Base de dados : MEDLINE
Pesquisa : B01.050.500.644.080.537 [Categoria DeCS]
Referências encontradas : 177 [refinar]
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  1 / 177 MEDLINE  
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[PMID]:28558648
[Au] Autor:Ho PT; Park E; Hong SG; Kim EH; Kim K; Jang SJ; Vrijenhoek RC; Won YJ
[Ad] Endereço:Interdisciplinary Program of EcoCreative, The Graduate School, Ewha Womans University, Seoul, 03760, Korea.
[Ti] Título:Geographical structure of endosymbiotic bacteria hosted by Bathymodiolus mussels at eastern Pacific hydrothermal vents.
[So] Source:BMC Evol Biol;17(1):121, 2017 May 30.
[Is] ISSN:1471-2148
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Chemolithoautotrophic primary production sustains dense invertebrate communities at deep-sea hydrothermal vents and hydrocarbon seeps. Symbiotic bacteria that oxidize dissolved sulfur, methane, and hydrogen gases nourish bathymodiolin mussels that thrive in these environments worldwide. The mussel symbionts are newly acquired in each generation via infection by free-living forms. This study examined geographical subdivision of the thiotrophic endosymbionts hosted by Bathymodiolus mussels living along the eastern Pacific hydrothermal vents. High-throughput sequencing data of 16S ribosomal RNA encoding gene and fragments of six protein-coding genes of symbionts were examined in the samples collected from nine vent localities at the East Pacific Rise, Galápagos Rift, and Pacific-Antarctic Ridge. RESULTS: Both of the parapatric sister-species, B. thermophilus and B. antarcticus, hosted the same numerically dominant phylotype of thiotrophic Gammaproteobacteria. However, sequences from six protein-coding genes revealed highly divergent symbiont lineages living north and south of the Easter Microplate and hosted by these two Bathymodiolus mussel species. High heterogeneity of symbiont haplotypes among host individuals sampled from the same location suggested that stochasticity associated with initial infections was amplified as symbionts proliferated within the host individuals. The mussel species presently contact one another and hybridize along the Easter Microplate, but the northern and southern symbionts appear to be completely isolated. Vicariance associated with orogeny of the Easter Microplate region, 2.5-5.3 million years ago, may have initiated isolation of the symbiont and host populations. Estimates of synonymous substitution rates for the protein-coding bacterial genes examined in this study were 0.77-1.62%/nucleotide/million years. CONCLUSIONS: Our present study reports the most comprehensive population genetic analyses of the chemosynthetic endosymbiotic bacteria based on high-throughput genetic data and extensive geographical sampling to date, and demonstrates the role of the geographical features, the Easter Microplate and geographical distance, in the intraspecific divergence of this bacterial species along the mid-ocean ridge axes in the eastern Pacific. Altogether, our results provide insights into extrinsic and intrinsic factors affecting the dispersal and evolution of chemosynthetic symbiotic partners in the hydrothermal vents along the eastern Pacific Ocean.
[Mh] Termos MeSH primário: Bactérias/classificação
Fontes Hidrotermais
Mytilidae/microbiologia
[Mh] Termos MeSH secundário: Animais
Regiões Antárticas
Bactérias/genética
Evolução Biológica
Genética Populacional
Hibridização Genética
Mytilidae/classificação
Mytilidae/genética
Mytilidae/fisiologia
Oceano Pacífico
Filogenia
RNA Ribossômico 16S/genética
Simbiose
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (RNA, Ribosomal, 16S)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171012
[Lr] Data última revisão:
171012
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170601
[St] Status:MEDLINE
[do] DOI:10.1186/s12862-017-0966-3


  2 / 177 MEDLINE  
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[PMID]:28412626
[Au] Autor:Ravaschiere A; Cutler C; Edleson K; Halem Z; Magun H; Meckler F; Cox R
[Ad] Endereço:Lisman Laboratories, Riverdale Country School, 5250 Fieldston Rd., Bronx, NY 10471, USA.
[Ti] Título:Quantification of heat shock protein 70 and acetylcholinesterase over a time course suggests environmental adaptation in a foundational molluscan species.
