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In enzymology, a 1-deoxy-d-xylulose-5-phosphate synthase (EC 2.2.1.7) is an enzyme in the non-mevalonate pathway that catalyzes the chemical reaction pyruvate + d -glyceraldehyde 3-phosphate ⇌ {\displaystyle \rightleftharpoons } 1-deoxy- d -xylulose 5-phosphate + CO 2
The enzyme involved in making 1-deoxy-d-xylulose 5-phosphate (DXP) is DXP synthase. [2] The mechanism follows a catalysis of decarboxylative condensation of pyruvate and d-glyceraldehyde 3-phosphate to produce DXP. [2] [3] In addition, the molecule is involved in making thiamine (vitamin B 1) and pyridoxol (vitamin B 6). [2]
D-Xylulose 5-phosphate (D-xylulose-5-P) is an intermediate in the pentose phosphate pathway. It is a ketose sugar formed from ribulose-5-phosphate by ribulose-5-phosphate epimerase. In the non-oxidative branch of the pentose phosphate pathway, xylulose-5-phosphate acts as a donor of two-carbon ketone groups in transketolase reactions.
This may also be called standard range. In contrast, optimal (health) range or therapeutic target is a reference range or limit that is based on concentrations or levels that are associated with optimal health or minimal risk of related complications and diseases. For most substances presented, the optimal levels are the ones normally found in ...
In Arabidopsis thaliana 1-deoxy-D-xylulose 5-phosphate reductoisomerase is the first committed enzyme of the MEP pathway for isoprenoid precursor biosynthesis. The enzyme requires Mn 2+, Co 2+ or Mg 2+ for activity, with Mn 2+ being most effective.
A phosphate concentration greater than 1.46 mmol/L (4.5 mg/dL) is indicative of hyperphosphatemia, though further tests may be needed to identify the underlying cause of the elevated phosphate levels. [5] It is considered significant when levels are greater than 1.6 mmol/L (5 mg/dL). [2]
DXP reductoisomerase (also known as: DXR, DOXP reductoisomerase, IspC, MEP synthase), is a key enzyme in the MEP pathway. It can be inhibited by the natural product fosmidomycin , which is under study as a starting point to develop a candidate antibacterial or antimalarial drug.
DXP may refer to: 1-Deoxy-D-xylulose 5-phosphate, chemical compound; 1-deoxy-D-xylulose-5-phosphate synthase (also DXP-synthase), an enzyme; Deep eXecution Processor, a class of processor made by British multinational fabless semiconductor company Icera; Domino's DXP, custom third-generation Chevrolet Sparks commissioned by Domino's Pizza