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  1 / 1953 MEDLINE  
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[PMID]:29273953
[Au] Autor:Coutinho MCL; Teixeira VL; Santos CSG
[Ad] Endereço:Department of Marine Biology, Institute of Biology, Federal Fluminense University, Outeiro São João Batista, s/no, P.O. Box 100.644, Niterói, RJ, 24020-150, Brazil. marinacoutinho88@gmail.com.
[Ti] Título:A Review of "Polychaeta" Chemicals and their Possible Ecological Role.
[So] Source:J Chem Ecol;44(1):72-94, 2018 Jan.
[Is] ISSN:1573-1561
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Despite the many publications concerning the isolation of substances and the many reviews of marine natural products, some groups of organisms remain poorly studied, including "Polychaeta". In response, this review covers articles published through December 2016 that address marine natural products produced from polychaetes, with a focus on antipredatory strategies, competitors, fouling, and pathogens. A total of 121 compounds were isolated from 1934 to 2016, which includes halogenated aromatics, proteins, amino acids and Lumazine derivatives most notably-with a defensive function were found in the literature, most frequently in the families Sabellidae, Terebellidae, Glyceridae, and Nereididae. The period of highest discovery of natural products in defensive actions for the group was the 2000s. Polychaetes were addressed in 26 revisions of the total 51 articles analyzed and are less reported than other marine invertebrates such as sponges, cnidarians, mollusks, and tunicates. In sum, the present review provides a basis for future research on the marine chemical ecology of polychaetes.
[Mh] Termos MeSH primário: Organismos Aquáticos/química
Produtos Biológicos/química
[Mh] Termos MeSH secundário: Animais
Organismos Aquáticos/metabolismo
Produtos Biológicos/isolamento & purificação
Cnidários/química
Cnidários/metabolismo
Comportamento Consumatório/fisiologia
Equinodermos/química
Equinodermos/metabolismo
Fenômenos Ecológicos e Ambientais
Moluscos/química
Moluscos/metabolismo
Urocordados/química
Urocordados/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE; REVIEW
[Nm] Nome de substância:
0 (Biological Products)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180221
[Lr] Data última revisão:
180221
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171224
[St] Status:MEDLINE
[do] DOI:10.1007/s10886-017-0915-z


  2 / 1953 MEDLINE  
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[PMID]:28898598
[Au] Autor:Galaska MP; Sands CJ; Santos SR; Mahon AR; Halanych KM
[Ti] Título:Crossing the Divide: Admixture Across the Antarctic Polar Front Revealed by the Brittle Star Astrotoma agassizii.
[So] Source:Biol Bull;232(3):198-211, 2017 Jun.
[Is] ISSN:1939-8697
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The Antarctic Polar Front (APF) is one of the most well-defined and persistent oceanographic features on the planet and serves as a barrier to dispersal between the Southern Ocean and lower latitudes. High levels of endemism in the Southern Ocean have been attributed to this barrier, whereas the accompanying Antarctic Circumpolar Current (ACC) likely promotes west-to-east dispersal. Previous phylogeographic work on the brittle star Astrotoma agassizii Lyman, 1875 based on mitochondrial genes suggested isolation across the APF, even though populations in both South American waters and the Southern Ocean are morphologically indistinguishable. Here, we revisit this finding using a high-resolution 2b-RAD (restriction-site-associated DNA) single-nucleotide polymorphism (SNP)-based approach, in addition to enlarged mitochondrial DNA data sets (16S rDNA, COI, and COII), for comparison to previous work. In total, 955 biallelic SNP loci confirmed the existence of strongly divergent populations on either side of the Drake Passage. Interestingly, genetic admixture was detected between South America and the Southern Ocean in five individuals on both sides of the APF, revealing evidence of recent or ongoing genetic contact. We also identified two differentiated populations on the Patagonian Shelf with six admixed individuals from these two populations. These findings suggest that the APF is a strong but imperfect barrier. Fluctuations in location and strength of the APF and ACC due to climate shifts may have profound consequences for levels of admixture or endemism in this region of the world.
