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[PMID]:29381768
[Au] Autor:Meireles RC; Teixeira JPG; Solar R; Vasconcelos BNF; Fernandes RBA; Lopes LE
[Ad] Endereço:Pós-graduação em Biologia Animal, CCB, Universidade Federal de Viçosa - Campus Viçosa, Viçosa, Minas Gerais, Brazil.
[Ti] Título:Soil attributes drive nest-site selection by the campo miner Geositta poeciloptera.
[So] Source:PLoS One;13(1):e0192185, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Substrate type is a key-factor in nest-site selection and nest architecture of burrowing birds. However, little is known about which factors drive nest-site selection for these species, especially in the tropics. We studied the influence of soil attributes on nest-site selection by the campo miner Geositta poeciloptera, an open grassland bird that builds its nests within soil cavities. For all nests found, we measured the depth of the nest cavity and the resistance of the soil to penetration, and identified the soil horizon in which the nest was located. In soil banks with nests, we collected soil samples for granulometric analysis around each nest cavity, while in soil banks without nests we collected these samples at random points. From 43 nests found, 86% were located in the deeper soil horizons (C-horizon), and only 14% in the shallower horizons (B-horizon). Granulometric analysis showed that the C-horizons possessed a high similar granulometric composition, with high silt and low clay contents. These characteristics are associated with a low degree of structural development of the soil, which makes it easier to excavate. Contrarily, soil resistance to penetration does not seem to be an important criterion for nest site selection, although nests in more resistant the soils tend to have shallower nest cavities. Among the soil banks analyzed, 40% of those without cavities possessed a larger proportion of B-horizon relative to the C-horizon, and their texture was more clayey. On the other hand, almost all soil banks containing nest cavities had a larger C-horizon and a silty texture, indicating that soil attributes drive nest-site selection by G. poeciloptera. Thus, we conclude that the patchy distribution of G. poeciloptera can attributed to the infrequent natural exposure of the C-horizon in the tropical region, where well developed, deep and permeable soils are more common.
[Mh] Termos MeSH primário: Comportamento de Nidação
Passeriformes/fisiologia
Solo
[Mh] Termos MeSH secundário: Animais
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (Soil)
[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:180131
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0192185


  2 / 2543 MEDLINE  
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[PMID]:29175405
[Au] Autor:Yang F; Xie S; Liu J; Wei C; Zhang H; Chen T; Zhang J
[Ad] Endereço:Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; Key Laboratory of Land Surface Pattern and Simulation, Chinese Academy of Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
[Ti] Título:Arsenic concentrations and speciation in wild birds from an abandoned realgar mine in China.
[So] Source:Chemosphere;193:777-784, 2018 Feb.
[Is] ISSN:1879-1298
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Birds are at a higher level in the food chain; however, the potential bioaccumulation and biotransformation of arsenic (As) in birds in As mines has rarely been studied. In this study, four passerine bird species (tree sparrow [Passer montanus], light-vented bulbul [Pycnonotus sinensis], Garrulax canorus [Leucodioptron canorus], and magpie [Pica pica]) were collected from an abandoned As mine in China. The highest recorded As concentrations were 4.95 mg/kg and 51.65 mg/kg in muscles and feathers, respectively. Detection using high-performance liquid chromatography inductively coupled plasma mass spectrometry (HPLC-ICP-MS) revealed six As species, including arsenite (As(III)), arsenate (As(V)), dimethylarsinic acid (DMA), monomethylarsonic acid (MMA), arsenobetaine (AsB) and arsenocholine (AsC), with the former three species as the dominant (>92%) and the latter three as the minor As species (<6.17%). Further analysis of the selected bird samples using the X-ray absorption near edge structure (XANES) technique revealed the existence of As(III)-tris-glutathione (As(III)-GSH), which can be regarded as equivalent to the non-extractable and unidentified As form in the HPLC-ICP-MS data. Both methods revealed similar patterns of As species in the birds from the As mine, with muscles containing mainly inorganic As and DMA and feathers containing mainly inorganic As. The results of this study contribute to the knowledge regarding As accumulation and speciation in terrestrial organisms.
