Nourseothricin (NTC) Sulfate 硫酸諾爾斯菌素/諾爾絲菌素
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
產(chǎn)品信息:
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
基本描述
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??剐曰騨at1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):
1)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。
2)粉末具非常高的水溶性(1g/L);
3)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。
4)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)。
5)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。
6)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。
產(chǎn)品特性
1)CAS NO:96736-11-7
2)英文同義名:Nourseothricin Sulfate; NTC Sulfate; Streptothricin Sulfate; clonNAT;
3)中文同義名:硫酸諾爾絲菌素;硫酸鏈絲菌素;鏈絲菌素硫酸鹽;
4)分子式:C31H58N12O10· C19H34N8O8· H2SO4
5)分子量:1359.47 g/mol
6)純度(ST-F&D):>85%(HPLC)
7)純度(ST-C&E):<15%(HPLC)
8)外觀:米黃色粉末
9)溶解性:易溶于水(200 mg/ml)
10)化學(xué)結(jié)構(gòu):
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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【見超鏈接】
參考文獻(xiàn):
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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: 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
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