Structural characterization, occurrence and fate of archaeal ether-bound acyclic and cyclic biphytanes and corresponding diols in sediments

Schouten, Stefan; Hoefs, Marcel J.L.; Koopmans, Martin P.; Bosch, Hendrik-Jan; Damsté, Jaap S. Sinninghe

doi:10.1016/s0146-6380(98)00131-4

Cited by 144 publications

(111 citation statements)

References 44 publications

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“…The carbon isotopic compositions of XI derived from GDGT XII is highly enriched in 13 C relative to other biphytanes and are consistent with those observed in a wide variety of other settings, in which a pelagic archaeal origin has been inferred (Hoefs et al, 1997;DeLong et al, 1998;Schouten et al, 1998). The ␦ 13 C values of X are intermediate between those of XI and other biphytanes, consistent with the interpretation that X occurs as both a constituent of GDGTs generated by methaneconsuming seep organisms (XVI and XVII) and the aforementioned pelagic GDGT (XII).…”

Section: Occurrence Of Gycerol Tetraethers and Biphytanediolssupporting

confidence: 81%

“…Archaea are distinguished from the Bacteria and Eukarya partly because they contain ether-bound membrane lipids with isoprenoidal carbon skeletons rather than ester-linked alkyl lipids (Woese et al, 1990). Such isoprenoid ether lipids or their degradation products are present in diverse environments (Teixidor et al, 1993;Pauly and van Fleet, 1986;Hoefs et al, 1997;DeLong et al, 1998;Schouten et al, 1998) and been shown to be useful in studying archaeal communities in methane seeps (Hinrichs et al, 1999;Pancost et al, 2000). Additional diagnostic compounds for the Archaea include pentamethylicosane (PMI; Brassell et al, 1981;Schouten et al, 1997) and probably crocetane (Elvert et al, 1999) and the corresponding unsaturated components (Sinninghe Damste et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

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Archaeal lipids in Mediterranean cold seeps: molecular proxies for anaerobic methane oxidation

Pancost

Hopmans

Damsté

2001

Geochimica et Cosmochimica Acta

267

175

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Abstract-We investigated the distributions and ␦ 13 C values of biomarkers for Archaea associated with anaerobic methane oxidation in disparate settings throughout two Eastern Mediterranean mud dome fields. All major classes of archaeal lipids are present in the studied sediments, including isoprenoid glycerol diethers, isoprenoid glycerol dialkyl glycerol tetraethers, and irregular isoprenoid hydrocarbons. Of the compounds present, many, including a novel glycerol tetraether and sn-3-hydroxyarchaeol, have not been previously reported for settings in which methane oxidation is presumed to occur. Archaeal lipids are depleted in 13 C, indicating that the Archaea from which they derive are either directly or indirectly involved with methane consumption. The most widespread archaeal lipids are archaeol, PMI, and glycerol tetraethers, and these compounds are present at all active sites. However, archaeal lipid abundances and distributions are highly variable; ratios of crocetane, PMI, and hydroxyarchaeol relative to archaeol vary from 0 to 6.5, from 0 to 2, and from 0 to 1, respectively. These results suggest that archaeal communities differ amongst the sites examined. In addition, carbon isotopic variability amongst archaeal biomarkers in a given mud breccia can be as large as 24 ‰, suggesting that even at single sites multiple archaeal species perform or are supported by anaerobic methane oxidation.

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Section: Occurrence Of Gycerol Tetraethers and Biphytanediolssupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Archaeal lipids in Mediterranean cold seeps: molecular proxies for anaerobic methane oxidation

Pancost

Hopmans

Damsté

2001

Geochimica et Cosmochimica Acta

267

175

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“…The second eluting compound had a mass spectrum with fragment ions at m/z 95, 151, 163 and 261, and a fragment of m/z 539, likely corresponding to an M þ -15 ion (Figure 3b). The latter would be in agreement with a biphytane carbon skeleton containing four cyclic moieties; the mass spectrum of this compound is quite similar to that of the biphytane containing two cyclopentane moieties and a cyclohexane moiety present in crenarchaeol (Schouten et al, 1998), except that the fragment ions 165 and 263 are now 2 Da lower. These fragments would be consistent with the same biphytane carbon skeleton present in crenarchaeol, but containing an additional cyclopentane moiety at the end of the alkyl chain.…”