[Mh] Termos MeSH primário: Equinodermos/classificação
Equinodermos/genética
Filogenia
[Mh] Termos MeSH secundário: Animais
Regiões Antárticas
DNA Mitocondrial/genética
Variação Genética
Filogeografia
Polimorfismo de Nucleotídeo Único
América do Sul
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Mitochondrial)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171027
[Lr] Data última revisão:
171027
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170913
[St] Status:MEDLINE
[do] DOI:10.1086/693460


  3 / 1953 MEDLINE  
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[PMID]:28753616
[Au] Autor:Kalacheva NV; Eliseikina MG; Frolova LT; Dolmatov IY
[Ad] Endereço:A.V. Zhirmunsky Institute of Marine Biology, National Scientific Center of Marine Biology, Far Eastern Branch, Russian Academy of Sciences, Vladivostok, Russia.
[Ti] Título:Regeneration of the digestive system in the crinoid Himerometra robustipinna occurs by transdifferentiation of neurosecretory-like cells.
[So] Source:PLoS One;12(7):e0182001, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The structure and regeneration of the digestive system in the crinoid Himerometra robustipinna (Carpenter, 1881) were studied. The gut comprises a spiral tube forming radial lateral processes, which gives it a five-lobed shape. The digestive tube consists of three segments: esophagus, intestine, and rectum. The epithelia of these segments have different cell compositions. Regeneration of the gut after autotomy of the visceral mass progresses very rapidly. Within 6 h after autotomy, an aggregation consisting of amoebocytes, coelomic epithelial cells and juxtaligamental cells (neurosecretory neurons) forms on the inner surface of the skeletal calyx. At 12 h post-autotomy, transdifferentiation of the juxtaligamental cells starts. At 24 h post-autotomy these cells undergo a mesenchymal-epithelial-like transition, resulting in the formation of the luminal epithelium of the gut. Specialization of the intestinal epithelial cells begins on day 2 post-autotomy. At this stage animals acquire the mouth and anal opening. On day 4 post-autotomy the height of both the enterocytes and the visceral mass gradually increases. Proliferation does not play any noticeable role in gut regeneration. The immersion of animals in a 10-7 M solution of colchicine neither stopped formation of the lost structures nor caused accumulation of mitoses in tissues. Weakly EdU-labeled nuclei were observed in the gut only on day 2 post-autotomy and were not detected at later regeneration stages. Single mitotically dividing cells were recorded during the same period. It is concluded that juxtaligamental cells play a major role in gut regeneration in H. robustipinna. The main mechanisms of morphogenesis are cell migration and transdifferentiation.
[Mh] Termos MeSH primário: Transdiferenciação Celular
Equinodermos/citologia
Equinodermos/fisiologia
Trato Gastrointestinal/fisiologia
Sistemas Neurossecretores/citologia
Regeneração/fisiologia
[Mh] Termos MeSH secundário: Animais
Transdiferenciação Celular/efeitos dos fármacos
Colchicina/farmacologia
DNA/biossíntese
Equinodermos/efeitos dos fármacos
Epitélio/efeitos dos fármacos
Epitélio/ultraestrutura
Trato Gastrointestinal/efeitos dos fármacos
Trato Gastrointestinal/ultraestrutura
Imagem Tridimensional
Mitose/efeitos dos fármacos
Sistemas Neurossecretores/efeitos dos fármacos
Regeneração/efeitos dos fármacos
Soluções
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Solutions); 9007-49-2 (DNA); SML2Y3J35T (Colchicine)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170929
[Lr] Data última revisão:
170929
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170729
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0182001


  4 / 1953 MEDLINE  
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[PMID]:28624116
[Au] Autor:Iglikowska A; Najorka J; Voronkov A; Chelchowski M; Kuklinski P
[Ad] Endereço:Marine Ecology Department, Institute of Oceanology Polish Academy of Sciences, Powstanców Warszawy 55, 81-712, Sopot, Poland. Electronic address: iglikowska@iopan.gda.pl.
[Ti] Título:Variability in magnesium content in Arctic echinoderm skeletons.
[So] Source:Mar Environ Res;129:207-218, 2017 Aug.
