Kawaguchi R, Burgess J G, Sakaguchi T, Takeyama H, Thornhill R H, Matsunaga T
Center for Molecular Biology and Cytogenetics, SRL, Tokyo, Japan.
FEMS Microbiol Lett. 1995 Mar 1;126(3):277-82. doi: 10.1111/j.1574-6968.1995.tb07430.x.
Most of the 16S ribosomal RNA gene of a sulfate-reducing magnetic bacterium, RS-1, was sequenced, and phylogenetic analysis was carried out. The results suggest that RS-1 is a member of the delta-Proteobacteria, and it appears to represent a new genus. RS-1 is the first bacterium reported outside the alpha-Proteobacteria that contains magnetite inclusions. RS-1 therefore disrupts the correlation between the alpha-Proteobacteria and possession of magnetite inclusions, and that between the delta-Proteobacteria and possession of greigite inclusions. The existence of RS-1 also suggests that intracellular magnetite biomineralization is of multiple evolutionary origins.
对一株硫酸盐还原磁性细菌RS-1的16S核糖体RNA基因的大部分进行了测序，并开展了系统发育分析。结果表明，RS-1是δ-变形菌纲的成员，似乎代表一个新属。RS-1是在α-变形菌纲之外报道的首例含有磁铁矿内含物的细菌。因此，RS-1打破了α-变形菌纲与拥有磁铁矿内含物之间以及δ-变形菌纲与拥有硫复铁矿内含物之间的相关性。RS-1的存在还表明细胞内磁铁矿生物矿化具有多种进化起源。
