摘要:
The present invention relates to a process for producing a transglutaminase, which comprises incubating Escherichia coli expressing genes encoding a heat shock protein (DnaJ) and a transglutaminase. The transglutaminase is produced in large quantities, at low cost and has the appropriate stereostructure to render the transglutaminase biologically active. The transglutaminase so produced is useful in the food industry.
摘要:
A transglutaminase protein which is mutated to have improved heat resistance and/or pH stability. A mutation is introduced into WT transglutaminase at a cysteine residue capable of forming a disulfide bond (SS bond).
摘要:
Molecules of a specific species can be selectively excited among molecules of a plurality of species that show only a slight difference of mass. Energy levels can be displayed on a graph where the horizontal axis indicates excitation energy. Assume an instance where an electromagnetic wave showing a comb-shaped spectrum having a plurality of narrow bands as indicated by P1 through P14 and tuning with excitation energies corresponding to the rotational levels of molecule X is irradiated onto the molecule X. The molecule X can sequentially make transitions to higher energy levels by using an electromagnetic wave showing such a comb-shaped spectrum. The energy levels of molecule Y are not synchronized with the comb-shaped spectrum. The two ranges of Y4 through Y7 and Y12 through Y15 operate as gates and the molecule Y cannot make transition from a rotational level to another when a gate is found between them.
摘要:
To provide a user with better experience of cooperation between an electronic business card processing program and a communication program when exchanging electronic business cards. Electronic business cards are stored in a DB server, which is one of storages for a communication program, as well as an electronic business card local file. Thus, even if a PC is a company's PC, for example, the electronic business cards can be viewed by accessing the DB server from another PC or the like outside an office. Further, the electronic business card processing program operates with the communication program as backend, however, the electronic business card processing program may not be installed on a PC in some cases. Even in such a case, the communication program alone can display received electronic business cards that are stored in the communication program local file on the screen of a display.
摘要:
The present invention relates to a process for secretory production of a foreign protein, in particular, transglutaminase by a coryneform bacterium.According to the present invention, a process is provided for the secretory production of a foreign protein, in particular, transglutaminase, by making a coryneform bacterium to produce an industrially useful foreign protein, in particular, transglutaminase and efficiently release the product extracellularly (i.e., secretory production).An intended foreign protein, in particular, transglutaminase, is produced by using an expression construct wherein the gene sequence of the intended foreign protein containing the pro-structure part, in particular, pro-transglutaminase gene sequence, is ligated to the downstream of a sequence encoding the signal peptide region from a coryneform bacterium, introducing this expressional genetic construct into a coryneform bacterium, culturing the thus transformed coryneform bacterium, and treating the extracellularly released protein with a protease, etc. to cleave and eliminate the pro-part.
摘要:
Provided is a method for efficiently producing a 3-amino-4-hydroxybenzoic acid-type compound by culturing a coryneform bacterium that has a gene encoding a mutated aspartokinase not subject to feedback inhibition, and that is transformed with a recombinant vector containing a DNA encoding a protein having an activity to form 3-amino-4-hydroxybenzoic acid from dihydroxyacetone phosphate and aspartate semialdehyde.
摘要:
The present invention relates to a process for secretory production of a foreign protein, in particular, transglutaminase by a coryneform bacterium.According to the present invention, a process is provided for the secretory production of a foreign protein, in particular, transglutaminase, by making a coryneform bacterium to produce an industrially useful foreign protein, in particular, transglutaminase and efficiently release the product extracellularly (i.e., secretory production).An intended foreign protein, in particular, transglutaminase, is produced by using an expression construct wherein the gene sequence of the intended foreign protein containing the pro-structure part, in particular, pro-transglutaminase gene sequence, is ligated to the downstream of a sequence encoding the signal peptide region from a coryneform bacterium, introducing this expressional genetic construct into a coryneform bacterium, culturing the thus transformed coryneform bacterium, and treating the extracellularly released protein with a protease, etc. to cleave and eliminate the pro-part.
摘要:
The present invention provides a neutral metalloprotease from actinomycetes which selectively cleaves a pro-structure part of a microbial protransglutaminase and a gene encoding said neutral metalloprotease. An active microbial transglutaminase having the pro-structure part cleaved can be obtained by culturing a microorganism into which a gene encoding the neutral metalloprotease from actinomycetes according to the present invention has been introduced, where by producing the neutral metalloprotease from actinomycetes, and reacting it on a microbial protransglutaminase.
摘要:
The present invention relates to a method for designing and preparing mutant transglutaminases on the basis of the three-dimensional structure of MTG derived from Streptoverticillium mobaraense (MTG), and the mutant MTG thus prepared. The present invention provides a method for modifying MTG on the basis of the three-dimensional structure, and transglutaminase having reactivity on the substrate improved by the method. In the present invention, the binding site of MTG for the substrate is extrapolated based on the three-dimensional structure obtained by X-ray crystal structure analysis of MTG crystals, and the mutant transglutaminases are designed and produced by replacing, inserting or deleting amino acid residues positioned at the substrate-binding site of the transglutaminase.
摘要:
The present invention relates to a high-yield process for producing high-activity, high-purity transglutaminase by refolding denatured microorganism-derived transglutaminase by reacting denatured transglutaminase in an aqueous medium under acidic conditions and reconstituting a higher-order enzymatically active state in an aqueous medium at a neutral pH.