JPH06189747A - Novel microorganism - Google Patents

Abstract

PURPOSE:To provide a novel microorganism producing a macrolide antibiotic having an antibacterial activity against pathogenic bacteria such as gram-positive bacteria, gram-negative bacteria and mycoplasma and useful for preventing and treating microbisms. CONSTITUTION:Micromonospora SP-YS-02930k strain (FERN P-1076), or its mutant having an ability of producing antibiotics YS-02930K-D, YS-02930K-E and/or YS-02930K-H. The YS-02930K strain is obtained by separating the strain from natural soil by a known method.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention belongs to the genus Micromonospora and includes the antibiotics YS-02930K-D and / or YS-.
02930 KE and / or YS-02930 K-
The present invention relates to a novel microorganism having an H-producing ability.

[0002]

The antibiotics produced by the present invention are macrolide antibiotics represented by the following general formula.

[0003]

[Chemical 1]

(In the formula, R represents a hydrogen atom or a formyl group,
The dotted line indicates a double bond or formula between these

[0005]

[Chemical 2]

Means a bond represented by ) YS-02
In the 930K-D substance, R is a formyl group, and the dotted line is a compound having a double bond. In the YS-02930K-E substance, R is a formyl group and the dotted line is a formula.

[0007]

[Chemical 3]

A compound having a bond represented by
The 2930K-H substance is a compound in which R is a hydrogen atom and the dotted line is a double bond. (Hereafter, simply D
Substances, E substances, and H substances).

Conventionally, the D substance is included in the inventions disclosed in JP-A-57-28100, the E substance is included in JP-A-59-33298, and the H substance is included in JP-A-58-96096. All of them are known substances. According to the above publication, the substance D is 3,23-O-methoxymethyl (or tetrahydrofuranyl) mycaminosyltylonolide diethyl acetal as a raw material, and after removing the hydroxy group at the 4'-position, the hydroxy at the 3,23-position is removed. It is produced by a chemical synthesis method in which the protecting group for the group and the protecting group for the aldehyde group at the 18-position are eliminated. Also,
The E substance was prepared by treating 4'-deoxymycaminosyl tylonolide diethyl acetal with peracid, followed by triphenylphosphine to epoxidize the 12th and 13th positions, and then removing the protecting group of the aldehyde. The substances are 4'-deoxy mycaminosyl tylonolide and chlorotris (triphenylphosphine).
It is chemically synthesized by the method of using rhodium.

[0010]

However, production of the substances D, E and H by the fermentation method, not by the chemical synthesis method, has heretofore been unknown at all. One of the objects of the present invention is to provide a microorganism that produces these substance D and / or substance E and / or substance H.

[0011]

As a result of searching for microorganisms that produce pharmacologically active substances, the present inventors have determined that the microorganisms isolated from soil by the conventional method are micromonospora based on their mycological properties. The present invention was completed by finding out that it is a new species of actinomycete belonging to the genus and finding that the actinomycete produces antibiotics D, E and H substances.

That is, the present invention relates to a microorganism belonging to the genus Micromonospora and producing an antibiotic substance D substance and / or E substance and / or H substance.

(Microorganism) Microorganisms belonging to the genus Micromonospora of the present invention and having the ability to produce antibiotics D substance and / or E substance and / or H substance are specifically, for example, Micromonospora sp. ) YS-0
The 2930 K strain can be mentioned. YS-0293
The mycological properties of the 0K strain are as follows.

1. Morphological properties The bacterium does not form true aerial hyphae on various commonly used agar media. When the hyphae grown on a medium with good sporulation are scraped and observed under a microscope, one spore (rarely two) is present at the apex of the spore stalk (0.2 to 0.8 μm) branched from the basal hyphae. Settles and forms all over the hypha. Classification of Luedemann et al. [Anti-microvial agents and chemotherapies
(Antimicrob. Ag. Chemoth.) 1964, 47-52 (1965)], the branching method of spore stalk is mono-positive type (Monopodi
al type). Electron microscopically, the spores are spherical (about 0.8 to 1.2 μm in diameter) and the surface is smooth.
When cultivated in a liquid medium, hyphae are hardly branched and elongated, and a spherical structure (major axis 8 to 10 μm) is observed between hyphae. By electron microscopy, these structures were judged to be caused by the fusion of hyphae.

