WO2011153872A1 - 一种用于发酵生产环磷酸腺苷的节杆菌及其应用 - Google Patents

一种用于发酵生产环磷酸腺苷的节杆菌及其应用 Download PDF

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WO2011153872A1
WO2011153872A1 PCT/CN2011/073084 CN2011073084W WO2011153872A1 WO 2011153872 A1 WO2011153872 A1 WO 2011153872A1 CN 2011073084 W CN2011073084 W CN 2011073084W WO 2011153872 A1 WO2011153872 A1 WO 2011153872A1
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fermentation
adenosine monophosphate
cyclic adenosine
salt
arthrobacter
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应汉杰
陈晓春
柏建新
熊健
陈勇
谢婧婧
吴菁岚
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南京工业大学
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    • C12PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P19/00Preparation of compounds containing saccharide radicals
    • C12P19/26Preparation of nitrogen-containing carbohydrates
    • C12P19/28N-glycosides
    • C12P19/38Nucleosides
    • C12P19/40Nucleosides having a condensed ring system containing a six-membered ring having two nitrogen atoms in the same ring, e.g. purine nucleosides
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    • C12N1/00Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
    • C12N1/20Bacteria; Culture media therefor
    • C12N1/205Bacterial isolates
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    • C12R2001/00Microorganisms ; Processes using microorganisms
    • C12R2001/01Bacteria or Actinomycetales ; using bacteria or Actinomycetales
    • C12R2001/06Arthrobacter

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  • the present invention belongs to the field of microbial technology and relates to a high-yield ATP and its use. Background technique
  • Cyclic adenosine monophosphate is a physiologically active substance widely present in the human body. As a second messenger in the cell, it plays an important role in the metabolism and synthesis regulation of sugar, fat, nucleic acid, protein and the like.
  • Clinically used for the treatment of angina pectoris, myocardial infarction, myocarditis and cardiogenic shock also has a certain effect on improving symptoms such as palpitations, shortness of breath and chest tightness in rheumatic heart disease; can improve the efficacy of acute leukemia combined with chemotherapy, and can also be used for acute leukemia Induction of remission; in addition, it has a certain effect on chronic bronchitis, various hepatitis and psoriasis in the elderly.
  • Cyclic adenosine monophosphate can also be used as a pharmaceutical intermediate to prepare dibutyryl cyclic adenosine monophosphate and adenosine cyclic adenosine monophosphate, thereby improving fat solubility and thereby exerting physiological and pharmacological effects more effectively. Cyclic adenosine monophosphate can also be used as a food and animal additive to simulate the action of growth hormone under ex vivo conditions, promote the growth of livestock and poultry, and increase the yield of high quality poultry products.
  • the production methods of cyclic adenosine monophosphate include chemical synthesis method, enzymatic method and fermentation method. All domestic and international industrial production uses chemical synthesis method, using adenosine monophosphate as raw material, and using high-efficiency separation column for intermediate separation. This method has large solvent loss, low yield, high cost, small output, and serious environmental pollution. Enzymatic method can efficiently catalyze the production of cyclic adenosine monophosphate by adenosine triphosphate, but this method is limited to the laboratory stage and has a certain distance from industrialization.
  • Suzuki reported that using the hydrocarbon assimilation strain, Arthrosporium rosenbergii ATCC15584 strain, fermented 1.4 g/L cyclic adenosine monophosphate with n-tetradecane as a carbon source.
  • ion implantation technology has achieved some important research results in mutation breeding, plant genetic transformation, life origin and evolution, and environmental radiation and human health.
  • ion implantation has been widely used for micro-generation.
  • the mutagenic breeding of the species has achieved good results.
  • ion implantation has the effects of energy deposition, mass transfer, mass deposition and charge neutralization and exchange. It is a comprehensive temptation that combines physical mutagenesis and chemical mutagenicity.
