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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Biochemical characterization, low-resolution SAXS structure and an enzymatic cleavage pattern of BlCel48 from Bacillus licheniformis

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Autor(es):
de Araujo, Evandro Ares [1] ; Manzine, Livia Regina [1] ; Piiadov, Vassili [1] ; Seiki Kadowaki, Marco Antonio [1] ; Polikarpov, Igor [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Inst Fis Sao Carlos, Av Trabalhador Sao Carlense 400, BR-13560970 Sao Carlos, SP - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: International Journal of Biological Macromolecules; v. 111, p. 302-310, MAY 2018.
Citações Web of Science: 1
Resumo

Economic sustainability of modern biochemical technologies for plant cell wall transformations in renewable fuels, green chemicals, and sustainable materials is considerably impacted by the elevated cost of enzymes. Therefore, there is a significant drive toward discovery and characterization of novel carbohydrate-active enzymes. Here, the BICel48 cellulase from Bacillus licheniformis, a glycoside hydrolase family 48 member (GH48), was functionally and biochemically characterized. The enzyme is catalytically stable in a broad range of temperatures and pH conditions with its enzymatic activity at pH 5.0 and 60 degrees C. BlCel48 exhibits high hydrolytic activity against phosphoric acid swollen cellulose (PASC) and bacterial cellulose (BC) and significantly lower activity against carboxymethylcellulose (CMC). BlCel48 releases predominantly cellobiose, and also small amounts of cellotriose and cellotetraose as products from PASC hydrolysis. Small-angle X-ray scattering (SAXS) data analysis revealed a globular molecular shape and monomeric state of the enzyme in solution. Its molecular mass estimated based on SAXS data is similar to 77.2 kDa. BlCel48 has an (alpha alpha)(6)-helix barrel-fold, characteristic of GH48 members. Comparative analyses of homologous sequences and structures reveal the existence of two distinct loops in BlCel48 that were not present in other structurally characterized GH48 enzymes which could have importance for the enzyme activity and specificity. (C) 2017 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 15/13684-0 - Estudos estruturais e funcionais de enzimas que participam na síntese e degradação de carboidratos complexos
Beneficiário:Igor Polikarpov
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 10/52362-5 - Targeted analysis of microbial lignocellulolytic secretomes: a new approach to enzyme discovery
Beneficiário:Igor Polikarpov
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 11/20505-4 - Duas classes importantes de glicosil hidrolases: estudos funcionais e análise estrutural
Beneficiário:Marco Antonio Seiki Kadowaki
Linha de fomento: Bolsas no Brasil - Pós-Doutorado
Processo FAPESP: 14/00769-5 - Estudos estruturais de hidrolases de glicosídeos em solução usando técnicas de espalhamento a baixo ângulo (SAS)
Beneficiário:Vasilii Piiadov
Linha de fomento: Bolsas no Brasil - Doutorado Direto