Section: Core Lipidssupporting

confidence: 60%

“…GC/MS analysis revealed the presence of two C 40 isoprenoidal hydrocarbons present in approximately equal abundance, indicating that together they comprised the intact GDGT-X. The first eluting isoprenoid had an MS and retention time identical to that of a biphytane with two cyclopentane moieties (de Rosa and Gambacorta, 1988;Hoefs et al, 1997;Schouten et al, 1998), with characteristic fragment ions at m/z 97, 125, 165 and 194, and an M þ ion of m/z 558 (Figure 3a). The second eluting compound had a mass spectrum with fragment ions at m/z 95, 151, 163 and 261, and a fragment of m/z 539, likely corresponding to an M þ -15 ion (Figure 3b).…”

Section: Core Lipidsmentioning

confidence: 96%

Crenarchaeol dominates the membrane lipids of Candidatus Nitrososphaera gargensis, a thermophilic Group I.1b Archaeon

et al. 2009

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Analyses of archaeal membrane lipids are increasingly being included in ecological studies as a comparatively unbiased complement to gene-based microbiological approaches. For example, crenarchaeol, a glycerol dialkyl glycerol tetraether (GDGT) with a unique cyclohexane moiety, has been postulated as biomarker for ammonia-oxidizing Archaea (AOA). Crenarchaeol has been detected in Nitrosopumilus maritimus and ‘Candidatus Nitrosocaldus yellowstonii’ representing two of the three lineages within the Crenarchaeota containing described AOA. In this paper we present the membrane GDGT composition of ‘Candidatus Nitrososphaera gargensis’, a moderately thermophilic AOA, and the only cultivated Group I.1b Crenarchaeon. At a cultivation temperature of 46 °C, GDGTs of this organism consisted primarily of crenarchaeol, its regioisomer, and a novel GDGT. Intriguingly, ‘Ca. N. gargensis’ is the first cultivated archaeon to synthesize substantial amounts of the crenarchaeol regioisomer, a compound found in large relative abundances in tropical ocean water and some soils, and an important component of the TEX86 paleothermometer. Intact polar lipid (IPL) analysis revealed that ‘Ca. N. gargensis’ synthesizes IPLs similar to those reported for the Goup I.1a AOA, Nitrosopumilus maritimus SCMI, in addition to IPLs containing uncharacterized headgroups. Overall, the unique GDGT composition of ‘Ca. N. gargensis’ extends the known taxonomic distribution of crenarchaeol synthesis to the Group I.1b Crenarchaeota, implicating this clade as a potentially important source of crenarchaeol in soils and moderately high temperature environments. Moreover, this work supports the hypothesis that crenarchaeol is specific to all AOA and highlights specific lipids, which may prove useful as biomarkers for ‘Ca. N. gargensis’-like AOA.

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“…They could occur from cleavage of crenarchaeol and other GDGTs or biosynthesized by planktonic archaea (Schouten et al, 1998;Saito and Suzuki, 2010). Some of these are displayed in Figure 6.8.…”

Section: Paleotemperatures Index: Tex 86 and Bit Indexmentioning

confidence: 99%

Archaea

Kornprobst

2014

Encyclopedia of Marine Natural Products

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The article contains sections titled: General Introduction Membrane Lipids Macrocyclic Dialkyl Glycerol Diethers Paleotemperatures Index: TEX 86 and BIT Index Pranylquinones Cyclic Polysulfides Bacteriorhodopsin of Halophiles Extremozymes

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Structural characterization, occurrence and fate of archaeal ether-bound acyclic and cyclic biphytanes and corresponding diols in sediments

Cited by 144 publications

References 44 publications

Archaeal lipids in Mediterranean cold seeps: molecular proxies for anaerobic methane oxidation

Archaeal lipids in Mediterranean cold seeps: molecular proxies for anaerobic methane oxidation

Crenarchaeol dominates the membrane lipids of Candidatus Nitrososphaera gargensis, a thermophilic Group I.1b Archaeon

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