Physiologically active polysaccharides, production and uses thereof
First Claim
Patent Images
1. A physiologically active polysaccharide which is derived from brewer'"'"'s yeast cell walls and possesses:
- (1) an elemental analysis as follows by weight
space="preserve" listing-type="tabular">______________________________________ C 40.9% ±
1.2% H 6.0% ±
0.2% N 1.9% ±
0.1% O 50.7% ±
1.5% Ash 0.5% ±
0.05%;
______________________________________ (2) an average molecular weight determined by an ultrafiltration method of 140,000 to 220,000;
(3) no melting point since no melting point is generally observed in polysaccharides, the active polysaccharide turning brown at about 265°
C. and black at about 270°
C.;
(4) a specific rotation expressed by[α
]D25 =+75.0 to +55.0 (C=1.0);
(5) an ultraviolet absorption spectrum as shown in FIG. 1, in which no specific absorption is observed;
(6) an infrared absorption spectrum as shown in FIG. 2;
(7) solubility in water and insolubility in methanol, ethanol, ether and acetone;
(8) a positive color reaction in anthrone reaction, Molisch'"'"'s reaction, ninhydrin reaction, biuret reaction and xanthoproteic reaction;
(9) a pH of a 1% aqueous solution thereof of 5.5 to 6.5;
(10) a white color;
(11) 75 to 86% of mannose and 14 to 25% of glucose, a small quantity of glucosamine being detected;
(12) a bond structure of the sugar in which mannose is linked by α
-bond since a sugar is liberated therefrom by an α
-mannanase; and
(13) constituent amino acids comprising 26 to 32% of serine, 16 to 20% of threonine, 13 to 17% of alanine, 7 to 9% of proline, 5 to 7% of glutamic acid, 5 to 7% of aspartic acid, 4 to 6% of valine, 3 to 5% of lysine, 3 to 4% of glycine, 2.5 to 3.5% of isoleucine, 1.5 to 2.5% of leucine, 0.5 to 1.5% of tyrosine, and 0.3 to 0.7% of phenylalanine.
0 Assignments
0 Petitions
Accused Products
Abstract
A physiologically active polysaccharide is prepared by treating autolysis-insoluble matters of yeasts of Saccharomyces with a yeast cell wall-lytic enzyme and obtaining a water-soluble physiologically active substance in the resulting solution-fraction. The novel polysaccharide possesses specific physical and chemical properties, and provides a chemotherapeutic agent such as a carcinostatic agent which can be used in the treatment of implanted tumors in mice and rats and an interferon inducer.
-
Citations
16 Claims
-
1. A physiologically active polysaccharide which is derived from brewer'"'"'s yeast cell walls and possesses:
-
(1) an elemental analysis as follows by weight
space="preserve" listing-type="tabular">______________________________________ C 40.9% ±
1.2% H 6.0% ±
0.2% N 1.9% ±
0.1% O 50.7% ±
1.5% Ash 0.5% ±
0.05%;
______________________________________(2) an average molecular weight determined by an ultrafiltration method of 140,000 to 220,000; (3) no melting point since no melting point is generally observed in polysaccharides, the active polysaccharide turning brown at about 265°
C. and black at about 270°
C.;(4) a specific rotation expressed by [α
]D25 =+75.0 to +55.0 (C=1.0);(5) an ultraviolet absorption spectrum as shown in FIG. 1, in which no specific absorption is observed; (6) an infrared absorption spectrum as shown in FIG. 2; (7) solubility in water and insolubility in methanol, ethanol, ether and acetone; (8) a positive color reaction in anthrone reaction, Molisch'"'"'s reaction, ninhydrin reaction, biuret reaction and xanthoproteic reaction; (9) a pH of a 1% aqueous solution thereof of 5.5 to 6.5;
(10) a white color;(11) 75 to 86% of mannose and 14 to 25% of glucose, a small quantity of glucosamine being detected; (12) a bond structure of the sugar in which mannose is linked by α
-bond since a sugar is liberated therefrom by an α
-mannanase; and(13) constituent amino acids comprising 26 to 32% of serine, 16 to 20% of threonine, 13 to 17% of alanine, 7 to 9% of proline, 5 to 7% of glutamic acid, 5 to 7% of aspartic acid, 4 to 6% of valine, 3 to 5% of lysine, 3 to 4% of glycine, 2.5 to 3.5% of isoleucine, 1.5 to 2.5% of leucine, 0.5 to 1.5% of tyrosine, and 0.3 to 0.7% of phenylalanine. - View Dependent Claims (2, 3, 16)
-
- 4. A process for preparation of a physiologically active polysaccharide, which comprises causing a yeast cell wall-lytic enzyme to act on an autolysis-insoluble matter of a yeast of Saccharomyces, and obtaining a water-soluble physiologically active polysaccharide in the resulting solution-fraction.
Specification