceramide includes expansion of the second monosaccharides unit (galactose) as its nucleotide subsidiary to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ST3GAL5
Lactosylceramide alpha-2,3-sialyltransferase is an enzyme that in humans is encoded by the ''ST3GAL5'' gene. Ganglioside GM3 is known to participate in the induction of cell differentiation, modulation of cell proliferation, maintenance of fibroblast morphology, signal transduction, and integrin-mediated cell adhesion. The protein encoded by this gene is a type II membrane protein which catalyzes the formation of GM3 using lactosylceramide as the substrate. The encoded protein is a member of glycosyltransferase family 29 and may be localized to the Golgi apparatus. Mutation in this gene has been associated with Amish infantile epilepsy syndrome. Transcript variants encoding different isoforms have been found for this gene. Mutations in this gene have also been associated to ‘Salt & Pepper’ syndrome: an autosomal recessive condition characterized by severe intellectual disability, epilepsy, scoliosis, choreoathetosis Choreoathetosis is the occurrence of involuntary m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glycosphingolipid
Glycosphingolipids are a subtype of glycolipids containing the amino alcohol sphingosine. They may be considered as sphingolipids with an attached carbohydrate. Glycosphingolipids are a group of lipids (more specifically, sphingolipids) and are a part of the cell membrane. They consist of a hydrophobic ceramide part and a glycosidically bound carbohydrate part. This oligosaccharide content remains on the outside of the cell membrane where it is important for biological processes such as cell adhesion or cell–cell interactions. Glycosphingolipids play also important role in oncogenesis and ontogenesis. Classification In general, glycosphingolipids can be categorized into two groups: neutral glycosphingolipids (also called glycosphingolipids) and negatively charged glycosphingolipids. The latter can be distinguished again by means of the charge carrier. While in gangliosides sialic acids are found, sulfatides have a sulfate group. The structural similarity of most glycolipids is t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Globoside
Globosides are a sub-class of the lipid class glycosphingolipid with three to nine sugar molecules as the side chain (or R group) of ceramide. The sugars are usually a combination of ''N''-acetylgalactosamine, D-glucose or D-galactose. One characteristic of globosides is that the "core" sugars consists of Glucose-Galactose-Galactose (Ceramide-βGlc4-1βGal4-1αGal), like in the case of the most basic globosidGb3 also known as pk-antigen. Another important characteristic of globosides is that they are neutral at pH 7, because they usually do not contain neuraminic acid, a sugar with an acidic carboxy-group. However, some globosides with the core structure Cer-Glc-Gal-Gal do contain neuraminic acid, e.g. the globo-series glycosphingolipid "SSEA-4-antigen" The side chain can be cleaved by galactosidases and glucosidases. The deficiency of α-galactosidase A causes Fabry's disease, an inherited metabolic disease characterized by the accumulation of the globoside globotriaosylceram ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gaucher's Disease
Gaucher's disease or Gaucher disease () (GD) is a genetic disorder A genetic disorder is a health problem caused by one or more abnormalities in the genome. It can be caused by a mutation in a single gene (monogenic) or multiple genes (polygenic) or by a chromosomal abnormality. Although polygenic disorders ... in which glucocerebroside (a sphingolipid, also known as glucosylceramide) accumulates in cells and certain organs. The disorder is characterized by bruising, fatigue (medical), fatigue, anemia, low blood platelet count and enlargement of the liver and spleen, and is caused by a hereditary deficiency of the enzyme glucocerebrosidase (also known as glucosylceramidase), which acts on glucocerebroside. When the enzyme is defective, glucocerebroside accumulates, particularly in white blood cells and especially in macrophages (mononuclear leukocytes, which is often a target for intracellular parasites). Glucocerebroside can collect in the spleen, liver, kidneys, Human lung, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glioblastoma
