Isolation of an extremely halophilic arhaeon Natrialba sp. C21 able to degrade aromatic compounds and to produce stable biosurfactant at high salinity

Extremophiles : Life Under Extreme Conditions
Souad Khemili-TalbiMohamed Lamine Gana

Abstract

Natrialba sp. strain C21 was isolated from oil contaminated saline water in Ain Salah (Algeria) and has exhibited a good potential for degrading phenol (3% v/v), naphthalene (3% v/v), and pyrene (3% v/v) at high salinity with high growth, enzymatic activity and biosurfactant production. Successful metabolism of aromatic hydrocarbon compounds of the strain Natrialba sp. C21 appears to require the ortho-cleavage pathway. Indeed, assays of the key enzymes involved in the ring cleavage of catechol 1, 2-dioxygenase indicated that degradation of the phenol, naphthalene and pyrene by strain Natrialba sp. C21 was via the ortho-cleavage pathway. Cells grown on aromatic hydrocarbons displayed greater ortho-activities mainly towards catechol, while the meta-activity was very low. Besides, biosurfactants derived from the strain C21 were capable of effectively emulsifying both aromatic and aliphatic hydrocarbons and seem to be particularly promising since they have particular adaptations like the increased stability at high temperature and salinity conditions. This study clearly demonstrates for the first time that strain belonging to the genera Natrialba is able to grow at 25% (w/v) NaCl, utilizing phenol, naphthalene, and pyrene as the so...Continue Reading

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Citations

May 27, 2017·Microbiology·Mohammad Ali AmoozegarAntonio Ventosa
Jun 26, 2020·Biofouling·Leonardo Gabriel Di MeglioDébora Nercessian
Apr 10, 2019·Applied Microbiology and Biotechnology·Daniel P BrinkMarie F Gorwa-Grauslund
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Nov 3, 2020·The Science of the Total Environment·Charbel Abou KhalilMichel C Boufadel
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Nov 24, 2020·Frontiers in Microbiology·Avani Bharatkumar PatelDatta Madamwar
Jul 27, 2021·Environmental Monitoring and Assessment·Reyhaneh Kalami, Ahmad-Ali Pourbabaee

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