[Mh] Termos MeSH primário: Arsênico/análise
Arsenicais/análise
Aves
Mineração
[Mh] Termos MeSH secundário: Animais
Arseniatos
Arsênico/química
Arsenitos
Ácido Cacodílico/análise
China
Cromatografia Líquida de Alta Pressão/métodos
Plumas/química
Espectrometria de Massas/métodos
Músculo Esquelético/química
Passeriformes
Sulfetos
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Arsenates); 0 (Arsenicals); 0 (Arsenites); 0 (Sulfides); 39895-81-3 (arsenocholine); 56320-22-0 (arsenic disulfide); AJ2HL7EU8K (Cacodylic Acid); J37VJ5709S (monomethylarsonic acid); N5509X556J (arsenite); N712M78A8G (Arsenic); N7CIZ75ZPN (arsenic acid); UWC1LS4V3I (arsenobetaine)
[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:171128
[St] Status:MEDLINE


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[PMID]:28841527
[Au] Autor:Crocker DR; Lawrence AJ
[Ad] Endereço:Brook House, Dam Lane, Leavening, North Yorkshire, YO17 9SJ, UK. Electronic address: joe_crocker@btinternet.com.
[Ti] Título:Estimating the potential effects of pesticide seed treatments on the reproductive success of arable birds.
[So] Source:Ecotoxicol Environ Saf;147:124-131, 2018 Jan.
[Is] ISSN:1090-2414
[Cp] País de publicação:Netherlands
[La] Idioma:eng
[Ab] Resumo:In temperate zones, seeds of spring-sown crops may be an attractive food source for breeding farmland birds. We modelled the effects of pesticide seed treatments on the reproductive success of 4 UK arable bird species (Rook, Linnet, Skylark, Yellowhammer) exposed to treated seeds of 3 spring-sown crops (beans, barley and linseed). We ran three types of model, 1) a "broods-at-risk" model looking at the temporal overlap between nesting and seed-sowing dates, and estimating the proportion of those nests that suffered toxicity-exposure ratios < 5; 2) a "seasonal success" Markov chain model estimating the number of chicks successfully raised in the course of a breeding season.; and 3) the potential effects of pesticides on population growth rates. Based on physiology, Rooks, should be less at risk from treated seeds than smaller species because bigger birds eat less as a proportion of their bodyweights. However, in nearly all our scenarios, Rooks were more vulnerable, followed by Skylark and Linnet, with Yellowhammer being least affected. A principal cause is that Rooks are more likely to be breeding at a time when treated seeds are being sown. Furthermore, whereas the other species may make several breeding attempts and early failures from pesticide exposure may be compensated by later successes, Rooks breed only once in a season. The results are also supported by historical evidence of Rook population declines following pesticide seed treatments.
[Mh] Termos MeSH primário: Produtos Agrícolas/crescimento & desenvolvimento
Poluentes Ambientais/toxicidade
Modelos Teóricos
Passeriformes/fisiologia
Praguicidas/toxicidade
Reprodução/efeitos dos fármacos
Sementes/crescimento & desenvolvimento
[Mh] Termos MeSH secundário: Animais
Ingestão de Alimentos
Monitoramento Ambiental
Poluentes Ambientais/farmacologia
Cadeias de Markov
Praguicidas/farmacologia
Reino Unido
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Environmental Pollutants); 0 (Pesticides)
[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:170826
[St] Status:MEDLINE


  4 / 2543 MEDLINE  
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[PMID]:29317637
[Au] Autor:McCoy DE; Feo T; Harvey TA; Prum RO
[Ad] Endereço:Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, 02138, USA. dakotamccoy@g.harvard.edu.
[Ti] Título:Structural absorption by barbule microstructures of super black bird of paradise feathers.
[So] Source:Nat Commun;9(1):1, 2018 01 09.
