1. High-Throughput Screening of Catalytic H2 Production.
- Author
-
Koo, Jamin, Schnabel, Tim, Liong, Sylvie, Evitt, Niklaus H., and Swartz, James R.
- Subjects
HYDROGENASE ,FERREDOXINS ,OXIDATION-reduction reaction ,ELECTRONS ,CLOSTRIDIUM pasteurianum - Abstract
Hydrogenases, ferredoxins, and ferredoxin-NADP
+ reductases (FNR) are redox proteins that mediate electron metabolism in vivo, and are also potential components for biological H2 production technologies. A high-throughput H2 production assay device (H2 PAD) is presented that enables simultaneous evaluation of 96 individual H2 production reactions to identify components that improve performance. Using a CCD camera and image analysis software, H2 PAD senses the chemo-optical response of Pd/WO3 thin films to the H2 produced. H2 PAD-enabled discovery of hydrogenase and FNR mutants that enhance biological H2 production is reported. From a library of 10 080 randomly mutated Clostridium pasteurianum [FeFe] hydrogenases, we found a mutant with nearly 3-fold higher H2 production specific activity. From a library of 400 semi-randomly mutated Oryza sativa FNR, the top hit enabled a 60 % increase in NADPH-driven H2 production rates. H2 PAD can also facilitate elucidation of fundamental biochemical mechanisms within these systems. [ABSTRACT FROM AUTHOR]- Published
- 2017
- Full Text
- View/download PDF