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Solvent tolerance acquired by Brevibacillus brevis during an olive-waste vermicomposting process.

Abstract：

:In this work, a cultivable, Gram-positive, solvent-resistant bacterium was isolated from vermicomposted olive wastes (VOW). The highest 16S rRNA sequence similarity (99%) was found in Brevibacillus brevis. The genome of the isolate, selected for trichloroethylene (TCE)-tolerance, contained a nucleotide sequence encoding a conserved protein domain (ACR_tran) ascribable to the HAE1-RND family. Members of this family are hydrophobic/amphiphilic efflux pumps largely restricted to Gram-negative bacteria. No DNA sequences of HAE1 transporters were detected in the genome of a reference B. brevis strain isolated from natural soil. Since no cultivable solvent-tolerant bacterium was detected in the unvermicomposted olive waste, a transfer of solvent-resistance genes from Gram-negative bacteria during the vermicomposting process could explain the presence of HAE1 transporters in B. brevis isolated from the vermicompost. Under TCE stress conditions, the acquired nucleotide sequence could be translated into proteins, and the tolerance to solvents is conferred to the bacterium. The isolate was designated as strain BEA1 (EF079071).

journal_name

Ecotoxicol Environ Saf

journal_title

Ecotoxicology and environmental safety

authors

Moreno B,Vivas A,Nogales R,Benitez E

doi

10.1016/j.ecoenv.2009.06.011

subject

Has Abstract

pub_date

2009-11-01 00:00:00

pages

2109-14

issue

8

eissn

0147-6513

issn

1090-2414

pii

S0147-6513(09)00133-X

journal_volume

72

pub_type

杂志文章

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