Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing oxygen-containing organic compound
Reexamination Certificate
2006-11-14
2006-11-14
Saidha, Tekchand (Department: 1652)
Chemistry: molecular biology and microbiology
Micro-organism, tissue cell culture or enzyme using process...
Preparing oxygen-containing organic compound
C435S136000, C435S140000, C435S252300, C435S254200, C435S410000, C435S320100, C536S023200
Reexamination Certificate
active
07135315
ABSTRACT:
The present invention relates to a novel DNA which encodes aldehyde dehydrogenase (SNDH), an expression vector containing the DNA and recombinant organisms containing said DNA. Furthermore, the present invention concerns a process for producing recombinant aldehyde dehydrogenase protein and a process for producing L-ascorbic acid (vitamin C) and/or 2-keto-L-gulonic acid (2-KGA) from L-sorbosone by using the recombinant aldehyde dehydrogenase protein or recombinant organisms containing the expression vector. Also provided is a process for the production of 2KGA with a microorganism in which the gene encoding said aldehyde dehydrogenase is disrupted.
REFERENCES:
patent: 5437989 (1995-08-01), Asakura et al.
patent: 0 790 301 (1997-08-01), None
patent: 2002-125689 (2002-05-01), None
patent: WO 89/06688 (1989-07-01), None
patent: WO 02/34919 (2002-05-01), None
Miyazaki T. et al. Pyrroloquinoline Ouinone-Dependent Dehydrogenases from Ketogluconicum vulgare Catalyze the Direct Conversion of L-Sorbosone to L-Ascorbic Acid, Applied and Environmental Microbiology, 2006, 72, 1487-1495.
Saito, Y. et al., “Direct Fermentation of 2-Keto-L-Gulonic Acid in Recombinant Gluconobacter oxydans,”Biotechnology and BioEngineering., vol. 58, No. 2&3, pp. 309-315 (1998).
Saito, Y. et al., “Cloning of Genes Coding forL-Sorbose andL-Sorbosone Dehydrogenases from Gluconobacter oxydans and Microbial Production of 2-Keto-L-Gulonate, a Precursor ofL-Ascorbic Acid, in a Recombinant G. oxydans Strain,”Applied and Environmental Microbiology, vol. 63, pp. 454-460 (1997).
Hoshino, T. et al., “Isolation and Characterization of NAD(P)-DependentL-Sorbosone Dehydrogenase from Gluconobacter melanogenus UV10,”Agric. Biol. Chem., vol. 55, No. 3, pp. 665-670 (1991).
Asakura and Hoshino, “Isolation and Characterization of A New Quinoprotein Dehydrogenase,L-Sorbose/L-Sorbosone Dehydrgenase,”Biosci. Biotechnol. Biochem, vol. 63, No. 1, pp. 46-53 (1999).
Hancock and Viola, “Biotechnological approaches forL-ascorbic acid production,”Trends in Biotechnology, vol. 20, No. 7 (2002).
Derwent Database English language abstract of JP 2002-125689 (document B4 above).
Hoshino Tatsuo
Miyazaki Taro
Sugisawa Teruhide
Bryan Cave LLP
DSM IP Assets B.V.
Saidha Tekchand
Walicka Malgorzata A.
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