Natronococcus amylolyticus sp. nov., a haloalkaliphilic archaeon.
The alpha-amylase-producing haloalkaliphilic archaeon Natronococcus sp. strain Ah-36T (T = type strain) was isolated previously from a Kenyan soda lake, Lake Magadi. Most cells of strain Ah-36T occurred in irregular clusters, and the colonies were orange-red. The polar lipids of this organism were composed of C20, C20 and C20, C25 derivatives of phosphatidylglycerol and phosphatidylglycerophosphate. Phosphatidylglycero-(cyclo-) phosphate, which is characteristic of Natronococcus occultus, was not detected. The complete nucleotide sequence of the 16S rRNA gene revealed that the closest relative of strain Ah-36T is N. occultus ATCC43101T (level of similarity, 96.4%), an extremely halophilic archaeon. However, strain Ah-36T did not exhibit a significant level of DNA homology to N. occultus ATCC43101T, which represents the only previously described species in the genus Natronococcus. We describe a new species for strain Ah-36T, for which we propose the name Natronococcus amylolyticus.
Kanal
H
H
Department of Bioengineering, Tokyo Institute of Technology, Kanagawa, Japan.
Kobayashi
T
T
Aono
R
R
Kudo
T
T
D001105:Archaea / Q000145:classification* / Q000235:genetics; D001483:Base Sequence; D004269:DNA, Bacterial / Q000737:chemistry; D004275:DNA, Ribosomal / Q000737:chemistry; D008969:Molecular Sequence Data; D012336:RNA, Ribosomal, 16S / Q000235:genetics
D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S