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Registro Completo |
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Biblioteca(s): |
Embrapa Agroenergia. |
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Data corrente: |
27/01/2021 |
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Data da última atualização: |
27/01/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SOUTO, B. de M.; ARAÚJO, A. C. B. de; HAMANN, P. R. V.; BASTOS, A. de R.; CUNHA, I. de S.; PEIXOTO, J.; KRUGER, R. H.; NORONHA, E. F.; QUIRINO, B. F. |
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Afiliação: |
BETULIA DE MORAIS SOUTO, CNPAE; Ana Carolina Bitencourt de Araújo; Pedro Ricardo Vieira Hamann, Universidade de Brasília; Andrêssa de Rezende Bastos; Isabel de Souza Cunha, Universidade Católica de Brasília; Julianna Peixoto, Universidade de Brasília; Ricardo Henrique Kruger, Universidade de Brasília; Eliane Ferreira Noronha, Universidade de Brasília; BETANIA FERRAZ QUIRINO, CNPAE. |
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Título: |
Functional screening of a Caatinga goat (Capra hircus) rumen metagenomic library reveals a novel GH3 beta-xylosidase. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
PLoS ONE, v. 16, n. 1, e024511, 2021. |
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DOI: |
https://doi.org/10.1371/journal.pone.0245118 |
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Idioma: |
Inglês |
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Conteúdo: |
Functional screening of metagenomic libraries is an effective approach for identification of novel enzymes. A Caatinga biome goat rumen metagenomic library was screened using esculin as a substrate, and a gene from an unknown bacterium encoding a novel GH3 enzyme, BGL11, was identified. None of the BGL11 closely related genes have been previously characterized. Recombinant BGL11 was obtained and kinetically characterized. Substrate specificity of the purified protein was assessed using seven synthetic aryl substrates. Activity towards nitrophenyl-beta-D-glucopyranoside (pNPG), 4-nitrophenyl- beta -D-xylopyranoside (pNPX) and 4-nitrophenyl- beta -D-cellobioside (pNPC) suggested that BGL11 is a multifunctional enzyme with beta-glucosidase, beta-xylosidase, and cellobiohydrolase activities. However, further testing with five natural substrates revealed that, although BGL11 has multiple substrate specificity, it is most active towards xylobiose. Thus, in its native goat rumen environment, BGL11 most likely functions as an extracellular beta-xylosidase acting on hemicellulose. Biochemical characterization of BGL11 showed an optimal pH of 5.6, and an optimal temperature of 50°C. Enzyme stability, an important parameter for industrial application, was also investigated. At 40°C purified BGL11 remained active for more than 15 hours without reduction in activity, and at 50°C, after 7 hours of incubation, BGL11 remained 60% active. In contrast to BLG11, most beta-xylosidases kinetically studied belong to the GH43 family and have been characterized only using synthetic substrates. In industry, beta-xylosidases can be used for plant biomass deconstruction, and the released sugars can be fermented into valuable bio-products, ranging from the biofuel ethanol to the sugar substitute xylitol. MenosFunctional screening of metagenomic libraries is an effective approach for identification of novel enzymes. A Caatinga biome goat rumen metagenomic library was screened using esculin as a substrate, and a gene from an unknown bacterium encoding a novel GH3 enzyme, BGL11, was identified. None of the BGL11 closely related genes have been previously characterized. Recombinant BGL11 was obtained and kinetically characterized. Substrate specificity of the purified protein was assessed using seven synthetic aryl substrates. Activity towards nitrophenyl-beta-D-glucopyranoside (pNPG), 4-nitrophenyl- beta -D-xylopyranoside (pNPX) and 4-nitrophenyl- beta -D-cellobioside (pNPC) suggested that BGL11 is a multifunctional enzyme with beta-glucosidase, beta-xylosidase, and cellobiohydrolase activities. However, further testing with five natural substrates revealed that, although BGL11 has multiple substrate specificity, it is most active towards xylobiose. Thus, in its native goat rumen environment, BGL11 most likely functions as an extracellular beta-xylosidase acting on hemicellulose. Biochemical characterization of BGL11 showed an optimal pH of 5.6, and an optimal temperature of 50°C. Enzyme stability, an important parameter for industrial application, was also investigated. At 40°C purified BGL11 remained active for more than 15 hours without reduction in activity, and at 50°C, after 7 hours of incubation, BGL11 remained 60% active. In contrast to BLG11, most beta-xylosidases kinetical... Mostrar Tudo |
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Thesagro: |
Clonagem; Enzima; Peptídeo; Programa de Computador. |
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Thesaurus Nal: |
Cloning (animals); Computer software; Enzymes; Metagenomics; Prevotella; Screening; Signal peptide. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/220708/1/Functional-screening-of-a-Caatinga-goat-2021.pdf
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Marc: |
LEADER 02852naa a2200361 a 4500
001 2129624
005 2021-01-27
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1371/journal.pone.0245118$2DOI
100 1 $aSOUTO, B. de M.
