艾丁嗜盐小盒菌B2菌株16S rRNA核苷酸序列

NUCLEOTIDE SEQUENCE OF THE 16S rRNA FROM AN ARCHAEA, HALOARCULA AIDINENS1S STRAIN B_2

艾丁嗜盐小盒菌B2菌株(Haloarcula aidinensis, strain B2)16Sr RNA的核苷酸序列已以双脱氧核苷酸链终止法确定。该菌16Sr RNA显示出了典型的古生物类(Archaea)特性。虽然艾丁嗜盐小盒菌B2菌株在序列方面更接近细菌类(Bacteria)的16SrRNA,但它的序列也显示出与真核生物类(Eucarya)的某些特殊的相似性。在序列和结构方面,该菌与细菌类或真核生物类之间的相似程度要高于细菌类与真核生物类之间的相似程度。另外,该菌16SrRNA的序列与其它嗜盐菌序列相比较支持了以前的结论,即艾丁嗜盐小盒菌B2菌株应属于嗜盐小盒菌属(Haloarcula)的一新种。

The sequence of the 16S rRNA from an Archaea, Haloarcula aidinensis strain B2 (Ha. B2) has been determined by PCR-based sequencing method. The sequence of the archaeal rRNA indicates typical archaeal features. Although Ha. B2 is closer in sequence to bacterial 16S rRNA than to the eucaryal 16S-like rRNA, its sequene shows certain specific similarities to eucaryal counterpart. In sequence and structure, the similarities of the Archaea (Ha. B2) with Bacteria or Eucarya are higher than the similarities between Bacteria and Eucarya. The comparison of this archaeal 16S rRNA sequence with those from other species of various halobacterial genera strongly supports the previous conclusion that the Ha. B2 should belong to a new species of Genus Haloarcula.