Method for producing biologically active polysaccharide RON substance
First Claim
1. A process for the preparation of a biologically active polysaccharide RON substance which comprises(a) culturing a microorganism belonging to the genus Leuconostoc, which has an ability of producing a physiologically active polysaccharide RON substance, said microorganism being at least one strain of Leuconostoc mesenteroides subsp. dextranicum, said strain selected from the group consisting of strain BL-75 (FERM BP-2242), strain NCFB 517 (FERM BP-2711), strain NCFB 531 (FERM BP-2712), strain NCFB 861 (FERM BP-2713), strain NCBF 864 (FERM BP-2714), strain 46-1 (FERM BP-2670), to form a polysaccharide RON substance having the following properties:
- (1) form;
the substance is a white amorphous powder having no taste and no smell;
(2) solubility;
the substance is soluble in water, but the solution becomes milky white and viscous when the concentration is elevated;
the substance is soluble in formamide and dimethylsulfoxide, but the substance is insoluble in alcohols, acetone, benzene, ethyl acetate, hexane, chloroform and carbon tetrachloride;
(3) pH of aqueous solution;
the aqueous solution is neutral to weakly acidic;
(4) constituent saccharide;
the substance comprises solely glucose;
(5) elementary analysis values;
the substance comprises 44.0 to 45.0% of C and 6.1 to 6.3% of H;
(6) structure;
the substance is an α
-1,6-glucan and comprises a small amount of 3,6-branched side chains;
(7) proteins;
the substance comprises almost no proteins;
(8) molecular weight;
the substance does not permeate through a dialysis membrane and the molecular weight is presumed to be higher than 10,000 daltons;
(9) specific rotation;
(α
)D25 =+190°
˜
+220°
(C=0.5, formamide);
(10) color reaction;
the substance is positive to an anthrone sulfuric acid reaction and a phenol sulfuric acid reaction, but negative to a biurette reaction, the Lowry-Folin reaction, the Elson-Morgan reaction and an iodine reaction;
(11) melting point;
the substance has no definite melting point;
(12) ultraviolet absorption spectrum;
the substance has no characteristic absorption;
(13) infrared absorption spectrum;
the substance shows a characteristic absorption of α
-glucan;
(14) 13 C-NMR spectrum;
the substance shows characteristic chemical shift values of α
-1,6-glucan in the main signals; and
(15) biological activity;
the substance has an antitumor activity against mice having a transplantable tumor, and(b) collecting said substance from a culture broth.
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Abstract
A biologically active polysaccharide RON substance which is excellent in such biological activities as antitumor activities, is produced by using a microorganism belonging to the genus Leuconostoc, which has an activity of producing the RON substance.
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Citations
14 Claims
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1. A process for the preparation of a biologically active polysaccharide RON substance which comprises
(a) culturing a microorganism belonging to the genus Leuconostoc, which has an ability of producing a physiologically active polysaccharide RON substance, said microorganism being at least one strain of Leuconostoc mesenteroides subsp. dextranicum, said strain selected from the group consisting of strain BL-75 (FERM BP-2242), strain NCFB 517 (FERM BP-2711), strain NCFB 531 (FERM BP-2712), strain NCFB 861 (FERM BP-2713), strain NCBF 864 (FERM BP-2714), strain 46-1 (FERM BP-2670), to form a polysaccharide RON substance having the following properties: -
(1) form;
the substance is a white amorphous powder having no taste and no smell;(2) solubility;
the substance is soluble in water, but the solution becomes milky white and viscous when the concentration is elevated;
the substance is soluble in formamide and dimethylsulfoxide, but the substance is insoluble in alcohols, acetone, benzene, ethyl acetate, hexane, chloroform and carbon tetrachloride;(3) pH of aqueous solution;
the aqueous solution is neutral to weakly acidic;(4) constituent saccharide;
the substance comprises solely glucose;(5) elementary analysis values;
the substance comprises 44.0 to 45.0% of C and 6.1 to 6.3% of H;(6) structure;
the substance is an α
-1,6-glucan and comprises a small amount of 3,6-branched side chains;(7) proteins;
the substance comprises almost no proteins;(8) molecular weight;
the substance does not permeate through a dialysis membrane and the molecular weight is presumed to be higher than 10,000 daltons;(9) specific rotation;
(α
)D25 =+190°
˜
+220°
(C=0.5, formamide);(10) color reaction;
the substance is positive to an anthrone sulfuric acid reaction and a phenol sulfuric acid reaction, but negative to a biurette reaction, the Lowry-Folin reaction, the Elson-Morgan reaction and an iodine reaction;(11) melting point;
the substance has no definite melting point;(12) ultraviolet absorption spectrum;
the substance has no characteristic absorption;(13) infrared absorption spectrum;
the substance shows a characteristic absorption of α
-glucan;(14) 13 C-NMR spectrum;
the substance shows characteristic chemical shift values of α
-1,6-glucan in the main signals; and(15) biological activity;
the substance has an antitumor activity against mice having a transplantable tumor, and(b) collecting said substance from a culture broth. - View Dependent Claims (3, 5, 7, 9, 11)
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2. A process for the preparation of a biologically active polysaccharide RON substance which comprises
(a) causing sucrose to act on a processed culture broth of a microorganism belonging to the genus Leuconostoc, said microorganism being at least one strain of Leuconostoc mesenteroides subsp. dextranicum, said strain selected from the group consisting of strain BL-75 (FERM BP-2242), strain NCFB 517 (FERM BP-2711), strain NCFB 531 (FERM BP-2712), strain NCFB 861 (FERM BP-2713), strain NCBF 864 (FERM BP-2714), strain 46-1 (FERM BP-2670), to form a polysaccharide RON having the following properties: -
(1) form;
the substance is a white amorphous powder having no taste and no smell;(2) solubility;
the substance is soluble in water, but the solution becomes milky white and viscous when the concentration is elevated;
the substance is soluble in formamide and dimethylsulfoxide, but the substance is insoluble in alcohols, acetone, benzene, ethyl acetate, hexane, chloroform and carbon tetrachloride;(3) pH of aqueous solution;
the aqueous solution is neutral to weakly acidic;(4) constituent saccharide;
the substance comprises solely glucose;(5) elementary analysis values;
the substance comprises 44.0 to 45.0% of C and 6.1 to 6.3% of H;(6) structure;
the substance is an α
-1,6-glucan and comprises a small amount of 3,6-branched side chains;(7) proteins;
the substance comprises almost no proteins;(8) molecular weight;
the substance does not permeate through a dialysis membrane and the molecular weight is presumed to be higher than 10,000 daltons;(9) specific rotation;
(α
)D25 =+190°
˜
+220°
(C=0.5, formamide);(10) color reaction;
the substance is positive to an anthrone sulfuric acid reaction and a phenol sulfuric acid reaction, but negative to a biurette reaction, the Lowry-Folin reaction, the Elson-Morgan reaction and an iodine reaction;(11) melting point;
the substance has no definite melting point;(12) ultraviolet absorption spectrum;
the substance has no characteristic absorption;(13) infrared absorption spectrum;
the substance shows a characteristic absorption of α
-glucan;(14) 13 C-NMR spectrum;
the substance shows characteristic chemical shift values of α
-1,6-glucan in the main signals; and(15) biological activity;
the substance has an antitumor activity against mice having a transplantable tumor, and(b) collecting said substance. - View Dependent Claims (4, 6, 8, 10)
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- 12. A biologically pure culture of microorganism, Leuconostoc mesenteroides subsp. dextranicum strain BL-75 (FERM BP-2242) or strain 46-1 (FERM BP-2670).
Specification