  • the method can change the physiological and biochemical properties of biological cells under low dose injection and light cell damage, resulting in the change of basic unit-base of genetic material, and induce chromosome structure variation (Yu Zengliang, Physics, 1997) , 26 ( 6 ): 333-338 ). Zhao Hongying (Journal of Tianjin University of Technology, 2001, 17 (1): 14- 17). The mature spores of gentamicin-producing bacteria were injected with N + ions, and the antibiotic-producing ability of the strains obtained by screening was increased by 27.39%.
  • the technical problem to be solved by the present invention is to provide a high-yield fermentation of a cyclic adenosine monophosphate.
  • An Arthrobacter for fermentative production of cyclic adenosine monophosphate the preservation number of which is CGMCC ⁇ 3584.
  • the classification of the high-yield cyclic adenosine adenosine as a production strain is named Arthrobacter sp. A302.
  • CGMCC General Microbiology Center of the China Microbial Culture Collection Management Committee
  • the strain is subjected to low-energy ion beam implantation on the soil-selected Arthrobacter, and then the mutagenized strain is transferred to a plate medium for cultivation, and the single colony is selected and transferred to the beef paste slant culture, followed by the carbon source, The liquid seed culture medium and the fermentation medium of the nitrogen source, the inorganic salt and the water are cultured to thereby select the high-yield cyclic adenosine monophosphate.
  • the CGMCC No. 3584 strain has the following properties:
  • the colony On solid medium, the colony is round, moist, low-protruding, smooth surface, diameter is about 1.5-2mm; shiny, colony is yellow, young bacteria are light yellow, and the colony is dark yellow as the age of the bacteria increases .
  • Physiological and biochemical characteristics :
  • the strain is obligate aerobic bacteria, anaerobic conditions do not grow; oxidase reaction is negative, contact enzyme reaction is positive, nitrate reduction reaction is positive; the optimal growth temperature of the bacteria is 30 ° C, the optimum pH value 7.0, can be grown at pH 10.0; the optimum NaCl concentration is 1% (mass ratio), can also grow when the NaCl concentration is 5% (mass ratio); heat resistance (55 ° C, heating for 20 minutes) .
  • the 16S rDNA sequence of the CGMCC No. 3584 strain has been registered in the GenBank database under the accession number GQ141738. The sequence was compared with the related species in the GenBank database to construct a developmental tree with the full 16S rDNA sequence as the basis system. The results showed that the strain A302 and the bacterium (Arthrobacter had a homology of 99%), and thus the strain obtained by the present invention was identified as Arthrobacter, that is, Arthrobacter sp. A302 (CGMCC No. 3584).
  • the bacteria can utilize glucose, inositol, sorbitol, xylose, mannitol, maltose, sucrose, raffinose, lactose, rhamnose; hydrolyzed urea, does not produce H 2 S; ⁇ reaction is negative; hydrolyzable starch, Does not hydrolyze gelatin.
  • the present invention also provides the use of the above-mentioned Arthrobacter in improving the production of cyclic adenosine monophosphate.
  • the present invention further provides a fermentation process for producing cyclic adenosine monophosphate, which comprises fermenting in a liquid fermentation medium using the above-described Arthrobacter.
  • the liquid seed medium may comprise: a carbon source of 1 to 100 g/L, preferably 10 to 30 g/L; a nitrogen source of 1 to 100 g/L, preferably 10 to 30 g/L;
  • the salt is 0.01 ⁇ 100 g/L, preferably l ⁇ 10 g/L; the rest is water.
  • the liquid fermentation medium may comprise: a carbon source of l ⁇ 100 g/L, preferably 30-50 g/L; a nitrogen source of 1-100 g/L, preferably 10-30 g/L; and an inorganic salt of 0.01-100 g/ L, preferably 10-20 g/L; the balance is water.
  • the carbon source may be selected from one or more of glucose, xylose, fructose and glycerol;
  • the nitrogen source may be selected from the group consisting of beef cream, peptone, yeast extract, corn syrup, bean cake powder, urea and ammonium sulfate.
