globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gbi.12253
Scopus记录号: 2-s2.0-85031493780
论文题名:
Lipidomics of the sea sponge Amphimedon queenslandica and implication for biomarker geochemistry
作者: Gold D.A.; O'Reilly S.S.; Watson J.; Degnan B.M.; Degnan S.M.; Krömer J.O.; Summons R.E.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2017
卷: 15, 期:6
起始页码: 836
结束页码: 843
语种: 英语
Scopus关键词: alga ; biochemical composition ; biomarker ; fatty acid ; geochemistry ; lipid ; microbial community ; sponge ; sterol ; algae ; Amphimedon ; Animalia
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences ; Environmental Science: General Environmental Science ; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: Demosponges are a rich natural source of unusual lipids, some of which are of interest as geochemical biomarkers. Although demosponges are animals, they often host dense communities of microbial symbionts, and it is therefore unclear which lipids can be synthesized by the animal de novo, and which require input from the microbial community. To address this uncertainty, we analyzed the lipids of Amphimdeon queenslandica, the only demosponge with a published genome. We correlated the genetic and lipid repertoires of A. queenslandica to identify which biomarkers could potentially be synthesized and/or modified by the sponge. The fatty acid profile of A. queenslandica is dominated by an unusual Δ5,9 fatty acid (cis-5,9-hexacosadienoic acid)—similar to what has been found in other members of the Amphimdeon genus—while the sterol profile is dominated by C27-C29 derivatives of cholesterol. Based on our analysis of the A. queenslandica genome, we predict that this sponge can synthesize sterols de novo, but it lacks critical genes necessary to synthesize basic saturated and unsaturated fatty acids. However, it does appear to have the genes necessary to modify simpler products into a more complex “algal-like” assemblage of unsaturated fatty acids. Ultimately, our results provide additional support for the poriferan affinity of 24-isopropylcholestanes in Neoproterozoic-age rocks (the “sponge biomarker” hypothesis) and suggest that some algal proxies in the geochemical record could also have animal contributions. © 2017 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85038
Appears in Collections:影响、适应和脆弱性

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作者单位: Department of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology, Cambridge, MA, United States; School of Biological Sciences, University of Queensland, Brisbane, QLD, Australia; Department for Solar Materials, Helmholtz Center for Environmental Research GmbH - UFZ, Leipzig, Germany; Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, United States; School of Earth Sciences, University College Dublin, Belfield, Ireland

Recommended Citation:
Gold D.A.,O'Reilly S.S.,Watson J.,et al. Lipidomics of the sea sponge Amphimedon queenslandica and implication for biomarker geochemistry[J]. Geobiology,2017-01-01,15(6)
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