Reference : Thiamine triphosphate and thiamine triphosphatase activities: from bacteria to mammals
Scientific journals : Article
Life sciences : Biochemistry, biophysics & molecular biology
http://hdl.handle.net/2268/4627
Thiamine triphosphate and thiamine triphosphatase activities: from bacteria to mammals
English
Makarchikov, Alexander F [> > > >]
Lakaye, Bernard mailto [Université de Liège - ULg > Département des sciences biomédicales et précliniques > Biochimie et physiologie humaine et pathologique >]
Gulyai, I. E. [> > > >]
Czerniecki, Jan [Université de Liège - ULg > > Biochimie et physiologie humaine et pathologique >]
Coumans, Bernard mailto [Université de Liège - ULg > > CNCM/ Centre fac. de rech. en neurobiologie cell. et moléc. >]
Wins, Pierre [> > > >]
Grisar, Thierry mailto [Université de Liège - ULg > Département des sciences biomédicales et précliniques > Biochimie et physiologie humaine et pathologique]
Bettendorff, Lucien mailto [Université de Liège - ULg > Département des sciences biomédicales et précliniques > Biochimie et physiologie humaine et pathologique >]
2003
Cellular and Molecular Life Sciences : CMLS
Birkhauser Verlag Ag
60
7
1477-1488
Yes (verified by ORBi)
International
1420-682X
Basel
[en] thiamine triphosphate ; thiamine triphosphatase ; bacteria ; plants ; animals ; stress ; adenylyl cyclase ; vitamin B1
[en] In most organisms, the main form of thiamine is the coenzyme thiamine diphosphate. Thiamine triphosphate (ThTP) is also found in low amounts in most vertebrate tissues and can phosphorylate certain proteins. Here we show that ThTP exists not only in vertebrates but is present in bacteria, fungi, plants and invertebrates. Unexpectedly, we found that in Escherichia coli as well as in Arabidopsis thaliana, ThTP was synthesized only under particular circumstances such as hypoxia (E. coli) or withering (A. thaliana). In mammalian tissues, ThTP concentrations are regulated by a specific thiamine triphosphatase that we have recently characterized. This enzyme was found only in mammals. In other organisms, ThTP can be hydrolyzed by unspecific phosphohydrolases. The occurrence of ThTP from prokaryotes to mammals suggests that it may have a basic role in cell metabolism or cell signaling. A decreased content may contribute to the symptoms observed during thiamine deficiency.
http://hdl.handle.net/2268/4627

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