2. Growth state on each medium The growth state on each agar medium is as shown below. Unless otherwise specified, the cells were cultured at 28 ° C. for 21 days and observed according to a conventional method. The color tone is based on the color standard (Japan Color Research Institute).

[0016]

[Table 1]

(Note) G: color of growth and colonies on colony surface R: hue of back surface S: soluble pigment Physiological properties

[0018]

[Table 2]

(Note) The growth temperature depends on each temperature (5.10.1
5.20.255.28.30.33.37.40.4
5.50 ° C.) up to 7 to 21 days of observation The effects on milk are observed at 37 ° C. up to 3 to 21 days, and the observation results after 2 weeks at 28 ° C. unless otherwise indicated. 4. Assimilation of each carbon source (28 ° C culture on Pridham-Godlieve agar medium)

[0020]

[Table 3]

[0021] 5. Analysis of cell wall composition Method of Lechevalier et al. [Lichevalier, MP, et al .; Diets, E-PP227-22
8th, Actinomycete Takisonomy SIM Special Publication (Lechevalier, MP
et al; PP227-228 in Dietz, A. et al ed., Actinomyce
te Taxonony.SIM Special publication) No.6, 1980]
As a result of the analysis of the cell wall component of this strain and the acid hydrolyzate of the whole cell according to the above, as characteristic amino acids, mesodiamipimelic acid, 3-hydroxydiaminopimelic acid,
It was confirmed that it contained glycine and glycine, and contained xylose and arabinose as sugar components.

In summary of the above-mentioned mycological properties, YS-0
Strain 2930 K does not form true aerial hyphae on various agar media and is a spore stalk (Monopodial typ.
e) forms a single spore (rarely two). In liquid culture, hyphae are hardly branched, extend long, and hyphae fuse to form a spherical structure. The analysis of cell wall and whole cell acid hydrolysates confirmed the presence of mesodiaminopimelic acid and glycine, and the presence of xylose and arabinose as sugars.

From the above properties, this strain is judged to be an actinomycete belonging to the genus Micromonospora. A known strain similar to this strain was selected from the Bergey's Manual of Determinative Bact, 8th Edition, 1974 (Bergey's Manual of Determinative Bact
eriology 8th Edition (1974)) and various literatures, the spores are spherical and the surface is smooth,
Micromonospora calcea (Micromonospora cacea) is a bacterium that grows in orange to yellow tea on the agar medium.
halcea), Micromonospora Harofitika (Micromo
Nospora halophytica) and Micromonospora carbonaceae. However, M. Calcea can assimilate α-melibiose, raffinose, L-arabinose, D-glucose, D-galactose, starch, sucrose, and D-xylose as carbon sources as shown in Table 4 below, while YS-02930K. Strains are L-arabinose, D-
It can utilize glucose, sucrose, and starch, but cannot utilize the other sugars mentioned above (α-melibiose does a little). In addition, YS-02930K strain is M. There is no cellulose degradability like that found in calcea.

In addition, M. Halophytica assimilates L-arabinose, D-galactose, D-glucose, D-fructose, D-mannose, α-mellibiose, raffinose, starch, sucrose and D-xylose as carbon sources as shown in Table 1 below. , YS-02930
It differs greatly from the K strain in terms of carbon source availability. In addition, M. Halofitica is also YS-02930 in terms of nitrate reducibility (positive) and cellulose decomposing ability (positive).
Different from K strain.

Next, Micromonospora carbonacea has spherical spores and a smooth surface, and forms long hyphae without branching in liquid culture, and the color of growth on agar medium is orange-yellow brown-black. It is similar to the YS-02930K strain. However, regarding the availability of sugar, as shown in Table 1, Y
The strain S-02930K is different in the availability of D-xylose, D-fructose and α-melibiose, and also different in the reducing ability of nitrate. Also, the spore-bearing mode is M. Carbonacea is a symposium type (S
ympodial type), but YS-02930K strain is a mono-opial type and is different.