[Is] ISSN:1879-0291
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:In this study, 235 measurements of magnesium concentration in echinoderm's skeletons were compiled, including 30 species and 216 specimens collected from northern and western Barents Sea. We aimed to reveal the scale of Mg variation in the skeletons of Arctic echinoderms. Furthermore, we attempted to examine whether the Mg concentration in echinoderm skeletons is determined primarily by biological factors or is a passive result of environmental influences. We found that the Mg concentration in echinoderm skeletons was characteristic for particular echinoderm classes or was even species-specific. The highest Mg contents were observed in asteroids, followed by ophiuroids, crinoids, and holothuroids, with the lowest values in echinoids. These results strongly imply that biological factors play an important role in controlling the incorporation of Mg into the skeletons of the studied individuals.
[Mh] Termos MeSH primário: Equinodermos/metabolismo
Magnésio/metabolismo
[Mh] Termos MeSH secundário: Animais
Regiões Árticas
Biodiversidade
Filogenia
Densidade Demográfica
Esqueleto/química
Especificidade da Espécie
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
I38ZP9992A (Magnesium)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170817
[Lr] Data última revisão:
170817
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170619
[St] Status:MEDLINE


  5 / 1953 MEDLINE  
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[PMID]:28610370
[Au] Autor:Summers MM; Messing CG; Rouse GW
[Ad] Endereço:Scripps Institution of Oceanography, UCSD, 9500 Gilman Drive, La Jolla, CA 92093, USA University of Calgary, 2500 University Dr NW, Calgary, AB T2N 1N4, Canada. mindi.summers@ucalgary.ca.
[Ti] Título:The genera and species of Comatulidae (Comatulida: Crinoidea): taxonomic revisions and a molecular and morphological guide.
[So] Source:Zootaxa;4268(2):151-190, 2017 05 16.
[Is] ISSN:1175-5334
[Cp] País de publicação:New Zealand
[La] Idioma:eng
[Ab] Resumo:We provide a guide for identification of Comatulidae, a family of crinoid echinoderms, incorporating morphological and molecular evidence. A non-dichotomous key for all genera is included, as well as photographs of species most likely to be encountered in the tropical western Pacific Ocean. Based on sequencing of cytochrome oxidase subunit I (COI), and other genes when necessary, we identified four cases where taxonomic revision was needed. We synonymized Comaster nobilis under Comaster schlegelii, and Clarkcomanthus exilis under Clarkcomanthus comanthipinnus, and re-described Clarkcomanthus albinotus. We also showed the variation of COI sequences within and among species, which varies from lineage to lineage. In some cases, specimens with obvious morphological disparity possessed very little intraspecific molecular diversity (<1%). In others, specimens with nearly identical external appearances exhibited quite divergent COI sequences (up to 6%). These results, combined with the non-dichotomous key herein, offer guidelines for identification and discussion of existing and new species of Comatulidae.
[Mh] Termos MeSH primário: Equinodermos
[Mh] Termos MeSH secundário: Animais
Complexo IV da Cadeia de Transporte de Elétrons
Oceano Pacífico
Filogenia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
EC 1.9.3.1 (Electron Transport Complex IV)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170809
[Lr] Data última revisão:
170809
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170615
[St] Status:MEDLINE
[do] DOI:10.11646/zootaxa.4268.2.1


  6 / 1953 MEDLINE  
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[PMID]:28610308
[Au] Autor:Mah CL
[Ad] Endereço:Department of Invertebrate Zoology, National Museum of Natural History, PO Box 37012, MRC 163, Smithsonian Institution, Washington D.C. 20013, United States of America.. brisinga@gmail.com.
[Ti] Título:Overview of the Ferdina-like Goniasteridae (Echinodermata: Asteroidea) including a new subfamily, three new genera and fourteen new species.
[So] Source:Zootaxa;4271(1):1-72, 2017 05 25.
