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(xiě)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(chóng)和植物【見(jiàn)下表格1】。諾爾斯菌素的作用機(jī)制是通過(guò)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。抗性基因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(guò)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)行單乙酰化修飾,使得抗生素失活。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(kāi)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(xiě)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。
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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Alshahni et al. (2010) Nourseothricin acetyltransferase: a new dominant selectable marker for the dermatophyte Trichophyton mentagrophytes. Medical Mycology 48: 665
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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】
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關(guān)鍵字: Streptothricin; clonNAT; 選擇性抗生素;諾爾絲菌素; 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致力于生命科學(xué)和生物技術(shù)領(lǐng)域的高科技企業(yè)。公司由在國(guó)內(nèi)科研試劑領(lǐng)域有著十幾年從業(yè)經(jīng)驗(yàn)的專業(yè)技術(shù)團(tuán)隊(duì)和企業(yè)管理團(tuán)隊(duì)組建而成,專門從事以抗體、細(xì)胞因子、免疫檢測(cè)試劑盒等免疫學(xué)產(chǎn)品為主的生物試劑的研發(fā)與銷售。公司代理40余家歐美著名生物技術(shù)公司的相關(guān)產(chǎn)品,能為生命科學(xué)多研究領(lǐng)域的廣大科研人員提供數(shù)萬(wàn)種抗體、數(shù)千種蛋白以及相關(guān)檢測(cè)試劑盒等。