TY - JOUR
T1 - Identification of the missing links in prokaryotic pentose oxidation pathways: evidence for enzyme recruitment
AU - Brouns, S.J.J.
AU - Walther, J.
AU - Snijders, A.P.
AU - van de Werken, H.J.G.
AU - Willemen, H.L.D.M.
AU - Worm, P.
AU - de Vos, M.G.
AU - Andersson, A.
AU - Lundgren, M.
AU - Mazon, H.F.
AU - van den Heuvel, R.H.H.
AU - Nilsson, P.
AU - Salmon, L.
AU - de Vos, W.M.
AU - Wright, P.C.
AU - Bernander, R.
AU - van der Oost, J.
PY - 2006
Y1 - 2006
N2 - The pentose metabolism of Archaea is largely unknown. Here, we have employed an integrated genomics approach including DNA microarray and proteomics analyses to elucidate the catabolic pathway for D-arabinose in Sulfolobus solfataricus. During growth on this sugar, a small set of genes appeared to be differentially expressed compared with growth on D-glucose. These genes were heterologously overexpressed in Escherichia coli, and the recombinant proteins were purified and biochemically studied. This showed that D-arabinose is oxidized to 2-oxoglutarate by the consecutive action of a number of previously uncharacterized enzymes, including a D-arabinose dehydrogenase, a D-arabinonate dehydratase, a novel 2-keto-3-deoxy-D-arabinonate dehydratase, and a 2,5-dioxopentanoate dehydrogenase. Promoter analysis of these genes revealed a palindromic sequence upstream of the TATA box, which is likely to be involved in their concerted transcriptional control. Integration of the obtained biochemical data with genomic context analysis strongly suggests the occurrence of pentose oxidation pathways in both Archaea and Bacteria, and predicts the involvement of additional enzyme components. Moreover, it revealed striking genetic similarities between the catabolic pathways for pentoses, hexaric acids, and hydroxyproline degradation, which support the theory of metabolic pathway genesis by enzyme recruitment
AB - The pentose metabolism of Archaea is largely unknown. Here, we have employed an integrated genomics approach including DNA microarray and proteomics analyses to elucidate the catabolic pathway for D-arabinose in Sulfolobus solfataricus. During growth on this sugar, a small set of genes appeared to be differentially expressed compared with growth on D-glucose. These genes were heterologously overexpressed in Escherichia coli, and the recombinant proteins were purified and biochemically studied. This showed that D-arabinose is oxidized to 2-oxoglutarate by the consecutive action of a number of previously uncharacterized enzymes, including a D-arabinose dehydrogenase, a D-arabinonate dehydratase, a novel 2-keto-3-deoxy-D-arabinonate dehydratase, and a 2,5-dioxopentanoate dehydrogenase. Promoter analysis of these genes revealed a palindromic sequence upstream of the TATA box, which is likely to be involved in their concerted transcriptional control. Integration of the obtained biochemical data with genomic context analysis strongly suggests the occurrence of pentose oxidation pathways in both Archaea and Bacteria, and predicts the involvement of additional enzyme components. Moreover, it revealed striking genetic similarities between the catabolic pathways for pentoses, hexaric acids, and hydroxyproline degradation, which support the theory of metabolic pathway genesis by enzyme recruitment
KW - l-arabinose metabolism
KW - archaeon sulfolobus-solfataricus
KW - entner-doudoroff pathway
KW - escherichia-coli
KW - crystal-structure
KW - thermoacidophilic crenarchaeon
KW - fumarylacetoacetate hydrolase
KW - pseudomonas-saccharophila
KW - glutamate-dehydrogenase
KW - caulobacter-crescen
U2 - 10.1074/jbc.M605549200
DO - 10.1074/jbc.M605549200
M3 - Article
SN - 0021-9258
VL - 281
SP - 27378
EP - 27388
JO - Journal of Biological Chemistry
JF - Journal of Biological Chemistry
IS - 37
ER -