[Is] ISSN:1175-5334
[Cp] País de publicação:New Zealand
[La] Idioma:eng
[Ab] Resumo:Recent assignment of some goniasterid-like Ophidiasteridae into the Goniasteridae has led to further re-evaluation of other ophidiasterids as possible goniasterids. This led to the discovery of new genera and species supported by a distinctive set of characteristics which support a new subfamily, the Ferdininae, a group originally outlined by Marsh and Price (1991) within the Goniasteridae. The historical Ophidiasteridae is paraphyletic and includes several nominal ophidiasterid genera (e.g., Fromia, Neoferdina, etc.). Newly described material has led to the inclusion of six genera,within this group, of which three, Bathyferdina n. gen., Eosaster n. gen., and Kanakaster n. gen., are newly described. Fourteen new species in five genera are described. This includes Bathyferdina aireyae n. gen., n. sp., Eosaster nadiae n. gen., n. sp., Ferdina mena n. sp., Kanakaster balutensis n. gen., n. sp., Kanakaster convexus n. gen., n. sp., Kanakaster discus n. gen., n. sp., Kanakaster larae n. gen., n. sp., Kanakaster plinthinos n. gen., n. sp., Kanakaster solidus n. gen., n. sp., Neoferdina annae n. sp., Neoferdina antigorum, n. sp., Neoferdina momo, n. sp., Neoferdina oni, n. sp., and Paraferdina plakos, n. sp. Identification keys, synopses, and description of these taxa are included.
[Mh] Termos MeSH primário: Equinodermos
[Mh] Termos MeSH secundário: Animais
Gastrópodes
Estrelas-do-Mar
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170809
[Lr] Data última revisão:
170809
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170615
[St] Status:MEDLINE
[do] DOI:10.11646/zootaxa.4271.1.1


  7 / 1953 MEDLINE  
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[PMID]:28610056
[Au] Autor:Canário R; Rocha CEFD; Neves E; Johnsson R
[Ad] Endereço:Universidade Federal da Bahia, Inst. Biologia, Dpt. Zoologia, LABIMAR - Crustacea, Cnidaria & Fauna Associada, Av. Adhemar de Barros, s/n, Campus Ondina, Salvador, Bahia, Brazil - CEP: 40170-290. Universidade de São Paulo, Inst. de Biociências, Dpt. Zoologia, R. do Matão, 14 - Butantã, São Paulo, Brazil - CEP: 05508-090. rcanariosoares@gmail.com.
[Ti] Título:A new asterocherid genus (Copepoda: Siphonostomatoida) associated with Callyspongia Duchassaing & Michelotti and reassessment of six species of Asterocheres Boeck.
[So] Source:Zootaxa;4247(2):101-113, 2017 Mar 27.
[Is] ISSN:1175-5334
[Cp] País de publicação:New Zealand
[La] Idioma:eng
[Ab] Resumo:The family Asterocheridae Giesbrecht has several genera associated with sponges including Asterocheres Boeck, 1859. The type genus is commonly found in sponges but it is also recorded in echinoderms, bryozoans, and corals. A revision of the diagnosis of Asterocheres conducted in 2010 was the beginning of a reorganization process, culminating in the present status of 63 valid species. This study describes a new species and genus of the Asterocheridae. Neoasterocheres gen. nov. shares many characteristics with Asterocheres sensu stricto, except for the antennule segmentation which shows ancestral segments IX-XII fused to segment XIII. The new species of Neoasterocheres gen. nov. was found in association with the sponge Callyspongia sp. sampled at the Yatch Club Bay, located in Todos-os-Santos Bay, Salvador city, Bahia State, Brazil. A revision of the Asterocheres sensu stricto indicates that A. enewetakensis Humes, 1997, A. dysideae Humes, 1996b, A. humesi Varela, 2012, A. rotundus Malt, 1991, A. scutatus Stock, 1966, and A. serrulatus (Humes, 1996a) share this fusion and therefore should be transferred to the new genus. A redescription of Neoasterocheres serrulatus n. comb. is also provided, based on the examination of type specimens.
[Mh] Termos MeSH primário: Copépodes
[Mh] Termos MeSH secundário: Animais
Antozoários
Brasil
Callyspongia
Equinodermos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170810
[Lr] Data última revisão:
170810
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170615
[St] Status:MEDLINE
[do] DOI:10.11646/zootaxa.4247.2.1


  8 / 1953 MEDLINE  
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[PMID]:28583083
[Au] Autor:Flores RL; Livingston BT
[Ad] Endereço:Department of Biological Sciences, California State University, 1250 Bellflower Blvd, Long Beach, CA, 90840, USA.
[Ti] Título:The skeletal proteome of the sea star Patiria miniata and evolution of biomineralization in echinoderms.
[So] Source:BMC Evol Biol;17(1):125, 2017 Jun 05.