  • the inorganic salt may be selected from one or more of a potassium salt, a sodium salt, a phosphate salt, a hydrochloride salt and a acid salt.
  • the initial pH of the liquid fermentation medium may range from 4.5 to 9.5, preferably from 6 to 8.
  • the fermentation temperature may be 25 to 37 ° C, preferably 30 to 35 ° C; the fermentation time may be 24 to 120 hours, preferably 60 to 100 hours.
  • the inoculation amount is 1 to 30:100, preferably 8 to 12:100.
  • Advantageous effects of the present invention include: 1. Compared with traditional radiation methods and chemical mutagens, ion beam mutagenesis has the characteristics of light damage, high mutation rate, wide mutation spectrum, genetic stability, and easy to obtain ideal new varieties.
  • the adenosine monophosphate A302 (CGMCC No. 3584) of the present invention has the characteristics of high yield trait stability, and the performance of the production of cyclic phosphoric acid is stable after 10 generations of the strain.
  • the adenosine monophosphate A302 (CGMCC No. 3584) of the present invention is capable of producing cyclic adenosine monophosphate by fermentation using various carbon sources and nitrogen sources, and is easy to handle. Preservation of biological materials
  • Arthrobacter sp. A302 has been deposited with the General Microbiology Center of China Microbial Culture Collection Management Committee (CGMCC) on January 18, 2010. The address of the depository is: Datun Road, Chaoyang District, Beijing, Institute of Microbiology, Chinese Academy of Sciences The deposit number is CGMCC No. 3584.
  • CGMCC General Microbiology Center of China Microbial Culture Collection Management Committee
  • the strain producing cyclic adenosine monophosphate isolated from soil is the starting strain and will be mutagenized by N + ion beam (the vacuum of the low energy ion implanter target chamber is 2 X 10 4 , the implantation energy is 20 keV, and the dose is 5 K.
  • N + ion beam the vacuum of the low energy ion implanter target chamber is 2 X 10 4 , the implantation energy is 20 keV, and the dose is 5 K.
  • the spore suspension of ions.cm-s- 1 was diluted 100 times with sterile water, 0.1 ml was applied to the beef paste plate medium and cultured at 30 ° C for 3 days, and a single colony was selected from the beef paste bevel. Cultivate for 2 days.
  • Strain A302 was transferred from the beef paste slant to a 30 mL liquid seed medium (glucose 20 g/L, peptone 8 g/L, yeast extract 5 g/L, beef extract 15 g/L, NaCl 3 g/ In a 500 mL shake flask of L), incubate at 30 ° C for 250 hours at 250 rpm on a shaker.
  • Strain A302 was transferred from the beef paste slant to a 30 mL liquid seed medium (glucose 10 g/L, peptone 3 g/L, yeast extract 4 g/L, beef extract 10 g/L, NaCl 3 g/ In a 500 mL shake flask of L), incubate at 30 ° C for 250 hours at 250 rpm on a shaker.
  • the strain A302 was continuously transferred for 10 passages, and fermentation culture was carried out under the culture conditions of Example 3 to produce cyclic adenosine monophosphate.
  • the results showed that (see Tables 1 and 2), for 10 consecutive generations of genetic culture, the performance of strain A302 for the production of cyclic adenosine monophosphate was stable.