Comparison of carbon source availability (Pridham and Gottlieb; Journal of Bacteriology (J. Bc
teriol)., 56,107,1948)

[0027]

[Table 4]

[0028] As another bacterial species, Micromonospora spp., Which has been reported to produce macrolide antibiotics, includes Micromonospora rosaria.
pora rosaria) Micromonospora Megaromicia (Mic
romonospora megalomiciae) Micromonospora inositola Micromonospora calcae varietus izmensis
Ra chalcea var izumensis), but produces soluble pigment of wine red color, and has a spiny structure with a characteristic spore surface. Grows well on tyrosine agar,
Production of melanin pigment is observed. Does not grow on glucose and asparagine agar. It also uses inositol as the sole carbon source. Is M. As described in the section of Calcea, the utilization of the carbon source is better than that of the YS-02930 strain, and the utilization of α-melibiose and raffinose is particularly characteristic. From the above points, YS
It is clearly different from the -02930K strain. As described above, YS-in the previously reported Micromonospora spp.
No bacterial strain was found to match 02930K, and it is judged to be a new bacterial strain. Therefore, this strain was named Micromonospora sp. YS-02930K strain. This strain has been deposited in the Institute of Microbial Technology, Ministry of International Trade and Industry, Institute of Microbial Science and Technology, as Micro Works Research Article No. 1076.

The microorganism according to the present invention is characterized by producing antibiotics D substance and / or E substance and / or H substance, in addition to the above-mentioned characteristics in mycological properties. The strain used in the present invention, as seen in other actinomycetes,
The YS-02930K strain referred to in the present invention is a actinomycete isolated from nature, although it is prone to mutation artificially and naturally.
Alternatively, it also includes bacterial strains artificially mutated with ultraviolet rays, X-rays, chemical agents, etc. and natural mutants thereof.

The microorganism belonging to the novel fungal species of the present invention is obtained by separating it from natural soil, but it can be easily obtained by reconstitution of the freeze-dried product of the strain deposited at the Institute of Microbial Science and Technology. be able to.

(Culture method) The culture of the microorganism according to the present invention is
It is performed using a medium containing a nutrient source utilized by the microorganism. The medium may be synthetic, semi-synthetic, or natural, solid or liquid medium, but a liquid medium containing a natural nutrient source is preferable. The nutrient source added to the medium may be any carbon compound capable of assimilation as the carbon source, and examples thereof include arabinose, sucrose, starch, glucose, glucose, starch, dextrin, coconut oil, soybean oil, and α-melibiose. Used alone or in combination. In addition, alcohols and organic acids may be used in some cases. Inorganic and organic nitrogen sources include ammonium chloride, sodium nitrate, ammonium sulfate, ammonium nitrate, and urea, and organic nitrogen sources include peptone, yeast extract, and
Dry yeast, meat extract, gluten meal, corn steep liquor, soybean flour, fish meal, peanut flour, cottonseed meal, casamino acids and various amino acids (eg glutamic acid, alanine, lysine, etc.) are used alone or in combination.

If necessary, a sulfate, nitrate, chloride, carbonate or phosphate of a metal such as sodium, potassium, magnesium, calcium, zinc, iron or cobalt can be added to the medium. The culture is preferably carried out under aerobic conditions, and any of standing, shaking, and aeration-agitation culture is possible, but shaking or aeration-agitation culture is advantageous. The culture temperature is preferably in the range of about 25 to 33 ° C, and particularly preferably about 27 to 29 ° C. Also, p of the medium
It is preferred that H be held near neutral at about 5.5 to 8.5. The culture period varies depending on the culture conditions such as the composition of the medium and the temperature, but it is usually about 2 to 14 days.
The culture is terminated at an appropriate time in consideration of the time when the substances E and H reach the maximum titer.

In order to isolate and purify the antibiotics accumulated in the culture thus cultivated, a commonly used isolation and purification means may be applied. When Micromonospora sp. YS-02930K strain is cultured under the culture conditions described in Examples, at least two kinds of antibacterial active substances are accumulated in the culture medium.

The isolation and purification of the antibacterial active substance is carried out by centrifuging or filtering the culture to remove the bacterial cells, and then the solubility and the difference in solubility in an appropriate solvent, the difference in the precipitation from the solution and the difference in the precipitation rate. It is preferable to apply a method utilizing a difference in adsorption affinity for various adsorbents, a difference in distribution between two kinds of liquid phases, and the like. These methods may be used alone, or combined in any order, and vice versa.