245 $aFunctional screening of a Caatinga goat (Capra hircus) rumen metagenomic library reveals a novel GH3 beta-xylosidase.$h[electronic resource]
260 $c2021
520 $aFunctional screening of metagenomic libraries is an effective approach for identification of novel enzymes. A Caatinga biome goat rumen metagenomic library was screened using esculin as a substrate, and a gene from an unknown bacterium encoding a novel GH3 enzyme, BGL11, was identified. None of the BGL11 closely related genes have been previously characterized. Recombinant BGL11 was obtained and kinetically characterized. Substrate specificity of the purified protein was assessed using seven synthetic aryl substrates. Activity towards nitrophenyl-beta-D-glucopyranoside (pNPG), 4-nitrophenyl- beta -D-xylopyranoside (pNPX) and 4-nitrophenyl- beta -D-cellobioside (pNPC) suggested that BGL11 is a multifunctional enzyme with beta-glucosidase, beta-xylosidase, and cellobiohydrolase activities. However, further testing with five natural substrates revealed that, although BGL11 has multiple substrate specificity, it is most active towards xylobiose. Thus, in its native goat rumen environment, BGL11 most likely functions as an extracellular beta-xylosidase acting on hemicellulose. Biochemical characterization of BGL11 showed an optimal pH of 5.6, and an optimal temperature of 50°C. Enzyme stability, an important parameter for industrial application, was also investigated. At 40°C purified BGL11 remained active for more than 15 hours without reduction in activity, and at 50°C, after 7 hours of incubation, BGL11 remained 60% active. In contrast to BLG11, most beta-xylosidases kinetically studied belong to the GH43 family and have been characterized only using synthetic substrates. In industry, beta-xylosidases can be used for plant biomass deconstruction, and the released sugars can be fermented into valuable bio-products, ranging from the biofuel ethanol to the sugar substitute xylitol.
650 $aCloning (animals)
650 $aComputer software
650 $aEnzymes
650 $aMetagenomics
650 $aPrevotella
650 $aScreening
650 $aSignal peptide
650 $aClonagem
650 $aEnzima
650 $aPeptídeo
650 $aPrograma de Computador
700 1 $aARAÚJO, A. C. B. de
700 1 $aHAMANN, P. R. V.
700 1 $aBASTOS, A. de R.
700 1 $aCUNHA, I. de S.
700 1 $aPEIXOTO, J.
700 1 $aKRUGER, R. H.
700 1 $aNORONHA, E. F.
700 1 $aQUIRINO, B. F.
773 $tPLoS ONE$gv. 16, n. 1, e024511, 2021.