[Is] ISSN:1471-2148
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Proteomic studies of skeletal proteins have revealed large, complex mixtures of proteins occluded within the mineral. Many skeletal proteomes contain rapidly evolving proteins with repetitive domains, further complicating our understanding. In echinoderms, proteomic analysis of the skeletal proteomes of mineralized tissues of the sea urchin Strongylocentrotus purpuratus prominently featured spicule matrix proteins with repetitive sequences linked to a C-type lectin domain. A comparative study of the brittle star Ophiocoma wendtii skeletal proteome revealed an order of magnitude fewer proteins containing C-type lectin domains. A number of other proteins conserved in the skeletons of the two groups were identified. Here we report the complete skeletal proteome of the sea star Patiria miniata and compare it to that of the other echinoderm groups. RESULTS: We have identified eighty-five proteins in the P. miniata skeletal proteome. Forty-two percent of the proteins were determined to be homologous to proteins found in the S. purpuratus skeletal proteomes. An additional 34 % were from similar functional classes as proteins in the urchin proteomes. Thirteen percent of the P. miniata proteins had homologues in the O. wendtii skeletal proteome with an additional 29% showing similarity to brittle star skeletal proteins. The P. miniata skeletal proteome did not contain any proteins with C-lectin domains or with acidic repetitive regions similar to the sea urchin or brittle star spicule matrix proteins. MSP130 proteins were also not found. We did identify a number of proteins homologous between the three groups. Some of the highly conserved proteins found in echinoderm skeletons have also been identified in vertebrate skeletons. CONCLUSIONS: The presence of proteins conserved in the skeleton in three different echinoderm groups indicates these proteins are important in skeleton formation. That a number of these proteins are involved in skeleton formation in vertebrates suggests a common origin for some of the fundamental processes co-opted for skeleton formation in deuterostomes. The proteins we identify suggest transport of proteins and calcium via endosomes was co-opted to this function in a convergent fashion. Our data also indicate that modifications to the process of skeleton formation can occur through independent co-option of proteins following species divergence as well as through domain shuffling.
[Mh] Termos MeSH primário: Proteoma/análise
Estrelas-do-Mar/química
Estrelas-do-Mar/genética
[Mh] Termos MeSH secundário: Animais
Evolução Biológica
Compostos de Cálcio/química
Equinodermos/química
Equinodermos/classificação
Evolução Molecular
Lectinas Tipo C/análise
Filogenia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Calcium Compounds); 0 (Lectins, C-Type); 0 (Proteome)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171013
[Lr] Data última revisão:
171013
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170607
[St] Status:MEDLINE
[do] DOI:10.1186/s12862-017-0978-z


  9 / 1953 MEDLINE  
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[PMID]:28410750
[Au] Autor:Mohd Zanuri NB; Bentley MG; Caldwell GS
[Ad] Endereço:School of Marine Science and Technology, Newcastle University, Ridley Building, Claremont Road, Newcastle upon Tyne, NE1 7RU, UK.
[Ti] Título:Assessing the impact of diclofenac, ibuprofen and sildenafil citrate (Viagra ) on the fertilisation biology of broadcast spawning marine invertebrates.
[So] Source:Mar Environ Res;127:126-136, 2017 Jun.
[Is] ISSN:1879-0291
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Exposure to synthetic chemicals is a key environmental challenge faced by aquatic organisms. The time and dose effects of the pharmaceuticals diclofenac, ibuprofen, and sildenafil citrate on sperm motility and successful fertilisation are studied using the echinoderms, Asterias rubens and Psammechinus miliaris, and the polychaete worm Arenicola marina, all important components of the marine benthos. Motility was reduced for all species when exposed to diclofenac concentrations ≥0.1 µg/L. Exposure to ≥1.0 µg/L of ibuprofen affected only P. miliaris gametes and fertilisation success of A. marina. A. rubens and P. miliaris sperm increased in both percentage motility and swimming velocity when exposed to sildenafil citrate at concentrations ≥18 and ≥ 50 ng/L, respectively. Pre-incubation of sperm with sildenafil citrate significantly increased fertilisation success in A. rubens and P. miliaris but not in A. marina. Pre-incubated A. rubens oocytes fertilised successfully in ibuprofen. According to EU Directive 93/67/EEC, diclofenac is classified as a very toxic substance to gametes of A. rubens, P. miliaris, and A. marina (EC = 100-1000 µg/L) while ibuprofen is classified as very toxic to gametes of P. miliaris but non-toxic to gametes of A. marina (EC > 10,000 µg/L). The present study indicates that diclofenac exposure may have negative impacts on invertebrate reproductive success, whereas ibuprofen potentially may compromise P. miliaris reproduction. This study provides a valuable insight into the mechanisms that allow marine invertebrates to survive and reproduce in contaminated and changing habitats.
