Marinobacter santoriniensis sp. nov., an arsenate-respiring and arsenite-oxidizing bacterium isolated from hydrothermal sediment
Handley, Kim M. and Héry, Marina and Lloyd, Jonathan R.,, 59, 886-892 (2009),
doi = https://doi.org/10.1099/ijs.0.003145-0,
publicationName = Microbiology Society,
issn = 1466-5026,
abstract= A Gram-negative, arsenate-respiring and arsenite-oxidizing marine bacterium, NKSG1T, was isolated from hydrothermal sediment at Santorini, Greece. Strain NKSG1T was a facultatively anaerobic, motile, non-spore-forming, rod-shaped bacterium. Growth occurred optimally at 35–40 °C, between pH 5.5 and 9.0 and with 0.5–16 % NaCl. Energy was conserved by the aerobic oxidation of a range of complex substrates, carbohydrates and organic acids, or anaerobically by arsenate reduction, nitrate reduction coupled to the oxidation of organic carbon or lactate fermentation. Oxidation of arsenite and anaerobic nitrate-dependent oxidation of Fe(II) were facilitated by the presence of an organic carbon source. The DNA G+C content was 58.1 mol%. The major respiratory quinone was Q-9. The significant fatty acids were 16 : 1ω9c, summed feature 3 (iso-15 : 0 2-OH/16 : 1ω7c), 16 : 0 and 18 : 1ω9c. Analysis of 16S rRNA gene sequences showed that strain NKSG1T fits within the phylogenetic cluster of the genus Marinobacter and is most closely related to Marinobacter koreensis DD-M3T (99.3 % similarity). The degree of relatedness with M. koreensis DSM 17924T based on DNA–DNA hybridization was 56 %. The results of a polyphasic study indicated that strain NKSG1T is a representative of a novel species within the genus Marinobacter, for which the name Marinobacter santoriniensis sp. nov. is proposed. The type strain is NKSG1T (=DSM 21262T =NCIMB 14441T=ATCC BAA-1649T). The capacity for arsenic reduction or oxidation has not been demonstrated previously for this genus.,
language=,
type=