[Is] ISSN:2041-1723
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Many studies have shown how pigments and internal nanostructures generate color in nature. External surface structures can also influence appearance, such as by causing multiple scattering of light (structural absorption) to produce a velvety, super black appearance. Here we show that feathers from five species of birds of paradise (Aves: Paradisaeidae) structurally absorb incident light to produce extremely low-reflectance, super black plumages. Directional reflectance of these feathers (0.05-0.31%) approaches that of man-made ultra-absorbent materials. SEM, nano-CT, and ray-tracing simulations show that super black feathers have titled arrays of highly modified barbules, which cause more multiple scattering, resulting in more structural absorption, than normal black feathers. Super black feathers have an extreme directional reflectance bias and appear darkest when viewed from the distal direction. We hypothesize that structurally absorbing, super black plumage evolved through sensory bias to enhance the perceived brilliance of adjacent color patches during courtship display.
[Mh] Termos MeSH primário: Plumas/ultraestrutura
Luz
Passeriformes/fisiologia
[Mh] Termos MeSH secundário: Animais
Fenômenos Biofísicos
Simulação por Computador
Plumas/fisiologia
Processamento de Imagem Assistida por Computador
Masculino
Microscopia Eletrônica de Varredura
Especificidade da Espécie
Tomografia Computadorizada por Raios X/métodos
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
[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:180111
[St] Status:MEDLINE
[do] DOI:10.1038/s41467-017-02088-w


  5 / 2543 MEDLINE  
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[PMID]:29404701
[Au] Autor:Badás EP; Martínez J; Rivero-de Aguilar J; Ponce C; Stevens M; Merino S
[Ad] Endereço:Department of Evolutionary Ecology, National Museum of Natural Sciences, Jose Gutierrez Abascal 2, 28006, Madrid, Spain. E.Perez@leeds.ac.uk.
[Ti] Título:Colour change in a structural ornament is related to individual quality, parasites and mating patterns in the blue tit.
[So] Source:Naturwissenschaften;105(1-2):17, 2018 Feb 06.
[Is] ISSN:1432-1904
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:Carry-over effects refer to processes that occur in one season and influence fitness in the following. In birds, two costly activities, namely reproduction and moult, are restricted to a small time window, and sometimes overlap. Thus, colour in newly moulted feathers is likely to be affected by the costs of reproduction. Using models of bird vision we investigated male colour change in a free-living population of blue tits (Cyanistes caeruleus) in three sampling occasions: spring 1, winter and spring 2. We related crown, tail, breast and cheek feather colouration after the moult (winter) to the intensity of infections by blood parasites during reproduction (spring 1). In the following spring (spring 2), we explored mating patterns with respect to changes in feather colour (springs 1 vs. 2). Males that were less intensely infected by the malaria parasite Plasmodium while breeding showed purer white cheek feathers in winter, which may indicate higher feather quality. Increased brightness in the white cheek was associated with better body condition during reproduction. In the following season, males with brighter cheeks paired with females that had noticeably brighter cheek patches compared to the male's previous mate. These results suggest that the conditions experienced during reproduction are likely to affect moult and thus feather colouration, at least in the white patch. High quality individuals may allocate resources efficiently during reproduction increasing future reproductive success through variation in mating patterns. Carry-over effects from reproduction might extend not only to the non-breeding phase, but also to the following breeding season.
[Mh] Termos MeSH primário: Doenças das Aves/fisiopatologia
Plumas/fisiologia
Malária/veterinária
Passeriformes/fisiologia
Passeriformes/parasitologia
Pigmentação/fisiologia
[Mh] Termos MeSH secundário: Animais
Cruzamento
Feminino
Malária/fisiopatologia
Masculino
Passeriformes/anatomia & histologia
Plasmodium/fisiologia
Comportamento Sexual Animal/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180302
[Lr] Data última revisão:
180302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180207
[St] Status:MEDLINE
[do] DOI:10.1007/s00114-018-1539-z


  6 / 2543 MEDLINE  
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[PMID]:28951253
[Au] Autor:Musher LJ; Cracraft J
[Ad] Endereço:The Richard Gilder Graduate School, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024, USA; Department of Ecology, Evolution, and Environmental Biology, Columbia University, New York, NY 10027, USA; Department of Ornithology, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024, USA. Electronic address: lmusher@amnh.org.