  • Table 1 Production of cyclic ATP production of strain A302 with continuous transmission for 1 to 5 generations Genetical algebra 1 2 3 4 5 cAMP ( g/L ) 3.67 3.52 3.66 3.53 3.58
  • Table 2 Production cycle of strain A302 with continuous transmission of 6 to 10 generations

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Description

一种用于发酵生产环磷酸腺苷的节杆菌及其应用 技术领域
本发明属于微生物技术领域, 涉及一种高产环磷酸腺苷节杆菌及其应 用。 背景技术
环磷酸腺苷是人体内广泛存在的一种具有生理活性的重要物质, 作为 细胞内的第二信使, 它对糖、 脂肪、 核酸、 蛋白质等的代谢以及合成调节 起着重要的作用。 临床上用于治疗心绞痛、 心肌梗死、 心肌炎及心源性休 克; 对改善风湿性心脏病的心悸、 气急、 胸闷等症状也有一定的作用; 可 提高急性白血病结合化疗的疗效,亦可用于急性白血病的诱导緩解;此外, 对老年慢性支气管炎、 各种肝炎和银屑病也有一定疗效。 环磷酸腺苷也可 作为药物中间体制备二丁酰环磷酸腺苷和环磷酸腺苷葡曱胺, 提高脂溶 性, 从而更有效地发挥生理及药理作用。 环磷酸腺苷亦可用于畜禽食品添 加剂, 在离体条件下模拟生长激素的作用, 促进畜禽生长, 增加优质禽产 品产量。
环磷酸腺苷的生产方法有化学合成法、 酶法和发酵法三种。 国内外产 业化生产全部采用化学合成法, 以一磷酸腺苷为原料, 采用高效分离柱进 行中间体分离, 该方法溶剂损耗量大, 收率低, 成本高, 产量小, 且环境 污染严重。 利用酶法可以高效地催化三磷酸腺苷生成环磷酸腺苷, 但是此 方法仅仅局限于实验室阶段, 离产业化还有一定的距离。
目前, 国内还没有发酵法制备环磷酸腺苷的报道。 在国外, 1963年马 克曼等在大肠杆菌 Crookes株细胞中最早检出了 1.1纳克 /毫升的环磷酸腺 苷。 1971年, 石山等分离筛选了某种小杆菌 NO.205 ATCC21376以及数株 属于榜状杆菌科的细菌, 通过化学诱变成抗药性突变株后, 可从葡萄糖直 接发酵生成 2g/L以上的环磷酸腺苷。 1973年, 铃木报道, 利用烃同化菌 玫瑰色石蜡节杆菌 ATCC15584 菌株, 能以正十四烷为碳源, 发酵积累 1.4g/L环磷酸腺苷。
离子注入技术作为一种生物品种改良的新技术已在诱变育种、 植物转 基因、 生命起源和进化以及环境辐射与人类健康等方面取得了一些重要研 究成果。 其中, 在微生物诱变育种的研究中, 离子注入已广泛用于对微生 物菌种的诱变育种, 并取得了良好效果。 离子注入与传统诱变源相比, 除 了具有能量沉积效应外,还有动量传递、质量沉积及电荷中和与交换效应, 是一种将物理诱变和化学诱变特性集于一身的综合诱变方法, 能够在低剂 量注入、 细胞损伤较轻的情况下, 强烈地影响生物细胞的生理、生化性能, 造成遗传物质的基本单位-碱基的改变, 诱发染色体结构变异(余增亮, 物 理, 1997 , 26 ( 6 ): 333-338 )。 赵洪英(天津理工学院学报, 2001 , 17 ( 1 ): 14- 17 ) 等用 N +离子注入庆大霉素产生菌的成熟孢子, 经筛选得到的菌株 产抗生素能力提高 27.39%。 王纪(微生物学杂志, 1998 , 18 ( 4 ): 25-28 ) 等通过离子注入诱变筛选得到一株遗传性能稳定的高产菌, 得率较出发菌 提高 55% ~ 60%。 姚建铭 (生物工程学报, 2000 ( 16 ): 478-481 ) 等应用 离子注入诱变筛选得到高产花生四烯酸的一株菌株, 并应用于大规模生 产, 其产量比国外专利报道高 1倍。 发明内容
