摘要:
The present invention relates to fungal strains capable of producing insecticide and a process for production of insecticide. It also relates to a method of cultivation of fungal strains and a fermentation medium for culturing the fungal strains.
摘要:
A proteinase-resistant cellulase, a microorganism producing the same, and a process for producing such a proteinase-resistant cellulase is disclosed. The cellulase can be used as an additive to detergent compositions for washing clothes containing a proteinase, without immobilization or stabilization by chemical modification. The proteinase-resistant cellulase can be produced by a novel microorganism, Aspergillus niger KSM-24 [deposited with Fermentation Research Institute, Agency of Industrial Science and Technology (FERM BP-3359)].
摘要:
The present invention relates to a method of preparing an anthocyanin oligomer using a coenzyme derived from an Aspergillus sp. strain, and more particularly to a method of preparing an anthocyanin oligomer by fermenting an anthocyanin monomer with a coenzyme of Aspergillus niger, which is a kind of Aspergillus sp. strain. According to the present invention, in order to overcome contamination problems during the culturing process using Aspergillus niger, a coenzyme of Aspergillus niger is extracted and the fermentation process is performed using the same, whereby an anthocyanin oligomer characterized by reduced concern of contamination and superior radical-scavenging effects, compared to existing anthocyanin monomers, can be produced. Also, an anthocyanin oligomer, obtained through fermentation using glucosidase as an enzyme contained in the coenzyme, can exhibit excellent fermentation efficiency and radical-scavenging ability, and polymerization of the anthocyanin oligomer can be confirmed even upon the fermentation of the enzyme including glucosidase.
摘要:
The purpose of the present invention is to provide an organism having an ergothioneine productivity that is capable of easily producing ergothioneine within a short period of time at a high yield, as compared with a conventional technology, and, therefore, enables ergothioneine production on an industrial scale. This purpose can be achieved by a transformed fungus into which a gene encoding enzyme (1) or genes encoding enzymes (1) and (2) have been inserted and in which the inserted gene(s) are overexpressed. (1) an enzyme catalyzing a reaction of synthesizing hercynyl cysteine sulfoxide from histidine and cysteine in the presence of S-adenosyl methionine, iron (II) and oxygen. (2) An enzyme catalyzing a reaction of synthesizing ergothioneine from hercynyl cysteine sulfoxide using pyridoxal 5′-phosphate as a coenzyme.
摘要:
The present disclosure relates to isolated nucleic acid sequences encoding polypeptides having transcriptional activation activity and to the polypeptides. The disclosure also relates to nucleic acid constructs, vectors and host cells including the nucleic acid sequences. The invention further relates to host cells useful for the production of polypeptides in which the production or function of the transcriptional activator has been altered, as well as to methods for producing the polypeptides.
摘要:
The invention relates to oxalate deficient A. niger strains for the production of a given enzyme, wherein the oxalate deficient strain produces at least the same amount of enzyme as the wild type strain it originates from under the same culture conditions. Preferably, the oxalate deficient A. niger strain produces more enzyme than the wild type strain it originates from under the same culture conditions. More preferably, the oxalate deficient A. niger strain is such that when the strain has been transformed with an expression construct comprising a gene coding for an enzyme, said strain produces at least the amount of the enzyme the wild type strain it originates from would produce under the same culture conditions, when the wild type strain has also been transformed with the same expression construct as the oxalate deficient strain. The invention also relates to method for obtaining such oxalate deficient A. niger strain. The present invention further relates to method for producing an enzyme, wherein an oxalate deficient A. niger strain that produces at least the same amount of enzyme as the wild type strain it originates from under the same culture conditions is used.
摘要:
The present invention relates to a process for the production of a valuable compound by cultivation of a microorganism comprising cultivating the microorganism in a medium wherein all nutrients are provided in excess over the whole cultivation period and wherein a suitable amount of oxygen is fed to the culture to maintain the culture under conditions of oxygen limitation.
摘要:
A preparation method conducive to enhancing enzymatic activity of cellulase includes the steps of preparing a first inducer, preparing preculture hyphae, producing enzymes by a single strain, feeding a second inducer, and producing enzymes by co-culture strains. Main ingredients of the first inducer and the second inducer are cellulose and lactose, respectively. The enzymatic activity of the cellulase produced is enhanced by induction of cellulose and lactose and co-culture of Trichoderma and Aspergillus.
摘要:
The present disclosure relates to isolated nucleic acid sequences encoding polypeptides having transcriptional activation activity and to the polypeptides. The disclosure also relates to nucleic acid constructs, vectors and host cells including the nucleic acid sequences. The invention further relates to host cells useful for the production of polypeptides in which the production or function of the transcriptional activator has been altered, as well as to methods for producing the polypeptides.
摘要:
The present invention relates to fungal strains capable of producing insecticide and a process for production of insecticide. It also relates to a method of cultivation of fungal strains and a fermentation medium for culturing the fungal strains.