[So] Source:Ecotoxicol Environ Saf;142:222-229, 2017 Aug.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Waterways in urban areas often act as repositories for sewage, industrial waste, and environmental contaminants. In response, inhabitants of these watersheds undergo physiological adaptations specific to their respective environments. Effects of these stressors can be assayed by quantification of various well-documented biomarkers in sentinel species such as the Atlantic Ribbed mussel, Geukensia demissa, a native to the Bronx River Estuary, Bronx, NY, USA. Heat shock protein 70 (Hsp70) is a universally expressed biomarker for an array of environmental stressors including toxins and low dissolved oxygen. To better understand the mechanisms by which organisms tolerate their contaminated environments, we monitored the constitutive and heat shock-induced levels of two proteins: Hsp70 and acetylcholinesterase (AChE) in natural populations of G. demissa from differentially impacted sites: the Bronx River and Greenwich Cove estuaries. We show that G. demissa from the Bronx River exhibits a higher level of constitutive Hsp70, and launches a more rapid and robust heat shock response than does its Greenwich Cove counterpart. In addition, AChE levels are recovered more quickly in Bronx River mussels. Based on response pattern investigations from heat stress as well as constitutive expression, we suggest that the Hsp70/AChE chaperone/client relationship exemplifies the unique adaptive mechanisms utilized by organisms in order to tolerate environmentally impacted habitats. Results from this study offer important insights from an ecological perspective into the molecular and cellular basis of stress response and provide valuable information regarding adaptation to the increased demands of challenging environments.
[Mh] Termos MeSH primário: Acetilcolinesterase/metabolismo
Adaptação Fisiológica/efeitos dos fármacos
Monitoramento Ambiental/métodos
Proteínas de Choque Térmico HSP70/metabolismo
Mytilidae/efeitos dos fármacos
Estresse Fisiológico/efeitos dos fármacos
[Mh] Termos MeSH secundário: Acetilcolinesterase/análise
Animais
Biomarcadores/análise
Ecossistema
Poluição Ambiental
Estuários
Proteínas de Choque Térmico HSP70/análise
Mytilidae/metabolismo
New York
Rios/química
Urbanização
Poluentes Químicos da Água/toxicidade
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biomarkers); 0 (HSP70 Heat-Shock Proteins); 0 (Water Pollutants, Chemical); EC 3.1.1.7 (Acetylcholinesterase)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170922
[Lr] Data última revisão:
170922
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170417
[St] Status:MEDLINE


  3 / 177 MEDLINE  
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[PMID]:28288367
[Au] Autor:Matusovsky OS; Dobrzhanskaya AV; Pankova VV; Kiselev KV; Girich UV; Shelud'ko NS
[Ad] Endereço:A.V. Zhirmunsky Institute of Marine Biology, National Scientific Center of Marine Biology, Far East Branch of the Russian Academy of Sciences, Vladivostok, Russia; School of Biomedicine, Far Eastern Federal University, Vladivostok, Russia. Electronic address: osmatusovsky@gmail.com.
[Ti] Título:Crenomytilus grayanus 40kDa calponin-like protein: cDNA cloning, sequence analysis, tissue expression, and post-translational modifications.
[So] Source:Comp Biochem Physiol Part D Genomics Proteomics;22:98-108, 2017 Jun.
[Is] ISSN:1878-0407
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Calponin-like protein (CaP-40), a third major protein after actin and tropomyosin, has recently been identified by us in the Ca -regulated thin filaments of mussel Crenomytilus grayanus. It contains calponin homology domain, five calponin family repeats and possesses similar biochemical properties as vertebrate smooth muscle calponin. In this paper, we report a full-length cDNA sequence of CaP-40, study its expression pattern on mRNA and protein levels, evaluate CaP-40 post-translational modifications and perform protein-protein interaction analysis. The full-length sequence of CaP-40 consists of 398 amino acids and has high similarity to calponins among molluscan species. CaP-40 gene is widely expressed in mussel tissues, with the highest expression in adductor and mantle. Comparison of these data with protein content established by mass-spectrometry analysis revealed that the high mRNA content is mirrored by high protein levels for adductor smooth muscles. To provide unbiased insight into the function of CaP-40 and effect of its over-expression in adductor smooth muscle, we built protein-protein interaction network of identified Crenomytilus grayanus proteome. In addition, we showed that CaP-40 is subjected to post-translational N- and C-terminal acetylation at N127, G229 and G349 sites which potentially regulates its function in vivo.
