Abstract
Denitrovibrio acetiphilus Myhr and Torsvik 2000 is the type species of the genus Denitrovibrio in the bacterial family Deferribacteraceae. It is of phylogenetic interest because there are only six genera described in the family Deferribacteraceae. D. acetiphilus was isolated as a representative of a population reducing nitrate to ammonia in a laboratory column simulating the conditions in off-shore oil recovery fields. When nitrate was added to this column undesirable hydrogen sulfide production was stopped because the sulfate reducing populations were superseded by these nitrate reducing bacteria. Here we describe the features of this marine, mesophilic, obligately anaerobic organism respiring by nitrate reduction, together with the complete genome sequence, and annotation. This is the second complete genome sequence of the order Deferribacterales and the class Deferribacteres, which is the sole class in the phylum Deferribacteres. The 3,222,077 bp genome with its 3,034 protein-coding and 51 RNA genes is part of the Genomic Encyclopedia of Bacteria and Archaea project.
Highlights
Strain N2460T (= DSM 12809) is the type strain of the species Denitrovibrio acetiphilus, which is the type species of the genus Denitrovibrio [1]
Reservoir souring by sulfate-reducing bacteria is of great economic concern
Strain N2460T was isolated from a laboratory model column simulating marine anoxic mineral oil reservoir conditions
Summary
Strain N2460T (= DSM 12809) is the type strain of the species Denitrovibrio acetiphilus, which is the type species of the genus Denitrovibrio [1]. Reservoir souring by sulfate-reducing bacteria is of great economic concern. Seawater which naturally contains sulfates is injected into the reservoirs to enhance oil recovery. This sulfate load initiates the growth of sulfate-reducing bacteria producing H2S as the end product of sulfate respiration. Strain N2460T was isolated from a laboratory model column simulating marine anoxic mineral oil reservoir conditions. The aim of these model experiments was to evaluate the feasibility to stop bacterial sulfate reduction by the addition of nitrate. In the laboratory model column from which strain N2460T was isolated, bacterial sulfate reduction with crude oil as carbon and energy source was established first. We present a summary classification and a set of features for D. acetiphilus strain N2460T, together with the description of the complete genome sequencing and annotation
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