[Ti] Título:Phylogenomics and species delimitation of a complex radiation of Neotropical suboscine birds (Pachyramphus).
[So] Source:Mol Phylogenet Evol;118:204-221, 2018 Jan.
[Is] ISSN:1095-9513
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Phylogeographic studies within the Neotropics continue to uncover hidden diversity, the extent of which remains poorly known. In birds, molecular studies are producing evidence that species-level diversity is substantially underestimated. Many avian taxa comprise large complexes of subspecies that often represent species-level taxa by various criteria. One such group of Neotropical suboscine birds, the becards (Pachyramphus), ranges from Argentina through northern Mexico. Their taxonomic limits have been complex and controversial as the genus has bounced around a number of suboscine families. Additionally, the phylogenetic relationships within Pachyramphus are unresolved due to insufficient sampling of taxa and populations across species' ranges. We used target capture of ultraconserved elements for 62 individuals representing 42 taxa, and sequenced two mitochondrial genes and two nuclear introns covering 265 individuals of 51 taxa, including all recognized species, resulting in the most densely and completely sampled phylogenetic hypothesis for Pachyramphus to date. We delimited species using a traditional taxonomic approach and then tested them under a Bayesian multi-species coalescent framework. In doing so, we provide evidence for multiple young, previously undetected evolutionary lineages within Pachyramphus. Deep, well-supported branches and a high number of intraspecific lineages across the tree suggest that at least 50% of species diversity may be unrecognized.
[Mh] Termos MeSH primário: Genômica
Passeriformes/classificação
Passeriformes/genética
Filogenia
Clima Tropical
[Mh] Termos MeSH secundário: Animais
Argentina
Sequência de Bases
Teorema de Bayes
DNA Mitocondrial/genética
Loci Gênicos
Funções Verossimilhança
México
Filogeografia
Especificidade da Espécie
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Mitochondrial)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180302
[Lr] Data última revisão:
180302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170928
[St] Status:MEDLINE


  7 / 2543 MEDLINE  
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[PMID]:28834700
[Au] Autor:Bowie RCK; Pasquet E; McEntee JP; Njilima F; Fjeldså J
[Ad] Endereço:Museum of Vertebrate Zoology and Department of Integrative Biology, 3101 Valley Life Science Building, University of California, Berkeley, CA 94720-3160, USA. Electronic address: bowie@berkeley.edu.
[Ti] Título:The systematics and biogeography of African tailorbirds (Cisticolidae: Artisornis) with comment on the choice of Bayesian branch-length prior when analyzing heterogeneous data.
[So] Source:Mol Phylogenet Evol;118:172-183, 2018 Jan.
