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Hydrogen production...
Hydrogen production by a fully de novo enzyme
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- Berglund, Sigrid (author)
- Uppsala universitet,Fysikalisk kemi
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- Bassy, Clara (author)
- Uppsala universitet,Institutionen för farmaceutisk biovetenskap,Fysikalisk kemi
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- Kaya, Ibrahim (author)
- Uppsala universitet,Institutionen för farmaceutisk biovetenskap
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- Andrén, Per E., Professor, 1957- (author)
- Uppsala universitet,MMS, medicinsk masspektrometri,Institutionen för läkemedelskemi,Science for Life Laboratory, SciLifeLab
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- Shtender, Vitalii (author)
- Uppsala universitet,Oorganisk kemi,Tillämpad materialvetenskap
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- Lasagna, Mauricio (author)
- Department of Biochemistry and Biphysics, Texas A&M University
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- Tommos, Cecilia (author)
- Department of Biochemistry and Biphysics, Texas A&M University
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- Magnuson, Ann (author)
- Uppsala universitet,Fysikalisk-kemiska institutionen,Molekylär biomimetik,Kemisk fysik
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- Glover, Starla (author)
- Uppsala universitet,Fysikalisk kemi
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(creator_code:org_t)
- 2024
- English.
- Related links:
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https://urn.kb.se/re...
Abstract
Subject headings
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- Molecular catalysts based on abundant elements that function in neutral water represent an essential component of sustainable hydrogen production. Artificial hydrogenases based on protein-inorganic hybrids have emerged as an intriguing class of catalysts for this purpose. We have prepared a novel artificial hydrogenase based on cobaloxime bound to a de novo three alpha-helical protein, α3C, via a pyridyl-based unnatural amino acid. The functionalized de novo protein was characterised by UV-visible, CD, and EPR spectroscopy, as well as MALDI spectrometry, which confirmed the presence and ligation of cobaloxime to the protein. The new de novo protein produced hydrogen under electrochemical, photochemical and reductive chemical conditions in neutral water solution. A change in hydrogen evolution capability of the de novo enzyme compared with native cobaloxime was observed, with turnover numbers around 80% of that of cobaloxime, and hydrogen evolution rates of 40% of that of cobaloxime. We discuss these findings in the context of existing literature, how our study contributes important information about the functionality of cobaloxime as hydrogen evolving catalysts in protein environments, and the feasibility of using de novo proteins for developent into artificial metalloenzymes. Small de novo proteins as enzyme scaffolds have the potential to function as upscalable bioinspired catalysts thanks to their efficient atom economy, and the findings presented here show that these types of novel enzymes are a possible product.
Subject headings
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
Publication and Content Type
- vet (subject category)
- ovr (subject category)
To the university's database
- By the author/editor
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Berglund, Sigrid
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Bassy, Clara
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Kaya, Ibrahim
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Andrén, Per E., ...
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Shtender, Vitali ...
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Lasagna, Maurici ...
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show more...
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Tommos, Cecilia
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Magnuson, Ann
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Glover, Starla
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Chemical Science ...
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and Other Chemistry ...
- By the university
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Uppsala University