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Ceramide Kinase
In enzymology, a ceramide kinase, also abbreviated as CERK, () is an enzyme that catalyzes the chemical reaction: :ATP + ceramide \rightleftharpoons ADP + ceramide 1-phosphate Thus, the two substrates of this enzyme are ATP and ceramide, whereas its two products are ADP and ceramide-1-phosphate. This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing groups ( phosphotransferases) with an alcohol group as acceptor. The systematic name of this enzyme class is ATP:ceramide 1-phosphotransferase. This enzyme is also called acylsphingosine kinase. This enzyme participates in sphingolipid metabolism. Gene CERK is encoded by the CERK gene. The CERK gene is located on human chromosome 22q13, contains 13 exons, and is approximately 4.5kb in length. CERK shares sequence homology with sphingosine kinase type I, including an N-terminal pleckstrin homology (PH) domain and a diacylglycerol kinase domain. BLAST searches of expressed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enzymology
Enzymes () are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products. Almost all metabolic processes in the cell need enzyme catalysis in order to occur at rates fast enough to sustain life. Metabolic pathways depend upon enzymes to catalyze individual steps. The study of enzymes is called ''enzymology'' and the field of pseudoenzyme analysis recognizes that during evolution, some enzymes have lost the ability to carry out biological catalysis, which is often reflected in their amino acid sequences and unusual 'pseudocatalytic' properties. Enzymes are known to catalyze more than 5,000 biochemical reaction types. Other biocatalysts are catalytic RNA molecules, called ribozymes. Enzymes' specificity comes from their unique three-dimensional structures. Like all catalysts, enzymes increase the reaction ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