Among the products produced by culturing the YS-02930K strain, for the substances D and E, a methanol solution of the mixture was placed on a silica gel 60F ₂₅₄ thin layer plate manufactured by Merck and chloroform: methanol: 28% ammonia water (4
When thin layer chromatography using 0: 10: 0.2) as a developing solvent was performed, it was divided into spots with Rf values of 0.58 and 0.62, and by utilizing this property, isolation can be easily performed. . The purified product isolated from the former spot is substance D, and the purified product isolated from the latter spot is substance E.

As the substance H, a mixed solution of chloroform-methanol 28% ammonia water was used in place of the above-mentioned methanol solvent, and this was applied to a silica gel thin layer plate (for example,
By performing thin layer chromatography on Silica Gel 60F ₂₅₄ manufactured by Merck Co., Ltd. using the above mixed solution (mixing ratio 160: 40: 0.5) as a developing solvent, it is possible to isolate from a spot having an Rf value of 0.62. .

(Product) The physicochemical properties of the antibiotic substances D, E and H thus obtained are as follows. (A) Physicochemical properties of substance D (1) Ultraviolet absorption spectrum: λ _max. 283 nm
(MeOH) (2) Infrared absorption spectrum: The infrared absorption spectrum of this substance by the potassium bromide tablet method is shown in FIG. (3) Nuclear magnetic resonance spectrum: The nuclear magnetic resonance spectrum of the substance in deuterated chloroform at 100 MHz is shown in FIG. (4) Mass spectrometry: Main fragment peaks 158, 407 and 581 (M ⁺ ) by EI-MS Peak 797 (M ⁺ ) by EI-MS of TMS derivative (5) Appearance: colorless powder (6) Base Distinction between basic, neutral and acidic: basic substance (7) Rf value of thin layer chromatography: silica gel 6
Uses 0F ₂₅₄ (Merck) Detection: UV ₂₅₄ nm

[0038]

[Table 5]

(B) Physicochemical properties of substance E (1) Ultraviolet absorption spectrum: λ _max. 240 nm
(MeOH) (2) Mass spectrometry: Main fragments by EI-MS
Peaks 158, 423 and 597 (M ⁺ ) Peak 813 (M ⁺ ) by EI-MS of TMS derivative (3) Appearance: colorless powder (4) Distinction between basic / neutral / acidic: basic substance (5) Dissolution Properties: Soluble in methanol, ethanol, acetone ethyl acetate and chloroform (6) Rf value of thin layer chromatography: silica gel 6
Using 0F ₂₅₄ (Merck) Detection: UV ₂₅₄ nm

[0040]

[Table 6]

(C) Physicochemical properties of substance H (1) Ultraviolet absorption spectrum: λ _max. 283 nm
(MeOH) (2) Infrared absorption spectrum: The infrared absorption spectrum of this substance by the potassium bromide tablet method is shown in FIG. (3) Nuclear magnetic resonance spectrum: The nuclear magnetic resonance spectrum of this substance in deuterated chloroform at 100 MHz is shown in FIG. (4) Mass spectrometry: Fragment peaks 158, 174, 379 and 553 (M ⁺ ) by EI-MS (5) Molecular weight and molecular formula: 553 (C ₃₀ H ₅₁ NO ₈ ) (6) Appearance: colorless powder (7) Distinction between basic, neutral and acidic: basic substance (8) Rf value of thin layer chromatography: silica gel 6
0F ₂₅₄ (Merck) is used. Detection: UV ₂₅₄ nm

[0042]

[Table 7]

The above substances D, E and H all have antibacterial activity against pathogenic bacteria such as Gram-positive bacteria, Gram-negative bacteria and Mycoplasma. From the above physicochemical properties and biological activity, the product obtained by the fermentation method of the present invention is

[0044]

[Chemical 4]

The substance represented by

[0046]

[Chemical 5]

The substance represented by

[0048]

[Chemical 6]

The substance was identified as:

[0050]

As described above, the antibiotics D, E and H provided by the microorganism of the present invention are more gram-positive, gram-negative and mycoplasma than conventional macrolide antibiotics. It has an excellent antibacterial activity against pathogenic bacteria such as and is a useful substance for the prevention and treatment of these bacterial infections. INDUSTRIAL APPLICABILITY The present invention is industrially remarkable in that it is possible to directly produce a useful antibiotic substance D substance and substance E substance H substance, which could be produced only by chemical modification of fermentation products, by a direct fermentation method. Has a great effect.

