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[PMID]:28456460
[Au] Autor:Sasaki A; Mizuno AN
[Ad] Endereço:Department of Evolutionary Studies of Biosystems, SOKENDAI (The Graduate University for Advanced Studies), Hayama, Kanagawa 240-0193, Japan; Evolution and Ecology Program, International Institute for Applied Systems Analysis, A-2361 Laxenburg, Austria. Electronic address: sasaki_akira@soken.ac.jp.
[Ti] Título:Partitioning light spectra: Adaptive stratification of phytobenthic communities in Antarctic lakes.
[So] Source:J Theor Biol;424:1-10, 2017 Jul 07.
[Is] ISSN:1095-8541
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Competition for light has an important influence for phototrophic community structures, especially, along the perpendicular axis. Here we develop a mathematical model for perpendicular community buildup of phototrophic species that differ in light absorption spectra and compete for incident light. Details of photon capture efficiencies and the roles of photoinhibition were taken into consideration to define species' fitness. Our theory showed that, if there is strong light irradiation due, for example, to the high transparency of the water in freshwater lakes in Antarctica, protective absorption of light should occur near the surface and photosynthetic absorption should gradually increase with depth. These results were then validated in comparison with observed vertical distributions of pigments in phytobenthic-mat communities from Antarctic lakes.
[Mh] Termos MeSH primário: Lagos
Luz
Modelos Biológicos
Fotossíntese/fisiologia
Fitoplâncton/fisiologia
[Mh] Termos MeSH secundário: Regiões Antárticas
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170501
[St] Status:MEDLINE


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[PMID]:29458488
[Au] Autor:Choi JY; Kim JH; Lee PC
[Ad] Endereço:Department of Molecular Science and Technology and Department of Applied Chemistry and Biological Engineering, Ajou University, Woncheon-dong, Yeongtong-gu, Suwon 16499, Republic of Korea.
[Ti] Título:Flavobacterium kingsejongi sp. nov., a carotenoid-producing species isolated from Antarctic penguin faeces.
[So] Source:Int J Syst Evol Microbiol;68(3):911-916, 2018 Mar.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Taxonomic studies were carried out on a carotenoid-producing strain, designated WV39 , isolated from the faeces of Antarctic penguins. Cells of strain WV39 were Gram-stain-negative, strictly aerobic, yellow and rod-shaped. 16S rRNA gene sequence analysis revealed that strain WV39 was closely related to Flavobacterium qiangtangense JCM 19739 (96.3 % similarity), Flavobacterium noncentrifugens NBRC 108844 (95.5 %) and Flavobacterium aquatile LMG 4008 (94.9 %). The predominant cellular fatty acids were iso-C15 : 0, iso-C15 : 0 3-OH and summed feature 3 (comprising iso-C15 : 0 2-OH and/or C16 : 1ω7c). Menaquinone-6 was the sole quinone identified, and the major pigment was zeaxanthin. The major polar lipid was phosphatidylethanolamine. DNA-DNA relatedness of strain WV39 with respect to its closest phylogenetic neighbours was 41.8 % for F. qiangtangense JCM 19739 , 25.5 % for F. aquatile LMG 4008 and 25.2 % for F. noncentrifugens NBRC 108844 . The DNA G+C content of strain WV39 was 39.8 mol%. Based on the phenotypic, chemotaxonomic and phylogenetic data, strain WV39 is concluded to represent a novel species of the genus Flavobacterium, for which the name Flavobacteriumkingsejongi sp. nov. is proposed. The type strain is WV39 (=KCTC 42908 =CECT 9085 ).
