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Widespread occurrence of non-phosphorylating glyceraldehyde-3-phosphate dehydrogenase among gram-positive bacteria.

Authors: Iddar, Abdelghani; Valverde, Federico; Assobhei, Omar; Serrano, Aurelio; Soukri, Abdelaziz;

Widespread occurrence of non-phosphorylating glyceraldehyde-3-phosphate dehydrogenase among gram-positive bacteria.

Abstract

La gliceraldehído-3-fosfato deshidrogenasa no-fosforilante (GAPDHN, NADP+ -específica, EC 1.2.1.9) está presente en organismos eucariotas fotosintéticos y en algunas cepas de Streptococcus y Clostridium. En este trabajo se presentan los resultados de los análisis de actividad e inmunotransferencia, que se utilizaron para la primera prospección de la distribución de GAPDHN bacteriana en diversas cepas de Bacillus, Streptococcus y Clostridium. Se han identificado genes putativos gapN mediante amplificación por PCR de secuencias parciales de 700 bp utilizando cebadores degenerados construidos a partir de regiones proteínicas muy conservadas. Las secuencias de aminoácidos de estos fragmentos se alinearon con las de otras secuencias conocidas de GAPDHN eucarióticas y procarióticas, lo que demuestra la presencia de residuos conservados que participan en la actividad catalítica y que no se han conservado en las aldehído deshidrogenasas, una familia de proteínas estrechamente relacionadas con las GAPDHN. Los resultados confirman que las características estructurales básicas de los miembros de la familia GAPDHN se han conservado durante la evolución y que no existe identidad con las GAPDH fosforilantes. Además, los árboles filogenéticos generados a partir de alineaciones de secuencia múltiples sugieren una estrecha relación entre las familias GAPDHN en plantas y bacterias.

The non-phosphorylating glyceraldehyde 3-phosphate dehydrogenase (GAPDHN, NADP+ -specific, EC 1.2.1.9) is present in green eukaryotes and some Streptococcus strains. The present report describes the results of activity and immunoblot analyses, which were used to generate the first survey of bacterial GAPDHN distribution in a number of Bacillus, Streptococcus and Clostridium strains. Putative gapN genes were identified after PCR amplification of partial 700-bp sequences using degenerate primers constructed from highly conserved protein regions. Alignment of the amino acid sequences of these fragments with those of known sequences from other eukaryotic and prokaryotic GAPDHNs, demonstrated the presence of conserved residues involved in catalytic activity that are not conserved in aldehyde dehydrogenases, a protein family closely linked to GAPDHNs. The results confirm that the basic structural features of the members of the GAPDHN family have been conserved throughout evolution and that no identity exists with phosphorylating GAPDHs. Furthermore, phylogenetic trees generated from multiple sequence alignments suggested a close relationship between plant and bacterial GAPDHN families.

This work was supported by AECI (Spain) and Collaborative Grants from the Andalusian Government (Consejería de Presidencia, Junta de Andalucía, Ayuda de Cooperación al Desarrollo en el Ambito Universitario no. 52/02, 54/04, and PAI CVI-261 group) – Ministére d’Education et de la Recherche Scientifique and PARS (Morocco). FV was supported by an EU Marie Curie reintegration project no. 505303.

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Keywords

Clostridium, Sequence Homology, Amino Acid, Molecular Sequence Data, Non-phosphorylating glyceraldehyde-3-phosphate dehydrogenase, Glyceraldehyde-3-Phosphate Dehydrogenases, Streptococcus, Bacillus, gapN genes, genes gapN, Gram-Positive Bacteria, Polymerase Chain Reaction, gliceraldeído-3-fosfato desidrogenase não fosforiladora, gliceraldehído-3-fosfato deshidrogenasa no fosforilante, Amino Acid Sequence, Phosphorylation, Sequence Alignment, non-phosphorylating glyceraldehyde-3-phosphate dehydrogenase, Phylogeny, DNA Primers

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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