1887

Abstract

Comparative analysis of 16S rRNA gene sequences, DNA–DNA hybridization data and phenotypic properties revealed that ‘ subsp. ’ strain K1 is not a member of the genus . Phylogenetically, strain K1 is closely related to unclassified strains of the genus : the 16S rRNA gene sequence of strain K1 is similar to that of sp. AGC-2 (99·6 %), sp. 5C (98·9 %) and sp. CLG (98·6 %) and bacterium GSM (99·1 %). The 16S rRNA gene sequence similarity values for strain K1 and species of the genus with validly published names were in the range 92·1–94·6 %, and for VKM B-1269 the value was 87·7 %. SD-11 was also phylogenetically related to strain K1 (92·6 % sequence similarity) and thus belonged to the genus . Chemotaxonomic data, such as the major cell-membrane lipid components of strains K1 and SD-11 (-alicyclic fatty acids) and the major isoprenoid quinone (menaquinone MK-7) of strain K1, supported the affiliation of strains K1 and SD-11 to the genus . Physiological and molecular biological tests allowed genotypic and phenotypic differentiation of strains K1 and SD-11 from the nine species with validly published names. The G+C content of the DNA of strain K1 was 48·7±0·6 mol%; that of strain SD-11 was 53±1 mol%. DNA–DNA reassociation studies showed low relatedness (22 %) between strains K1 and SD-11, and even lower relatedness (3–5 %) between these strains and subsp. ATCC 27009, DSM 446. DNA reassociation of strains K1 and SD-11 with DSM 4006 gave values of 15 and 21, respectively. Based on the phenotypic and phylogenetic characteristics of strains K1 and SD-11, sp. nov. (type strain, K1=VKM B-2304=DSM 16297) and comb. nov. (type strain, SD-11=ATCC 51911=DSM 12064) are proposed.

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2005-03-01
2019-09-22
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vol. , part 2, pp. 941–947

Graphs showing the growth of and oxidation of ferrous iron and glucose consumption by strains VKM B-1269 and K1 , and tables listing the DNA base compositions of various sulfobacilli and alicyclobacilli and the CO fixation by cell suspensions of strain K1 are available to download. [PDF](96KB)



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