Glioblastoma, previously known as glioblastoma multiforme (GBM), is one of the most aggressive types of cancer that begin within the brain. Initially, signs and symptoms of glioblastoma are nonspecific. They may include headaches, personality changes, nausea, and symptoms similar to those of a stroke. Symptoms often worsen rapidly and may progress to unconsciousness. The cause of most cases of glioblastoma is not known. Uncommon risk factors include genetic disorders, such as neurofibromatosis and Li–Fraumeni syndrome, and previous radiation therapy. Glioblastomas represent 15% of all brain tumors. They can either start from normal brain cells or develop from an existing low-grade astrocytoma. The diagnosis typically is made by a combination of a CT scan, MRI scan, and tissue biopsy. There is no known method of preventing the cancer. Treatment usually involves surgery, after which chemotherapy and radiation therapy are used. The medication temozolomide is frequently used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lactosylceramide 1,3-N-acetyl-beta-D-glucosaminyltransferase
In enzymology, a lactosylceramide 1,3-N-anning-beta-D-glrofelucosaminyltlolferase () is an enzyme that catalyzes the chemical reaction :UDP-N-acetyl-D-glucosamine + D-galactosyl-1,4-beta-D-glucosylceramide \rightleftharpoons UDP + N-acetyl-D-glucosaminyl-1,3-beta-D-galactosyl-1,4-beta-D- glucosylceramide Thus, the two substrates of this enzyme are UDP-N-acetyl-D-glucosamine and D-galactosyl-1,4-beta-D-glucosylceramide, whereas its 3 products are UDP, N-acetyl-D-glucosaminyl-1,3-beta-D-galactosyl-1,4-beta-D-, and glucosylceramide. This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is UDP-N-acetyl-D-glucosamine:D-galactosyl-1,4-beta-D-glucosylceramide beta-1,3-acetylglucosaminyltransferase. Other names in common use include LA2 synthase, beta1->3-N-acetylglucosaminyltransferase, uridine diphosphoacetylglucosamine-lactosylceramide, beta-acetylglucosaminyltransferase, and lactosylceramide beta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lactosylceramide Alpha-2,3-sialyltransferase
In enzymology, a lactosylceramide alpha-2,3-sialyltransferase () is an enzyme that catalyzes the chemical reaction :CMP-N-acetylneuraminate + beta-D-galactosyl-1,4-beta-D-glucosylceramide \rightleftharpoons CMP + alpha-N-acetylneuraminyl-2,3-beta-D-galactosyl-1,4-beta-D- glucosylceramide Thus, the two substrates of this enzyme are CMP-N-acetylneuraminate and beta-D-galactosyl-1,4-beta-D-glucosylceramide, whereas its 3 products are CMP, alpha-N-acetylneuraminyl-2,3-beta-D-galactosyl-1,4-beta-D-, and glucosylceramide. This enzyme belongs to the family of transferases, specifically those glycosyltransferases that do not transfer hexosyl or pentosyl groups. The systematic name of this enzyme class is CMP-N-acetylneuraminate:lactosylceramide alpha-2,3-N-acetylneuraminyltransferase. Other names in common use include cytidine monophosphoacetylneuraminate-lactosylceramide alpha2,3-, sialyltransferase, CMP-acetylneuraminate-lactosylceramide-sialyltransferase, CMP-acetylneuraminic aci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
GAL3ST1
Galactosylceramide sulfotransferase is an enzyme that in humans is encoded by the ''GAL3ST1'' gene. Sulfonation, an important step in the metabolism of many drugs, xenobiotics, hormones, and neurotransmitters, is catalyzed by sulfotransferases. The product of this gene is galactosylceramide sulfotransferase which catalyzes the conversion between 3'-phosphoadenylylsulfate + a galactosylceramide to adenosine 3',5'-bisphosphate + galactosylceramide sulfate. Activity of this sulfotransferase is enhanced in renal cell carcinoma Renal cell carcinoma (RCC) is a kidney cancer that originates in the lining of the proximal convoluted tubule, a part of the very small tubes in the kidney that transport primary urine. RCC is the most common type of kidney cancer in adults, resp .... References Further reading * * * * * * * * * * * * {{gene-22-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
