Transaldolase
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| MEROPS | {{{Inhibitor_fam}}}}} | ||||||||||||
| Reaktionsart | Übertragung eines CHOH-Rests
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| Substrat | Sedoheptulose-7-phosphat + D-Glycerinaldehyd-3-phosphat
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| Produkte | D-Erythrose-4-phosphat + D-Fructose-6-phosphat
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Transaldolase (TAL) (Gen: TALDO1) heißt das Enzym, welches die Übertragung eines C3-Körpers von Sedoheptulose-7-phosphat auf D-Glycerinaldehyd-3-phosphat und umgekehrt ermöglicht. Dieses Reaktionsgleichgewicht ist ein wichtiger Teil des Pentosephosphatwegs in allen Lebewesen.
Mutationen können die (seltene) Erbkrankheit Transaldolasemangel bedingen.
Katalysiertes Gleichgewicht
Physiologische Wirkungen
Die Regulation der Genexpression im TALDO1-Gen kann den Glutathionspiegel und die Sensitivität von Zellen für Apoptose beeinflussen.<ref>Katalin Banki, Eliza Hutter, Emanuela Colombo, Nick J. Gonchoroff, Andras Perl: Glutathione levels and sensitivity to apoptosis are regulated by changes in transaldolase expression. In: Journal of Biological Chemistry. Band 271, Nr. 51, 1996, S. 32994–33001, {{#invoke:Vorlage:Handle|f|scheme=doi|class=plainlinks|parProblem=Problem|errCat=Wikipedia:Vorlagenfehler/Parameter:DOI|errClasses=error editoronly|errHide=1|errNS=0 4 10 100}}.</ref>
Erkrankungen
Manche multiple-Sklerose-Patienten besitzen Antikörper gegen Bereiche der Transaldolase.<ref>{{#invoke:Vorlage:Literatur|f}}{{#if:
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Transaldolasemangel
Mutationen im TALDO1-Gen können zur (seltenen) Erbkrankheit des Transaldolasemangels und dieser zu Leberzirrhose führen.<ref>Nanda M. Verhoeven, Jojanneke H.J. Huck, Birthe Roos, Eduard A. Struys, Gajja S. Salomons, Adriaan C. Douwes, Marjo S. van der Knaap, Cornelis Jakobs: Transaldolase deficiency: liver cirrhosis associated with a new inborn error in the pentose phosphate pathway. In: The American Journal of Human Genetics. Band 68, Nr. 5, 2001, S. 1086–1092, {{#invoke:Vorlage:Handle|f|scheme=doi|class=plainlinks|parProblem=Problem|errCat=Wikipedia:Vorlagenfehler/Parameter:DOI|errClasses=error editoronly|errHide=1|errNS=0 4 10 100}}.</ref> Auch Multiorganversagen kann bei Transaldolasemangel auftreten.<ref>Vassili Valayannopoulos, Nanda M. Verhoeven, Karine Mention, Gajja S. Salomons, Danièle Sommelet, Marie Gonzales, Guy Touati, Pascale de Lonlay, Cornelis Jakobs, Jean-Marie Saudubray: Transaldolase deficiency: a new cause of hydrops fetalis and neonatal multi-organ disease. In: The Journal of Pediatrics. Band 149, Nr. 5, 2006, S. 713–717, {{#invoke:Vorlage:Handle|f|scheme=doi|class=plainlinks|parProblem=Problem|errCat=Wikipedia:Vorlagenfehler/Parameter:DOI|errClasses=error editoronly|errHide=1|errNS=0 4 10 100}}.</ref>
Andere Gendefekte
Varianten des Enzyms sind möglicherweise mit Plattenepithelkarzinom assoziiert.<ref>{{#if: | | UniProt }} {{#if:|{{{titel}}}|P37837}}{{#if:|Vorlage:Abrufdatum}}</ref><ref>{{#invoke:Vorlage:Literatur|f}}{{#if:
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Anwendung
Unterscheidungen des bakteriellen Transaldolase-Gens mittels Polymerase-Kettenreaktion werden genutzt, eine Darmbesiedelung durch Bifidobacterium zu identifizieren und zu quantifizieren.<ref>Teresa Requena, Jeremy Burton, Takahiro Matsuki, Karen Munro, Mary Alice Simon, Ryuichiro Tanaka, Koichi Watanabe, Gerald W. Tannock: Identification, detection, and enumeration of human Bifidobacterium species by PCR targeting the transaldolase gene. In: Applied and Environmental Microbiology. Band 68, Nr. 5, 2002, S. 2420–2427, {{#invoke:Vorlage:Handle|f|scheme=doi|class=plainlinks|parProblem=Problem|errCat=Wikipedia:Vorlagenfehler/Parameter:DOI|errClasses=error editoronly|errHide=1|errNS=0 4 10 100}}.</ref>
Weblinks
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- [ reactome.org: https://reactome.org/content/detail/R-HSA-71334 sedoheptulose 7-phosphate + D-glyceraldehyde 3-phosphate ⇔ D-erythrose 4-phosphate + D-fructose 6-phosphate]
Einzelnachweise
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