[Mh] Termos MeSH primário: Flavobacterium/classificação
Filogenia
Spheniscidae/microbiologia
Zeaxantinas/química
[Mh] Termos MeSH secundário: Animais
Regiões Antárticas
Técnicas de Tipagem Bacteriana
Composição de Bases
DNA Bacteriano/genética
Ácidos Graxos/química
Fezes/microbiologia
Flavobacterium/genética
Flavobacterium/isolamento & purificação
Hibridização de Ácido Nucleico
Fosfatidiletanolaminas/química
Pigmentação
RNA Ribossômico 16S/genética
Análise de Sequência de DNA
Vitamina K 2/análogos & derivados
Vitamina K 2/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (Phosphatidylethanolamines); 0 (RNA, Ribosomal, 16S); 0 (Zeaxanthins); 11032-49-8 (Vitamin K 2); 39382-08-6 (phosphatidylethanolamine); 71ANL51TLA (menaquinone 6)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180221
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002610


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[PMID]:29458470
[Au] Autor:Ren Q; Yu M; Li Y; Zhang Y; Shi X; Wu Y; Su Y; Wang Y; Wang X; Zhang XH
[Ad] Endereço:1​College of Marine Life Sciences, Ocean University of China, Qingdao 266003, PR China.
[Ti] Título:Flavobacterium ovatum sp. nov., a marine bacterium isolated from an Antarctic intertidal sandy beach.
[So] Source:Int J Syst Evol Microbiol;68(3):795-800, 2018 Mar.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A rod-shaped, Gram-staining-negative, strictly aerobic, non-motile bacterium with no flexirubin-type pigment, designated as W201E , was isolated from an intertidal sandy beach in Antarctica. The organism formed faintly yellow, round colonies on marine agar 2216E. The strain required sea salts for growth and grew optimally in the presence of 2 % (w/v) NaCl at pH 7.0, 20 °C. Phylogenetic analysis based on 16S rRNA gene sequence indicated that strain W201E belonged to the genus Flavobacterium and showed the highest sequence similarity to Flavobacterium algicola NBRC 102673 (96.5 %). The major respiratory quinone was menaquinone 6, and the predominant fatty acids were iso-C15 : 1 G, iso-C15 : 0, iso-C15 : 0 3-OH and summed feature 3 (which comprises C16 : 1ω7c and/or C16 : 1ω6c). The polar lipids of strain W201E comprised one phosphatidylethanolamine, two unidentified aminolipids and three unidentified polar lipids. The DNA G+C content of strain W201E was 34.1 mol%. On the basis of the polyphasic analyses, this isolate was considered to represent a novel species in the genus Flavobacterium, for which the name Flavobacterium ovatum sp. nov. is proposed. The type strain is W201E (=KCTC 52693 =MCCC 1K03251 =CGMCC 1.16053 ).
[Mh] Termos MeSH primário: Flavobacterium/classificação
Filogenia
Água do Mar/microbiologia
[Mh] Termos MeSH secundário: Regiões Antárticas
Técnicas de Tipagem Bacteriana
Composição de Bases
DNA Bacteriano/genética
Ácidos Graxos/química
Flavobacterium/genética
Flavobacterium/isolamento & purificação
Fosfatidiletanolaminas/química
Pigmentação
RNA Ribossômico 16S/genética
Análise de Sequência de DNA
Dióxido de Silício
Vitamina K 2/análogos & derivados
Vitamina K 2/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (Phosphatidylethanolamines); 0 (RNA, Ribosomal, 16S); 11032-49-8 (Vitamin K 2); 39382-08-6 (phosphatidylethanolamine); 71ANL51TLA (menaquinone 6); 7631-86-9 (Silicon Dioxide)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180221
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002586


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[PMID]:29362437
[Au] Autor:Otero XL; De La Peña-Lastra S; Pérez-Alberti A; Ferreira TO; Huerta-Diaz MA
[Ad] Endereço:Departamento de Edafoloxía e Química Agrícola, Campus Vida, Facultade de Bioloxía, Universidade de Santiago de Compostela, 15782, Santiago de Compostela, Spain.
[Ti] Título:Seabird colonies as important global drivers in the nitrogen and phosphorus cycles.
[So] Source:Nat Commun;9(1):246, 2018 01 23.
[Is] ISSN:2041-1723
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Seabirds drastically transform the environmental conditions of the sites where they establish their breeding colonies via soil, sediment, and water eutrophication (hereafter termed ornitheutrophication). Here, we report worldwide amounts of total nitrogen (N) and total phosphorus (P) excreted by seabirds using an inventory of global seabird populations applied to a bioenergetics model. We estimate these fluxes to be 591 Gg N y and 99 Gg P y , respectively, with the Antarctic and Southern coasts receiving the highest N and P inputs. We show that these inputs are of similar magnitude to others considered in global N and P cycles, with concentrations per unit of surface area in seabird colonies among the highest measured on the Earth's surface. Finally, an important fraction of the total excreted N (72.5 Gg y ) and P (21.8 Gg y ) can be readily solubilized, increasing their short-term bioavailability in continental and coastal waters located near the seabird colonies.