[0051]

EXAMPLES The present invention will be described in more detail with reference to the following examples. Example 1. White dextrin 2.0%, glucose 0.
5%, Polypeptone 0.5%, Yeast Extract 0.5%, Brain Heart Infusion 0.52%, Corn
A medium (pH 8.0) containing 0.5% of steep liquor, 0.3% of meat extract and 0.2% of calcium carbonate was prepared, and 60 ml of each was dispensed into a 500 ml Erlenmeyer flask, which was stored at 120 ° C. for 20 minutes. Micromonospora sp. YS grown on Bennett's agar medium sterilized for minutes
The mycelium of strain -02930K is scraped off and inoculated, and shake culture is carried out at 27 ° C for 72 hours to obtain a seed culture solution. Next, potato starch 3.0%, soybean flour 1.5%, corn steep liquor 0.5%, yeast extract 0.2%, magnesium sulfate heptahydrate 0.05%, sodium chloride 0.3.
%, Cobalt chloride / hexahydrate 0.002%, and adecanol (Asahi Denka Co., Ltd.) 0.03% in a medium of 25 l (pH 7.
A 30-liter stainless steel fermenter containing 1) was inoculated with the seed culture solution at a rate of 3.0%. Aeration rate 25l / min, stirring 9
5 to 150 rpm, 72 at a temperature of 28.0 to 28.5 ° C
Bacillus subtilis ATCC66 after continuous incubation
The antibacterial activity against 33 strains is maximized. Radiolite # 600 (manufactured by Showa Kagaku Kogyo Co., Ltd.) is added to the thus obtained culture solution, and the mixture is stirred and filtered to obtain 20 l of a filtrate.

After adjusting the filtrate to pH 8.5 by adding 0.1 N sodium hydroxide, 20 l of ethyl acetate is added and well stirred. After separating the ethyl acetate layer, 5 l of hydrochloric acid solution adjusted to pH 3 is added thereto, and the mixture is stirred well.
After the pH 3 hydrochloric acid aqueous layer was separated, sodium bicarbonate was added to adjust the pH to 8.
After adjusting to 5, add 5 l of ethyl acetate and stir well.
Separate the ethyl acetate layer and add anhydrous sodium sulfate to dehydrate it. Next, the anhydrous sodium sulfate was filtered off, and the ethyl acetate layer was concentrated under reduced pressure to obtain 200
mg is obtained.

Example 2. A small amount of methanol was added to 200 mg of the pale yellow substance obtained in Example 1 to dissolve it, and the mixture was applied on a silica gel 60F ₂₅₄ thin layer plate manufactured by Merck Co., Ltd. in a strip shape, and chloroform: methanol: 28% ammonia water (40:10: 0.2) was used as a developing solvent, thin layer chromatography was performed, and an Rf value of 0.58 was shown. The portion showing the antibacterial activity of Bacillus subtilis ATCC 6633 strain was scraped off, and the scraped silica gel powder was packed in a column and chloroform was added. : Methanol: 28% ammonia water (40: 10: 0.2) was used to elute the antibacterial active substance and then concentrated under reduced pressure to obtain pure antibiotic YS as a colorless powder.
15 mg of -02930K-D substance was obtained.

Example 3. A small amount of methanol was added to 200 mg of the pale yellow substance obtained in Example 1 to dissolve it, and the mixture was applied to a silica gel 60F ₂₅₄ thin layer plate manufactured by Merck Co., Ltd. in a strip shape, and chloroform: methanol: 28% aqueous ammonia (40:10: 0.2) was used as a developing solvent and the Rf value was 0.62. Bacillus subtilis ATCC6633 strain showing antibacterial activity was scraped off, and the scraped silica gel powder was packed in a column and chloroform. : Methanol: 28% ammonia water (40: 40: 0.2) was used to elute the antibacterial active substance and then concentrated under reduced pressure to give pure antibiotic YS as a colorless powder.
10 mg of -02930K-E material was obtained.

