Article (Scientific journals)
Thiaminylated adenine nucleotides — chemical synthesis, structural characterization and natural occurrence
Frederich, Michel; Delvaux, David; Gigliobianco, Tiziana et al.
2009In FEBS Journal, 276 (12), p. 3256–3268
Peer Reviewed verified by ORBi
 

Files


Full Text
febs_7040.pdf
Publisher postprint (456.81 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
adenosine thiamine triphosphate; adenosine thiamine diphosphate; nucleotides; metabolism; cofactor
Abstract :
[en] Thiamine and its three phosphorylated derivatives (mono-, di- and triphosphate) occur naturally in most cells. Recently, we reported the presence of a fourth thiamine derivative, adenosine thiamine triphosphate (AThTP), produced in E. coli in response to carbon starvation. Here, we show that the chemical synthesis of AThTP leads to another new compound, adenosine thiamine diphosphate (thiaminylated ADP, AThDP), as a side product. The structure of both compounds was confirmed by mass spectrometry and 1H-, 13C- and 31P-NMR and some of their chemical properties were determined. Our results show an upfield shifting of the C-2 proton of the thiazolium ring in adenosine thiamine derivatives compared to the conventional thiamine phosphate derivatives. This modification of the electronic environment of the C-2 proton might be explained by a through-space interaction with the adenosine moiety, suggesting an U-shaped folding of adenosine thiamine derivatives. Such a structure where the C-2 proton is embedded in a closed conformation can be located using molecular modeling as an energy minimum. In E. coli, AThTP may account for 15% of total thiamine under energy stress. It is less abundant in eukaryotic organisms, but is consistently found in mammalian tissues and in some cell lines. Using a HPLC method, we show for the first time that AThDP may also occur in small amounts in E. coli and in vertebrate liver. The discovery of two natural thiamine adenine compounds further highlights the complexity and diversity of thiamine biochemistry, which is not restricted to the cofactor role of thiamine diphosphate.
Research center :
GIGA-Neurosciences et Centre Interfacultaire de Recherche en Pharmacochimie des Substances Naturelles et Synthétiques - CPSNS
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Frederich, Michel  ;  Université de Liège - ULiège > Département de pharmacie > Pharmacognosie
Delvaux, David ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > GIGA-R : Labo de recherche sur les métastases
Gigliobianco, Tiziana ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Département des sciences biomédicales et précliniques
GANGOLF, Marjorie ;  Centre Hospitalier Universitaire de Liège - CHU > Service d'Informations médico économiques (SIME)
Dive, Georges ;  Université de Liège - ULiège > Centre d'ingénierie des protéines
Mazzucchelli, Gabriel  ;  Université de Liège - ULiège > Center for Analytical Research and Technology (CART)
Elias, Benjamin
De Pauw, Edwin  ;  Université de Liège - ULiège > Département de chimie (sciences) > GIGA-R : Laboratoire de spectrométrie de masse (L.S.M.)
Angenot, Luc  ;  Université de Liège - ULiège > Département de pharmacie > Département de pharmacie
Wins, Pierre
Bettendorff, Lucien  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biochimie et physiologie humaine et pathologique
Language :
English
Title :
Thiaminylated adenine nucleotides — chemical synthesis, structural characterization and natural occurrence
Publication date :
2009
Journal title :
FEBS Journal
ISSN :
1742-464X
eISSN :
1742-4658
Publisher :
Blackwell Publishing, Oxford, United Kingdom
Volume :
276
Issue :
12
Pages :
3256–3268
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 21 May 2009

Statistics


Number of views
211 (54 by ULiège)
Number of downloads
9 (7 by ULiège)

Scopus citations®
 
37
Scopus citations®
without self-citations
29
OpenCitations
 
38

Bibliography


Similar publications



Contact ORBi