[Is] ISSN:1095-9513
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The Long-billed Tailorbird (Artisornis moreaui), one of Africa's rarest birds, has a strikingly disjunct distribution, the origin of which has long puzzled biogeographers. One small population (subspecies moreaui) occurs in sub-montane forest in the East Usambara Mountains, a sky island near the coast of northern Tanzania, and another (subspecies sousae) on Serra Jeci in northwestern Mozambique, 950km away. The African Tailorbird, the putative sister-species of Long-billed Tailorbird, also occurs in the East Usambara Mountains and on Serra Jeci, but in addition occupies all the Eastern Arc Mountain forests between these disjunct sites. Stuart (1981) hypothesized that the two tailorbird distributions could be explained by strong ecological competition, with African Tailorbird populations having eliminated Long-billed Tailorbird populations via competitive exclusion in montane forests between the East Usambara and Serra Jeci. If such competitive exclusion explains these geographic distributions, the co-occurrence of the two species in the East Usambara and at Serra Jeci may be ephemeral, with the status of Long-billed Tailorbird especially in doubt. We sought to (1) determine whether the two species of African tailorbirds are indeed sister-species, and (2) test predictions from Stuart's (1981) competitive exclusion hypothesis using genetic data. Phylogenetic analyses of our seven gene dataset (3 mtDNA, 4 introns; 4784bp) indeed place these two species together in the genus Artisornis. Instead of finding shallow divergence among African Tailorbird populations and deep divergence between Long-billed Tailorbird populations as expected from Stuart's hypothesis, we recover deep genetic divergence and geographic structure among populations of both tailorbird species. This result is consistent with long-term co-existence of the two species at East Usambara and Serra Jeci. Observational data from both the East Usambara and Serra Jeci suggest that the two species have diverged in use of forest canopy strata. From a conservation standpoint, our results suggest that extinction of the Long-billed Tailorbird as a function of competition with African Tailorbird is highly unlikely, and should not be viewed as imminent. Threats to its survival are instead anthropogenic, and conservation measures should take this into account. Finally, our empirical results suggest that mis-specification of the branch-length prior in Bayesian analyses of mitochondrial DNA data can have a profound effect on the overall tree-length (sum of branch-lengths), whereas the topology and support values tend to remain more stable. In contrast, mis-specification of the branch-length prior had a lesser impact on all aspects of the nuclear-only DNA analyses. This problem may be exacerbated when mitochondrial and nuclear DNA analyses are combined in a total evidence approach.
[Mh] Termos MeSH primário: Passeriformes/classificação
Filogeografia
Estatística como Assunto
[Mh] Termos MeSH secundário: Animais
Teorema de Bayes
DNA Mitocondrial/genética
Loci Gênicos
Moçambique
Passeriformes/genética
Filogenia
Tanzânia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Mitochondrial)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180302
[Lr] Data última revisão:
180302
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170824
[St] Status:MEDLINE


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[PMID]:28462486
[Au] Autor:Diatroptov MЕ; Diatroptova MA
[Ad] Endereço:Research Institute of Human Morphology, Moscow, Russia.
[Ti] Título:Infradian Biorhythm of Thyroid Hormone Concentrations in Mammals and Birds.
[So] Source:Bull Exp Biol Med;162(6):815-819, 2017 Apr.
[Is] ISSN:1573-8221
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Studies of the dynamics of thyroid hormone concentrations in the blood revealed a 3-day rhythm that significantly manifested in male Wistar rats and Chinchilla rabbits during intensive growth and in common starlings (Sturnus vulgaris) during moult. Synphasic 3-day biorhythms of thyroid hormonal activities were found in these animals, which attested to an external synchronizer of this biorhythm common for mammals and birds. The maximum level of thyroid hormones coincided with the extrema of daily fluctuations of the Earth rotation velocity, as a result of which this external factor or another factor closely related to it seemed to be involved in synchronization of the 3-day infradian biorhythm of thyroid hormones in mammals and birds.
[Mh] Termos MeSH primário: Corticosterona/sangue
Passeriformes/fisiologia
Periodicidade
Glândula Tireoide/fisiologia
Tiroxina/sangue
Tri-Iodotironina/sangue
[Mh] Termos MeSH secundário: Animais
Geografia
Masculino
Muda/fisiologia
Coelhos
Ratos
Ratos Wistar
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
06LU7C9H1V (Triiodothyronine); Q51BO43MG4 (Thyroxine); W980KJ009P (Corticosterone)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180223
[Lr] Data última revisão:
180223
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170503
[St] Status:MEDLINE
[do] DOI:10.1007/s10517-017-3720-3


  9 / 2543 MEDLINE  
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[PMID]:29405684
[Au] Autor:Leonovich SA; Filimonova SA
[Ti] Título:[The quill mite Syringophilopsis fringilla (Fritsch) (Acari: Trombidiformes: Syringophilidae): The structure of receptor organs providing feeding of the parasite inside the feather quill].