[Mh] Termos MeSH primário: Organismos Aquáticos/fisiologia
Diclofenaco/toxicidade
Ibuprofeno/toxicidade
Invertebrados/fisiologia
Citrato de Sildenafila/toxicidade
Poluentes Químicos da Água/toxicidade
[Mh] Termos MeSH secundário: Animais
Equinodermos/fisiologia
Monitoramento Ambiental
Poliquetos/fisiologia
Reprodução/efeitos dos fármacos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Water Pollutants, Chemical); 144O8QL0L1 (Diclofenac); BW9B0ZE037 (Sildenafil Citrate); WK2XYI10QM (Ibuprofen)
[Em] Mês de entrada:1706
[Cu] Atualização por classe:170623
[Lr] Data última revisão:
170623
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170416
[St] Status:MEDLINE


  10 / 1953 MEDLINE  
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[PMID]:28381628
[Au] Autor:Delroisse J; Ullrich-Lüter E; Blaue S; Ortega-Martinez O; Eeckhaut I; Flammang P; Mallefet J
[Ad] Endereço:Research Institute for Biosciences, Biology of Marine Organisms and Biomimetics, University of Mons - UMONS, 23 Place du Parc, 7000 Mons, Belgium jerome.delroisse@umons.ac.be.
[Ti] Título:A puzzling homology: a brittle star using a putative cnidarian-type luciferase for bioluminescence.
[So] Source:Open Biol;7(4), 2017 Apr.
[Is] ISSN:2046-2441
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Bioluminescence relies on the oxidation of a luciferin substrate catalysed by a luciferase enzyme. Luciferins and luciferases are generic terms used to describe a large variety of substrates and enzymes. Whereas luciferins can be shared by phylogenetically distant organisms which feed on organisms producing them, luciferases have been thought to be lineage-specific enzymes. Numerous light emission systems would then have co-emerged independently along the tree of life resulting in a plethora of non-homologous luciferases. Here, we identify for the first time a candidate luciferase of a luminous echinoderm, the ophiuroid Phylogenomic analyses identified the brittle star predicted luciferase as homologous to the luciferase of the sea pansy (Cnidaria), contradicting with the traditional viewpoint according to which luciferases would generally be of convergent origins. The similarity between the and luciferases allowed us to detect the latter using anti- luciferase antibodies. Luciferase expression was specifically localized in the spines which were demonstrated to be the bioluminescent organs However, enzymes homologous to the luciferase but unable to trigger light emission were also identified in non-luminous echinoderms and metazoans. Our findings strongly indicate that those enzymes, belonging to the haloalkane dehalogenase family, might then have been convergently co-opted into luciferases in cnidarians and echinoderms. In these two benthic suspension-feeding species, similar ecological pressures would constitute strong selective forces for the functional shift of these enzymes and the emergence of bioluminescence.
[Mh] Termos MeSH primário: Cnidários/enzimologia
Equinodermos/enzimologia
Luciferases/metabolismo
Luminescência
[Mh] Termos MeSH secundário: Sequência de Aminoácidos
Animais
Cnidários/genética
Equinodermos/genética
Ativação Enzimática
Expressão Gênica
Luciferases/química
Luciferases/genética
Luciferases de Renilla/química
Luciferases de Renilla/genética
Luciferases de Renilla/metabolismo
Medições Luminescentes/métodos
Filogenia
Transporte Proteico
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
EC 1.13.12.- (Luciferases); EC 1.13.12.5 (Luciferases, Renilla)
[Em] Mês de entrada:1705
[Cu] Atualização por classe:170509
[Lr] Data última revisão:
170509
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170407
[St] Status:MEDLINE



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