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Registro original: |
Embrapa Agroenergia (CNPAE) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
17/09/2020 |
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Data da última atualização: |
01/12/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
ALVES, J. R. A.; FARIAS, A. E. M. de; SILVA, J. D. da; VIANA, M. P.; LIMA, A. M. C.; FACCIOLI-MARTINS, P. Y.; PINHEIRO, R. R.; ALVES, F. S. F.; AZEVEDO, S. S. de; ALVES, C. J. |
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Afiliação: |
JOSÉ ROMERO ALEXANDRE ALVES, Universidade Federal de Campina Grande (UFCG) - Patos, PB, Brazil; AREANO ETHÉRIO MOREIRA DE FARIAS, Universidade Federal de Campina Grande (UFCG) - Patos, PB, Brazil; JOSÉ DÊVEDE DA SILVA, Universidade Federal de Campina Grande (UFCG) - Patos, PB, Brazil; MAÍRA PORTO VIANA, Universidade Federal de Campina Grande (UFCG) - Patos, PB, Brazil; ANA MILENA CÉZAR LIMA, Universidade Federal do Piauí (UFPI) - Teresina, PI, Brazil; PATRICIA YOSHIDA FACCIOLI-MARTINS, CNPC; RAYMUNDO RIZALDO PINHEIRO, CNPC; FRANCISCO SELMO FERNANDES ALVES, CNPC; SÉRGIO SANTOS DE AZEVEDO, Universidade Federal de Campina Grande (UFCG) - Patos, PB, Brazil; CLEBERT JOSÉ ALVES, Universidade Federal de Campina Grande (UFCG) - Patos, PB, Brazil. |
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Título: |
Factors associated with the seroprevalence of caseous lymphadenitis in sheep from Northeastern Brazil. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Preventive Veterinary Medicine, v. 182, e105098, Sept. 2020. |
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DOI: |
https://doi.org/10.1016/j.prevetmed.2020.105098 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Caseous lymphadenitis (CL) is one of the main infectious diseases in sheep, responsible for great economic losses, mainly in Northeast region of Brazil, which has the largest sheep flock in the country. Thus, the aim of this survey was to determine the factors associated with the seroprevalence of this disease in sheep from Northeastern Brazil using a planned sample of flocks and animals. Samples were collected from 2312 adult and young sheep of both sex from 196 farms, located in 51 municipalities in five Northeastern Brazilian states (Ceará, Paraíba, Piauí, Rio Grande do Norte, and Sergipe). Serological diagnosis was performed using the indirect ELISA technique. Factors associated with seropositivity were identified by variables extracted from epidemiological questionnaires administered to breeders, using univariable and multivariable analyses. Factors associated with prevalence were purebred sheep (Prevalence ratio - PR = 1.189; P = 0.017), ram acquisition from animal expositions (PR = 1.192; P = 0.020), offspring is separated from ewes (PR = 1.132; P = 0.048), water supplied to sheep from ponds (PR = 1.365; P = 0.002), and delayed disposal of infected animals (PR = 1.263; P = 0.027). Flock-level and animal-level prevalences were 93.88 % (95 % CI = 89.60?96.46%) and 37.46 % (95 % CI = 35.51?39.45%), respectively. In view of the high prevalence found here and based on the associated factors, the implementation of an efficient CL control programme in Northeastern Brazil is recommended. MenosAbstract: Caseous lymphadenitis (CL) is one of the main infectious diseases in sheep, responsible for great economic losses, mainly in Northeast region of Brazil, which has the largest sheep flock in the country. Thus, the aim of this survey was to determine the factors associated with the seroprevalence of this disease in sheep from Northeastern Brazil using a planned sample of flocks and animals. Samples were collected from 2312 adult and young sheep of both sex from 196 farms, located in 51 municipalities in five Northeastern Brazilian states (Ceará, Paraíba, Piauí, Rio Grande do Norte, and Sergipe). Serological diagnosis was