[Mh] Termos MeSH primário: Aves/fisiologia
Ecossistema
Nitrogênio/metabolismo
Fósforo/metabolismo
[Mh] Termos MeSH secundário: Migração Animal/fisiologia
Animais
Regiões Antárticas
Aves/classificação
Conservação dos Recursos Naturais
Água Doce
Geografia
Ciclo do Nitrogênio
Oceanos e Mares
Água do Mar
Especificidade da Espécie
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
27YLU75U4W (Phosphorus); N762921K75 (Nitrogen)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180125
[St] Status:MEDLINE
[do] DOI:10.1038/s41467-017-02446-8


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[PMID]:29385175
[Au] Autor:Firdaus-Raih M; Hashim NHF; Bharudin I; Abu Bakar MF; Huang KK; Alias H; Lee BKB; Mat Isa MN; Mat-Sharani S; Sulaiman S; Tay LJ; Zolkefli R; Muhammad Noor Y; Law DSN; Abdul Rahman SH; Md-Illias R; Abu Bakar FD; Najimudin N; Abdul Murad AM; Mahadi NM
[Ad] Endereço:School of Biosciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia.
[Ti] Título:The Glaciozyma antarctica genome reveals an array of systems that provide sustained responses towards temperature variations in a persistently cold habitat.
[So] Source:PLoS One;13(1):e0189947, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Extremely low temperatures present various challenges to life that include ice formation and effects on metabolic capacity. Psyhcrophilic microorganisms typically have an array of mechanisms to enable survival in cold temperatures. In this study, we sequenced and analysed the genome of a psychrophilic yeast isolated in the Antarctic region, Glaciozyma antarctica. The genome annotation identified 7857 protein coding sequences. From the genome sequence analysis we were able to identify genes that encoded for proteins known to be associated with cold survival, in addition to annotating genes that are unique to G. antarctica. For genes that are known to be involved in cold adaptation such as anti-freeze proteins (AFPs), our gene expression analysis revealed that they were differentially transcribed over time and in response to different temperatures. This indicated the presence of an array of adaptation systems that can respond to a changing but persistent cold environment. We were also able to validate the activity of all the AFPs annotated where the recombinant AFPs demonstrated anti-freeze capacity. This work is an important foundation for further collective exploration into psychrophilic microbiology where among other potential, the genes unique to this species may represent a pool of novel mechanisms for cold survival.
[Mh] Termos MeSH primário: Adaptação Fisiológica/genética
Basidiomycota/fisiologia
Temperatura Baixa
Ecossistema
Genoma Fúngico
[Mh] Termos MeSH secundário: Regiões Antárticas
Proteínas Anticongelantes/genética
Basidiomycota/genética
Íntrons
RNA Nucleolar Pequeno/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Antifreeze Proteins); 0 (RNA, Small Nucleolar)
[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:180201
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0189947


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[PMID]:28951191
[Au] Autor:Zhang L; Zhang LB
[Ad] Endereço:Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, Yunnan 650201, PR China; Chengdu Institute of Biology, Chinese Academy of Sciences, P.O. Box 416, Chengdu, Sichuan 610041, PR China.
[Ti] Título:Phylogeny and systematics of the brake fern genus Pteris (Pteridaceae) based on molecular (plastid and nuclear) and morphological evidence.
[So] Source:Mol Phylogenet Evol;118:265-285, 2018 Jan.