[Mh] Termos MeSH primário: Proteínas de Ligação ao Cálcio/genética
Proteínas de Ligação ao Cálcio/metabolismo
Proteínas dos Microfilamentos/genética
Proteínas dos Microfilamentos/metabolismo
Músculo Liso/metabolismo
Mytilidae/metabolismo
Processamento de Proteína Pós-Traducional
[Mh] Termos MeSH secundário: Sequência de Aminoácidos
Animais
Sequência de Bases
Cromatografia Líquida
Clonagem Molecular
DNA Complementar
Músculo Liso/citologia
Mytilidae/genética
Mytilidae/crescimento & desenvolvimento
Filogenia
Conformação Proteica
Mapas de Interação de Proteínas
Análise de Sequência
Espectrometria de Massas em Tandem
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Calcium-Binding Proteins); 0 (DNA, Complementary); 0 (Microfilament Proteins); 0 (calponin)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170814
[Lr] Data última revisão:
170814
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170314
[St] Status:MEDLINE


  4 / 177 MEDLINE  
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[PMID]:28259420
[Au] Autor:Astudillo JC; Bonebrake TC; Leung KMY
[Ad] Endereço:The Swire Institute of Marine Science, Faculty of Science, The University of Hong Kong, Cape d'Aguilar Road, Shek O, Hong Kong, China; School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China. Electronic address: jcarlos@connect.hku.hk.
[Ti] Título:The recently introduced bivalve Xenostrobus securis has higher thermal and salinity tolerance than the native Brachidontes variabilis and established Mytilopsis sallei.
[So] Source:Mar Pollut Bull;118(1-2):229-236, 2017 May 15.
[Is] ISSN:1879-3363
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The recently introduced bivalve Xenostrobus securis and the previously introduced Mytilopsis sallei (~30years) are dominant over the native Brachidontes variabilis in estuarine fouling communities in Hong Kong. This study tested whether these introduced species have higher thermal and salinity tolerance than the native species under local subtropical seawater conditions. Survival, attachment, clearance rate and byssal thread production of these three species were examined through 96-h acute temperature and salinity tests. The results indicated that X. securis responded normally over a wide range of temperature and salinity conditions. Though M. sallei exhibited a wide salinity tolerance, its sub-lethal responses decreased in cold-seawater conditions. Brachidontes variabilis had the narrowest tolerance to temperature and salinity. These findings may explain the dominance of the non-native bivalves over B. variabilis. The high tolerance of X. securis enables them to become highly invasive in subtropical regions across Southeast Asia, impacting natural communities and shellfish farming.
[Mh] Termos MeSH primário: Espécies Introduzidas
Mytilidae/fisiologia
Salinidade
Tolerância a Sal
Temperatura Ambiente
[Mh] Termos MeSH secundário: Animais
Hong Kong
Água do Mar
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170525
[Lr] Data última revisão:
170525
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170306
[St] Status:MEDLINE


  5 / 177 MEDLINE  
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[PMID]:28236816
[Au] Autor:El Nemr A; El-Said GF
[Ti] Título:Assessment and Ecological Risk of Heavy Metals in Sediment and Molluscs from the Mediterranean Coast.
[So] Source:Water Environ Res;89(3):195-210, 2017 Mar 01.
[Is] ISSN:1061-4303
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Heavy metal contamination in both sediments and molluscs from the Egyptian Mediterranean coast was investigated. Seawater, sediments, and mollusc samples were collected from representative locations along the coastal area. Different representations of the data set, including, statistical methods (correlation matrix and cluster analyses), various sediment quality assessment methods, and bioaccumulation factor calculation, were combined to investigate the trends of heavy metals, identify pollution sources, and assess sediment quality from a toxicological point of view. The measurements of dissolved oxygen (DO) revealed to relatively well oxygenate surface water in all locations. There is a distinct change in the contents of heavy metals (Fe, Al, Zn, Cu, Ni, Cr, Pb, Cd, and Hg) among the sampling sediments. The statistical interpretations showed that the bio-availability of the studied heavy metals is controlled by different factors, including the geochemistry of sediments, the hydrology of the system, the uptake of metals from sediments, as well as human anthropogenic activities. Although, there are still certain points of the Egyptian Mediterranean coast with a relatively high concentration of toxic metals, the toxicological approach suggests that the risk for living organisms is not high, but, in the long run, toxicological implications can appear. These results can provide useful information for the local managers and decision makers.
