白念珠菌CaGUA1基因的功能研究
發(fā)布時間:2018-08-28 12:23
【摘要】: 鳥嘌呤核苷酸參與細(xì)胞內(nèi)許多重要的生命過程,對DNA復(fù)制、mRNA轉(zhuǎn)錄和GTP蛋白介導(dǎo)的信號傳導(dǎo)途徑等重要的細(xì)胞活動起到關(guān)鍵作用。白念珠菌CaGUA1基因(orf19.4813,orf19.12276 )的ORF全長1593bp,編碼一個含530個氨基酸殘基的蛋白,該蛋白與ScGUA1編碼蛋白有84%同源性。本實驗中,我們使用了一種名為“URA-BLASTER”的基因敲除方法構(gòu)建了白念珠菌CaGUA1基因的缺失株(gua1△/gua1△),該缺失株在無外源鳥嘌呤時無法存活。然后我們將CaGUA1基因克隆到白念珠菌的表達(dá)載體pCR4中,接著我們將該基因克隆轉(zhuǎn)化到CaGUA1基因的缺失株中。含有pCR4-CaGUA1的缺失株在沒有外源鳥嘌呤的條件下可以正常生長,表明CaGUA1基因是白念珠菌的鳥嘌呤合成途徑中的必需基因。
[Abstract]:Guanine nucleotides are involved in many important cellular processes and play a key role in the transcription of DNA replication mRNA and the signaling pathway mediated by GTP protein. The ORF of CaGUA1 gene (orf19.4813,orf19.12276) of Candida albicans is 1593bp. it encodes a protein containing 530 amino acid residues. The protein shares 84% homology with the protein encoded by ScGUA1. In this study, we used a gene knockout method called "URA-BLASTER" to construct a CaGUA1 deletion strain of Candida albicans (gua1 / gua1), which could not survive without exogenous guanine. Then we cloned the CaGUA1 gene into the expression vector pCR4 of Candida albicans, and then we cloned the gene into the missing strain of CaGUA1 gene. The deletion strain containing pCR4-CaGUA1 can grow normally without exogenous guanine, indicating that CaGUA1 gene is an essential gene in the guanine synthesis pathway of Candida albicans.
【學(xué)位授予單位】:天津大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2008
【分類號】:R378
本文編號:2209386
[Abstract]:Guanine nucleotides are involved in many important cellular processes and play a key role in the transcription of DNA replication mRNA and the signaling pathway mediated by GTP protein. The ORF of CaGUA1 gene (orf19.4813,orf19.12276) of Candida albicans is 1593bp. it encodes a protein containing 530 amino acid residues. The protein shares 84% homology with the protein encoded by ScGUA1. In this study, we used a gene knockout method called "URA-BLASTER" to construct a CaGUA1 deletion strain of Candida albicans (gua1 / gua1), which could not survive without exogenous guanine. Then we cloned the CaGUA1 gene into the expression vector pCR4 of Candida albicans, and then we cloned the gene into the missing strain of CaGUA1 gene. The deletion strain containing pCR4-CaGUA1 can grow normally without exogenous guanine, indicating that CaGUA1 gene is an essential gene in the guanine synthesis pathway of Candida albicans.
【學(xué)位授予單位】:天津大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2008
【分類號】:R378
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