Paracoccus siganidrum sp. nov., isolated from fish gastrointestinal tract

Abstract

A bacterial strain, designated M26(T), was isolated from a fish gastrointestinal tract, collected from Zhanjiang Port, South China. 16S rRNA gene sequence analysis indicated that strain M26(T) belongs to the subclass α-Proteobacteria, being related to the genus Paracoccus, and sharing highest sequence similarity with Paracoccus alcaliphilus JCM 7364(T) (98.1 %), Paracoccus huijuniae FLN-7(T) (97.3 %), Paracoccus stylophorae KTW-16(T) (97.1 %) and Paracoccus seriniphilus DSM 14827(T) (96.9 %). The major quinone was determined to be ubiquinone Q-10, with Q-9 and Q-8 as minor components. The major fatty acid was identified as C18:1ω7c, with smaller amounts of C18:0 and C16:0. The G+C content of the genomic DNA was determined to be 64.3 mol%. The DNA hybridization value between strain M26(T) and the most closely related type strain, P. alcaliphilus, was 29.0 ± 1.0 %. The results of physiological and biochemical tests and low DNA-DNA relatedness showed that the strain could be readily distinguished from closely related species. On the basis of these phenotypic and genotypic data, strain M26(T) is concluded to represent a novel species of the genus Paracoccus, for which the name Paracoccus siganidrum sp. nov. is proposed. The type strain is M26(T) (=CCTCC AB 2012865(T) = DSM 26381(T)).

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“…Samples S1 and S2 showed certain similarities, as the most dominant genus in both samples was Paracoccus. Paracoccus siganidrum was identified in both samples, and this species was isolated from the fish gastrointestinal tract (Liu et al 2013). In addition, Paracoccus sanguinis was identified only in S1 and Paracoccus yeei only in S2.…”

Paracoccus angustae sp. nov., isolated from soil

“…Members of the genus Paracoccus are Gram-stain-negative, are positive for oxidase and catalase, and have a high metabolic versatility, C 18 : 1 ω7 c as the major fatty acid and ubiquinone-10 (Q-10) as the predominant respiratory quinone (Dastager et al , 2011; Sheu et al , 2011). In addition, members of the genus have high DNA G+C contents and have phosphatidylglycerol and phosphatidylcholine as major polar lipids (Liu et al , 2008; Roh et al , 2009; Fu et al , 2011; Sheu et al , 2011; Kämpfer et al , 2012; Lee & Lee, 2013; Liu et al , 2013; Sun et al , 2013; Zhu et al , 2013; Pan et al , 2014; Zhang et al , 2014). Some strains can accumulate poly-β-hydroxybutyrate granules (Berry et al , 2003; Sheu et al , 2011; Lee & Lee, 2013; Pan et al , 2014).…”

Paracoccus marinaquae sp. nov., isolated from coastal water of the Yellow Sea

“…The diversity of methylotrophy in the genus Paracoccus at the biochemical and genetic levels was described by Czarnecki (Czarnecki and Bartosik 2019), including an examination of the origin and evolution of C1 metabolism in this group of bacteria. In addition, P. denitri cans (Robertson and Kuenen 1984) is one of the earliest aerobic denitrifying bacteria and most species of the genus Paracoccus are positive for the reduction of nitrate (Chen et al 2020;Liu et al 2013). Interestingly, there is a butachlor-degrading strain Paracoccus sp.…”