Guest post by Jian-He Xu, Editor-in-Chief of Bioresources and Bioprocessing
Multicopper oxidase (MCO) is a promising enzyme of laccase family for detection of oxidation, which may function as a biosensor and be applied in bioremediation. In biology, MCOs are enzymes which oxidise their substrate by accepting electrons at a mononuclear copper centre and transferring them to a trinuclear copper centre; dioxygen binds to the trinuclear centre and, following the transfer of four electrons, is reduced to two molecules of water. Through genetic and enzymatic engineering, a new MCO from Proteus hauseri was successfully over-expressed in E. coli.
This MCO has a great potential for GOLD (Au) adsorption, as much as 38% (w/w), which is almost 10-fold higher than other proteins. By zeta-potential analysis, the recombinant MCO is anionic and the Au adsorption on the protein is through electrostatic interactions (Fig. 1). This is the first attempt to explore the ability of MCO to adsorb Au, which may become a novel application for biorecovery of gold in the industry (Fig. 2).
Fig. 1 MCO application in gold adsorption (left) and zeta potential analysis (right)
Fig. 2 Prospective of MCO for biorecovery of gold in different industries.
The original article can be found here.
About the journal
Bioresources and Bioprocessing (BRBP) is a peer-reviewed open access journal published under the brand SpringerOpen. At present the article-processing cost was fully covered by the State Key Laboratory of Bioreactor Engineeering.
The journal aims at providing an international academic platform for exchanging views on and promoting research to support bioresource development, processing and utilization in a sustainable manner. As an application-oriented research journal, BRBP covers not only the application and management of bioresource technology but also the design and development of bioprocesses that will lead to new and sustainable production.
BRBP publishes the following article types: Research Articles, Reviews, Short Reports.