Cyanobacterial bacteriohopanepolyol signatures from cultures and natural environmental settings

Talbot, Helen M.; Summons, Roger E.; Jahnke, L. L.; Cockell, Charles S.; Rohmer, Michel; Farrimond, Paul

doi:10.1016/j.orggeochem.2007.08.006

Cited by 177 publications

(186 citation statements)

References 106 publications

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“…Talbot et al, 2008). Additional early degradation products retaining multiple 122 functional groups derived from BHT or more complex precursors such as BHT cyclitol ether 123 however, it is uncertain if it represents a Pleistocene age signal or one from sub-136 contemporary bacteria feeding on seeping methane.…”

Section: Talbot Et Al 2003a) It Has a Wide Range Of Potential Prokmentioning

confidence: 99%

Polyfunctionalised bio- and geohopanoids in the Eocene Cobham Lignite

Talbot

Bischoff

Inglis

et al. 2016

Organic Geochemistry

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25We investigated the bacteriohopanepolyol (BHP) distribution in the Cobham Lignite 26 sequence (SE England) deposited across the Palaeocene-Eocene boundary including part 27 of the Palaeocene-Eocene Thermal Maximum (PETM) as shown previously by a negative 28 carbon isotope excursion (CIE). A variety of BHPs were identified, including the commonly 29 occurring and non-source specific biohopanoid bacteriohopanetetrol (BHT) and 32, anhydroBHT which was the most abundant polyfunctionalised geohopanoid in the majority of 31 samples. BHPs with a terminal amine functionality, diagnostic biomarkers for methanotrophic 32 bacteria were identified throughout the sequence, with similar distributions in both the lower 33 laminated and upper blocky lignite except that 35-aminobacteriohopanepentol (aminopentol) 34 indicative of Type I methanotrophs (gammaproteobacteria) was generally more abundant in 35 the upper section within the CIE. 36 37The diagenetic fate of these compounds is currently poorly constrained, however, we also 38 identified the recently reported N-containing transformation product anhydroaminotriol and 39 several tentatively assigned novel N-containing structures potentially containing ketone 40 functionalities. Although present throughout the section, there is a sharp peak in the 41 occurrence of these novel compounds correlated with the onset of the CIE and highly 42 isotopically depleted hopanes in the upper part of the laminated lignite, both also correlate 43 well with peak abundance of aminopentol. The significant abundance of these compounds 44 suggests that 35-amino BHPs have their own specific diagenetic pathway, potentially 45 providing an alternative method allowing methanotroph activity to be traced in older samples 46 even if the original biohopanoid markers are no longer present. 47At this time we cannot preclude the possibility that some or all of these BHPs have been 48produced by more recent subsurface activity, post deposition of the lignite to date; however, 49 that would not be expected to generate the observed stratigraphic variability and we suggest 50 that unprecedented observations of a range of highly functionalised biohopanoids in 51 samples of this age could significantly extend the window of their known occurrence. 52

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Section: Talbot Et Al 2003a) It Has a Wide Range Of Potential Prokmentioning

confidence: 99%

Polyfunctionalised bio- and geohopanoids in the Eocene Cobham Lignite

Talbot

Bischoff

Inglis

et al. 2016

Organic Geochemistry

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“…Distribution of microbial terpenoid lipid cyclases A Pearson and DB Rusch distribution of unique polar head groups of bacteriohopanepolyols (Talbot et al, 2003a(Talbot et al, , b, 2007aBednarczyk et al, 2005;Sugden et al, 2005;Talbot et al, 2008). This method is quite promising for interpretations of modern water columns and sediments (Talbot et al, 2003c;Wakeham et al, 2007), but it has limited translation to the geologic record, as much of the information associated with these polar groups is lost through diagenesis.…”

Section: Phylogenetic Analysis Of A-proteobacterial Shcsmentioning

confidence: 99%

Distribution of microbial terpenoid lipid cyclases in the global ocean metagenome

Pearson

Rusch

2008

The ISME Journal

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The bacterial terpenoid lipids known as hopanoids are fundamental tools for interpreting ancient microbial communities. Their degradation products, the hopanes, are found in sedimentary rocks throughout the geologic record. These compounds are presumed to be analogous to the sterols of eukaryotes, yet although the eukaryotic requirement for sterols is universal, hopanoid biosynthetic capacity is not ubiquitous among marine bacteria. Among the 9.8 million shotgun reads from the Sorcerer II Global Ocean Sampling (GOS) expedition, 148 contain putative coding sequence for bacterial squalene-hopene cyclases (SHCs). SHCs encoded by a-Proteobacteria potentially related to Rhodospirillaceae dominate these hits, especially in the open ocean and in tropical regions. Planctomycetes and b-Proteobacteria contribute more SHC-encoding sequences, and therefore presumably more hopanoid production, to coastal and temperate environments. Although sequences nominally related to a-and b-Proteobacteria outnumber other taxa in marine and coastal environments, there is large phylogenetic distance between GOS sequences and known species. Assuming that the environments sampled here are broadly representative of a wide range of surface ocean climates, depositional settings and temporal periods, the data suggest a fundamental function for Proteobacteria in the development of the geologic record of hopanes.

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“…Rohmer et al, 1984;Sinninghe Damsté et al, 2004;Talbot et al, 2008;Eickhoff et al, 2013). Only bacteria containing the gene encoding for squalene hopane cyclase (sqhC; Ochs et al, 1992) are able to biosynthesis hopanoids.…”

Section: Introductionmentioning

confidence: 99%

Bacteriohopanepolyols in tropical soils and sediments from the Congo River catchment area

Spencer-Jones

Wagner

Dinga³

et al. 2015

Organic Geochemistry

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a b s t r a c tThe Congo River basin drains the second largest area of tropical rainforest in the world, including a large proportion of pristine wetlands. We present the bacteriohopanepolyol (BHP) inventory of a suite of tropical soils and, from comparison with published data, propose some initial ideas on BHP distribution controls. Strong taxonomic controls on BHP production are evident in wetland sediments. Dominant within the suite were 35-aminobacteriohopane-31,32,33,34-tetrol (aminotetrol) and 35-aminobacterio hopane-30,31,32,33,34-pentol (aminopentol), indicating aerobic methanotrophy. A narrow range and low mean relative abundance of 30-(5 0 -adenosyl)hopane (adenosylhopane) and related compounds, collectively termed ''soil marker" BHPs, were observed in Congo soils (mean 17%, range 7.9-36% of total BHPs, n = 22) compared with literature data from temperate surface soils and Arctic surface soils (mean 36%, range 0-66% of total BHPs, n = 28) suggesting a greater rate of conversion of these BHP precursors to other structures.

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Cyanobacterial bacteriohopanepolyol signatures from cultures and natural environmental settings

Cited by 177 publications

References 106 publications

Polyfunctionalised bio- and geohopanoids in the Eocene Cobham Lignite

Polyfunctionalised bio- and geohopanoids in the Eocene Cobham Lignite

Distribution of microbial terpenoid lipid cyclases in the global ocean metagenome

Bacteriohopanepolyols in tropical soils and sediments from the Congo River catchment area

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