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Enabling multi-enzyme biocatalysis using coaxial-electrospun hollow nanofibers: redesign of artificial cells
Alternative TitleJ. Mat. Chem. B
Ji, Xiaoyuan1,2; Wang, Ping1,3,4; Su, Zhiguo1; Ma, Guanghui1; Zhang, Songping1,5
2014
Source PublicationJOURNAL OF MATERIALS CHEMISTRY B
ISSN2050-750X
Volume2Issue:2Pages:181-190
AbstractHighly efficient immobilization of multi-enzyme systems involving cofactor regeneration represents one of the greatest challenges in bioprocessing. Particulate artificial cells with enzymes and cofactors encapsulated within microcapsules have long been the major type of multi-enzyme biocatalysts. In the present work, a novel hollow nanofiber-based artificial cell that performs multi-step reactions involving efficient coenzyme regeneration was fabricated in situ by a facile co-axial electrospinning process. To that end, a mixture of glycerol and water containing the dissolved multi-enzyme system for the bile acid assay, which included 3 alpha-hydroxysteroid dehydrogenase (3 alpha-HSD), diaphorase (DP) and NADH was fed as the core phase solution, and a N, N-dimethylacetylamide solution of 30 wt% polyurethane was fed as the shell phase solution during the co-axial electrospinning. The relationship between the structures of the hollow nanofibers and the activity and stability of the encapsulated enzymes was studied. At core and shell phase electrospinning solution flow rates of 0.07 and 0.5 mL h(-1), activity recoveries as high as 76% and 82% were obtained for the encapsulated 3a-HSD and DP. The hollow nanofiber-based artificial cells were successfully used for the bile acid assay, yielding good linearity for bile acid concentrations ranging from 0-200 mu M. Compared with the solution-based multi-enzyme system, the hollow nanofiber-based multi-enzyme system presented a lumped activity recovery of 75%. In addition, the hollow nanofiber provided the multi-enzyme system confined inside the nano-domain of the hollow fibers with a unique stabilizing mechanism, such that more than a 170-fold increase in half-life at 25 degrees C was obtained for the encapsulated 3a-HSD and DP. This study is expected to greatly promote and broaden the application of multi-enzyme systems in industry, biosensor, biomedical, and many other related research fields.; Highly efficient immobilization of multi-enzyme systems involving cofactor regeneration represents one of the greatest challenges in bioprocessing. Particulate artificial cells with enzymes and cofactors encapsulated within microcapsules have long been the major type of multi-enzyme biocatalysts. In the present work, a novel hollow nanofiber-based artificial cell that performs multi-step reactions involving efficient coenzyme regeneration was fabricated in situ by a facile co-axial electrospinning process. To that end, a mixture of glycerol and water containing the dissolved multi-enzyme system for the bile acid assay, which included 3 alpha-hydroxysteroid dehydrogenase (3 alpha-HSD), diaphorase (DP) and NADH was fed as the core phase solution, and a N, N-dimethylacetylamide solution of 30 wt% polyurethane was fed as the shell phase solution during the co-axial electrospinning. The relationship between the structures of the hollow nanofibers and the activity and stability of the encapsulated enzymes was studied. At core and shell phase electrospinning solution flow rates of 0.07 and 0.5 mL h(-1), activity recoveries as high as 76% and 82% were obtained for the encapsulated 3a-HSD and DP. The hollow nanofiber-based artificial cells were successfully used for the bile acid assay, yielding good linearity for bile acid concentrations ranging from 0-200 mu M. Compared with the solution-based multi-enzyme system, the hollow nanofiber-based multi-enzyme system presented a lumped activity recovery of 75%. In addition, the hollow nanofiber provided the multi-enzyme system confined inside the nano-domain of the hollow fibers with a unique stabilizing mechanism, such that more than a 170-fold increase in half-life at 25 degrees C was obtained for the encapsulated 3a-HSD and DP. This study is expected to greatly promote and broaden the application of multi-enzyme systems in industry, biosensor, biomedical, and many other related research fields.
KeywordSemipermeable Microcapsules Polymer Nanofibers Enzymes Systems Glycerol Immobilization Vesicles Supports
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1039/c3tb21232g
URL查看原文
Indexed BySCI
Language英语
WOS KeywordSEMIPERMEABLE MICROCAPSULES ; POLYMER NANOFIBERS ; ENZYMES ; SYSTEMS ; GLYCEROL ; IMMOBILIZATION ; VESICLES ; SUPPORTS
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Biomaterials
WOS IDWOS:000327849200004
Citation statistics
Cited Times:41[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8089
Collection研究所(批量导入)
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Minnesota, Dept Bioprod & Biosyst Engn, St Paul, MN 55108 USA
4.Univ Minnesota, Inst Biotechnol, St Paul, MN 55108 USA
5.Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
Recommended Citation
GB/T 7714
Ji, Xiaoyuan,Wang, Ping,Su, Zhiguo,et al. Enabling multi-enzyme biocatalysis using coaxial-electrospun hollow nanofibers: redesign of artificial cells[J]. JOURNAL OF MATERIALS CHEMISTRY B,2014,2(2):181-190.
APA Ji, Xiaoyuan,Wang, Ping,Su, Zhiguo,Ma, Guanghui,&Zhang, Songping.(2014).Enabling multi-enzyme biocatalysis using coaxial-electrospun hollow nanofibers: redesign of artificial cells.JOURNAL OF MATERIALS CHEMISTRY B,2(2),181-190.
MLA Ji, Xiaoyuan,et al."Enabling multi-enzyme biocatalysis using coaxial-electrospun hollow nanofibers: redesign of artificial cells".JOURNAL OF MATERIALS CHEMISTRY B 2.2(2014):181-190.
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