因此, 本发明所要解决的技术问题是提供一株环磷酸腺苷的高产发 酵。
为解决上述技术问题, 本发明采用的技术方案如下:
一种用于发酵生产环磷酸腺苷的节杆菌, 该节杆菌的保藏编号为 CGMCC Νο·3584。
这种作为生产菌株的高产环磷酸腺苷的节杆菌的分类命名为节杆菌 ( Arthrobacter sp. ) A302 , 目前该菌株已保藏于中国微生物菌种保藏管理 委员会普通微生物中心(筒称 CGMCC ), 保藏单位地址: 北京市朝阳区大 屯路, 中国科学院微生物研究所, 保藏编号为 CGMCC No. 3584 , 保藏日 期为 2010年 1月 18 日。该菌株是通过对土壤筛选到的节杆菌进行低能离 子束注入, 然后将诱变后的菌株转接于平板培养基中培养, 挑选单菌落转 接于牛肉膏斜面培养, 后经含碳源、 氮源、 无机盐和水的液体种子培养基 和发酵培养基培养从而筛选出的环磷酸腺苷高产菌。
CGMCC No. 3584菌株具有下述性质:
1、 菌落形态学特征:
在固体培养基上菌落呈圓形, 湿润, 低凸起, 表面光滑, 直径为约 1.5-2mm; 有光泽, 菌落呈黄色, 幼龄菌为浅黄色, 随着菌龄增加, 菌落 呈深黄色。 2、 生理与生化特性:
菌株为专性好氧菌, 厌氧条件不生长; 氧化酶反应为阴性, 接触酶反 应为阳性, 硝酸盐还原反应为阳性; 该菌的最佳生长温度为 30°C , 最适 pH值为 7.0, 可在 pH 10.0下生长; 最适的 NaCl浓度为 1% (质量比), 在 NaCl浓度为 5% (质量比)时也能生长; 有耐热性( 55°C , 加热 20分钟)。
3、 16SrDNA序列分析:
CGMCC No.3584菌株的 16S rDNA序列已在 GenBank数据库登记, 登记号为 GQ141738。将所测序列与 GenBank数据库中的相关种进行比较, 构建 16S rDNA全序列为基础系统的发育树。 结果表明: 菌株 A302与节 杆菌 (Arthrobacter 的同源性达到 99%, 因此认定本发明得到的菌株为节 杆菌, 即节杆菌 A302 ( CGMCCNo.3584 )。
4、 营养特征:
该菌能利用葡萄糖、 肌醇、 山梨醇、 木糖、 甘露醇、 麦芽糖、 蔗糖、 棉籽糖、 乳糖、 鼠李糖; 水解尿素, 不产生 H2S; 吲哚反应为阴性; 可水 解淀粉, 不水解明胶。
本发明还提供了上述节杆菌在提高发酵生产环磷酸腺苷的产量中的 应用。
本发明又提供了一种生产环磷酸腺苷的发酵方法, 该方法包括采用上 述节杆菌在液体发酵培养基中发酵。
在上述发酵方法中, 液体种子培养基可以包含: 碳源 1~100 g/L, 优 选为 10~30 g/L; 氮源 l~100 g/L, 优选为 10~30 g/L; 无机盐 0.01~100 g/L, 优选为 l~10 g/L; 其余为水。 液体发酵培养基可以包含: 碳源 l~100 g/L, 优选为 30-50 g/L;氮源 1-100 g/L,优选为 10-30 g/L;无机盐 0.01-100 g/L, 优选为 10~20 g/L; 其余为水。 其中, 碳源可以选自葡萄糖、 木糖、 果糖 和甘油中的一种或多种; 氮源可以选自牛肉膏、 蛋白胨、 酵母膏、 玉米浆、 豆饼粉、 尿素和硫酸铵中的一种或多种; 无机盐可以选自钾盐、 钠盐、 磷 酸盐、 盐酸盐和克酸盐中的一种或多种。 液体发酵培养基的初始 pH可以 为 4.5-9.5, 优选为 6-8
