摘要:
The present invention is directed to variant squalene synthase enzymes, including Saccharomyces cerevisiae squalene synthase enzymes, and to nucleic acid molecules encoding these variant enzymes. These variant enzymes produce squalene at a lower rate than the wild-type enzyme, allowing more farnesyl pyrophosphate to be utilized for production of isoprenoid compounds, while still producing sufficient squalene to allow the S. cerevisiae cells to grow without the requirement for supplementation by sterols such as ergosterol. These variant enzymes, therefore, are highly suitable for the efficient production of isoprenoids.
摘要:
This invention provides novel enzyme compositions using newly identified and isolated C. lucknowense enzymes, including CBH Ib CBH IIb, EG II, EG VI, β-glucosidase, and xylanase II in conjunction with previously identified enzymes CBH Ia, CBH IIa (previously described as Endo 43), and EG V. These enzyme compositions demonstrate an extremely high ability to convert lignocellulosic biomass (e.g., Avicel, cotton, Douglas fir wood pretreated by organosolv) to glucose. CBH Ia and IIb, which both have a cellulose-binding module (CBM) displayed a pronounced synergism with three major endoglucanases (EG II, EG V, EG VI) from the same fungus in hydrolysis of cotton as well as a strong synergy with each other. The enzyme compositions are effective in hydrolysis of the lignocellulosic biomass.
摘要:
A computer-based method and apparatus for the analysis specification and support of work processes. The system is designed to support multiple interdependent decisions, at least some of which require collaboration among multiple participants (116). Work processes are modeled using an application framework (99) used to develop abstract, decision (100) process models. The decision (100) process models are used as a pattern to instantiate concrete process models that incorporate the work defined by the abstract process. The process model is then used to instantiate project models that incorporate the required work from the process. The project models are used to direct and guide the behavior of the participants (116) in the work process.
摘要:
This invention provides novel enzyme compositions using newly identified and isolated C. lucknowense enzymes, including CBH Ib CBH IIb, EG II, EG VI, β-glucosidase, and xylanase II in conjunction with previously identified enzymes CBH Ia, CBH IIa (previously described as Endo 43), and EG V. These enzyme compositions demonstrate an extremely high ability to convert lignocellulosic biomass (e.g., Avicel, cotton, Douglas fir wood pretreated by organosolv) to glucose. CBH Ia and IIb, which both have a cellulose-binding module (CBM) displayed a pronounced synergism with three major endoglucanases (EG II, EG V, EG VI) from the same fungus in hydrolysis of cotton as well as a strong synergy with each other. The enzyme compositions are effective in hydrolysis of the lignocellulosic biomass.
摘要:
The present invention relates to a method and materials for producing glucosamine by fermentation of a genetically modified microorganism. Included in the present invention are genetically modified microorganisms useful in the present method for producing glucsamine, as well as recombinant nucleic acid molecules and the proteins produces by such recombinant nucleic acid molecules.
摘要:
The subject invention relates to novel compositions of neutral and/or alkaline cellulase and methods for obtaining neutral and/or alkaline cellulase compositions from Chrysosporium cultures, in particular Chrysosporium lucknowense. This invention also provides mutants and methods of generating mutants of Chrysosporium capable of producing neutral and/or alkaline cellulose. This invention also relates to the genes encoding the enzymes comprising the neutral and/or alkaline cellulase composition. In addition, this invention provides methods of culturing Chrysosporium to produce neutral and/or alkaline cellulases. The neutral and/or alkaline cellulase compositions of the subject invention can be used in a variety of processes including stone washing of clothing, detergent processes, deinking and biobleaching of paper & pulp and treatment of waste streams.
摘要:
This invention provides novel enzyme compositions using newly identified and isolated C. lucknowense enzymes, including CBH Ib CBH IIb, EG II, EG VI, β-glucosidase, and xylanase II in conjunction with previously identified enzymes CBH Ia, CBH IIa (previously described as Endo 43), and EG V. These enzyme compositions demonstrate an extremely high ability to convert lignocellulosic biomass (e.g., Avicel, cotton, Douglas fir wood pretreated by organosolv) to glucose. CBH Ia and IIb, which both have a cellulose-binding module (CBM) displayed a pronounced synergism with three major endoglucanases (EG II, EG V, EG VI) from the same fungus in hydrolysis of cotton as well as a strong synergy with each other. The enzyme compositions are effective in hydrolysis of the lignocellulosic biomass.
摘要:
Provided are modified valencene synthase polypeptides and methods of using the modified valencene synthase polypeptides. Also provided are methods for producing modified terpene synthases.
摘要:
Engineered DNA encoding 3-phosphoglycerate dehydrogenase (PGD) has reduced sensitivity to inhibition by serine in comparison to wild-type PGD. The DNA encodes PGD which has at least some level of enzymatic activity useful for biosynthesis, and which retains that activity at higher serine levels than does the (unmodified) wild-type PGD. The PGD has the amino acid sequence of this above-described engineered DNA. Expression vectors contain this engineered DNA and regulatory DNA positioned and oriented for expression of the engineered DNA in a host expression system. Cells contain these expression vectors, and a method for producing serine or a serine-derived product includes culturing such cells.
摘要:
Engineered DNA encoding 3-phosphoglycerate dehydrogenate (PGD) has reduced sensitivity to inhibition by serine in comparison to wild-type PGD. The DNA encodes PGD which has at least some level of enzymatic activity useful for biosynthesis, and which retains that activity at higher serine levels than does the (unmodified) wild-type PGD. The PGD has the amino acid sequence of this above-described engineered DNA. Expression vectors contain this engineered DNA and regulatory DNA positioned and oriented for expression of the engineered DNA in a host expression system. Cells contain these expression vectors, and a method for producing serine or a serine-derived product includes culturing such cells.