Caulobacter inopinatus sp. nov., from seawater off O'ahu, Hawai'i, and emended description of the genus Caulobacter.

IF 2 3区生物学 Q4 MICROBIOLOGY

International journal of systematic and evolutionary microbiology Pub Date : 2025-10-01 DOI:10.1099/ijsem.0.006932

Chiyoko T Onouye, Austin Dubord, Rebecca D Prescott, Thi Hai Au La, Jennifer A Saito, Mia Sadones, Michael H Norris, Stuart P Donachie

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Abstract

A Gram-negative, curved rod and prosthecate bacterium designated as 73W^T was isolated from seawater collected at an O'ahu, Hawai'i beach. Based on 1,468 nt of the strain's 16S rRNA gene, the nearest neighbours are Caulobacter segnis ATCC 21756^T (97.4%), Caulobacter rhizosphaerae 7F14^T (97.5%), Caulobacter vibrioides CB51^T (97.3%), 'Caulobacter zeae' 410^T (1,402/1,440, 97.4%), Caulobacter mirabilis FWC 38^T (1,398/1,435, 97.4%) and 'Caulobacter endophyticus' 774^T (97.3%). Cells are motile by a single polar flagellum. The strain is oxidase and catalase positive, aerobic and microaerophilic and grows between 6 and 39 °C. Major fatty acids in whole cells of 73W^T are cis-11-octadecenoic acid/cis-12-octadecenoic acid (50.6%) and hexadecenoic acid (18.2%). The G+C content of the genome is 67.6%. Based on phenotypic and genotypic differences between strain 73W^T and extant Caulobacter species, we propose that strain 73W^T represents a novel Caulobacter species, for which the name Caulobacter inopinatus sp. nov. is proposed to accommodate strain 73W^T as the type strain (DSM 112346^T=LMG 33179^T=NCTC 14601^T). The description of the genus Caulobacter is emended to reflect the presence in all species of 3-hydroxydodecanoic acid and hexadecanoic acid.

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夏威夷奥胡岛海域的无尾尾杆菌sp. nov.，以及对无尾尾杆菌属的修正描述。

从夏威夷O'ahu海滩收集的海水中分离出一种革兰氏阴性，弯曲杆和检出细菌，命名为73WT。根据该菌株16S rRNA基因的1468个nt，与该菌株最接近的是Caulobacter segnis ATCC 21756T（97.4%）、Caulobacter rhizosphaerae 7F14T（97.5%）、Caulobacter vibriides CB51T（97.3%）、Caulobacter zeae 410T（1402 / 1440, 97.4%）、Caulobacter mirabilis FWC 38T（1398 / 1435, 97.4%）和Caulobacter endophyticus 774T（97.3%）。细胞靠单极鞭毛运动。该菌株为氧化酶和过氧化氢酶阳性，需氧和嗜微氧，生长在6至39°C之间。73WT全细胞主要脂肪酸为顺式-11-十八烯酸/顺式-12-十八烯酸（50.6%）和十六烯酸（18.2%）。基因组中G+C含量为67.6%。根据菌株73WT与现存Caulobacter种的表型和基因型差异，我们提出菌株73WT代表了一种新的Caulobacter种，并建议将其命名为Caulobacter inopinatus sp. nov，以适应菌株73WT作为型菌株（DSM 112346T=LMG 33179T=NCTC 14601T）。对Caulobacter属的描述进行了修订，以反映3-羟基十二烷酸和十六烷酸在所有物种中的存在。

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来源期刊

International journal of systematic and evolutionary microbiology 生物-微生物学

CiteScore

5.20

自引率

21.40%

发文量

426

审稿时长

1 months

期刊介绍： Published by the Microbiology Society and owned by the International Committee on Systematics of Prokaryotes (ICSP), a committee of the Bacteriology and Applied Microbiology Division of the International Union of Microbiological Societies, International Journal of Systematic and Evolutionary Microbiology is the leading forum for the publication of novel microbial taxa and the ICSP’s official journal of record for prokaryotic names. The journal welcomes high-quality research on all aspects of microbial evolution, phylogenetics and systematics, encouraging submissions on all prokaryotes, yeasts, microfungi, protozoa and microalgae across the full breadth of systematics including: Identification, characterisation and culture preservation Microbial evolution and biodiversity Molecular environmental work with strong taxonomic or evolutionary content Nomenclature Taxonomy and phylogenetics.