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首页> 外文期刊>Nucleic acids research >Nucleotide sequence of the Agrobacterium tumefaciens octopine Ti plasmld-encoded tmr gene
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Nucleotide sequence of the Agrobacterium tumefaciens octopine Ti plasmld-encoded tmr gene

机译:土壤杆菌章鱼章节章鱼Ti Prasmld-Cododed TMR基因的核苷酸序列

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The nucleotide sequence of the tmr gene, encoded by the octopine Ti plasmid from Agrobacterium tumefaciens (pTiAch5), was determined. The T-DNA, which encompasses this gene, is Involved in tumor formation and maintenance, and probably mediates the cytokinin-independent growth of transformed plant cells. The nucleotide sequence of the tmr gene displays a continuous open reading frame specifying a polypeptide chain of 240 amino acids. The 5′- terminus of the polyadenylated tmr mRNA isolated from octopine tobacco tumor cell lines was determined by nuclease SI mapping. The nucleotide sequence 5′-TATAAAA-3′, which sequence is Identical to the canonical “TATA” box, was found 29 nucleotides upstream from the major initiation site for RNA synthesis. Two potential poly-adenylatlon signals 5′-AATAAA-3′ were found at 207 and 275 nucleotides downstream from the TAG stopcodon of the tmr gene. A comparison was made of nucleotide stretches, involved in transcription control of T-DNA genes.
机译:测定由官僚曲调(PTAIACH5)的章鱼Ti质粒编码的TMR基因的核苷酸序列。包含该基因的T-DNA参与肿瘤形成和维护,并且可能介导转化的植物细胞的细胞素无关的生长。 TMR基因的核苷酸序列显示出指定240个氨基酸的多肽链的连续开放读数框。通过核酸酶Si测绘测定从章鱼烟草肿瘤细胞系中分离的多腺苷酸化TMR mRNA的5'末端。序列5'-tataAA-3',其序列与规范“Tata”盒相同,发现来自主要引发位点的29个核苷酸,用于RNA合成。在TMR基因的标签中,在207和275个核苷酸中发现了两个潜在的聚亚乙酰丙酮信号5'-AataAA-3'。比较由核苷酸延伸制成,参与T-DNA基因的转录控制。

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