# Complete genome sequence of a novel Prescottella sp. R16 isolate from deep-sea sediments in the western Pacific

## TL;DR

Scientists discovered a new Prescottella species from deep-sea sediments and sequenced its genome, revealing potential for antibiotic production.

## Contribution

The discovery and genomic characterization of a novel Prescottella species isolated from deep-sea sediments.

## Key findings

- Prescottella sp. R16 has a circular chromosome with 4,208 protein-coding genes and 12 rRNA operons.
- The genome contains 13 putative biosynthetic gene clusters for secondary metabolites, suggesting antibiotic production potential.
- Genomic islands and CRISPRs were identified, indicating genetic adaptability and defense mechanisms.

## Abstract

Prescottella, a distinct genus separate from Rhodococcus, has garnered attention for its adaptability and ecological versatility. In this study, a Gram-stain positive and ovoid-rod shaped the actinobacterium strain R16 was isolated from deep-sea sediment (with a depth of 6,310 m) in the Western Pacific. On the basis of 16S rRNA gene sequence analysis, average nucleotide identity and phylogenomic analysis, strain R16 clearly represents a novel species within the genus Prescottella. Genomic analyses indicate Prescottella sp. R16 contains a circular chromosome of 4,531,251 bp with an average GC content of 68.9%, 4,208 protein-coding genes, 51 tRNA genes, and 12 rRNA operons. Additionally, four CRISPRs and 24 genomic islands are also identified. The presence of rich categories related to catalytic activity, membrane part and metabolic process highlights their involvement in cellular component, biological process, and molecular function. The genome sequence of strain R16 also revealed the presence of 13 putative biosynthetic gene clusters for secondary metabolites, including those for ε-Poly-L-lysine, ectoine, heterobactin, isorenieratene and corynecin, suggesting its potential for antibiotic production and warranting further exploration.