Streptomyces alkaliphilus sp. nov., isolated from sediments of Lake Elmenteita in the Kenyan Rift Valley

Antonie van Leeuwenhoek
Juliah Khayeli AkhwaleHamadi Iddi Boga

Abstract

A novel strain, designated No. 7(T), was isolated from a sediment sample collected from the alkaline, saline Lake Elmenteita located in the Kenyan Rift Valley. The optimal growth for the strain was found to be at temperature 30-35 °C, at pH 8.0-12.0 in the presence of 7.0-10.0 % (w/v) NaCl. The strain was observed to form a light green beige abundant aerial mycelium on Horikoshi 1 agar and to have morphological and chemotaxonomic characteristics typical of members of the genus Streptomyces. The peptidoglycan was found to contain LL-diaminopimelic acid as the diamino acid, with no diagnostic sugars identified. The predominant menaquinone was identified as MK-9(H6). The main polar lipids were identified as diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylinositol and an unknown phospholipid. Cellular fatty acids were found to consist of saturated branched-chain acids with iso-C(15:0), anteiso-C(15:0), iso-C(16:0) and anteiso-C(17:0) acids predominating. The type strain had a genomic DNA G+C content of 72.8 mol% and formed a distinct phyletic line within the genus Streptomyces. Based on the chemotaxonomic results, 16S rRNA gene sequence analysis and the low DNA-DNA hybridization value with the type strain of Streptomy...Continue Reading

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Citations

Nov 26, 2015·Antonie van Leeuwenhoek·Trupti K SharmaLalitha Sunil Kumar
Jan 20, 2016·Antonie van Leeuwenhoek·Juliah Khayeli AkhwaleHans-Peter Klenk
Oct 29, 2017·Antonie van Leeuwenhoek·Hilal AyNevzat Sahin

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