Linked Life Data

20630484

Source:http://linkedlifedata.com/resource/pubmed/id/20630484

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2010-10-11
pubmed:abstractText
Nanotechnology-inspired biocatalyst systems have attracted a lot of attention in enzyme immobilization recently. Theoretically, nanomaterials are ideal supporting materials because they can provide the upper limits on enzyme-efficiency-determining factors such as surface area/volume ratio, enzyme loading capacity and mass transfer resistance. However, common immobilization methods have limited the applicability of these biocatalysts owing to enzyme leaching, 3D structure loss, and strong diffusion resistance. Expensive enzyme purification step is also required for these methods before immobilization. In this work, we show an efficient immobilization method based on specific interaction between His-tagged NADH oxidase and functionalized single-walled carbon nanotubes without requiring enzyme purification for immobilization. We cloned the annotated NADH oxidase gene from Bacillus cereus genome and overexpressed with pET30 vector encoding N-terminal 6× His-tag. The His-tagged NADH oxidase was then immobilized onto single-walled carbon nanotubes functionalized with N(?),N(?)-bis(carboxymethyl)-L-lysine hydrate. The resulting nanoscale biocatalyst has overcome the foresaid limitations, and demonstrates good loading capacity and stability while maintaining 92% maximum activity of the native enzyme. We further demonstrate that the immobilization is reversible and can retain ca. 92% activity for a couple of loading cycles.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
1873-4863
pubmed:author
pubmed:copyrightInfo
Copyright © 2010 Elsevier B.V. All rights reserved.
pubmed:issnType
Electronic
pubmed:day
1
pubmed:volume
150
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
57-63
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Specific and reversible immobilization of NADH oxidase on functionalized carbon nanotubes.
pubmed:affiliation
School of Chemical & Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore 637459, Singapore.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't