title: A model of photoinhibition related to mRNA instability in ethylene production by a recombinant cyanobacterium.
abstract: 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 affects 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.
authors.affiliation: Shiga Technology Center, Iwatani International Corporation, Moriyama, 524-0041, Japan.
authors.forename: J S
authors.initials: JS
authors.lastname: Wang
authors.forename: T
authors.initials: T
authors.lastname: Araki
authors.forename: M
authors.initials: M
authors.lastname: Matsuoka
authors.forename: T
authors.initials: T
authors.lastname: Ogawa
mesh_terms: D000818:Animals; D002245:Carbon Dioxide / Q000378:metabolism; D000458:Cyanobacteria / Q000378:metabolism*; D005030:Ethylenes / Q000096:biosynthesis*; D008027:Light; D008190:Lyases / Q000235:genetics; D008954:Models, Biological; D045322:Photosynthetic Reaction Center Complex Proteins / Q000737:chemistry; D012333:RNA, Messenger / Q000378:metabolism*
chemical_list: D005030:Ethylenes; D045322:Photosynthetic Reaction Center Complex Proteins; D012333:RNA, Messenger; D002245:Carbon Dioxide; C036216:ethylene; D008190:Lyases; C034693:ethylene forming enzyme