Nourseothricin (NTC) Sulfate 硫酸諾爾斯菌素
— 分子遺傳學(xué)優(yōu)越的篩選性抗生素
搜索關(guān)鍵詞:
鏈絲菌素 Streptothricin; clonNAT; 選擇性抗生素;革蘭氏陽(yáng)性和陰性菌; 酵母菌和絲狀真菌;植物; sat1基因; nat1基因;CAS:96736-11-7
諾爾斯菌素(Nourseothricin,縮寫NTC),英文同義名Streptothricin和clonNAT,由諾爾斯氏鏈霉菌( Streptomyces noursei)代謝產(chǎn)生的一種廣譜型抗生素,因結(jié)構(gòu)上具鏈絲菌素(Streptothricin,STs)化學(xué)基團(tuán),故歸屬于此類抗生素亞家族。天然產(chǎn)物提取的諾爾斯菌素(Nourseothricin)一般為ST-F和ST-D的混合物,具有極其寬廣的抑制生長(zhǎng)活性,原核生物如細(xì)菌;真核生物如包括白色念球菌在內(nèi)的各種酵母菌、絲狀真菌、原生生物、昆蟲和植物【見下表格1】。諾爾斯菌素的作用機(jī)制是通過誘導(dǎo)mRNA錯(cuò)誤編碼,來(lái)抑制蛋白合成。
基于以上特性,諾爾斯菌素(Nourseothricin)是基因重組工程研究中非常優(yōu)秀的選擇性抗生素??剐曰?strong>nat1最初從S. noursei分離所得,此基因能編碼表達(dá)諾爾斯菌素N-乙酰轉(zhuǎn)移酶,通過對(duì)諾爾斯菌素(NTC)上與糖基部分相連的ß-賴氨酸上的ß-氨基基團(tuán)進(jìn)行單乙?;揎棧沟每股厥Щ?。研究發(fā)現(xiàn),nat1基因在多種異質(zhì)體系內(nèi)發(fā)揮作用,使其在分子遺傳學(xué)中是非常有價(jià)值的選擇性工具。后面陸續(xù)發(fā)現(xiàn)具相同抗性機(jī)理的基因有:來(lái)自大腸桿菌E. Coli的基因stat1,stat2,stat3;來(lái)自鏈霉菌S. lavendulae的stat基因。另外,還有來(lái)自鏈霉菌S. albulus的新型sttH基因,作用機(jī)制不同,抗性在于編碼表達(dá)異分支酸類型水解酶,能打開streptolidine內(nèi)酰胺環(huán)上的酰胺鍵,將其轉(zhuǎn)化成無(wú)活性的酸性產(chǎn)物。sttH基因抗性似乎只對(duì)酵母菌有活性,對(duì)細(xì)菌無(wú)效。
諾爾斯菌素(Nourseothricin,縮寫NTC)具有以下應(yīng)用優(yōu)勢(shì):
- 粉末或者液體的穩(wěn)定性非常高。粉末+4℃保存10年有效,+20℃保存2年有效。
- 粉末具非常高的水溶性(1g/L);
- 具非常低或幾乎無(wú)背景抗性:因抗性蛋白僅在細(xì)胞內(nèi)表達(dá),不會(huì)在細(xì)胞培養(yǎng)基內(nèi)被降解。
- 不會(huì)與大量其他抗生素,如氨基糖苷類抗生素潮霉素B或遺傳霉素G418發(fā)生交叉反應(yīng)。
- 不能用作診療抗生素,對(duì)臨床上治療的細(xì)菌微生物呈現(xiàn)出極弱抗性。因此與診療抗生素交叉反應(yīng)很小。
- 特別適用于酵母分子生物學(xué)研究。不像一些營(yíng)養(yǎng)缺陷型選擇性基因,諾爾斯菌素抗性不會(huì)影響酵母正常生長(zhǎng),能用于工程菌,或者缺少營(yíng)養(yǎng)性篩選基因表達(dá)的野生菌。
NTC使用方法和推薦濃度:
儲(chǔ)存液配制:稱量1000mg諾爾斯菌素溶解于5ml去離子水充分溶解后,用0.22µm濾膜過濾除菌,即制備200mg/ml儲(chǔ)存液,本溶液置于+4℃保存,至少4周穩(wěn)定,不會(huì)有任何可見的活力損失。長(zhǎng)期保存,分裝凍存于-20℃.
