Brucellacentral carbon metabolism: an update
| Autor: | Ignacio Moriyón, Leticia Lázaro-Antón, Hubert Plovier, Jean-Jacques Letesson, S. Moussa, Maite Iriarte, Thibault Barbier, Jean-François Sternon, X. De Bolle, Amaia Zúñiga-Ripa, Raquel Conde-Álvarez |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
030106 microbiology Glyoxylate cycle Microbial metabolism Gene Expression Regulation Bacterial General Medicine Metabolism Biology Brucella Applied Microbiology and Biotechnology Microbiology Carbon Citric acid cycle 03 medical and health sciences chemistry.chemical_compound Gluconeogenesis Biochemistry chemistry Ribose Glycolysis Entner–Doudoroff pathway Metabolic Networks and Pathways |
| Zdroj: | Critical Reviews in Microbiology. 44:182-211 |
| ISSN: | 1549-7828 1040-841X |
| DOI: | 10.1080/1040841x.2017.1332002 |
| Popis: | The brucellae are facultative intracellular pathogens causing brucellosis, an important zoonosis. Here, we review the nutritional, genetic, proteomic and transcriptomic studies on Brucella carbon uptake and central metabolism, information that is needed for a better understanding of Brucella virulence. There is no uniform picture across species but the studies suggest primary and/or secondary transporters for unknown carbohydrates, lactate, glycerol phosphate, erythritol, xylose, ribose, glucose and glucose/galactose, and routes for their incorporation to central metabolism, including an erythritol pathway feeding the pentose phosphate cycle. Significantly, all brucellae lack phosphoenolpyruvate synthase and phosphofructokinase genes, which confirms previous evidence on glycolysis absence, but carry all Entner-Doudoroff (ED) pathway and Krebs cycle (and glyoxylate pathway) genes. However, glucose catabolism proceeds through the pentose phosphate cycle in the classical species, and the ED pathway operates in some rodent-associated brucellae, suggesting an ancestral character for this pathway in this group. Gluconeogenesis is functional but does not rely exclusively on classical fructose bisphosphatases. Evidence obtained using infection models is fragmentary but suggests the combined or sequential use of hexoses/pentoses, amino acids and gluconeogenic substrates. We also discuss the role of the phosphotransferase system, stringent reponse, quorum sensing, BvrR/S and sRNAs in metabolism control, an essential aspect of the life style of facultative intracellular parasites. |
| Databáze: | OpenAIRE |
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