Nocardiopsis mwathae sp. nov., isolated from the haloalkaline Lake Elmenteita in the African Rift Valley

Antonie van Leeuwenhoek
Juliah Khayeli AkhwaleHans-Peter Klenk

Abstract

During a screening for novel and biotechnologically useful bacteria in haloalkaline lakes, strain No.156(T) was isolated from a sediment sample from lake Elmenteita in the African Rift Valley and studied by a polyphasic taxonomic approach. The strain was observed to form yellow aerial and substrate mycelia; optimal growth was found to be at 30-35 °C in salt concentrations of 6-9 % (w/v) and at pH 7-9. The DNA G+C content of the novel strain was 71 mol%. Analysis of 16S rRNA sequences indicated that the isolate belongs to the genus Nocardiopsis with sequence similarities below 98 % to the type strains of all other representatives of the genus. Mycolic acids were not detected in whole cell methanolysates. The peptidoglycan was found to contain meso-diaminopimelic acid as the diamino acid with no diagnostic sugars. The main polar lipids were identified as phosphatidylmethylethanolamine, phosphatidylcholine, phosphatidylglycerol and phosphatidylinositol but no diphosphatidylglycerol. The predominant menaquinones were MK-11(H8), MK-11(H6), MK-10(H8) and MK-10(H6). Cellular fatty acids were found to consist of saturated and monounsaturated iso- and anteiso-branched acids with 16-18 C-length, tuberculostearic acid (Me18:0), and straig...Continue Reading

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Jun 1, 2013·Antonie van Leeuwenhoek·María del Carmen Montero-CalasanzHans-Peter Klenk
Jun 7, 2013·Bioinformatics·Lea A I VaasMarkus Göker
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Citations

Aug 18, 2016·International Journal of Systematic and Evolutionary Microbiology·Aharon Oren, George M Garrity
Sep 11, 2016·International Journal of Systematic and Evolutionary Microbiology·Yong-Guang ZhangWen-Jun Li
Oct 10, 2018·Archives of Microbiology·Bing HuangChangting Liu

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Bacterial cell walls are made of peptidoglycan (also called murein), which is made from polysaccharide chains cross-linked by unusual peptides containing D-amino acids. Here is the latest research on bacterial cell wall structures.

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