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Non-mevalonate Pathway
The non-mevalonate pathway—also appearing as the mevalonate-independent pathway and the 2-''C''-methyl-D-erythritol 4-phosphate/1-deoxy-D-xylulose 5-phosphate (MEP/DOXP) pathway—is an alternative metabolic pathway for the biosynthesis of the isoprenoid precursors isopentenyl pyrophosphate (IPP) and dimethylallyl pyrophosphate (DMAPP). The currently preferred name for this pathway is the MEP pathway, since MEP is the first committed metabolite on the route to IPP. Isoprenoid precursor biosynthesis The mevalonate pathway (MVA pathway or HMG-CoA reductase pathway) and the MEP pathway are metabolic pathways for the biosynthesis of isoprenoid precursors: IPP and DMAPP. Whereas plants use both MVA and MEP pathway, most organisms only use one of the pathways for the biosynthesis of isoprenoid precursors. In plant cells IPP/DMAPP biosynthesis via the MEP pathway takes place in plastid organelles, while the biosynthesis via the MVA pathway takes place in the cytoplasm. Most gram-nega ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biosynthesis
Biosynthesis, i.e., chemical synthesis occurring in biological contexts, is a term most often referring to multi-step, enzyme-Catalysis, catalyzed processes where chemical substances absorbed as nutrients (or previously converted through biosynthesis) serve as enzyme substrate (chemistry), substrates, with conversion by the living organism either into simpler or more complex Product (chemistry), products. Examples of biosynthetic pathways include those for the production of amino acids, lipid membrane components, and nucleotides, but also for the production of all classes of biological macromolecules, and of acetyl-coenzyme A, adenosine triphosphate, nicotinamide adenine dinucleotide and other key intermediate and transactional molecules needed for metabolism. Thus, in biosynthesis, any of an array of Chemical compound, compounds, from simple to complex, are converted into other compounds, and so it includes both the catabolism and anabolism (building up and breaking down) of comple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Non-mevalonate Pathway
The non-mevalonate pathway—also appearing as the mevalonate-independent pathway and the 2-''C''-methyl-D-erythritol 4-phosphate/1-deoxy-D-xylulose 5-phosphate (MEP/DOXP) pathway—is an alternative metabolic pathway for the biosynthesis of the isoprenoid precursors isopentenyl pyrophosphate (IPP) and dimethylallyl pyrophosphate (DMAPP). The currently preferred name for this pathway is the MEP pathway, since MEP is the first committed metabolite on the route to IPP. Isoprenoid precursor biosynthesis The mevalonate pathway (MVA pathway or HMG-CoA reductase pathway) and the MEP pathway are metabolic pathways for the biosynthesis of isoprenoid precursors: IPP and DMAPP. Whereas plants use both MVA and MEP pathway, most organisms only use one of the pathways for the biosynthesis of isoprenoid precursors. In plant cells IPP/DMAPP biosynthesis via the MEP pathway takes place in plastid organelles, while the biosynthesis via the MVA pathway takes place in the cytoplasm. Most gram-nega ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
YgbB N Terminal Protein Domain
In molecular biology, YgbB is a protein domain. This entry makes reference to a number of proteins from eukaryotes and prokaryotes which share this common N-terminal signature and appear to be involved in terpenoid biosynthesis. The YgbB protein is a putative enzyme thought to aid terpenoid and isoprenoid biosynthesis, a vital chemical in all living organisms. This protein domain is part of an enzyme which catalyses a reaction in a complex pathway. Function The YgbB protein domain has a main function of being involved in terpenoid and isoprenoid biosynthesis. Biochemistry MECDP (2-C-methyl-D-erythritol 2,4-cyclodiphosphate) synthetase, an enzyme in the non-mevalonate pathway of isoprenoid synthesis, isoprenoids being essential in all organisms. Isoprenoids can also be synthesized through the mevalonate pathway. The non-mevolante route is used by many bacteria and human pathogens, including ''Mycobacterium tuberculosis'' and ''Plasmodium falciparum''. This route appears to involve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2-C-methyl-D-erythritol 2,4-cyclodiphosphate Synthase
2-''C''-Methyl-D-erythritol 2,4-cyclodiphosphate synthase (MEcPP synthase, IspF, EC 4.6.1.12) is a zinc-dependent enzyme and a member of the YgbB N terminal protein domain, which participates in the MEP pathway (non-mevalonate pathway) of isoprenoid precursor biosynthesis. It catalyzes the following reaction: :4-diphosphocytidyl-2-''C''-methyl-D)erythritol 2-phosphate \rightleftharpoons 2-''C''-methyl-D-erythritol 2,4-cyclodiphosphate + CMP The enzyme is considered a phosphorus-oxygen lyase. The systematic name of this enzyme class is 2-phospho-4-(cytidine 5′-diphospho)-2-''C''-methyl-D-D-erythritol CMP-lyase (cyclizing; 2-''C''-methyl-D-erythritol 2,4-cyclodiphosphate-forming). Other names in common use include IspF, YgbB and MEcPP synthase. Structural studies As of late 2007, 20 structures A structure is an arrangement and organization of interrelated elements in a material object or system, or the object or system so organized. Material structures include man-made obj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
