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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
03/05/2004 |
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Data da última atualização: |
11/07/2017 |
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Autoria: |
HUNGRIA, M.; NICOLÁS, M. F.; GUIMARAES, C. T.; JARDIM, S. N.; GOMES, E. A.; VASCONCELOS, A. T. T. de. |
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Afiliação: |
MARIANGELA HUNGRIA DA CUNHA, CNPSO; MARISA FABIANA NICOLÁS, Pós-graduanda; CLAUDIA TEIXEIRA GUIMARAES, CNPMS; SILVIA NETO JARDIM BELICUAS, CNPMS; ELIANE APARECIDA GOMES, CNPMS; ANA TEREZA RIBEIRO DE VASCONCELOS, LNCC. |
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Título: |
Tolerance to stress and environmental adaptability of Chromobacterium violaceum. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Genetics and Molecular Research, v. 3, n. 1, p. 102-116, Mar. 2004. |
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ISSN: |
1676-5680 |
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Idioma: |
Inglês |
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Conteúdo: |
Chromobacterium violaceum is a Gram-negative bacterium, abundant in a variety of ecosystems in tropical and subtropical regions, including the water and borders of the Negro River, a major component of the Amazon Basin. As a free-living microorganism, C. violaceum is exposed to a series of variable conditions, such as different sources and abundance of nutrients, changes in temperature and pH, toxic compounds and UV rays. These variations, and the wide range of environments, require great adaptability and strong protective systems. The complete genome sequencing of this bacterium has revealed an enormous number and variety of ORFs associated with alternative pathways for energy generation, transport-related proteins, signal transduction, cell motility, secretion, and secondary metabolism. Additionally, the limited availability of iron in most environments can be overcome by iron-chelating compounds, iron-storage proteins, and by several proteins related to iron metabolism in the C. violaceum genome. Osmotically inducible proteins, transmembrane water-channel, and other membrane porins may be regulating the movement of water and maintaining the cell turgor, activities which play an important role in the adaptation to variations in osmotic pressure. Several proteins related to tolerance against antimicrobial compounds, heavy metals, temperature, acid and UV light stresses, others that promote survival under starvation conditions, and enzymes capable of detoxifying reactive oxygen species were also detected in C. violaceum. All these features together help explain its remarkable competitiveness and ability to survive under different types of environmental stresse. MenosChromobacterium violaceum is a Gram-negative bacterium, abundant in a variety of ecosystems in tropical and subtropical regions, including the water and borders of the Negro River, a major component of the Amazon Basin. As a free-living microorganism, C. violaceum is exposed to a series of variable conditions, such as different sources and abundance of nutrients, changes in temperature and pH, toxic compounds and UV rays. These variations, and the wide range of environments, require great adaptability and strong protective systems. The complete genome sequencing of this bacterium has revealed an enormous number and variety of ORFs associated with alternative pathways for energy generation, transport-related proteins, signal transduction, cell motility, secretion, and secondary metabolism. Additionally, the limited availability of iron in most environments can be overcome by iron-chelating compounds, iron-storage proteins, and by several proteins related to iron metabolism in the C. violaceum genome. Osmotically inducible proteins, transmembrane water-channel, and other membrane porins may be regulating the movement of water and maintaining the cell turgor, activities which play an important role in the adaptation to variations in osmotic pressure. Several proteins related to tolerance against antimicrobial compounds, heavy metals, temperature, acid and UV light stresses, others that promote survival under starvation conditions, and enzymes capable of detoxifying reactive oxy... Mostrar Tudo |
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Palavras-Chave: |
Adaptabilidade; Microorganismo; Tolerancia. |
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Thesagro: |
Bactéria; Stress. |
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Categoria do assunto: |
-- |
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Marc: |
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001 1466991
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008 2004 bl uuuu u00u1 u #d
022 $a1676-5680
100 1 $aHUNGRIA, M.
245 $aTolerance to stress and environmental adaptability of Chromobacterium violaceum.
260 $c2004
520 $aChromobacterium violaceum is a Gram-negative bacterium, abundant in a variety of ecosystems in tropical and subtropical regions, including the water and borders of the Negro River, a major component of the Amazon Basin. As a free-living microorganism, C. violaceum is exposed to a series of variable conditions, such as different sources and abundance of nutrients, changes in temperature and pH, toxic compounds and UV rays. These variations, and the wide range of environments, require great adaptability and strong protective systems. The complete genome sequencing of this bacterium has revealed an enormous number and variety of ORFs associated with alternative pathways for energy generation, transport-related proteins, signal transduction, cell motility, secretion, and secondary metabolism. Additionally, the limited availability of iron in most environments can be overcome by iron-chelating compounds, iron-storage proteins, and by several proteins related to iron metabolism in the C. violaceum genome. Osmotically inducible proteins, transmembrane water-channel, and other membrane porins may be regulating the movement of water and maintaining the cell turgor, activities which play an important role in the adaptation to variations in osmotic pressure. Several proteins related to tolerance against antimicrobial compounds, heavy metals, temperature, acid and UV light stresses, others that promote survival under starvation conditions, and enzymes capable of detoxifying reactive oxygen species were also detected in C. violaceum. All these features together help explain its remarkable competitiveness and ability to survive under different types of environmental stresse.
650 $aBactéria
650 $aStress
653 $aAdaptabilidade
653 $aMicroorganismo
653 $aTolerancia
700 1 $aNICOLÁS, M. F.
700 1 $aGUIMARAES, C. T.
700 1 $aJARDIM, S. N.
700 1 $aGOMES, E. A.
700 1 $aVASCONCELOS, A. T. T. de
773 $tGenetics and Molecular Research$gv. 3, n. 1, p. 102-116, Mar. 2004.
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