Abstract:
Process for releasing poly(3-hydroxy carboxylic acid) granules from cells of Gram-negative bacteria containing the latter, by expression of a cloned natural or chimeric lysis gene, in which, before induction of lysis gene expression, the ionic strength of doubly charged cations is increased to between 0.05 and 0.5 mol/1, the expression of the lysis gene is induced by raising the temperature, the cells are harvested, and the still wet cells are resuspended in water or buffer solutions, which results in the release of the polymer granules by spontaneous lysis.
Abstract:
A substantially purified N-acyl-L-proline-acylase from Comamonas testosteroni DSM 5416 and Alcaligenes denitrificans DSM 5417. The enzyme is useful for the synthesis of L-proline from various N-acyl-L-proline derivatives.
Abstract:
A novel cyanide converting enzyme, a "cyanidase" is described.The enzyme is extremely efficient in reducing substantial concentrations of cyanide to very low levels in a broad pH, and temperature range, and in the presence of organics and metal ions.
Abstract:
A method for producing S-adenosyl-L-homocysteine hydrolase, which comprises cultivating a microorganism having the ability to produce S-adenosyl-L-homocysteine hydrolase within its cells in a nutrient medium to accumulate said hydrolase in the cells, said microorganism being a bacterium belonging to the genera Alcaligenes, Pseudomonas, Acinetobacter, Arthrobacter, Enterobacter, Rhodopseudomonas, Agrobacterium, Micrococcus, Corynebacterium, Brevibacterium, Chromobacterium, Xanthomonas, Flavobacterium, Cellulomonas, Azotobacter and Protaminobacter, or an actinomycete belonging to the genera Streptomyces, Mycobacterium, Nocardia, Streptoverticillium, Micromonospora, Micropolyspora, Streptosporangium and Microellobosporia; and then recovering S-adenosyl-L-homocysteine hydrolase from the cells.
Abstract:
.alpha.-L-aspartylphenylalanine lower alkyl esters are prepared by a process wherein L-aspartic acid and a lower alkyl ester of L-phenylalanine are contacted with a culture or treated culture product of a microorganism belonging to the genus Pseudomonas, Alcaligenes, Torulopsis, Rhodotorula or Sporobolomyces and being capable of producing a .alpha.-L-aspartyl-L-phenylalanine lower alkyl ester from L-aspartic acid and a lower alkyl ester of L-phenylalanine.
Abstract:
Biochemical optical resolution of DL-tryptophans in which DL-tryptophan amides are interacted with the culture products, or their treated products, of a microorganism capable of producing amidase is described. L-Tryptophan amides in racemic DL-tryptophan amides are asymmetrically hydrolyzed to form optically active L-tryptophans at a high yield and almost all D-tryptophan amides remain without being subjected to hydrolysis. The resultant D-tryptophan amides are readily hydrolyzed, after separating L-tryptophans, to form optically active D-tryptophans at a high yield.
Abstract:
The present invention is directed to a two-stage continuous process for the production of a gelable curdlan-type exopolysaccharide. In the first stage a stable, curdlan-producing strain of microorganism such as Alcaligenes faecalis var. myxogenes ATCC 31749 and ATCC 31750, is grown aerobically in an aerated, agitated culture medium containing assimilable carbon, nutrients and organic salts. The amount of nitrogen in the first stage is so limited that the effluent therefrom contains substantially no inorganic nitrogen. The effluent is introduced into a second stage in a constant volume fermenter wherein it is mixed with a nitrogen-free carbohydrate. The resultant mixture is aerated and mixed at pH 5.5 to 6.5 at a temperature of from 25.degree. to 35.degree. C., the volume and dilution rate in the reactor being selected so that the residence time of the microorganism in the fermenter does not exceed an equivalent to the maximum length of time during which the activity of a batch culture of the microorganism with respect to product synthesis is maximal. The product is subsequently isolated.
Abstract:
A method for producing RNA is provided. Objective RNA is produced by culturing a coryneform bacterium having an expression unit for the objective RNA, which has been modified so that the activity of ribonuclease III is reduced, in a medium, to express the objective RNA and accumulate the objective RNA in cells of the bacterium, and collecting the objective RNA from the cells.
Abstract:
The present disclosure provides an Alcaligenes faecalis strain capable of degrading ethylene oxide and uses thereof. The deposit number of the strain is CGMCC No. 18435. This strain can be used in pollution treatment, for example, to treat industrial sewage or wastewater containing ethylene oxide, which greatly improves the decontamination ability of ethylene oxide in manufacturing industries. The present disclosure also provides a degradation agent for degrading ethylene oxide and a method for biodegrading ethylene oxide.
Abstract:
The present disclosure provides an Alcaligenes faecalis strain capable of degrading ethylene oxide and uses thereof. The deposit number of the strain is CGMCC No. 18435. This strain can be used in pollution treatment, for example, to treat industrial sewage or wastewater containing ethylene oxide, which greatly improves the decontamination ability of ethylene oxide in manufacturing industries. The present disclosure also provides a degradation agent for degrading ethylene oxide and a method for biodegrading ethylene oxide.