Title: The Complete Genome and Physiological Analysis of the Microbialite-Dwelling Agrococcus pavilionensis sp. nov; Reveals Genetic Promiscuity and Predicted Adaptations to Environmental Stress

Journal Article · · Frontiers in Microbiology
 [1];  [2];  [3];  [2];  [4];  [5];  [2];  [6]
  1. Univ. of British Columbia, Vancouver, BC (Canada); Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Univ. of British Columbia, Vancouver, BC (Canada)
  3. McMaster Univ., Hamilton, ON (Canada)
  4. Bay Area Environmental Inst., Petaluma, CA (United States)
  5. Bay Area Environmental Inst., Petaluma, CA (United States); NASA Ames Research Center (ARC), Moffett Field, Mountain View, CA (United States)
  6. Univ. of British Columbia, Vancouver, BC (Canada); Canadian Inst. for Advanced Research, Toronto, ON (Canada)

Members of the bacterial genus Agrococcus are globally distributed and found across highly diverse environments including forests, deserts, potatoes, coal mines, and cheese. Despite their widespread occurrence, the extent of their genetic diversity is poorly explored and no complete reference genomes are available. Using whole-genome analysis, chemotaxonomic markers, morphology, and 16S rDNA phylogeny we characterize the new species Agrococcus pavilionensis strain RW1, and provide the first complete genome from a member of the genus Agrococcus. The A. pavilionensis genome consists of one chromosome (2,627,177 bp) as well as two plasmids (HC-CG1 1,427 bp, and LC-RRW783 31,795 bp) that reveal considerable genetic promiscuity, and include a prophage-like element on the main chromosome, and plasmid genes involved in integration, transposition, and heavy-metal stress. Agrococcus pavilionensis strain RW1 differs from other members of the genus in having a novel phospholipid fatty acid iso-C15:1Δ4, ß-galactosidase activity, filamentous growth under carbon stress, and amygdalin utilization. Both Agrococcus pavilionensis and Agrococcus lahaulensis encode a gene cluster that is likely involved in the synthesis of carotenoids and the production of the characteristic yellow pigmentation found in Agrococcus spp. The widespread occurrence of this genus across a remarkable range of diverse environments, and its genetic plasticity, hints at the ecological significance of Agrococcus spp.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
Canadian Space Agency; USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1708867
Report Number(s):
PNNL-SA--124857
Journal Information:
Frontiers in Microbiology, Journal Name: Frontiers in Microbiology Vol. 9; ISSN 1664-302X
Publisher:
Frontiers Research FoundationCopyright Statement
Country of Publication:
United States
Language:
English

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