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新型嗜盐古菌 Natrinema thermophila 具有嗜盐古菌中最高的生长温度和最大的基因组大小。

Novel haloarchaeon Natrinema thermophila having the highest growth temperature among haloarchaea with a large genome size.

机构信息

Microbiology and Functionality Research Group, World Institute of Kimchi, Gwangju, 61755, Republic of Korea.

Department of Food Science and Engineering, Ewha Womans University, Seoul, 03760, Republic of Korea.

出版信息

Sci Rep. 2018 May 17;8(1):7777. doi: 10.1038/s41598-018-25887-7.

Abstract

Environmental temperature is one of the most important factors for the growth and survival of microorganisms. Here we describe a novel extremely halophilic archaeon (haloarchaea) designated as strain CBA1119 isolated from solar salt. Strain CBA1119 had the highest maximum and optimal growth temperatures (66 °C and 55 °C, respectively) and one of the largest genome sizes among haloarchaea (5.1 Mb). It also had the largest number of strain-specific pan-genome orthologous groups and unique pathways among members of the genus Natrinema in the class Halobacteria. A dendrogram based on the presence/absence of genes and a phylogenetic tree constructed based on OrthoANI values highlighted the particularities of strain CBA1119 as compared to other Natrinema species and other haloarchaea members. The large genome of strain CBA1119 may provide information on genes that confer tolerance to extreme environmental conditions, which may lead to the discovery of other thermophilic strains with potential applications in industrial biotechnology.

摘要

环境温度是微生物生长和存活的最重要因素之一。在这里,我们描述了一种新型的极端嗜盐古菌(嗜盐菌),该古菌被命名为 CBA1119 菌株,从日晒盐中分离得到。CBA1119 菌株的最高和最适生长温度分别为 66°C 和 55°C,是嗜盐菌中基因组最大的菌株之一(5.1Mb)。它还具有在 Halobacteria 目中的 Natrinema 属成员中最多的菌株特异性泛基因组直系同源物和独特的途径。基于基因的存在/不存在构建的系统发育树和基于 OrthoANI 值构建的系统发育树突出了 CBA1119 菌株与其他 Natrinema 种和其他嗜盐菌成员的特殊性。CBA1119 菌株的大型基因组可能提供了与耐受极端环境条件相关的基因信息,这可能会导致发现其他具有工业生物技术应用潜力的嗜热菌株。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/47e3/5958107/35d66d436206/41598_2018_25887_Fig1_HTML.jpg

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