建議篩選濃度:諾爾斯菌素在相對(duì)較低的濃度下即可有效用于重組工程菌的篩選,大多數(shù)有機(jī)體的篩選濃度多在50-200µg/ml區(qū)間內(nèi)。具體可參考下表1。
產(chǎn)品訂購(gòu)信息:【美國(guó)進(jìn)口分裝,現(xiàn)貨供應(yīng)】
Nourseothricin (NTC) Sulfate 硫酸諾爾斯菌素
Nourseothricin (NTC) Sulfate 硫酸諾爾斯菌素
Nourseothricin (NTC) Sulfate 硫酸諾爾斯菌素
Nourseothricin (NTC) Sulfate 硫酸諾爾斯菌素
另提供美國(guó)Cayman公司,原裝進(jìn)口的Nourseothricin (NTC) Sulfate 硫酸諾爾斯菌素,CAS:96736-11-7,貨期:3-4周
Nourseothricin (NTC) Sulfate 硫酸諾爾斯菌素
Nourseothricin (NTC) Sulfate 硫酸諾爾斯菌素
Nourseothricin (NTC) Sulfate 硫酸諾爾斯菌素
相關(guān)產(chǎn)品:
Blasticidin S (10 mg/ml)
殺稻瘟菌素S (滅瘟素)(10 mg/ml)
Zeocin (100mg/ml) 鹽酸博萊霉素(100 mg/ml)
Zeocin (100mg/ml) 鹽酸博萊霉素(100 mg/ml)
G418 Sulfate (Geneticin) 遺傳霉素
G418 Sulfate (Geneticin) 遺傳霉素
Puromycin Dihydrochloride嘌呤霉素鹽酸鹽
Puromycin Dihydrochloride嘌呤霉素鹽酸鹽
Puromycin Dihydrochloride嘌呤霉素鹽酸鹽
表1 諾爾斯菌素(NTC)最低抑制濃度和選擇性濃度列表
Gram-negative bacteria
革蘭氏陽(yáng)性菌
Agrobacterium tumefaciens
Gram-positive bacteria
革蘭氏陰性菌
Schizosaccharomyces pombe
Trichophyton mentagrophytes
Leishmania tarentolae, major etc.
Phaeodactylum tricornutum
* MIC: Minimal inhibitory concentration ** IC50: Concentration inhibiting growth by 50%
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Djouani-Tahri et al. (2011) A eukaryotic LOV-histidine kinase with circadian clock function in the picoalga Ostreococcus. Plant Journal 65: 578
Dubey et al. (2013) Role of the methylcitrate cycle in growth, antagonism and induction of systemic defence responses in the fungal biocontrol agent Trichoderma atroviride. Microbiology 159: 2492 9
Dubey et al. (2014) Hydrophobins are required for conidial hydrophobicity and plant root colonization in the fungal biocontrol agent Clonostachys rosea. BMC Microbiology 14:18 El-Khoury et al. (2008) Gene deletion and allelic replacement in the filamentous fungus Podospora anserina. Curr. Genet. 53: 249
Gassel et al. 2014 Genetic engineering of the complete carotenoid pathway towards enhanced astaxanthin formation in Xanthophyllomyces dendrorhous starting from a high-yield mutant. Appl. Microbiol. Biotechnol. 98: 345
Giner-Lamia et al. (2015) CopM is a novel copper-binding protein involved in copper resistance in Synechocystis sp. PCC 6803. MicrobiologyOpen 4:167
Goarin et al. (2015) Gene replacement in Penicillium roqueforti. Current Genetics 61: 203
Gold et al. (1994) Three selectable markers for transformation of Ustilago maydis. Gene 142: 225 Goldstein et al. (1999) Three New Dominant Drug Resistance Cassettes for Gene Disruption in Saccharomyces cerevisiae. Yeast 15: 1541
Goyard et al. 2014 In vivo imaging of trypanosomes for a better assessment of host–parasite relationships and drug efficacy. Parasitol. Int. 63: 260–268
Hamano et al. (2006) A Novel Enzyme Conferring Streptothricin Resistance Alters the Toxicity of Streptothricin D from Broadspectrum to Bacteria-specific. J. Biol. Chem. 281: 16842
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— —Written/Edited by V. Shallan【版權(quán)歸MKBio懋康所有】
上海懋康生物科技有限公司是一家涉足于生命科學(xué)和生物技術(shù)領(lǐng)域研究的試劑、儀器和實(shí)驗(yàn)室消耗品與實(shí)驗(yàn)服務(wù)工作,主要從事細(xì)胞生物學(xué)、植物學(xué)、分子生物學(xué)、免疫學(xué)、生物化學(xué)、蛋白組學(xué)。生物制藥與診斷試劑研發(fā)生產(chǎn)等領(lǐng)域。 本公司秉承“以人為本,以誠(chéng)為信、合同守信”的經(jīng)營(yíng)理念。堅(jiān)持"品質(zhì)保障"的原則為廣大客戶提供優(yōu)質(zhì)產(chǎn)品。
關(guān)鍵字: 鏈絲菌素 Streptothricin; clonNAT; 選擇性抗生素;革蘭氏陽(yáng)性和陰性菌; 酵母菌和絲狀真菌;植物; sat1基因; nat1基因;CAS:96736-11-7
上海懋康生物科技有限公司是一家涉足于生命科學(xué)和生物技術(shù)領(lǐng)域研究的試劑、儀器和實(shí)驗(yàn)室消耗品與實(shí)驗(yàn)服務(wù)工作,主要從事細(xì)胞生物學(xué)、植物學(xué)、分子生物學(xué)、免疫學(xué)、生物化學(xué)、蛋白組學(xué)。生物制藥與診斷試劑研發(fā)生產(chǎn)等領(lǐng)域。 本公司秉承“以人為本,以誠(chéng)為信、合同守信”的經(jīng)營(yíng)理念。堅(jiān)持"品質(zhì)保障"的原則為廣大客戶提供優(yōu)質(zhì)產(chǎn)品。