Nelson Avonce
Universidad Autónoma del Estado de México
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Publication
Featured researches published by Nelson Avonce.
BMC Evolutionary Biology | 2006
Nelson Avonce; Alfredo Mendoza-Vargas; Gabriel Iturriaga
BackgroundThe compatible solute trehalose is a non-reducing disaccharide, which accumulates upon heat, cold or osmotic stress. It was commonly accepted that trehalose is only present in extremophiles or cryptobiotic organisms. However, in recent years it has been shown that although higher plants do not accumulate trehalose at significant levels they have actively transcribed genes encoding the corresponding biosynthetic enzymes.ResultsIn this study we show that trehalose biosynthesis ability is present in eubacteria, archaea, plants, fungi and animals. In bacteria there are five different biosynthetic routes, whereas in fungi, plants and animals there is only one. We present phylogenetic analyses of the trehalose-6-phosphate synthase (TPS) and trehalose-phosphatase (TPP) domains and show that there is a close evolutionary relationship between these domains in proteins from diverse organisms. In bacteria TPS and TPP genes are clustered, whereas in eukaryotes these domains are fused in a single protein.ConclusionWe have demonstrated that trehalose biosynthesis pathways are widely distributed in nature. Interestingly, several eubacterial species have multiple pathways, while eukaryotes have only the TPS/TPP pathway. Vertebrates lack trehalose biosynthetic capacity but can catabolise it. TPS and TPP domains have evolved mainly in parallel and it is likely that they have experienced several instances of gene duplication and lateral gene transfer.
Archive | 2002
Johan M. Thevelein; Barbara Leyman; Dijck Patrick Van; Nelson Avonce; Gabriel Iturriaga
Archive | 2004
Johan M. Thevelein; Barbara Leyman; Patrick Van Dijck; Nelson Avonce; Gabriel Iturriaga
Archive | 2010
Nelson Avonce; Patrick Van Dijck
Archive | 2010
Hilde Van Houtte; Lies Vandesteene; Lorena Lopez; Nelson Avonce; Patrick Van Dijck
Archive | 2010
Nelson Avonce; Patrick Van Dijck
Archive | 2009
Lies Vandesteene; Lorena Lopez; Nelson Avonce; Hilde Van Houtte; Patrick Van Dijck
Archive | 2009
Nelson Avonce; Patrick Van Dijck
Archive | 2008
Nelson Avonce; Andy Cuming; Patrick Van Dijck
Archive | 2008
Nelson Avonce; Jan Wuyts; Patrick Van Dijck