Halorubrum ejinorense sp. nov., isolated from Lake Ejinor, Inner Mongolia, China

Author:

Castillo A. M.1,Gutiérrez M. C.1,Kamekura M.2,Xue Y.3,Ma Y.3,Cowan D. A.4,Jones B. E.5,Grant W. D.6,Ventosa A.1

Affiliation:

1. Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Sevilla, 41012 Sevilla, Spain

2. Noda Institute for Scientific Research, 399 Noda, Noda-shi, Chiba-ken 278-0037, Japan

3. State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, 100080 Beijing, People's Republic of China

4. Department of Biotechnology, University of the Western Cape, Bellville 7535, Cape Town, South Africa

5. Genencor International BV, Archimedesweg 30, 2333 CN Leiden, The Netherlands

6. Department of Infection, Immunity and Inflammation, University of Leicester, Leicester LE1 9HN, UK

Abstract

A novel halophilic archaeon, strain EJ-32T, was isolated from water from Lake Ejinor in Inner Mongolia, China. The taxonomy of strain EJ-32T was studied by using a polyphasic approach. On the basis of 16S rRNA gene sequence similarities, strain EJ-32T was shown to be phylogenetically related to Halorubrum coriense (97.9 %), Halorubrum trapanicum (97.9 %), Halorubrum sodomense (97.8 %), Halorubrum tebenquichense (97.8 %), Halorubrum xinjiangense (97.6 %), Halorubrum terrestre (97.4 %), Halorubrum distributum (97.1 %) and Halorubrum saccharovorum (96.4 %). Strain EJ-32T was found to be neutrophilic, non-motile and Gram-negative. It grew in medium containing saturation concentrations of NaCl and did not require magnesium for optimal growth. The G+C content of the DNA is 64.0 mol%. Values for DNA–DNA hybridization with respect to phylogenetically related Halorubrum species were ≤49 %, indicating that EJ-32T constitutes a different genospecies. The data show that strain EJ-32T represents a novel species of the genus Halorubrum, for which the name Halorubrum ejinorense sp. nov. is proposed. The type strain is EJ-32T (=CECT 7194T=CGMCC 1.6782T=JCM 14265T).

Publisher

Microbiology Society

Subject

General Medicine,Ecology, Evolution, Behavior and Systematics,Microbiology

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