Download MendeleyEnzyme repurposing of a hydrolase as an emergent peroxidase upon metal binding.
Fujieda, N., Schatti, J., Stuttfeld, E., Ohkubo, K., Maier, T., Fukuzumi, S., Ward, T.R.(2015) Chem Sci 6: 4060-4065
- PubMed: 29218172
- DOI: https://doi.org/10.1039/c5sc01065a
- Primary Citation of Related Structures:
4TM7, 4TM8 - PubMed Abstract:
As an alternative to Darwinian evolution relying on catalytic promiscuity, a protein may acquire auxiliary function upon metal binding, thus providing it with a novel catalytic machinery. Here we show that addition of cupric ions to a 6-phosphogluconolactonase 6-PGLac bearing a putative metal binding site leads to the emergence of peroxidase activity ( k cat 7.8 × 10 -2 s -1 , K M 1.1 × 10 -5 M). Both X-ray crystallographic and EPR data of the copper-loaded enzyme Cu·6-PGLac reveal a bis-histidine coordination site, located within a shallow binding pocket capable of accommodating the o -dianisidine substrate.
Organizational Affiliation:
Department of Chemistry , University of Basel , Spitalstrasse 51 , CH-4056 Basel , Switzerland . Email: fujieda@mls.eng.osaka-u.ac.jp ; Email: thomas.ward@unibas.ch.
