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Characterization of Diverse Bacteriohopanepolyols in a Permanently Stratified, Hyper-euxinic Lake by Molly D. O'Beirne; Robert Sparkes; Trinity L. Hamilton; Bart E. van Dongen; William P. Gilhooly; Josef P. Werne is a Engineering article available to read on EtoBox.

What is Characterization of Diverse Bacteriohopanepolyols in a Permanently Stratified, Hyper-euxinic Lake about?

Bacteriohopanepolyols (BHPs) are a diverse class of bacterial lipids that hold promise as biomarkers of specific microbes, microbial processes, and environmental conditions. BHPs have been characterized in a variety of terrestrial and aquatic environments, but less is known about their distribution and abundance in extreme environmental systems. In the present study, samples taken from the water column and upper sediments of the hyper-euxinic, meromictic Mahoney Lake (Canada) were analyzed for BHPs. Analyses show distinct BHP distributions within the oxic mixolimnion, the chemocline, and the euxinic monimolimnion. Bacteriohopanetetrol (BHT) and unsaturated BHT are the dominant BHPs found in the oxic mixolimnion and at the chemocline, whereas a novel BHP (tentatively identified as diunsaturated aminotriol) dominates the euxinic monimolimnion. Along with the novel BHP structure, composite BHPs (i.e., BHT-cyclitol ether and BHT-glucosamine) were observed in the euxinic monimolimnion and sediments, indicating their production by anaerobic bacteria. Complementary metagenomic analysis of genes involved in BHP biosynthesis (i.e., shc, hpnH, hpnO, hpnP, and hpnR) further revealed that BHPs

Who reads Characterization of Diverse Bacteriohopanepolyols in a Permanently Stratified, Hyper-euxinic Lake?

Author

Molly D. O'Beirne; Robert Sparkes; Trinity L. Hamilton; Bart E. van Dongen; William P. Gilhooly; Josef P. Werne

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Engineering (Physical Sciences)