Abstract:
Disclosed are processes to identify desired enzymatic activity from a pool of DNA collected from one or more organisms or a DNA subjected to random directed mutagenesis. The methods involve the generation of DNA library in a host cell and screening for the desired activity. The process can be applied to develop thermally stable proteins having improved enzymatic activity at lower temperature.
Abstract:
Recombinant enzyme libraries and kits where a plurality of enzymes are each characterized by different physical and/or chemical characteristics and classified by common characteristics. The characteristics are determined by screening of recombinant enzymes expressed by a DNA library produced from various microorganisms. Also disclosed is a process for identifying clones of a recombinant library which express a protein with a desired activity by screening a library of expression clones randomly produced from DNA of at least one microorganism, said screening being effected on expression products of said clones to thereby identify clones which express a protein with a desired activity. Also disclosed is a process of screening clones having DNA from an uncultivated microorganism for a specified protein activity by screening for a specified protein activity in a library of clones prepared by (i) recovering DNA from a DNA population derived from at least one uncultivated microorganism; and (ii) transforming a host with recovered DNA to produce a library of clones which is screened for the specified protein activity.
Abstract:
Disclosed is a process of performing "Sexual" PCR which includes generating random polynucleotides by interrupting or blocking a synthesis or amplification process to show or halt synthesis or amplification of at least one polynucleotide, optionally amplifying the polynucleotides, and reannealing the polynucleotides to produce random mutant polynucleotides. Also provided are vector and expression vehicles including such mutant polynucleotides, polypeptides expressed by the mutant polynucleotides and a method for producing random mutant polypeptides.
Abstract:
A purified thermostable enzyme is derived from the archael bacterium Thermococcus GU5L5. The enzyme has a molecular weight of about 68.5 kilodaltons and has cellulase activity. The enzyme can be produced from native or recombinant host cells and can be used for the removal of arginine, phenylalanine, or methionine amino acids from the N-terminal end of peptides in peptide or peptidomimetic synthesis. The enzyme is selective for the L, or "natural" enantiomer of the amino acid derivatives and is therefore useful for the production of optically active compounds. These reactions can be performed in the presence of the chemically more reactive ester functionality, a step which is very difficult to achieve with nonenzymatic methods.
Abstract:
The invention provides a purified thermostable enzyme derived from the archael bacterium AEPII1a. The enzyme has a molecular weight of about 60.9 kilodaltons and has cellulase activity (SEQ ID NO:2). The enzyme can be produced from native or recombinant host cells and can be used to aid in the digestion of cellulose where desired. Also included are other endoglucanases having homology to SEQ ID NO:2.
Abstract translation:本发明提供了源自阿尔德细菌AEPII1a的纯化的热稳定酶。 该酶具有约60.9千道尔顿的分子量并具有纤维素酶活性(SEQ ID NO:2)。 该酶可以由天然的或重组的宿主细胞产生,并且可以用于有助于纤维素的消化。 还包括与SEQ ID NO:2具有同源性的其它内切葡聚糖酶。
Abstract:
Esterase enzymes derived from various Staphylothermus, Pyrodictium, Archaeoglobus, Aquifex, M11TL, Thermococcus, Teredinibacter and Sulfolobus organisms are disclosed. The enzymes are produced from native or recombinant host cells and can be utilized in the pharmaceutical, agricultural and other industries.
Abstract:
A thermostable glycosidase enzymes derived from various thermococcus, staphylothermus and pyrococcus organisms is disclosed. The enzymes are produced from native or recombinant host cells and can be utilized in the food processing industry, pharmaceutical industry and in the textile industry, detergent industry and in the baking industry.
Abstract:
Catalase enzymes derived from bacterial for the genera Alcaligenes (Delaya) and MicroscUla are disclosed. The enzymes are produced from native or recombinant host cells and can be utilized to destroy or detect hydrogen peroxide, e.g., in production of glyoxylic acid and in glucose sensors, and in processes where hydrogen peroxide is used as a bleaching or antibacterial agent, e.g., in contact lens cleaning, in bleaching steps in pulp and paper preparation and in the pasteurization of dairy products.
Abstract:
Disclosed is a process for forming a normalized genomic DNA library from an environmental sample by (a) isolating a genomic DNA population from the environmental sample; (b) analyzing the complexity of the genomic DNA population so isolated; (c) at least one of (i) amplifying the copy number of the DNA population so isolated and (ii) recovering a fraction of the isolated genomic DNA having a desired characteristic; and (d) normalizing the representation of various DNAs within the genomic DNA population so as to form a normalized library of genomic DNA from the environmental sample. Also disclosed is a normalized genomic DNA library formed from an environmental sample by the process.
Abstract:
Thermostable alkaline phosphatase enzymes derived from bacteria from the genus Ammonifex, Aquifex, Archaeoglobus, Desulfurococcus, Methanococcus, Thermotogales, Pyrolobus, Pyrococcus, and Thermococcus organisms are disclosed. The enzymes are produced from native or recombinant host cells and can be utilized in the pharmaceutical, food, detergent, and baking industry.