performed using the indirect ELISA technique. Factors associated with seropositivity were identified by variables extracted from epidemiological questionnaires administered to breeders, using univariable and multivariable analyses. Factors associated with prevalence were purebred sheep (Prevalence ratio - PR = 1.189; P = 0.017), ram acquisition from animal expositions (PR = 1.192; P = 0.020), offspring is separated from ewes (PR = 1.132; P = 0.048), water supplied to sheep from ponds (PR = 1.365; P = 0.002), and delayed disposal of infected animals (PR = 1.263; P = 0.027). Flock-level and animal-level prevalences were 93.88 % (95 % CI = 89.60?96.46%) and 37.46 % (95 % CI = 35.51?39.45%), respectively. In view of the high prevalence found here and based on the associated factors, the implementation of an efficient CL control programme in Northeastern ... Mostrar Tudo |
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Palavras-Chave: |
Bacterial pathogens; High prevalence; Indirect ELISA; Northeastern Brazil; Soroprevalência. |
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Thesagro: |
Bactéria; Corynebacterium Pseudotuberculosis; Doença Animal; Linfadenite Caseosa; Ovino. |
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Thesaurus NAL: |
Bacterial infections; Epidemiology; Mycobacterial diseases; Sheep diseases. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 02769naa a2200409 a 4500
001 2124991
005 2020-12-01
008 2020 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.prevetmed.2020.105098$2DOI
100 1 $aALVES, J. R. A.
245 $aFactors associated with the seroprevalence of caseous lymphadenitis in sheep from Northeastern Brazil.$h[electronic resource]
260 $c2020
520 $aAbstract: Caseous lymphadenitis (CL) is one of the main infectious diseases in sheep, responsible for great economic losses, mainly in Northeast region of Brazil, which has the largest sheep flock in the country. Thus, the aim of this survey was to determine the factors associated with the seroprevalence of this disease in sheep from Northeastern Brazil using a planned sample of flocks and animals. Samples were collected from 2312 adult and young sheep of both sex from 196 farms, located in 51 municipalities in five Northeastern Brazilian states (Ceará, Paraíba, Piauí, Rio Grande do Norte, and Sergipe). Serological diagnosis was performed using the indirect ELISA technique. Factors associated with seropositivity were identified by variables extracted from epidemiological questionnaires administered to breeders, using univariable and multivariable analyses. Factors associated with prevalence were purebred sheep (Prevalence ratio - PR = 1.189; P = 0.017), ram acquisition from animal expositions (PR = 1.192; P = 0.020), offspring is separated from ewes (PR = 1.132; P = 0.048), water supplied to sheep from ponds (PR = 1.365; P = 0.002), and delayed disposal of infected animals (PR = 1.263; P = 0.027). Flock-level and animal-level prevalences were 93.88 % (95 % CI = 89.60?96.46%) and 37.46 % (95 % CI = 35.51?39.45%), respectively. In view of the high prevalence found here and based on the associated factors, the implementation of an efficient CL control programme in Northeastern Brazil is recommended.
650 $aBacterial infections
650 $aEpidemiology
650 $aMycobacterial diseases
650 $aSheep diseases
650 $aBactéria
650 $aCorynebacterium Pseudotuberculosis
650 $aDoença Animal
650 $aLinfadenite Caseosa
650 $aOvino
653 $aBacterial pathogens
653 $aHigh prevalence
653 $aIndirect ELISA
653 $aNortheastern Brazil
653 $aSoroprevalência
700 1 $aFARIAS, A. E. M. de
700 1 $aSILVA, J. D. da
700 1 $aVIANA, M. P.
700 1 $aLIMA, A. M. C.
700 1 $aFACCIOLI-MARTINS, P. Y.
700 1 $aPINHEIRO, R. R.
700 1 $aALVES, F. S. F.
700 1 $aAZEVEDO, S. S. de
700 1 $aALVES, C. J.
773 $tPreventive Veterinary Medicine$gv. 182, e105098, Sept. 2020.
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