在上述发酵方法中, 发酵温度可以为 25~37°C, 优选为 30~35°C; 发 酵时间可以为 24~120小时, 优选为 60~100小时。 其中, 发酵前按照体积 比为 1~30: 100, 优选为 8~12: 100的接种量接种。
本发明的有益效果包括: 1. 与传统的辐射法及化学诱变剂相比, 离子束诱变具有损伤轻、 突变 率高、 突变谱广、 遗传稳定、 易于获得理想新品种等特点。
2. 本发明的环磷酸腺苷高产菌节杆菌 A302 ( CGMCC No. 3584 ), 具 有高产性状稳定的特点, 该菌株经过 10代以上传代, 生产环磷酸酸的性 能保持稳定。
3. 本发明的环磷酸腺苷高产菌节杆菌 A302 ( CGMCC No. 3584 )能够 利用多种碳源和氮源发酵生产环磷酸腺苷, 操作方便筒单。 生物材料的保藏
节杆菌 Arthrobacter sp. ) A302已经于 2010年 1月 18 日保藏于中国 微生物菌种保藏管理委员会普通微生物中心(筒称 CGMCC ),保藏单位地 址:北京市朝阳区大屯路, 中国科学院微生物研究所,保藏编号为 CGMCC No. 3584。
实施发明的最佳方式
下面结合具体实施方式对本发明进行进一步的详细描述, 根据下述实 施例可以更好地理解本发明。 然而, 本领域技术人员应容易理解的是, 实 施例所描述的具体物料配比、 工艺条件及其结果仅用于说明本发明, 而不 应当也不会限制权利要求书所涵盖的本发明的范围。 实施例 1
以从土壤中分离得到的产环磷酸腺苷的菌株为出发菌株,将经 N+离子 束诱变 (低能离子注入机靶室内真空度为 2 X 10 4, 注入能量为 20kev, 剂 量为 5 K ions.cm- s-1)后的孢子悬浮液经无菌水稀释 100倍后,取 0.1 ml 涂布于牛肉膏平板培养基上 30°C下培养 3天,从中挑选单菌落在牛肉膏斜 面培养 2天。 转接一环于装有 30mL液体种子培养基(葡萄糖 10 g/L, 蛋 白胨 10 g/L, 酵母膏 5 g/L, 牛肉膏 10 g/L, NaCl 3 g/L )的 500mL摇瓶中, 于 30°C下 250rpm摇床培养 20小时。 再转接 4mL于装有 40mL液体发酵 培养基(葡萄糖 50 g/L, K2HP04 10 g/L, KH2P04 10 g/L , MgS04 1 g/L, 尿素 5 g/L, 蛋白胨 5 g/L ) 的 500mL摇瓶中, 于 30°C下 280rpm摇床发酵 培养 72小时。 经过初筛, 得到 88株比出发菌株产量高的突变株。 用同样 的条件下进行复筛, 最终得到产量最高的菌株 A302 , 环磷酸苷产量最高 产量达到 2.4g/L, 比原始菌株的 1.2g/L提高 2倍。 实施例 2
将菌株 A302从牛肉膏斜面转接一环于装有 30mL液体种子培养基(葡 萄糖 20 g/L, 蛋白胨 8 g/L, 酵母膏 5 g/L, 牛肉膏 15 g/L, NaCl 3 g/L ) 的 500mL摇瓶中,于 30°C下 250 rpm摇床培养 20小时。转接 4mL于装有 40mL 液体发酵培养基 (葡萄糖 40 g/L, K2HP04 10 g/L, KH2P04 5 g/L, MgS04 4 g/L, 尿素 8 g/L, 蛋白胨 5 g/L ) 的 500mL摇瓶中, 于 32°C下 260rpm摇 床发酵培养 72小时。 环磷酸苷产量达到 2.0g/L。 实施例 3
将菌株 A302从牛肉膏斜面转接一环于装有 30mL液体种子培养基(葡 萄糖 10 g/L, 蛋白胨 3 g/L, 酵母膏 4 g/L, 牛肉膏 10 g/L, NaCl 3 g/L ) 的 500mL摇瓶中,于 30°C下 250 rpm摇床培养 20小时。转接 4mL于装有 40mL 液体发酵培养基 (葡萄糖 45 g/L, K2HP04 5 g/L, KH2P04 10 g/L, MgS04 0.5 g/L, 尿素 3 g/L, 蛋白胨 5 g/L ) 的 500mL摇瓶中, 于 30°C下 300rpm 摇床发酵培养 72小时。 环磷酸苷产量达到 3.6g/L。 实施例 4
