Thermococcus fumicolans sp. nov., a new hyperthermophilic archaeon isolated from a deep-sea hydrothermal vent in the north Fiji Basin

Int J Syst Bacteriol. 1996 Oct;46(4):1113-9. doi: 10.1099/00207713-46-4-1113.


An extremely thermophilic archaeon, strain ST557T (T = type strain), was isolated from a deep-sea hydrothermal vent in the North Fiji Basin. This strain is a strictly anaerbic coccus whose cells are about 0.8 to 2 microns in diameter. The optimum temperature, pH and sea salt concentration for growth are 85 degrees C, 8.5, and 20 to 40 g/liter, respectively. Strain ST557T grows preferentially in the presence of elemental sulfur on proteinaceous substrates and on a mixture of 20 amino acids. It grows slowly on pyruvate and maltose. Growth is inhibited by rifampin. The DNA G + C content is 54 to 55 mol%. Sequencing of the 16S rRNA gene revealed that strain ST557T belongs to the genus Thermococcus. We propose that this organism should be placed in a new species, Thermococcus fumicolans.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Archaea / drug effects
  • Archaea / growth & development
  • Archaea / isolation & purification*
  • Base Sequence
  • DNA, Bacterial / analysis
  • Lipids / analysis
  • Molecular Sequence Data
  • RNA, Ribosomal, 16S / chemistry
  • Temperature
  • Water Microbiology*


  • DNA, Bacterial
  • Lipids
  • RNA, Ribosomal, 16S

Associated data

  • GENBANK/D14876
  • GENBANK/D37982
  • GENBANK/D45214
  • GENBANK/L19921
  • GENBANK/M21087
  • GENBANK/U20163
  • GENBANK/X03235
  • GENBANK/Z70250
  • GENBANK/Z70251
  • GENBANK/Z75233