4-diphosphocytidyl-2-C-methyl-D-erythritol Kinase
In enzymology, a 4-(cytidine 5'-diphospho)-2-C-methyl-D-erythritol kinase () is an enzyme that catalyzes the chemical reaction :ATP + 4-diphosphocytidyl-2-C-methyl-D-erythritol 2-phosphate \rightleftharpoons ADP + 4-diphosphocytidyl-2-C-methyl-D-erythritol 2-phosphate Thus, the two substrates of this enzyme are ATP and 4-diphosphocytidyl-2-C-methyl-D-erythritol 2-phosphate (CDP-ME), whereas its two products are ADP and 4-diphosphocytidyl-2-C-methyl-D-erythritol 2-phosphate (CDP-MEP). 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:4-(cytidine 5'-diphospho)-2-C-methyl-D-erythritol 2-phosphotransferase. This enzyme is also called CDP-ME kinase, and IspE. This enzyme participates in the MEP pathway (non-mevalonate pathway) of isoprenoid precursor biosynthesis. Structural studies As of late 2007, 7 structures ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2-C-methyl-D-erythritol 4-phosphate Cytidylyltransferase
In enzymology, a 2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase () is an enzyme that catalyzes the chemical reaction: : 2-C-methyl-D-erythritol 4-phosphate + CTP \rightleftharpoons diphosphate + 4-(cytidine 5'-diphospho)-2-C-methyl-D-erythritol Image:MEP.png, 2-C-methylerythritol 4-phosphate Image:CTP chemical structure.png, Cytidine triphosphate Image:4-diphosphocytidyl-2-C-methylerythritol.png, 4-diphosphocytidyl-2-C-methylerythritol (CDP-ME) Thus, the two substrates of this enzyme are CTP and 2-C-methyl-D-erythritol 4-phosphate, whereas its two products are diphosphate and 4-diphosphocytidyl-2-C-methylerythritol. This enzyme belongs to the family of transferases, specifically those transferring phosphorus-containing nucleotide groups (nucleotidyltransferases). This enzyme participates in isoprenoid biosynthesis and stenvenosim. It catalyzes the third step of the MEP pathway; the formation of CDP-ME (4-diphosphocytidyl-2C-methyl-D-erythritol) from CTP a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2-C-methylerythritol 4-phosphate
2-''C''-Methyl--erythritol 4-phosphate (MEP) is an intermediate on the MEP pathway (non-mevalonate pathway) of isoprenoid precursor biosynthesis. It is the first committed metabolite on that pathway on the route to IPP and DMAPP. See also * DXP reductoisomerase * MEP pathway (formerly known as the non-mevalonate pathway) * Fosmidomycin Fosmidomycin is an antibiotic that was originally isolated from culture broths of bacteria of the genus ''Streptomyces''. It specifically inhibits DXP reductoisomerase, a key enzyme in the non-mevalonate pathway of isoprenoid biosynthesis. It is ... References External links * Organophosphates Monosaccharide derivatives {{biochem-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DXP Reductoisomerase
DXP reductoisomerase (1-deoxy-D-xylulose 5-phosphate reductoisomerase or DXR) is an enzyme that interconverts 1-deoxy-D-xylulose 5-phosphate (DXP) and 2-C-methyl-D-erythritol 4-phosphate (MEP). Image:DOXP.png, 1-Deoxy-D-xylulose 5-phosphate Image:MEP.png, 2-C-methyl-D-erythritol 4-phosphate It is classified under . It is normally abbreviated DXR, but it is sometimes named IspC, as the product of the ''ispC'' gene. DXR is part of the MEP pathway (nonmevalonate pathway) of isoprenoid precursor biosynthesis. DXR is inhibited by fosmidomycin. This enzyme is required for terpenoid biosynthesis in some organisms, since it is a key enzyme on the MEP pathway for the production of the isoprenoid precursors IPP and DMAPP. In ''Arabidopsis thaliana'' 1-deoxy-D-xylulose 5-phosphate reductoisomerase is the first committed enzyme of the MEP pathway for isoprenoid The terpenoids, also known as isoprenoids, are a class of naturally occurring organic chemicals derived from the 5-carbo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DOXP
1-Deoxy--xylulose 5-phosphate is a biosynthetic intermediate in the non-mevalonate pathway. Function The enzyme involved in making 1-deoxy-d-xylulose 5-phosphate (DXP) is DXP synthase. The mechanism follows a catalysis of decarboxylative condensation of pyruvate and d-glyceraldehyde 3-phosphate to produce DXP. In addition, the molecule is involved in making thiamine ( vitamin B1) and pyridoxol ( vitamin B6). The non-mevalonate pathway intermediate 1-deoxy-d-xylulose 5-phosphate (DXP) also acts as a precursor in making isoprenoids in many species such as bacteria, plants, and apicomplexan parasites, contributing to biological diversity. See also * DXP reductoisomerase * Terpenoid The terpenoids, also known as isoprenoids, are a class of naturally occurring organic compound, organic chemicals derived from the 5-carbon compound isoprene and its derivatives called terpenes, diterpenes, etc. While sometimes used interchangeabl ... References {{DEFAULTSORT:Deoxy-D-xyl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