将菌株 A302连续传 10代, 在实施例 3的培养条件下进行发酵培养, 生产环磷酸腺苷。结果表明(见表 1和 2 ),连续 10代遗传培养,菌株 A302 生产环磷酸腺苷的性能稳定。 表 1 连续传 1~5代的菌株 A302的生产环磷酸腺苷性能 遗传代数 1 2 3 4 5 cAMP ( g/L ) 3.67 3.52 3.66 3.53 3.58 表 2 连续传 6~10代的菌株 A302的生产环磷酸腺苷性能 遗传代数 6 7 8 9 10 cAMP ( g/L ) 3.64 3.71 3.68 3.66 3.65

Claims

权 利 要 求
1. 一种用于发酵生产环磷酸腺苷的节杆菌, 该节杆菌的保藏编号为 CGMCC Νο·3584。
2. 根据权利要求 1 所述的节杆菌在提高发酵生产环磷酸腺苷的产量 中的应用。
3. 一种生产环磷酸腺苷的发酵方法, 该方法包括采用根据权利要求 1 所述的节杆菌在液体发酵培养基中发酵。
4. 根据权利要求 3所述的方法, 其特征在于, 所述发酵的液体种子培 养基包含: 碳源 1~100 g/L, 优选为 10~30 g/L; 氮源 1~100 g/L, 优选为 10-30 g/L; 无机盐 0.01~100 g/L, 优选为 1~10 g/L; 其余为水。
5. 根据权利要求 4所述的方法, 其特征在于, 所述发酵的液体发酵培 养基包含: 碳源 1~100 g/L, 优选为 30~50 g/L; 氮源 1~100 g/L, 优选为 10-30 g/L; 无机盐 0.01~100 g/L, 优选为 10~20 g/L; 其余为水。
6. 根据权利要求 4或 5所述的方法, 其特征在于, 所述碳源选自葡萄 糖、 木糖、 果糖和甘油中的一种或多种。
7. 根据权利要求 4至 6中任一项所述的方法, 其特征在于, 所述氮源 选自牛肉膏、 蛋白胨、 酵母膏、 玉米浆、 豆饼粉、 尿素和硫酸铵中的一种 或多种。
8. 根据权利要求 3至 7中任一项所述的方法, 其特征在于, 所述无机 盐选自钾盐、 钠盐、 磷酸盐、 盐酸盐和硫酸盐中的一种或多种。
9. 根据权利要求 3至 8中任一项所述的方法, 其特征在于, 所述液体 发酵培养基的初始 pH为 4.5~9.5 , 优选为 6~8。
10. 根据权利要求 3至 9中任一项所述的方法, 其特征在于, 所述发 酵温度为 25~37°C , 优选为 30~35 °C ; 发酵时间为 24~120 小时, 优选为 60-100小时。
11. 根据权利要求 3至 10中任一项所述的方法, 其特征在于, 所述发 酵前按照体积比为 1~30: 100, 优选为 8~12: 100的接种量接种。
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CN103320373B (zh) * 2013-06-20 2015-09-23 南京工业大学 一株过表达次黄嘌呤磷酸核糖转移酶基因的节杆菌及其构建方法与应用
CN103571779B (zh) * 2013-11-04 2016-10-26 河南科技学院 一种发酵生产环磷腺苷的发酵培养基、菌株及生产方法
CN104962574B (zh) * 2015-06-10 2017-11-24 南京工业大学 一种节杆菌表达质粒与应用
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