![]() ![]() We generated transcriptomes and proteomes of O. ![]() While considerable knowledge has been gained of the symbionts, the host has remained largely unstudied. The gutless marine worm Olavius algarvensis has a completely reduced digestive and excretory system, and lives in an obligate nutritional symbiosis with bacterial symbionts. We propose a model that describes how the versatile metabolism within this symbiotic consortium provides the host with an optimal energy supply as it shuttles between the upper oxic and lower anoxic coastal sediments that it inhabits. Molecular evidence for the uptake and recycling of worm waste products by the symbionts suggests how the more » worm could eliminate its excretory system, an adaptation unique among annelid worms. Shotgun sequencing and metabolic pathway reconstruction revealed that the symbionts are sulphur-oxidizing and sulphate-reducing bacteria, all of which are capable of carbon fixation, thus providing the host with multiple sources of nutrition. Here we use a metagenomic approach to describe four co-occurring symbionts from the marine oligochaete Olavius algarvensis, a worm lacking a mouth, gut and nephridia. Symbioses between bacteria and eukaryotes are ubiquitous, yet our understanding of the interactions driving these associations is hampered by our inability to cultivate most host-associated microbes. Biological andEnvironmental Research OSTI Identifier: 914504 Report Number(s): LBNL-60435 R&D Project: 626809 BnR: KP1103010 TRN: US200809%%284 DOE Contract Number: DE-AC02-05CH11231 Resource Type: Journal Article Journal Name: Nature Additional Journal Information: Journal Volume: 443 Journal Issue: 7114 Related Information: Journal Publication Date: Country of Publication: United States Language: English Subject: 59 ANNELIDS BACTERIA BIOLOGICAL PATHWAYS CARBON METABOLISM NUTRITION RECYCLING SEDIMENTS SULFATE-REDUCING BACTERIA SYMBIOSIS = , (LBNL), Berkeley, CA (United States) Sponsoring Org.: USDOE Director. We propose a model which describes how the versatile metabolism within this symbiotic consortium provides the host with an optimal energy supply as it shuttles between the upper oxic and lower anoxic coastal sediments which it inhabits.Īuthors: Woyke, Tanja Teeling, Hanno Ivanova, Natalia N Hunteman, Marcel Richter, Michael Gloeckner, Frank Oliver Boffelli, Dario Barry, Kerrie W Shapiro, Harris J Anderson, Iain J Szeto, Ernest Kyrpides, Nikos C Mussmann, Marc Amann, Rudolf Bergin, Claudia Ruehland, Caroline Rubin, Edward M Dubilier, Nicole Publication Date: Fri Sep 01 00:00: Research Org.: Lawrence Berkeley National Lab. Molecular evidence for the uptake and recycling of worm waste products by the symbionts suggests how the worm could eliminate its excretory system, an adaptation unique among annelid worms. Shotgun sequencing and metabolic pathway reconstruction revealed that the symbionts are sulfur-oxidizing and sulfate-reducing bacteria, all of which are capable of carbon fixation, providing the host with multiple sources of nutrition. Here, we used a metagenomic approach to describe four co-occurring symbionts from the marine oligochaete Olavius algarvensis, a worm lacking a mouth, gut, and nephridia. ![]() ![]()
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