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Transketolase (abbreviated as TK) is an enzyme that, in humans, is encoded by the TKT gene. [1] It participates in both the pentose phosphate pathway in all organisms and the Calvin cycle of photosynthesis .
The pentose phosphate pathway. The pentose phosphate pathway (also called the phosphogluconate pathway and the hexose monophosphate shunt or HMP shunt) is a metabolic pathway parallel to glycolysis. [1]
In enzymology, a formaldehyde transketolase (EC 2.2.1.3) is an enzyme that catalyzes the chemical reaction D-xylulose 5-phosphate + formaldehyde ⇌ {\displaystyle \rightleftharpoons } glyceraldehyde 3-phosphate + glycerone
In what is essentially the reverse of step two, the electrons push back in the opposite direction forming a new bond between the substrate carbon and another atom. (In the case of the decarboxylases, this creates a new carbon-hydrogen bond. In the case of transketolase, this attacks a new substrate molecule to form a new carbon-carbon bond.)
transketolase and transaldolase: aldehyde or ketone groups EC 2.3: acyltransferase: acyl groups or groups that become alkyl groups during transfer EC 2.4: glycosyltransferase, hexosyltransferase, and pentosyltransferase: glycosyl groups, as well as hexoses and pentoses: EC 2.5: riboflavin synthase and chlorophyll synthase: alkyl or aryl groups ...
74419 Ensembl ENSG00000151005 ENSMUSG00000025519 UniProt Q9H0I9 Q9D4D4 RefSeq (mRNA) NM_032136 NM_001271574 NM_028927 RefSeq (protein) NP_115512 NP_001258503 NP_083203 Location (UCSC) Chr 4: 163.47 – 163.47 Mb Chr 8: 66.96 – 66.97 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Transketolase-like protein 2 is an enzyme that in humans is encoded by the TKTL2 gene. References ^ a b ...
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The cytosolic enzyme transketolase is central to the pentose phosphate pathway, a major route for the biosynthesis of the pentose sugars deoxyribose and ribose. The mitochondrial PDH and OGDH are part of biochemical pathways that result in the generation of adenosine triphosphate (ATP), which is the main energy transfer molecule for the cell.