Immobilization of thermostable beta-glucosidase variants on acrylic supports for biocatalytic processes in hot water
Khan, Sami LU ; Lindahl, Sofia LU ; Turner, Charlotta LU and Nordberg Karlsson, Eva LU
(2012)
In Journal of Molecular Catalysis B: Enzymatic
80.
p.28-38
- Abstract
- Two variants of the thermostable beta-glucosidase TnBgl1A (wt and N221S/P342L) from Thermotoga neapolitana were immobilized on acrylic supports (Eupergit (R) C, Eupergit (R) C250L, and cryogel) and evaluated at conditions close to the boiling point of water. Thermo-gravimetric analysis showed the supports to be stable <250 degrees C. Both wt and N221S/P342L were covalently bound to oxirane-groups respectively via glutaraldehyde spacers, and for coupling reactions 26 Lys and 20 Ser/Thr were surface-located. Immobilized enzymes were active on all supports in the temperature range 80-95 degrees C, but the observed specific activity was low (<= 19 U mg(-1)) using the cryogel. More than 91% of the initial activity was maintained after ten... (More)
- Two variants of the thermostable beta-glucosidase TnBgl1A (wt and N221S/P342L) from Thermotoga neapolitana were immobilized on acrylic supports (Eupergit (R) C, Eupergit (R) C250L, and cryogel) and evaluated at conditions close to the boiling point of water. Thermo-gravimetric analysis showed the supports to be stable <250 degrees C. Both wt and N221S/P342L were covalently bound to oxirane-groups respectively via glutaraldehyde spacers, and for coupling reactions 26 Lys and 20 Ser/Thr were surface-located. Immobilized enzymes were active on all supports in the temperature range 80-95 degrees C, but the observed specific activity was low (<= 19 U mg(-1)) using the cryogel. More than 91% of the initial activity was maintained after ten times recycling, and the same was recovered after 3 months storage at 4 degrees C for Eupergit (R) supports by simply incubating the preparation with bovine serum albumin. No storage loss was detectable on cryogels. The glutaraldehyde spacer improved activity on cryogels, but not on Eupergie supports. Immobilization on Eupergit (R) C250L yielded the highest observed specific activity (254 U mg(-1) for N221S/P342L) in a procedure including blocking of free oxirane-groups by BSA. This biocatalyst was used for on-line hydrolysis of quercetin-glucosides in a yellow onion extract at 80 degrees C, proving the immobilized biocatalyst to be promising in on-line systems for extraction and hydrolysis using hot pressurized water. (C) 2012 Elsevier B.V. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3001359
- author
- Khan, Sami
LU
; Lindahl, Sofia
LU
; Turner, Charlotta
LU
and Nordberg Karlsson, Eva
LU
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Immobilization, Glycoside hydrolase family 1, Eupergit (R) C, Eupergit, (R) C250L, Cryogel
- in
- Journal of Molecular Catalysis B: Enzymatic
- volume
- 80
- pages
- 28 - 38
- publisher
- Elsevier
- external identifiers
-
- wos:000305866100005
- scopus:84860831353
- ISSN
- 1873-3158
- DOI
- 10.1016/j.molcatb.2012.01.004
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Organic chemistry (S/LTH) (011001240), Biotechnology (LTH) (011001037)
- id
- 58a9c0eb-33d5-48f5-9cfd-e9da0dbca7ec (old id 3001359)
- date added to LUP
- 2016-04-01 09:53:01
- date last changed
- 2022-01-25 17:35:58
@article{58a9c0eb-33d5-48f5-9cfd-e9da0dbca7ec,
abstract = {{Two variants of the thermostable beta-glucosidase TnBgl1A (wt and N221S/P342L) from Thermotoga neapolitana were immobilized on acrylic supports (Eupergit (R) C, Eupergit (R) C250L, and cryogel) and evaluated at conditions close to the boiling point of water. Thermo-gravimetric analysis showed the supports to be stable <250 degrees C. Both wt and N221S/P342L were covalently bound to oxirane-groups respectively via glutaraldehyde spacers, and for coupling reactions 26 Lys and 20 Ser/Thr were surface-located. Immobilized enzymes were active on all supports in the temperature range 80-95 degrees C, but the observed specific activity was low (<= 19 U mg(-1)) using the cryogel. More than 91% of the initial activity was maintained after ten times recycling, and the same was recovered after 3 months storage at 4 degrees C for Eupergit (R) supports by simply incubating the preparation with bovine serum albumin. No storage loss was detectable on cryogels. The glutaraldehyde spacer improved activity on cryogels, but not on Eupergie supports. Immobilization on Eupergit (R) C250L yielded the highest observed specific activity (254 U mg(-1) for N221S/P342L) in a procedure including blocking of free oxirane-groups by BSA. This biocatalyst was used for on-line hydrolysis of quercetin-glucosides in a yellow onion extract at 80 degrees C, proving the immobilized biocatalyst to be promising in on-line systems for extraction and hydrolysis using hot pressurized water. (C) 2012 Elsevier B.V. All rights reserved.}},
author = {{Khan, Sami and Lindahl, Sofia and Turner, Charlotta and Nordberg Karlsson, Eva}},
issn = {{1873-3158}},
keywords = {{Immobilization; Glycoside hydrolase family 1; Eupergit (R) C; Eupergit; (R) C250L; Cryogel}},
language = {{eng}},
pages = {{28--38}},
publisher = {{Elsevier}},
series = {{Journal of Molecular Catalysis B: Enzymatic}},
title = {{Immobilization of thermostable beta-glucosidase variants on acrylic supports for biocatalytic processes in hot water}},
url = {{http://dx.doi.org/10.1016/j.molcatb.2012.01.004}},
doi = {{10.1016/j.molcatb.2012.01.004}},
volume = {{80}},
year = {{2012}},
}