A Model of Photoinhibition Related to mRNA Instability in Ethylene Production by a Recombinant Cyanobacterium
✍ Scribed by JIN-SHENG WANG; TETSUYA ARAKI; MASAYOSHI MATSUOKA; TAKAHIRA OGAWA
- Book ID
- 102611293
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 135 KB
- Volume
- 202
- Category
- Article
- ISSN
- 0022-5193
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✦ Synopsis
Photoinhibition mechanism is studied for ethylene production by a recombinant cyanobacterium. The kinetic pattern of the production is similar to that of substrate inhibition in enzyme reactions, whereas the photoinhibition is believed not to be substrate-related, but to originate from the enzyme for ethylene formation. In a proposed model, the inhibition is attributed to the process of enzyme synthesis, where light-dependent mRNA decomposition a!ects enzyme concentration. A mathematical formula derived accordingly for light dependence of ethylene production rate gives the same form as a well-known equation of substrate inhibition. The model also predicts ethylene production under dark condition, which has been observed experimentally.