NDLI: Amino acid-assimilating phototrophic heliobacteria from soda lake environments: Heliorestis acidaminivorans sp. nov. and ‘Candidatus Heliomonas lunata’

Content Provider	Springer Nature Link
Author	Asao, Marie Takaichi, Shinichi Madigan, Michael T.
Copyright Year	2012
Abstract	Two novel taxa of heliobacteria, Heliorestis acidaminivorans sp. nov. strain HR10BT and ‘Candidatus Heliomonas lunata’ strain SLH, were cultured from shoreline sediments/soil of Lake El Hamra (Egypt) and lake water/benthic sediments of Soap Lake (USA), respectively; both are highly alkaline soda lakes. Cells of strain HR10B were straight rods, while cells of strain SLH were curved rods. Both organisms were obligate anaerobes, produced bacteriochlorophyll g, and lacked intracytoplasmic photosynthetic membrane systems. Although the absorption spectrum of strain HR10B was typical of other heliobacteria, that of strain SLH showed unusually strong absorbance of the OH-chlorophyll a component. Major carotenoids of both organisms were OH-diaponeurosporene glucosyl esters, as in other alkaliphilic heliobacteria, and both displayed an alkaliphilic and mesophilic phenotype. Strain HR10B was remarkable among heliobacteria in its capacity to photoassimilate a number of carbon sources, including several amino acids. Nitrogenase activity was observed in strain HR10B, but not in strain SLH. The 16S ribosomal RNA gene tree placed strain HR10B within the genus Heliorestis, but distinct from other described species. By contrast, strain SLH was phylogenetically more closely related to neutrophilic heliobacteria and is the first alkaliphilic heliobacterium known outside of the genus Heliorestis.
Starting Page	585
Ending Page	595
Page Count	11
File Format	PDF
ISSN	14310651
Journal	Extremophiles
Volume Number	16
Issue Number	4
e-ISSN	14334909
Language	English
Publisher	Springer Japan
Publisher Date	2012-05-16
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Anoxygenic phototrophic bacteria Heliobacteria Bacteriochlorophyll g Alkaliphiles Soda lakes Extreme environments Biotechnology Microbiology Ecology
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Medicine Microbiology

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