摘要:
The invention relates to lipopeptides with very homologous amino-acid sequences but different fatty acid residues (lipid portion) which are synthesized by Actinoplanes sp. during fermentation and are released into the culture medium, to a process for isolating the lipopeptides from the culture medium and purifying them, to the use of the lipopeptides as pharmacologically active substances, in particular against Gram-positive bacteria, and to Actinoplanes sp. DSM 7358 for producing the abovementioned lipopeptides.
摘要:
Novel biotransformation compounds I and II are prepared by fermenting 3-[(2'-tetrazol-5-yl-biphenyl-4-yl)methyl]-7-methyl-2-propyl-3H-imidazo[4,5-b]pyridine in a culture of Actinoplanacete sp., Accession No. ATCC 53771. ##STR1##
摘要翻译:通过发酵3 - [(2'-四唑-5-基 - 联苯-4-基)甲基] -7-甲基-2-丙基-3H-咪唑并[4,5-b]制备新的生物转化化合物I和II ]吡啶在Actinoplanacete sp。,登录号ATCC 53771的培养物中。 I II
摘要:
A process for purifying an enzyme such as glucose isomerase which comprises precipitating nucleic acids from a cell-free, heat-treated enzyme solution in a suitable buffer and chromatographing the supernatant on a cellulosic medium. Subsequent chromatography on a hydrophilic, molecular-sieve medium affords enzyme of about 90% purity.
摘要:
A process for purifying glucose isomerase comprises the steps of acid treatment and salt fractionation. An enzyme solution is treated with an acid, such as acetic acid, to a pH from about 3.5 to about 5.0. The proteinaceous solids are collected and extracted with a buffer, such as imidazole, whose solution has a pH of about 6 to about 8. The solution is then collected and a salt, such as ammonium sulfate, is dissolved therein from about 40% to about 50% of its saturation point. The proteinaceous solids which form are removed and additional ammonium sulfate is dissolved to attain from about 41% to about 60% of its saturation point, followed by collection of the solids containing purified enzyme. A composition which preserves enzyme activity upon storage of glucose isomerase and which imparts resistance to thermal deactivation of said enzyme comprises an aqueous solution of glycerol, a buffer whose solution is at a pH of about 6 to about 8, divalent cobalt ions and magnesium ions.
摘要:
Antibiotic A-7413 complex, comprising a major microbiologically active factor A, and minor active factors B, C, and D, is produced by fermentation of Actinoplanes sp. NRRL 8122. The individual factors are isolated and separated by extraction and chromatography. The A-7413 antibiotics are antibacterial agents. The A-7413 complex and A-7413 antibiotic compounds are also useful as growth-promoting agents and in the control of dental caries and acne.
摘要:
Glucopyranosyl and oligoglucosidyl derivatives of 4,6-bisdesoxy-4-(4,5,6-trihydroxy-3-hydroxymethylcyclohex-2-en-1-ylamino)-.alpha.-D-glucopyranose, which are inhibitors of glycoside hydrolases of the digestive tract, favorably improve the meat:fat ratio in animals in favor of a higher proportion of meat. A single amino-sugar or a mixture of amino-sugars can be formulated in combination with an edible carrier and fed to animals. A representative embodiment is a pig feedstuff in admixture with O-{4,6-bisdesoxy-4-[lS-(1,4,6/5)-4,5,6-trihydroxy-3-hydroxymethylcyclohex-2-en-1-ylamino]-.alpha.-D-glucopyranoxyl}-(1.fwdarw.4)-O-.alpha.-D-glucopyranosyl-(1.fwdarw.4)-D-glucopyranose.
摘要:
This invention relates to inhibitors for glycosidehydrolases derived from bacteria of the order Actinomycetales, means for their production comprising cultivation of a microorganism of the order Actinomycetales in appropriate nutrient solutions under conditions most favorable to growth and production of the enzyme inhibitor and recovering, as a new product, glycoside-hydrolase enzyme inhibitors, from the culture as well as the use of said enzyme inhibitors in pharmaceutically acceptable therapeutic compositions in the treatment of conditions indicating obesity, diabetes, pre-diabetes, gastritis, gastric ulcer, hyperlipidemia (arteriosclerosis) and the like. The invention also contemplates the provision of methods of inhibiting the reaction of carbohydrates and glycoside-hydrolase enzymes and particularly carbohydrate-splitting glycoside-hydrolase enzymes of the digestive tract by means of conducting said reaction of said carbohydrates and glycoside-hydrolase enzymes in the presence of a glycoside-hydrolase enzyme inhibitor for said glycoside-hydrolase enzyme derived from a strain of microorganism of the order Actinomycetales. The invention further contemplates the provision of methods for the treatment of indications of the group consisting of obesity, adipose, hyperlipidemia (arteriosclerosis), diabetes, pre-diabetes, gastritis, gastric ulcer, duodenal ulcer, and caries induced by the action of glycoside-hydrolase enzymes and carbohydrates, the improvement which comprises employing an enzyme inhibitor for glycoside-hydrolase enzymes produced by a strain of microorganism of the order Actinomycetales.
摘要:
This disclosure relates to an improved medium for growing organisms (preferably Actinoplanes missouriensis) which produce glucose isomerase. Use of the medium results in increased yields of enzyme in shorter fermentation times. The improved medium contains molasses, corn steep liquor, and an inorganic nitrogen salt.