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Transaldolase
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
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Transaldolase (TAL) (Gen: TALDO1) heiΓt das Enzym, welches die Γbertragung eines C3-KΓΆrpers von Sedoheptulose-7-phosphat auf D-Glycerinaldehyd-3-phosphat und umgekehrt ermΓΆglicht. Dieses Reaktionsgleichgewicht ist ein wichtiger Teil des Pentosephosphatwegs in allen Lebewesen.
Mutationen kΓΆnnen die (seltene) Erbkrankheit Transaldolasemangel bedingen.
Contents
β’ Erkrankungen
β’ Anwendung
β’ Weblinks
β’ Einzelnachweise
ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ
Katalysiertes Gleichgewicht
Physiologische Wirkungen
Die Regulation der Genexpression im TALDO1-Gen kann den Glutathionspiegel und die SensitivitΓ€t von Zellen fΓΌr Apoptose beeinflussen.cite-ref-1[1]
Erkrankungen
Manche multiple-Sklerose-Patienten besitzen AntikΓΆrper gegen Bereiche der Transaldolase.cite-ref-2[2]
Transaldolasemangel
Mutationen im TALDO1-Gen kΓΆnnen zur (seltenen) Erbkrankheit des Transaldolasemangels und dieser zu Leberzirrhose fΓΌhren.cite-ref-3[3] Auch Multiorganversagen kann bei Transaldolasemangel auftreten.cite-ref-4[4]
Andere Gendefekte
Varianten des Enzyms sind mΓΆglicherweise mit Plattenepithelkarzinom assoziiert.cite-ref-5[5]cite-ref-6[6]cite-ref-7[7]
Anwendung
Unterscheidungen des bakteriellen Transaldolase-Gens mittels Polymerase-Kettenreaktion werden genutzt, eine Darmbesiedelung durch Bifidobacterium zu identifizieren und zu quantifizieren.cite-ref-8[8]
Weblinks
Wikibooks: Biochemie und Pathobiochemie: Hexosemonophosphatweg
β Lern- und Lehrmaterialien
β’ [ reactome.org: https://reactome.org/content/detail/R-HSA-71334 sedoheptulose 7-phosphate + D-glyceraldehyde 3-phosphate β D-erythrose 4-phosphate + D-fructose 6-phosphate]
Einzelnachweise
cite-note-11. β 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. 32994β33001, doi:10.1074/jbc.271.51.32994.
cite-note-22. β Niland B, Banki K, Biddison WE, Perl A: CD8+ T cell-mediated HLA-A*0201-restricted cytotoxicity to transaldolase peptide 168-176 in patients with multiple sclerosis. In: J. Immunol. 175. Jahrgang, Nr. 12, Dezember 2005, S. 8365β8378, PMID 16339578.
cite-note-33. β 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. 1086β1092, doi:10.1086/320108.
cite-note-44. β Vassili Valayannopoulos, Nanda M. Verhoeven, Karine Mention, Gajja S. Salomons, DaniΓ¨le 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. 713β717, doi:10.1016/j.jpeds.2006.08.016.
cite-note-88. β 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. 2420β2427, doi:10.1128/AEM.68.5.2420-2427.2002.