Example 4. White dextrin 2.0%, Glucose 0.5%, Polypeptone 0.5%, Yeast extract 0.5%, Brain Heart Infusion 0.52
%, Corn steep liquor 0.5%, meat extract 0.3%, calcium carbonate 0.2% (pH
8.0) was prepared, dispensed 60 ml each into a 500 ml Erlenmeyer flask, sterilized at 120 ° C. for 20 minutes, and grown on Bennett's agar medium.
Spores of YS-02930K strain are scraped off and inoculated, and shake culture is carried out at 27 ° C. for 72 hours to prepare a seed culture solution.

Next, potato starch 3.0%, soybean flour 1.5%, corn steve liquor 0.5%, yeast extract 0.2%, magnesium sulfate heptahydrate 0.05.
%, Sodium chloride 0.3%, cobalt chloride hexahydrate 0.002%, Adekanol (Asahi Denka Co., Ltd.) 0.03% in a medium of 100 l (pH 7.1) in a 150 l stainless steel fermenter. The seed culture was inoculated at a rate of 3.0%. Aeration rate 100l / min, stirring 95-150 rpm /
When the culture is continued for 72 hours at a temperature of 28.0 to 28.5 ° C for 72 minutes, the antibacterial activity against Bacillus subtilis ATCC6633 strain becomes maximum. Radiolite # 600 (manufactured by Showa Kagaku Kogyo Co., Ltd.) is added to the thus obtained culture solution, and the mixture is stirred and filtered to obtain 85 l of a filtrate. After adjusting the pH to 8.5 by adding 0.1 N sodium hydroxide to the filtrate, 85 l of ethyl acetate is added and well stirred. After separating the fermented ethyl acetate layer, 10 liters of hydrochloric acid water adjusted to pH 3 is added and stirred well. After the pH 3 hydrochloric acid aqueous layer was separated, sodium bicarbonate was added to adjust the pH to 8.5, and then 10 l of ethyl acetate was added and stirred well. Separate the ethyl acetate layer and add anhydrous sodium sulfate to dehydrate it. Next, anhydrous sodium sulfate was filtered off, and the ethyl acetate layer was concentrated under reduced pressure to obtain 800 mg of a pale yellow substance.

Example 5. 800 mg of the pale yellow substance obtained in Example 4 is dissolved in 1 ml of a solution of chloroform-methanol-28% aqueous ammonia (50: 1: 0.1). Next, 16 g of Wako Gel C-200 (manufactured by Wako Pure Chemical Industries, Ltd.) was added with chloroform methanol 28% ammonia water (60:
1 ml of a solution containing the sample in a column packed with 1: 0.1)
Column chromatography is carried out using chloroform-methanol-28% aqueous ammonia (50: 1: 0.1) as a developing solvent, and 5 ml of each fraction is fractionated. The eluted fractions were subjected to thin layer chromatography using silica gel 60F ₂₅₄ (manufactured by Merck & Co., Inc.) using chloroform-methanol-28% aqueous ammonia (160: 40: 0.5) as a developing solvent, and a UV ₂₅₄ detector was used. Rf value 0.
62 and Bacillus subtilis ATCC663
Fractions containing substances showing antibacterial activity in 3 strains were collected and concentrated under reduced pressure to obtain pure antibiotic YS-02930 as colorless powder.
20 mg of KH material was obtained.

[0058]

[Brief description of drawings]

Figure 1: Infrared absorption spectrum of YS-02930K-D substance Figure 2: Nuclear magnetic resonance spectrum of the same substance Figure 3: Infrared absorption spectrum of YS-02930K-H substance Figure 4: Nuclear magnetic resonance spectrum of the same substance.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location C12R 1:29)

Claims (2)

[Claims] 1. A micromonospora SP YS-029.
30K strain or antibiotic YS-02930K-D and / or
Or YS-02930K-E and / or YS-0293
A mutant strain thereof having 0K-H producing ability. 2. Micromonospora SP YS-02
The bacterium according to claim 1, which is a 930 K strain (Microtechnical Laboratory Article 1076).