[Mh] Termos MeSH primário: Monitoramento Ambiental/métodos
Sedimentos Geológicos/análise
Metais Pesados/análise
Mytilidae/química
[Mh] Termos MeSH secundário: Animais
Egito
Região do Mediterrâneo
Medição de Risco
Água do Mar/análise
Caramujos/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Metals, Heavy)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171103
[Lr] Data última revisão:
171103
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170227
[St] Status:MEDLINE
[do] DOI:10.2175/106143016X14798353399458


  6 / 177 MEDLINE  
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[PMID]:28222862
[Au] Autor:Kent FEA; Mair JM; Newton J; Lindenbaum C; Porter JS; Sanderson WG
[Ad] Endereço:Centre for Marine Biodiversity & Biotechnology, EGIS, Heriot-Watt University, Edinburgh EH14 4AS, UK. Electronic address: kent.flora@gmail.com.
[Ti] Título:Commercially important species associated with horse mussel (Modiolus modiolus) biogenic reefs: A priority habitat for nature conservation and fisheries benefits.
[So] Source:Mar Pollut Bull;118(1-2):71-78, 2017 May 15.
[Is] ISSN:1879-3363
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Horse mussel reefs (Modiolus modiolus) are biodiversity hotspots afforded protection by Marine Protected Areas (MPAs) in the NE Atlantic. In this study, horse mussel reefs, cobble habitats and sandy habitats were assessed using underwater visual census and drop-down video techniques in three UK regions. Megafauna were enumerated, differences in community composition and individual species abundances were analysed. Samples of conspicuous megafauna were also collected from horse mussel reefs in Orkney for stable isotope analysis. Communities of conspicuous megafauna were different between horse mussel habitats and other habitats throughout their range. Three commercially important species: whelks (Buccinum undatum), queen scallops (Aequipecten opercularis) and spider crabs (Maja brachydactyla) were significantly more abundant (by as much as 20 times) on horse mussel reefs than elsewhere. Isotopic analysis provided insights into their trophic relationship with the horse mussel reef. Protection of M. modiolus habitat can achieve biodiversity conservation objectives whilst benefiting fisheries also.
[Mh] Termos MeSH primário: Biodiversidade
Ecossistema
Mytilidae
[Mh] Termos MeSH secundário: Animais
Braquiúros
Conservação dos Recursos Naturais/métodos
Pesqueiros
Reino Unido
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170525
[Lr] Data última revisão:
170525
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170223
[St] Status:MEDLINE


  7 / 177 MEDLINE  
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[PMID]:28111230
[Au] Autor:Huang B; Meng J; Yang M; Xu F; Li X; Li L; Zhang G
[Ad] Endereço:Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Fisheries and Aquaculture, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; National and Local Joint Engineering Laboratory of Ecol
[Ti] Título:Characterization of the IRF2 proteins isolated from the deep-sea mussel Bathymodiolus platifrons and the shallow-water mussel Modiolus modiolus.
[So] Source:Dev Comp Immunol;71:82-87, 2017 06.
[Is] ISSN:1879-0089
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Interferon regulatory factors (IRFs) are transcription factors that play important roles in immune defense, stress response, hematopoietic differentiation, and cell apoptosis. IRFs of invertebrate organisms and their functions remain largely unexplored. In the present study, for the first time new IRFs (BpIRF2 and MmIRF2) were identified in the deep-sea mussel Bathymodiolus platifrons and the shallow-water mussel Modiolus modiolus. The open reading frame of BpIRF2 and MmIRF2 encoded putative proteins of 354 and 348 amino acids, respectively. Comparison and phylogenetic analysis revealed that both IRF2 proteins were new identified invertebrate IRF molecular. As transcriptional factors, both BpIRF2 and MmIRF2 could activate the interferon-stimulated response element-containing promoter and BpIRF2 could interact with itself. Moreover, both BpIRF2 and MmIRF2 were localized to the cytoplasm and nucleus. Collectively, these results demonstrated that IRF2 proteins might be crucial in the innate immunity of deep-sea and shallow-water mussels.
