Nitratifractor salsuginis DSM 16511

Nitratifractor salsuginis (strain DSM 16511 / JCM 12458 / E9I37-1) is a strictly chemolithoautotrophic, denitrifying Gram-negative bacterium isolated from deep-sea hydrothermal vent chimney structures at the Iheya North hydrothermal field in the Mid-Okinawa Trough, Japan. Cells have a mean length of 2.5 mm and a width of approximately 0.6 mm. N. salsuginis grows by respiratory nitrate reduction with H2 as electron donor and nitrate as electron acceptor, forming N2 as a metabolic product. Oxygen, at low concentrations, could serve as an alternative electron acceptor for growth. Growth is observed at temperatures between 28 and 40 degrees Celsius with an optimum at 37.6 degrees Celsius, and at pH values between 5.6 and 7.6, with an optimum at pH 7.0. It is able to grow in the presence of between 1.5 and 3.5% (w/v) NaCl, with an optimum at 3.0. (Adapted from PMID: 15774687). (HAMAP: NITSE)