College of Science and Technology, Bellevue University, 1000 Galvin Rd. S., Bellevue, NE, 68005, USA.
Arch Microbiol. 2021 Sep;203(7):4525-4538. doi: 10.1007/s00203-021-02443-y. Epub 2021 Jun 20.
Cellulosimicrobium strain SE3 was isolated from the San Elijo coastal lagoon near San Diego. A whole genome-based phylogenetic comparison shows great heterogeneity within the Cellulosimicrobium genus. Based on average nucleotide identity, whole genome-based comparison, and the presence of a unique L-fucose metabolic pathway, strain SE3 was shown to belong to a novel species within the genus, together with five other strains. The name Cellulosimicrobium fucosivorans sp. nov. is proposed, with strain SE3 as the type strain. The strain encodes a unique alpha-L-fucosidase and the L-fucose metabolic pathway is homologous to the one recently described in Campylobacter jejuni. C. fucosivorans is able to grow on L-fucose, and interestingly, the biosynthesis of the yellow carotenoid is dependent on the presence of L-fucose in the media. The ability to metabolize fucose and the linked production of carotenoids are expected to provide C. fucosivorans with a competitive advantage in the sunny coastal lagoon area.
纤维素微菌 SE3 株从圣地亚哥附近的圣埃利霍沿海泻湖分离得到。基于全基因组的系统发育比较显示，纤维素微菌属内存在很大的异质性。根据平均核苷酸同一性、全基因组比较以及独特的 L-岩藻糖代谢途径的存在，SE3 株被证明属于该属内的一个新种，与其他五株菌一起。提议使用纤维素微菌 L-岩藻糖降解菌 sp. nov. 作为新种的名称，SE3 株为其模式菌株。该菌株编码一种独特的α-L-岩藻糖苷酶，并且 L-岩藻糖代谢途径与最近在空肠弯曲菌中描述的途径同源。C. fucosivorans 能够在 L-岩藻糖上生长，有趣的是，黄色类胡萝卜素的生物合成依赖于培养基中 L-岩藻糖的存在。代谢岩藻糖的能力和相关的类胡萝卜素的产生预计将为 C. fucosivorans 在阳光充足的沿海泻湖地区提供竞争优势。