[Is] ISSN:1095-9513
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The brake fern genus Pteris belongs to Pteridaceae subfamily Pteridoideae. It is one of the largest fern genera and has been estimated to contain 200-250 species distributed on all continents except Antarctica. Previous studies were either based on plastid data only or based on both plastid and nuclear data but the sampling was small. In addition, an infrageneric classification of Pteris based on morphological and molecular evidence has not been available yet. In the present study, based on molecular data of eight plastid markers and one nuclear marker (gapCp) of 256 accessions representing ca. 178 species of Pteris, we reconstruct a global phylogeny of Pteris. The 15 major clades identified earlier are recovered here and we further identified a new major clade. Our nuclear phylogeny recovered 11 of these 16 major clades, seven of which are strongly supported. The inclusion of Schizostege in Pteris is confirmed for the first time. Based on the newly reconstructed phylogeny and evidence from morphology, distribution and/or ecology, we classify Pteris into three subgenera: P. subg. Pteris, P. subg. Campteria, and P. subg. Platyzoma. The former two are further divided into three and 12 sections, respectively.
[Mh] Termos MeSH primário: Pteridaceae/classificação
[Mh] Termos MeSH secundário: Regiões Antárticas
Composição de Bases
Sequência de Bases
Núcleo Celular/genética
Filogenia
Proteínas de Plantas/classificação
Proteínas de Plantas/genética
Proteínas de Plantas/metabolismo
Plastídeos/classificação
Plastídeos/genética
Pteridaceae/genética
Alinhamento de Sequência
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Plant Proteins)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180220
[Lr] Data última revisão:
180220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170928
[St] Status:MEDLINE


  7 / 4277 MEDLINE  
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[PMID]:29388548
[Au] Autor:Jiang F; Danzeng W; Zhang Y; Zhang Y; Jiang L; Liu J; Lu L; Fan W; Peng F
[Ad] Endereço:1​Agricultural Genomics Institute, Chinese Academy of Agricultural Sciences, Shenzhen 518120, PR China.
[Ti] Título:Hymenobacter rubripertinctus sp. nov., isolated from Antarctic tundra soil.
[So] Source:Int J Syst Evol Microbiol;68(2):663-668, 2018 Feb.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A red-pigmented, Gram-reaction-negative, aerobic, non-motile and rod-shaped bacterium, designated NY03-3-30 , was isolated from a soil sample collected from Inexpressible Island, Northern Victoria Land of the Antarctic Ross Orogen, and subjected to a polyphasic taxonomic study. Growth occurred at 4-28 °C (optimum 20 °C) and at pH 6.0-9.0 (optimum pH 7.0). Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain NY03-3-30 belonged to the genus Hymenobacter in the family Cytophagaceae. 16S rRNA gene sequence similarities between strain NY03-3-30 and the type strains of Hymenobacter species with validly published names ranged from 92.7 to 96.2 %. Strain NY03-3-30 contained summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c), iso-C15 : 0, C16 : 0, C16 : 1ω5c, anteiso-C15 : 0 and summed feature 4 (iso-C17 : 1-I and/or anteiso-C17 : 1-B) as major cellular fatty acids, MK-7 as the respiratory quinone and phosphatidylethanolamine as the main polar lipid. The DNA G+C content of strain NY03-3-30 was 59.4 mol%. On the basis of phylogenetic, physiological and chemotaxonomic data, strain NY03-3-30 is considered to represent a novel species of genus Hymenobacter, for which the name Hymenobacter rubripertinctus sp. nov. is proposed. The type strain is NY03-3-30 (=CCTCC AB 2017095 =KCTC 62163 ).
[Mh] Termos MeSH primário: Cytophagaceae/classificação
Filogenia
Microbiologia do Solo
Tundra
[Mh] Termos MeSH secundário: Regiões Antárticas
Técnicas de Tipagem Bacteriana
Composição de Bases
Cytophagaceae/genética
Cytophagaceae/isolamento & purificação
DNA Bacteriano/genética
Ácidos Graxos/química
Fosfatidiletanolaminas/química
RNA Ribossômico 16S/genética
Análise de Sequência de DNA
Vitamina K 2/análogos & derivados
Vitamina K 2/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (Phosphatidylethanolamines); 0 (RNA, Ribosomal, 16S); 11032-49-8 (Vitamin K 2); 39382-08-6 (phosphatidylethanolamine); 8427BML8NY (vitamin MK 7)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180202
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002563


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[PMID]:29251588
[Au] Autor:Zhou MY; Zhang YJ; Zhang XY; Yang XD; He HL; Ning D; Du Z
[Ad] Endereço:1​Shandong Provincial Key Laboratory of Fine Chemicals, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, PR China.
