Chemistry: molecular biology and microbiology – Enzyme – proenzyme; compositions thereof; process for... – Oxidoreductase
Reexamination Certificate
2007-08-14
2007-08-14
Achutamurthy, P. (Department: 1652)
Chemistry: molecular biology and microbiology
Enzyme , proenzyme; compositions thereof; process for...
Oxidoreductase
C435S440000, C435S004000, C435S006120, C435S025000, C435S252300, C435S320100, C435S069100, C435S071100, C536S023200, C536S023700
Reexamination Certificate
active
09332886
ABSTRACT:
Mutants of 2,5-diketo-D-gluconic acid reductase A, an enzyme used to produce 2-keto-L-gulonic acid, a precursor of ascorbic acid (vitamin C) are prepared by site-directed mutagenesis. These mutants have increased catalytic activity, increased expression levels, and/or enhanced temperature stability.
REFERENCES:
patent: 3959076 (1976-05-01), Sonoyama et al.
patent: 3998697 (1976-12-01), Sonoyama et al.
patent: RE30872 (1982-02-01), Sonoyama et al.
patent: 4543331 (1985-09-01), Sonoyama et al.
patent: 4757012 (1988-07-01), Estell et al.
patent: 4758514 (1988-07-01), Light et al.
patent: 4945052 (1990-07-01), Hardy et al.
patent: 5004690 (1991-04-01), Light et al.
patent: 5008192 (1991-04-01), Anderson et al.
patent: 5032514 (1991-07-01), Anderson et al.
patent: 5376544 (1994-12-01), Lazarus et al.
patent: 5583025 (1996-12-01), Lazarus et al.
patent: 5795761 (1998-08-01), Powers et al.
patent: 046284 (1981-08-01), None
patent: 088409 (1983-03-01), None
patent: 142169 (1984-11-01), None
Anderson S. et al., “Production of 2-Keto-L-Gulonate, an Intermediate in L-Ascorbate Synthesis, by a Genetically ModifiedErwinia herbicola”, Science130:144-149 (1985).
Grindley, J.F., et al., “Conversion of Glucose to 2-Keto-L-Gulonate, an Intermediate in L-Ascorbate Synthesis by a Recominant Strain ofErwinia herbicola”, Appl. Environ. Microbiol.54:1170-1775 (1988).
Kellis, J.T., et al., “Contribution of Hydrophobic Interactions to Protein Stability”,Nature333:784-786 (1988).
Imanaka T., et al., “A New Way of Enhancing the Thermostability of Proteases”,Nature324:695-697 (1986).
Matthews, B.W., et al., “Enhanced Protein Thermostability from Site-Directed Mutations that Decreases the Entropy of Unfolding”,Proc. Natl. Acad. Sci.(USA) 84:6663-6667 (1987).
Matsumura, M., et al., “Substantial Increase of Protein Stability by Multiple Disulphide Bonds”,Nature342:291-293 (1989).
Miller et al., “Purification and Characterization of 2,5-Diketo-D-Gulonate Reductase fromCorynebacteriumSp.”,J. Biol. Chem.262:9016-9020 (1987).
Nicholson, et al., “Enhanced Protein Thermostability from Designed Mutations that Interact with α-Helices”,Science240:1648-1652 (1988).
Rastetter, et al., “Enzyme Engineering:Applications and Promise”,Trends Biotechnol.1:80-84 (1983).
Richardson et al., “Amino Acid Preferences for Specific Locations at the Ends of α-Helices”,Science240:11648-1652 (19880.
Sonoyama et al., “Purification and properties of Two 2,5 Diketo-D-Gluconate Reductases from a Mutant Strain Derived fromCorynebacteriumsp.”,J. Ferment. Technol.65:311-317 (1987).
Sonoyama et al., “Distribution of Microorganisms Capable of Reducing 2,5 Diketo-D-Gluconate to 2-Keto-L-Gulonate”,Agric. Biol. Chem.51:2003-2004 (1987).
Sonoyama et al., “Production of 2-Keto-L-Gulonic Acid from D-Glucose by Two Stage Fermentation”,Appl. Environ. Microbiol.43:1064-1069 (1982).
Wells et al., “Recruitment of Substrate-Specificity Properties from One Enzyme into a Related One by Protein Engineering”,Proc. Nat;. Acad. Sci. USA84:5167-5161 (1987).
Wilkinson et al., “A Large Increase in Enzyme-Substrate Affinity by Protein Engineering”,Nature307:187-188 (1984).
Anderson Stephen
Hurle Mark
Lazarus Robert A.
Powers David B.
Achutamurthy P.
Licata & Tyrrell P.C.
Pak Yong D.
Rutgers, the State University of New Jersey
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