Genomic analyses reveal a low-temperature adapted clade in Halorubrum, a widespread haloarchaeon across global hypersaline environments ...

• Main Authors: Chen, Liangzhong, Hong, Tao, Wu, Zirui, Song, Weizhi, Chen, Shaoxing X., Liu, Yongqin, Shen, Liang
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: figshare 2023
• Subjects: Genetics; FOS: Biological sciences; Arctic; Antarctic; Antarc*
• Online Access: https://dx.doi.org/10.6084/m9.figshare.c.6815703.v1; https://springernature.figshare.com/collections/Genomic_analyses_reveal_a_low-temperature_adapted_clade_in_Halorubrum_a_widespread_haloarchaeon_across_global_hypersaline_environments/6815703/1

Abstract Background Cold-adapted archaea have diverse ecological roles in a wide range of low-temperature environments. Improving our knowledge of the genomic features that enable psychrophiles to grow in cold environments helps us to understand their adaptive responses. However, samples from typical cold regions such as the remote Arctic and Antarctic are rare, and the limited number of high-quality genomes available leaves us with little data on genomic traits that are statistically associated with cold environmental conditions. Results In this study, we examined the haloarchaeal genus Halorubrum and defined a new clade that represents six isolates from polar and deep earth environments (‘PD group’ hereafter). The genomic G + C content and amino acid composition of this group distinguishes it from other Halorubrum and the trends are consistent with the established genomic optimization of psychrophiles. The cold adaptation of the PD group was further supported by observations of increased flexibility of ...