1. Description of Chloramphenicol Resistant Kineococcus rubinsiae sp. nov. Isolated From a Spacecraft Assembly Facility.
- Author
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Mhatre, Snehit, Singh, Nitin K., Wood, Jason M., Parker, Ceth W., Pukall, Rüdiger, Verbarg, Susanne, Tindall, Brian J., Neumann-Schaal, Meina, and Venkateswaran, Kasthuri
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CHLORAMPHENICOL ,ESTERS analysis ,FATTY acid methyl esters ,SPACE flight propulsion systems ,ARACHIDONIC acid - Abstract
A Gram-positive, coccoid, motile, aerobic bacterium, designated strain B12
T was isolated from a Jet Propulsion Laboratory spacecraft assembly cleanroom, Pasadena, CA, United States. Strain B12T was resistant to chloramphenicol (100 μg/mL), and is a relatively slow grower (3–5 days optimal). Strain B12T was found to grow optimally at 28 to 32°C, pH 7 to 8, and 0.5% NaCl. Fatty acid methyl ester analysis showed that the major fatty acid of the strain B12T was anteiso C15 : 0 (66.3%), which is also produced by other Kineococcus species. However, arachidonic acid (C20 : 4 ω6,9,12,16c) was present in strain B12T and Kineococcus glutinatus YIM 75677T but absent in all other Kineococcus species. 16S rRNA analysis revealed that strain B12T was 97.9% similar to Kineococcus radiotolerans and falls within the Kineococcus clade. Low 16S rRNA gene sequence similarities (<94%) with other genera in the family Kineosporiaceae , including Angustibacter (93%), Kineosporia (94% to 95%), Pseudokineococcus (93%), Quadrisphaera (93%), and Thalassiella (94%) demonstrated that the strain B12T does not belong to these genera. Phylogenetic analysis of the gyrB gene show that all known Kineococcus species exhibited <86% sequence similarity with B12T . Multi-locus sequence and whole genome sequence analyses confirmed that B12T clades with other Kineococcus species. Average nucleotide identity of strain B12T were 75–78% with other Kineococcus species, while values ranged from 72–75% with species from other genera within family Kineosporiaceae. Average amino-acid identities were 66–72% with other Kineococcus species, while they ranged from 50–58% with species from other genera. The dDDH comparison of strain B12T genome with members of genera Kineococcus showed 20–22% similarity, again demonstrating that B12T is distantly related to other members of the genus. Furthermore, analysis of whole proteome deduced from WGS places strain B12T in order Kineosporiales , confirming that strain B12T is a novel member of family Kineosporiaceae. Based on these analyses and other genome characteristics, strain B12T is assigned to a novel species within the genus Kineococcus , and the name Kineococcus rubinsiae sp. nov., is proposed. The type strain is B12T (=FJII-L1-CM-PAB2T ; NRRL B-65556T , DSM 110506T ). [ABSTRACT FROM AUTHOR]- Published
- 2020
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