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Corynebacterium alimapuense sp. nov., an obligate marine actinomycete isolated from sediment of Valparaíso bay, Chile.

Journal article
Authors Fernanda Claverías
Lucia Gonzales-Siles
Francisco Salvà-Serra
Elisabeth Inganäs
Kent Molin
Andrés Cumsille
Agustina Undabarrena
Eduardo Couve
Edward R.B. Moore
Brian J Tindall
Margarita Gomila
Beatriz Camara
Published in International journal of systematic and evolutionary microbiology
Volume 69
Issue 3
Pages 783-790
ISSN 1466-5034
Publication year 2019
Published at Centre for antibiotic resistance research, CARe
Institute of Biomedicine, Department of Infectious Medicine
Pages 783-790
Language en
Links dx.doi.org/10.1099/ijsem.0.003237
www.ncbi.nlm.nih.gov/entrez/query.f...
Subject categories Microbiology

Abstract

A novel Gram-positive, non-motile, non-spore-forming and aerobic bacterium, designated strain VA37-3T, was isolated from a marine sediment sample collected at 19.2 m water depth from Valparaíso bay, Chile. Strain VA37-3T exhibits 97.6 % 16S rRNA gene sequence similarity to Corynebacterium marinum D7015T, 96.4 % to Corynebacterium humireducens MFC-5T and 96 % to Corynebacterium testudinoris M935/96/4T; and a rpoB gene sequence similarity of 85.1 % to Corynebacterium pollutisoli VMS11T, both analyses suggesting that strain VA37-3T represents a novel species of Corynebacterium. Physiological testing indicated that strain VA37-3T requires artificial sea water or sodium-supplemented media for growth, representing the first obligate marine actinomycete of the genus Corynebacterium. The genome of the proposed new species, along with the type strains of its most closely related species were sequenced and characterized. In silico genome-based similarity analyses revealed an ANIb of 72.8 % (C. marinum D7015T), ANIm of 85.0 % (Corynebacterium mustelae DSM 45274T), tetra of 0.90 (Corynebacterium callunae DSM 20147T) and ggdc of 24.7 % (Corynebacterium kutscheri DSM 20755T) when compared with the closest related strains. The genomic DNA G+C content of strain VA37-3T was 57.0 %. Chemotaxonomic assessment of strain VN6-2T showed the major fatty acids were C18 : 1ω9c and C16 : 0. Menaquinones predominantly consisted of MK-8(II-H2). Polar lipids consisted of diphosphatidylglycerol, glycolipids, phosphatidylglycerol, phosphoglycolipid and phosphatidylinositol. Mycolic acids also were present. Overall, the results from phylogenetic, phenotypic and genomic analyses confirmed that strain VA37-3T represents a novel species of the genus Corynebacterium, for which the name Corynebacterium alimapuense sp. nov. is proposed, with VA37-3T as the type strain (=CCUG 69366T=NCIMB 15118T).

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