[Mh] Termos MeSH primário: Núcleo Celular/metabolismo
Citoplasma/metabolismo
Fator Regulador 2 de Interferon/metabolismo
Mytilidae/imunologia
Ativação Transcricional
[Mh] Termos MeSH secundário: Animais
Clonagem Molecular
Estruturas Genéticas
Células HeLa
Seres Humanos
Imunidade Inata/genética
Fator Regulador 2 de Interferon/genética
Filogenia
Regiões Promotoras Genéticas/genética
Ligação Proteica
Análise de Sequência de DNA
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Interferon Regulatory Factor-2)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:171120
[Lr] Data última revisão:
171120
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170124
[St] Status:MEDLINE


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[PMID]:28086786
[Au] Autor:Breusing C; Vrijenhoek RC; Reusch TB
[Ad] Endereço:GEOMAR Helmholtz Centre for Ocean Research Kiel, Evolutionary Ecology of Marine Fishes, Düsternbrooker Weg 20, 24105, Kiel, Germany. cbreusing@mbari.org.
[Ti] Título:Widespread introgression in deep-sea hydrothermal vent mussels.
[So] Source:BMC Evol Biol;17(1):13, 2017 Jan 13.
[Is] ISSN:1471-2148
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: The analysis of hybrid zones is crucial for gaining a mechanistic understanding of the process of speciation and the maintenance of species boundaries. Hybrid zones have been studied intensively in terrestrial and shallow-water ecosystems, but very little is known about their occurrence in deep-sea environments. Here we used diagnostic, single nucleotide polymorphisms in combination with one mitochondrial gene to re-examine prior hypotheses about a contact zone involving deep-sea hydrothermal vent mussels, Bathymodiolus azoricus and B. puteoserpentis, living along the Mid-Atlantic Ridge. RESULTS: Admixture was found to be asymmetric with respect to the parental species, while introgression was more widespread geographically than previously recognized. Admixed individuals with a majority of alleles from one of the parental species were most frequent in habitats corresponding to that species. Mussels found at a geographically intermediate vent field constituted a genetically mixed population that showed no evidence for hybrid incompatibilities, a finding that does not support a previously inferred tension zone model. CONCLUSIONS: Our analyses indicate that B. azoricus and B. puteoserpentis hybridize introgressively across a large geographic area without evidence for general hybrid incompatibilities. While these findings shed new light onto the genetic structure of this hybrid zone, many aspects about its nature still remain obscure. Our study sets a baseline for further research that should primarily focus on the acquisition of additional mussel samples and environmental data, a detailed exploration of vent areas and hidden populations as well as genomic analyses in both mussel hosts and their bacterial symbionts.
[Mh] Termos MeSH primário: Bivalves/genética
Hibridização Genética
[Mh] Termos MeSH secundário: Animais
Ecossistema
Transferência Genética Horizontal
Genética Populacional
Fontes Hidrotermais
Mytilidae/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170808
[Lr] Data última revisão:
170808
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170115
[St] Status:MEDLINE
[do] DOI:10.1186/s12862-016-0862-2


  9 / 177 MEDLINE  
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[PMID]:28027966
[Au] Autor:Robicheau BM; Breton S; Stewart DT
[Ad] Endereço:Department of Biology, Acadia University, Wolfville, NS, Canada.
[Ti] Título:Sequence motifs associated with paternal transmission of mitochondrial DNA in the horse mussel, Modiolus modiolus (Bivalvia: Mytilidae).
[So] Source:Gene;605:32-42, 2017 Mar 20.