[So] Source:Parazitologiia;51(2):121-31, 2017 Mar-Apr.
[Is] ISSN:0031-1847
[Cp] País de publicação:Russia (Federation)
[La] Idioma:rus
[Ab] Resumo:The structure of sensory organs situated on palps and inside the cheliceral stylet of the quill mite Sringophilopsis fringilla (Fritsch, 1958) was examined in scanning and transmitting electron microscopes. Eight sensilla of 3 types were revealed on palptarsus, including two contact chemo-mechanosensory sensilla, a single distant chemosensory (probably olfactory) sensillum, and 5 tactile mechanosensitive sensilla. All other sensilla situated on basas parts of the palp and on the outer surface of gnathosoma are represented by tactile mechanoreceptors. A proprioceptor sensillum was revealed in the movable digit of the chelicera; modified cilia of dendrites of 5 sensory neurons run in the inner non-sclerotized core of the stylet, ending at different levels as electron-dense rods connected with the sclerotized wall of the stylet. The authors assume that the proprioceptor sensillum of the stylet detects the pressing force of the movable digit on the inner wall of the quill during piercing process, while papal sensilla determine the optimal place for piercing.
[Mh] Termos MeSH primário: Plumas/parasitologia
Mecanorreceptores/ultraestrutura
Ácaros/ultraestrutura
Passeriformes/parasitologia
Sensilas/ultraestrutura
[Mh] Termos MeSH secundário: Animais
Feminino
Linfa/parasitologia
Mecanorreceptores/fisiologia
Ácaros/fisiologia
Sensilas/fisiologia
Olfato/fisiologia
Percepção do Tato/fisiologia
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180222
[Lr] Data última revisão:
180222
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180207
[St] Status:MEDLINE


  10 / 2543 MEDLINE  
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[PMID]:29217583
[Au] Autor:Yin Y; Wu M; Zubcevic L; Borschel WF; Lander GC; Lee SY
[Ad] Endereço:Department of Biochemistry, Duke University School of Medicine, Durham, NC 27710, USA.
[Ti] Título:Structure of the cold- and menthol-sensing ion channel TRPM8.
[So] Source:Science;359(6372):237-241, 2018 01 12.
[Is] ISSN:1095-9203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Transient receptor potential melastatin (TRPM) cation channels are polymodal sensors that are involved in a variety of physiological processes. Within the TRPM family, member 8 (TRPM8) is the primary cold and menthol sensor in humans. We determined the cryo-electron microscopy structure of the full-length TRPM8 from the collared flycatcher at an overall resolution of ~4.1 ångstroms. Our TRPM8 structure reveals a three-layered architecture. The amino-terminal domain with a fold distinct among known TRP structures, together with the carboxyl-terminal region, forms a large two-layered cytosolic ring that extensively interacts with the transmembrane channel layer. The structure suggests that the menthol-binding site is located within the voltage-sensor-like domain and thus provides a structural glimpse of the design principle of the molecular transducer for cold and menthol sensation.
[Mh] Termos MeSH primário: Proteínas Aviárias/química
Mentol/metabolismo
Passeriformes/metabolismo
Canais de Cátion TRPM/química
[Mh] Termos MeSH secundário: Animais
Proteínas Aviárias/metabolismo
Proteínas Aviárias/ultraestrutura
Sítios de Ligação
Temperatura Baixa
Microscopia Crioeletrônica
Processamento de Imagem Assistida por Computador
Modelos Moleculares
Domínios Proteicos
Dobramento de Proteína
Estrutura Secundária de Proteína
Subunidades Proteicas
Canais de Cátion TRPM/metabolismo
Canais de Cátion TRPM/ultraestrutura
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL
[Nm] Nome de substância:
0 (Avian Proteins); 0 (Protein Subunits); 0 (TRPM Cation Channels); 1490-04-6 (Menthol)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180216
[Lr] Data última revisão:
180216
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171209
[St] Status:MEDLINE
[do] DOI:10.1126/science.aan4325



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