[Ti] Título:Flavobacterium phocarum sp. nov., isolated from soils of a seal habitat in Antarctica.
[So] Source:Int J Syst Evol Microbiol;68(2):536-541, 2018 Feb.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A Gram-stain-negative, yellow-pigmented, non-flagellated, gliding, rod-shaped, oxidase-negative and catalase-positive bacterium, designated SE14 , was isolated from soil on King George Island, South Shetland Islands, Antarctica. Strain SE14 grew at 4-25 °C (optimum, 20 °C), at pH 6.0-9.0 (optimum, pH 7.0-7.5) and with 0-3.0 % NaCl (optimum, 1.0-1.5 %), and could not produce flexirubin-type pigments. 16S rRNA gene sequence analysis showed the the isolate belonged to the genus Flavobacterium. Strain SE14 had the highest 16S rRNA gene sequence similarity to Flavobacterium antarcticum, F. tegetincola and F. degerlachei with 95.8, 95.5 and 95.2 %, respectively. The strain SE14 consisted of a clade with Flavobacteriumnoncentrifugens (16S rRNA gene sequence similarity 94.9 %) and F. qiangtangense (16S rRNA gene sequence similarity 94.2 %) and simultaneously formed a distinct phyletic lineage in the neighbour-joining phylogenetic tree. Polar lipids of the strain included phosphatidylethanolamine and four unidentified aminolipids. Strain SE14 contained anteiso-C15 : 0, iso-C15 : 0 and a mixture of iso-C15 : 0 2-OH and/or C16 : 1ω7c as the main fatty acids, and the only respiratory quinone was menaquinone-6. The genomic DNA G+C content was 42.3 mol%. The polyphasic taxonomic study revealed that strain SE14 belongs to a novel species within the genus Flavobacterium , and the name Flavobacterium phocarum sp. nov. is proposed. The type strain is SE14 (=CCTCC AB 2017225 =KCTC 52612 ).
[Mh] Termos MeSH primário: Flavobacterium/classificação
Filogenia
Focas Verdadeiras
Microbiologia do Solo
[Mh] Termos MeSH secundário: Animais
Regiões Antárticas
Técnicas de Tipagem Bacteriana
Composição de Bases
DNA Bacteriano/genética
Ácidos Graxos/química
Flavobacterium/genética
Flavobacterium/isolamento & purificação
Fosfatidiletanolaminas/química
Pigmentação
RNA Ribossômico 16S/genética
Análise de Sequência de DNA
Vitamina K 2/análogos & derivados
Vitamina K 2/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (Phosphatidylethanolamines); 0 (RNA, Ribosomal, 16S); 11032-49-8 (Vitamin K 2); 39382-08-6 (phosphatidylethanolamine); 71ANL51TLA (menaquinone 6)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180212
[Lr] Data última revisão:
180212
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171219
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002535


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[PMID]:29329926
[Au] Autor:Li Y; Luo J; Xu Q; Hou Y; Jiang P; Sun Y; Lu H; Han B; Zhang J
[Ad] Endereço:Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources (Shanghai Ocean University), Ministry of Education, Shanghai 201306, China; National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China.
[Ti] Título:Characterization of Selenoprotein P cDNA of the Antarctic toothfish Dissostichus mawsoni and its role under cold pressure.
[So] Source:Gene;647:150-156, 2018 Mar 20.
[Is] ISSN:1879-0038
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:Our previous study using comparative genome analysis revealed a significant gene copy number gain of Dissostichus mawsoni selenoprotein P (Dm-SEPP) during the evolutionary radiation of Antarctic notothenioids, suggesting that Dm-SEPP contribute to this process, but the detailed structure and function of this gene product remain unclear. In the present study, the Dm-SEPP cDNA was cloned and characterized. The Dm-SEPP cDNA contains 17 selenocysteines (Sec) encoded by TGA codons and 2 typical SECIS elements located in the 3'-UTR. Evolutionary analysis of the Dm-SEPP gene revealed that it's closely related to the SEPP gene of zebrafish (Danio rerio), showing 51% amino acid similarity. Over-expression of Dm-SEPP could protect mammalian cells under cold pressure, probably via eliminating ROS. Further study showed an increase of endogenous SEPP in zebrafish ZF4 cells under cold pressure, and knockdown of SEPP decreased cell viability, accompanied with increased ROS. Our results suggested a protective role of Dm-SEPP in cold adaptation in Antarctic notothenioids.