[Is] ISSN:1879-0038
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:In the majority of metazoans paternal mitochondria represent evolutionary dead-ends. In many bivalves, however, this paradigm does not hold true; both maternal and paternal mitochondria are inherited. Herein, we characterize maternal and paternal mitochondrial control regions of the horse mussel, Modiolus modiolus (Bivalvia: Mytilidae). The maternal control region is 808bp long, while the paternal control region is longer at 2.3kb. We hypothesize that the size difference is due to a combination of repeated duplications within the control region of the paternal mtDNA genome, as well as an evolutionarily ancient recombination event between two sex-associated mtDNA genomes that led to the insertion of a second control region sequence in the genome that is now transmitted via males. In a comparison to other mytilid male control regions, we identified two evolutionarily Conserved Motifs, CMA and CMB, associated with paternal transmission of mitochondrial DNA. CMA is characterized by a conserved purine/pyrimidine pattern, while CMB exhibits a specific 13bp nucleotide string within a stem and loop structure. The identification of motifs CMA and CMB in M. modiolus extends our understanding of Sperm Transmission Elements (STEs) that have recently been identified as being associated with the paternal transmission of mitochondria in marine bivalves.
[Mh] Termos MeSH primário: DNA Mitocondrial/genética
Genoma Mitocondrial
Padrões de Herança
Mytilidae/genética
Motivos de Nucleotídeos
[Mh] Termos MeSH secundário: Animais
Evolução Biológica
Feminino
Masculino
Mitocôndrias/genética
Mytilidae/classificação
Conformação de Ácido Nucleico
Filogenia
Alinhamento de Sequência
Análise de Sequência de DNA
Espermatozoides/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Mitochondrial)
[Em] Mês de entrada:1702
[Cu] Atualização por classe:170206
[Lr] Data última revisão:
170206
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161229
[St] Status:MEDLINE


  10 / 177 MEDLINE  
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[PMID]:27801908
[Au] Autor:Ponnudurai R; Kleiner M; Sayavedra L; Petersen JM; Moche M; Otto A; Becher D; Takeuchi T; Satoh N; Dubilier N; Schweder T; Markert S
[Ad] Endereço:Institute of Pharmacy, Ernst-Moritz-Arndt-University, Greifswald, Germany.
[Ti] Título:Metabolic and physiological interdependencies in the Bathymodiolus azoricus symbiosis.
[So] Source:ISME J;11(2):463-477, 2017 Feb.
[Is] ISSN:1751-7370
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:The hydrothermal vent mussel Bathymodiolus azoricus lives in an intimate symbiosis with two types of chemosynthetic Gammaproteobacteria in its gills: a sulfur oxidizer and a methane oxidizer. Despite numerous investigations over the last decades, the degree of interdependence between the three symbiotic partners, their individual metabolic contributions, as well as the mechanism of carbon transfer from the symbionts to the host are poorly understood. We used a combination of proteomics and genomics to investigate the physiology and metabolism of the individual symbiotic partners. Our study revealed that key metabolic functions are most likely accomplished jointly by B. azoricus and its symbionts: (1) CO is pre-concentrated by the host for carbon fixation by the sulfur-oxidizing symbiont, and (2) the host replenishes essential biosynthetic TCA cycle intermediates for the sulfur-oxidizing symbiont. In return (3), the sulfur oxidizer may compensate for the host's putative deficiency in amino acid and cofactor biosynthesis. We also identified numerous 'symbiosis-specific' host proteins by comparing symbiont-containing and symbiont-free host tissues and symbiont fractions. These proteins included a large complement of host digestive enzymes in the gill that are likely involved in symbiont digestion and carbon transfer from the symbionts to the host.
[Mh] Termos MeSH primário: Gammaproteobacteria/fisiologia
Mytilidae/microbiologia
Proteoma
Simbiose
[Mh] Termos MeSH secundário: Animais
Vias Biossintéticas
Brânquias/microbiologia
Fontes Hidrotermais
Metano/metabolismo
Mytilidae/genética
Oxirredução
Especificidade da Espécie
Enxofre/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Proteome); 70FD1KFU70 (Sulfur); OP0UW79H66 (Methane)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170801
[Lr] Data última revisão:
170801
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161102
[St] Status:MEDLINE
[do] DOI:10.1038/ismej.2016.124



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