Hydrocarbon degradation and protease production by Nocardiopsis sp. NCIM 5124

Dixit, Vaishali; Pant, Aditi

doi:10.1046/j.1472-765x.2000.00665.x

Cited by 32 publications

(10 citation statements)

References 6 publications

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“…Nocardiopsis NCIM 5124 isolated from an oil-polluted tropical marine environment near Mumbai, India (Dixit and Pant 2000a) and recently identified as N. dassonvillei on the basis of 16 s rDNA sequence similarities (unpublished results) also produced two types of alkaline serine endopeptidases referred to as proteases I and II (Dixit and Pant 2000b). Both the alkaline proteases demonstrated collagenolytic and fibrinolytic activities, and protease I could also degrade elastin.…”

Section: Features Of Proteases Produced By Nocardiopsis Speciesmentioning

confidence: 94%

Nocardiopsis species as potential sources of diverse and novel extracellular enzymes

Bennur

Kumar

Zinjarde

et al. 2014

Appl Microbiol Biotechnol

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Members of the genus Nocardiopsis are generally encountered in locations that are inherently extreme. They are present in frozen soils, desert sand, compost, saline or hypersaline habitats (marine systems, salterns and soils) and alkaline places (slag dumps, lake soils and sediments). In order to survive under these severe conditions, they produce novel and diverse enzymes that allow them to utilize the available nutrients and to thrive. The members of this genus are multifaceted and release an assortment of extracellular hydrolytic enzymes. They produce enzymes that are cold-adapted (α-amylases), thermotolerant (α-amylases and xylanases), thermoalkalotolerant (cellulases, β-1,3-glucanases), alkali-tolerant thermostable (inulinases), acid-stable (keratinase) and alkalophilic (serine proteases). Some of the enzymes derived from Nocardiopsis species act on insoluble polymers such as glucans (pachyman and curdlan), keratin (feathers and prion proteins) and polyhydroxyalkanoates. Extreme tolerance exhibited by proteases has been attributed to the presence of some amino acids (Asn and Pro) in loop structures, relocation of multiple salt bridges to outer regions of the protein or the presence of a distinct polyproline II helix. The range of novel enzymes is projected to increase in the forthcoming years, as new isolates are being continually reported, and the development of processes involving such enzymes is envisaged in the future.

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Section: Features Of Proteases Produced By Nocardiopsis Speciesmentioning

confidence: 94%

Nocardiopsis species as potential sources of diverse and novel extracellular enzymes

Bennur

Kumar

Zinjarde

et al. 2014

Appl Microbiol Biotechnol

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“…Otros autores demostraron la capacidad de producir biosurfactante y bioemulsificante en otras especies de este género como Nocardiopsis alba (Gandhimathi et al 2009) y Nocardiopsis lucentensis (Kiran et al 2010). Por otro lado, Dixit y Pant (2000) reportaron la capacidad degradadora de petróleo de Nocardiopsis sp.…”

Section: Cuadro I Capacidad Para Producir Biosurfactantes Con Propieunclassified

Búsqueda De Capacidad Productora De Biosurfactantes en Actinobacterias Haloalcalófilas Y Haloalcalotolerantes

Lara-Severino

Gómez-Oliván

Trujillo

et al. 2017

Rev. Int. Contam. Ambie.

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Palabras clave: bacteria, emulsificante, tensoactivo, contaminación, biorremediación RESUMENUna opción para biorremediar ambientes salinos contaminados con compuestos orgá-nicos hidrofóbicos, es el uso de microorganismos haloalcalófilos o haloalcalotolerantes capaces de producir biosurfactantes estables y consumir al compuesto hidrófobo. El biosurfactante solubiliza al contaminante haciéndolo biodisponible para el microrganismo. De estudios previos se conocía la capacidad de siete actinobacterias haloalcalotolerantes para transformar el antraceno. En este trabajo, a estas siete más 11 más aisladas de ambientes salinos, se les determinó la capacidad para producir biosurfactantes con propiedades emulsificantes. A las que la mostraron, fueron seleccionadas para saber si utilizaban al antraceno como única fuente de carbono y energía. La capacidad para producir biosurfactante fue determinada por los métodos de actividad hemolítica, gota colapsada y difusión del diámetro de la gota. La propiedad emulsificante y la estabilidad de la emulsión se caracterizaron con el índice de emulsificación y el índice de emulsificación relativo, respectivamente. De 18 actinobacterias evaluadas, cinco cepas mostraron capacidad para producir biosurfactantes con propiedades emulsificantes, alta estabilidad en la emulsión y utilización de antraceno como única fuente de carbono y energía. De estas cinco, dos son haloalcalófilas pertenecientes a la especie Nocardiopsis salina y tres son haloalcalotolerantes pertenecientes a las especies: Kocuria palustris, Microbacterium testaceum y Kocuria rosea. En un estudio previo se determinó la capacidad transformadora de antraceno en las tres cepas haloalcalotolerantes, por lo tanto los resultados de este estudio sugieren proponerlas como candidatas para procesos de biorremediación de ambientes salinos contaminados con compuestos hidrófobos. Asimismo se sugiere determinar la misma capacidad para las dos cepas haloalcalófilas.

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“…In case of soil organic pollution, the intra-and extra-cellular enzymes (dehalogenases, mono-and dioxygenases, peroxidases, phosphotases etc.) of plants and microorganisms are considered to play an important role in degradation of organic pollutants both in the soils and the shoot/root tissues (Dixit and Pant 2000;Susarla et al 2002;Vasileva-Tonkova and Galabova 2003;Wolfe and Hoehamer 2003;Pilon-Smits 2005;Muratova et al 2007). Plants contain a set of specific metabolic isoenzymes and the corresponding genes, some enzymes are involved in oxidations of xenobiotics, while others are associated with xenobiotic metabolism in plant cells, transport of intermediates and compartmentation processes (Macek et al 2000;Pena-Castro et al 2006).…”

Section: Mechanisms Of Plant Resistance To Toxicantsmentioning

confidence: 99%

Plant Resistance to Anthropogenic Toxicants: Approaches to Phytoremediation

Alizade¹,

Alirzayeva²,

Shirvani³

2010

Plant Adaptation and Phytoremediation

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The problem of soil preservation and restoration has became more intense due to continued deterioration of the ecological systems of the world. This problem is especially important for Azerbaijan, where environmental pollution by heavy metals and oil products is increasing. Though the nature of toxicity of these two factors is different, they both affect plant productivity, including agricultural crops and human health. This review is devoted to the analysis of modern conceptions on fundamental physiological mechanisms of plant resistance to toxic levels of heavy metals and organic pollutants in soils, also of their uptake and translocation in plants. Different aspects of the nature of toxicity of metals and petroleum hydrocarbons and genetic basis of plant resistance to them, hyperaccumulation mechanisms of heavy metals by some plant species and approaches to phytoremediation of both inorganic and organic pollutants are discussed.

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Hydrocarbon degradation and protease production by Nocardiopsis sp. NCIM 5124

Cited by 32 publications

References 6 publications

Nocardiopsis species as potential sources of diverse and novel extracellular enzymes

Nocardiopsis species as potential sources of diverse and novel extracellular enzymes

Búsqueda De Capacidad Productora De Biosurfactantes en Actinobacterias Haloalcalófilas Y Haloalcalotolerantes

Plant Resistance to Anthropogenic Toxicants: Approaches to Phytoremediation

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