[Mh] Termos MeSH primário: DNA Complementar/genética
Perciformes/genética
Selenoproteína P/genética
Estresse Fisiológico/genética
[Mh] Termos MeSH secundário: Regiões 3' não Traduzidas/genética
Animais
Regiões Antárticas
Temperatura Baixa
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (3' Untranslated Regions); 0 (DNA, Complementary); 0 (Selenoprotein P)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180209
[Lr] Data última revisão:
180209
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180114
[St] Status:MEDLINE


  10 / 4277 MEDLINE  
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[PMID]:29205131
[Au] Autor:Li AZ; Han XB; Lin LZ; Zhang MX; Zhu HH
[Ad] Endereço:1​State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Microbial Culture Collection Center (GDMCC), Guangdong Institute of Microbiology, Guangzhou 510070,  PR China.
[Ti] Título:Gramella antarctica sp. nov., isolated from marine surface sediment.
[So] Source:Int J Syst Evol Microbiol;68(1):358-363, 2018 Jan.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A Gram-stain-negative, aerobic, yellow-coloured, motile by gliding, rod-shaped bacterial strain, designated R17H11 , was isolated from surface sediment collected from the Ross Sea, Antarctica. Growth optimally occurred at 25-30 °C, at pH 7.0-7.5 and in the presence of 3 % NaCl (w/v). Phylogenetic trees based on 16S rRNA gene sequences indicated that strain R17H11 clustered together with Gramella flava JLT2011 and fell within the genus Gramella. Strain R17H11 shared the highest 16S rRNA gene similarities (96.1 and 96.0 %) with the type strains of Gramella forsetii and G. flava, and 92.6-95.5 % similarities with those of other known Gramella species. Strain R17H11 contained menaquinone-6 as the only isoprenoid quinone. The major fatty acids (>5 %) were summed feature 3 (17.5 %, comprising C16 : 1ω7c and/or C16 : 1ω6c), iso-C15 : 0 (14.0 %), summed feature 9 (11.8 %, comprising 10-methyl C16 : 0 and/or iso-C17 : 1ω9c), iso-C17 : 0 3-OH (11.8 %), iso-C16 : 0 (7.4 %), C17 : 1ω6c (6.9 %) and anteiso-C15 : 0 (5.1 %). The major polar lipids were phosphatidylethanolamine, four unidentified lipids, an unidentified aminolipid, an unidentified aminophospholipid and an unidentified glycolipid. The DNA G+C content of strain R17H11 was 38.6 mol%. On the basis of the phylogenetic, physiological and chemotaxonomic characteristics, strain R17H11 represents a novel species in the genus Gramella, for which the name Gramellaantarctica sp. nov. is proposed. The type strain of the novel species is R17H11 (=GDMCC 1.1208 =KCTC 52925 ).
[Mh] Termos MeSH primário: Flavobacteriaceae/classificação
Sedimentos Geológicos/microbiologia
Filogenia
Água do Mar/microbiologia
[Mh] Termos MeSH secundário: Regiões Antárticas
Técnicas de Tipagem Bacteriana
Composição de Bases
DNA Bacteriano/genética
Ácidos Graxos/química
Flavobacteriaceae/genética
Flavobacteriaceae/isolamento & purificação
Fosfolipídeos/química
Pigmentação
RNA Ribossômico 16S/genética
Análise de Sequência de DNA
Vitamina K 2/análogos & derivados
Vitamina K 2/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (Phospholipids); 0 (RNA, Ribosomal, 16S); 11032-49-8 (Vitamin K 2); 71ANL51TLA (menaquinone 6)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180209
[Lr] Data última revisão:
180209
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171206
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002513



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