Paracoccus liaowanqingii sp. nov., isolated from Tibetan antelope (Pantholops hodgsonii)

Abstract

Two strains, designated 2251T and 3058, that were aerobic, Gram-stain-negative, non-motile, coccoid or short rod-shaped bacilli, have recently been isolated from Tibetan antelopes on the Qinghai-Tibet Plateau. The results of phylogenetic analyses of 16S rRNA gene sequences indicated that strains 2251T and 3058 represent a new species within the genus Paracoccus and are most similar to ‘ Paracoccus gahaiensis ’ CUG00006T (98.9 and 99.3 %), Paracoccus nototheniae I-41R45T (98.3 and 98.7 %) and Paracoccus hibiscisoli THG-T2.31T (97.6 and 97.8 %). Results of genomic sequence-based phylogenomic analysis agreed with those from 16S rRNA gene sequence analysis. Optimal growth was achieved at pH 7.0–7.5 and 28 °C with marine medium. Cells contained C18 : 1 ω7c as the major cellular fatty acid and ubiquinone-10 as the predominant menaquinone. The polar lipids comprised phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylglycerol, phospholipid, glycolipid and an unidentified lipid. The cell-wall peptidoglycan amino acids were meso-2,6-diaminopimelic acid, alanine and glutamic acid; the major cell-wall sugar was galactose. The G+C content of strain 2251T was 66.5 mol%. Both strains (2251T and 3058) had DNA–DNA relatedness values less than 50 % with all available genomes of the genus Paracoccus in the ncbi database. Differential genotypic inferences, together with phenotypic and biochemical characteristics, demonstrated that strains 2251T and 3058 should be classified as a novel species of the genus Paracoccus , for which the name Paracoccus liaowanqingii sp. nov. is suggested. The type strain is 2251T (=CGMCC 1.16490T=DSM 106269T).

Paracoccus salsus sp. nov., a novel slightly halophilic bacterium isolated from saline lake sediment

“…The taxonomic name of the genus Paracoccus originated from the cell morphology, as strains in the genus are often coccoid [6, 8]. All members of the genus Paracoccus contain Q-10 as the major respiratory quinone [4, 5, 7, 9, 10] and the genome size ranges from 3.0 to 5.3 Mb. The type strain of this genus, P.…”

Paracoccus alkanivorans sp. nov., isolated from a deep well with oil reservoir water

“…At the time of writing, the genus Paracoccus comprises 67 species with validly published names (www.bacterio.net; 11 new species have not been included before 29 November 2019). The latest described species are Paracoccus luteus isolated from the intestine of grass carp [5] and Paracoccus liaowanqingii isolated from Tibetan antelope [6]. According to the latest version, Paracoccus is described as Gram-stain-negative, non-motile, oxidase-positive and catalase-positive.…”

Paracoccus albicereus sp. nov., isolated from the shallow-sea hydrothermal system off Kueishantao Island

“…At the time of writing, the genus Paracoccus has contained 78 recognized species with validly published names (search time: 25 February 2023, http://www.bacterio.net/paracoccus.html) [2]. Species of genus Paracoccus were isolated from various environments, including freshwater [3], seawater [4], air [5], soil [6], tidal flat sediment [7], activated sludge [8], sediment [9], plant [10] and Tibetan antelope [11]. The members of Paracoccus share some common features, including having ubiquinone 10 as the dominant isoprenoid quinone, C 18 : 1 ω 7 c as the major fatty acid [12], and DNA G+C content between 64–70 % [13].…”