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Int J Syst Evol Microbiol 59 (2009), 2247-2253; DOI  10.1099/ijs.0.004267-0
© 2009 International Union of Microbiological Societies

Croceicoccus marinus gen. nov., sp. nov., a yellow-pigmented bacterium from deep-sea sediment, and emended description of the family Erythrobacteraceae

Xue-Wei Xu1,2, Yue-Hong Wu3, Chun-Sheng Wang1,2, Xiao-Gu Wang1,2, Aharon Oren4 and Min Wu3

1 Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration, Hangzhou 310012, PR China
2 Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, PR China
3 College of Life Sciences, Zhejiang University, Hangzhou 310058, PR China
4 Institute of Life Sciences and the Moshe Shilo Minerva Center for Marine Biogeochemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel

Correspondence
Xue-Wei Xu
xuxw{at}sio.org.cn
Min Wu
wumin{at}zju.edu.cn

A Gram-negative, aerobic, neutrophilic, coccoid bacterium, strain E4A9T, was isolated from a deep-sea sediment sample collected from the East Pacific polymetallic nodule region. 16S rRNA gene sequence analysis showed that the isolate was related to the type strain of Altererythrobacter epoxidivorans (96.0 % sequence similarity). Lower 16S rRNA gene sequence similarities were observed with other members of the genera Altererythrobacter (94.7 %), Erythrobacter (94.0–95.4 %), Erythromicrobium (94.8 %) and Porphyrobacter (94.6–95.1 %) of the family Erythrobacteraceae. Phylogenetic analysis including all described species of the family Erythrobacteraceae and several members of the family Sphingomonadaceae revealed that the isolate formed a distinct phylogenetic lineage with the family Erythrobacteraceae. Chemotaxonomic analysis revealed ubiquinone-10 as the predominant respiratory quinone, anteiso-C15 : 0, iso-C14 : 0 and iso-C15 : 0 as major fatty acids, and phosphatidylglycerol as the major polar lipid. The DNA G+C content was 71.5 mol%. The isolate contained carotenoids, but no bacteriochlorophyll a. On the basis of phenotypic and genotypic data presented in this study, strain E4A9T represents a novel species in a new genus in the family Erythrobacteraceae for which the name Croceicoccus marinus gen. nov., sp. nov. is proposed; the type strain is E4A9T (=CGMCC 1.6776T=JCM 14846T).

Abbreviations: BChl a, bacteriochlorophyll a

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain E4A9T is EF623998.

Additional figures showing the phylogenetic tree based on 16S rRNA gene sequences constructed using the maximum-parsimony method, the two-dimensional TLC of the total polar lipids of strain E4A9T and absorption spectra of cells of strain E4A9T are available with the online version of this paper.






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