Artículo
Insights into the xylan degradation system of Cellulomonas sp. B6: biochemical characterization of rCsXyn10A and rCsAbf62A
Garrido, Mercedes María
; Piccinni, Florencia Elizabeth
; Landoni, Malena
; Peña, Maria; Topalian, Juliana
; Couto, Alicia Susana
; Wirth, Sonia Alejandra
; Urbanowicz, Breeanna; Campos, Eleonora
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Fecha de publicación:
07/2022
Editorial:
Springer
Revista:
Applied Microbiology and Biotechnology
ISSN:
0175-7598
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Valorization of the hemicellulose fraction of plant biomass is crucial for the sustainability of lignocellulosic biorefneries. The Cellulomonas genus comprises Gram-positive Actinobacteria that degrade cellulose and other polysaccharides by secreting a complex array of enzymes. In this work, we studied the specifcity and synergy of two enzymes, CsXyn10A and CsAbf62A, which were identifed as highly abundant in the extracellular proteome of Cellulomonas sp. B6 when grown on wheat bran. To explore their potential for bioprocessing, the recombinant enzymes were expressed and their activities were thoroughly characterized. rCsXyn10A is a GH10 endo-xylanase (EC 3.2.1.8), active across a broad pH range (5 to 9), at temperatures up to 55 °C. rCsAbf62A is an α-l-arabinofuranosidase (ABF) (EC 3.2.1.55) that specifcally removes α-1,2 and α-1,3-l-arabinosyl substituents from arabino-xylo-oligosaccharides (AXOS), xylan, and arabinan backbones, but it cannot act on double-substituted residues. It also has activity on pNPA. No diferences were observed regarding activity when CsAbf62A was expressed with its appended CBM13 module or only the catalytic domain. The amount of xylobiose released from either wheat arabinoxylan or arabino-xylo-oligosaccharides increased signifcantly when rCsXyn10A was supplemented with rCsAbf62A, indicating that the removal of arabinosyl residues by rCsAbf62A improved rCsXyn10A accessibility to β-1,4-xylose linkages, but no synergism was observed in the deconstruction of wheat bran. These results contribute to designing tailor-made, substrate-specifc, enzymatic cocktails for xylan valorization.
Palabras clave:
ARABINOFURANOSIDASES
,
CELLULOMONAS
,
GH10
,
GH62
,
HEMICELLULOSE
,
XYLANASES
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos (IABIMO)
Articulos de INSTITUTO DE AGROBIOTECNOLOGIA Y BIOLOGIA MOLECULAR
Articulos de INSTITUTO DE AGROBIOTECNOLOGIA Y BIOLOGIA MOLECULAR
Articulos(CIHIDECAR)
Articulos de CENTRO DE INVESTIGACIONES EN HIDRATOS DE CARBONO
Articulos de CENTRO DE INVESTIGACIONES EN HIDRATOS DE CARBONO
Articulos(IBBEA)
Articulos de INSTITUTO DE BIODIVERSIDAD Y BIOLOGIA EXPERIMENTAL Y APLICADA
Articulos de INSTITUTO DE BIODIVERSIDAD Y BIOLOGIA EXPERIMENTAL Y APLICADA
Citación
Garrido, Mercedes María; Piccinni, Florencia Elizabeth; Landoni, Malena; Peña, Maria; Topalian, Juliana; et al.; Insights into the xylan degradation system of Cellulomonas sp. B6: biochemical characterization of rCsXyn10A and rCsAbf62A; Springer; Applied Microbiology and Biotechnology; 106; 13-16; 7-2022; 5035-5049
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