In planta expression of a protein encoded by the extrachromosomal DNA of a phytoplasma and related to geminivirus replication proteins.

In planta expression of a protein encoded by the extrachromosomal DNA of a phytoplasma and related to geminivirus replication proteins.
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在植物中表达由植原体染色体外 DNA 编码且与双生病毒复制蛋白相关的蛋白质。

DOI:
10.1099/00221287-147-2-507
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发表时间:
2001
期刊:
影响因子:
1.5
通讯作者:
S. Namba
S. Namba
中科院分区:
生物学4区
文献类型:
--
作者:
H. Nishigawa;S. Miyata;K. Oshima;T. Sawayanagi;A. Komoto;T. Kuboyama;I. Matsuda;T. Tsuchizaki;S. Namba

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从洋葱黄化植原体 (OY-W) 中克隆了一种新的染色体外 DNA,EcOYW1。 Southern 印迹和 PCR 分析表明,EcOYW1 不存在于 OY-M 中,OY-M 是源自 OY-W 的轻度症状系。我们确定了EcOYW1的完整核苷酸序列;它是一个长度为7.0 kbp的环状双链DNA,包含7个ORF。 ORF1 编码双生病毒 Rep 蛋白的同源物。 Western免疫印迹分析表明,该Rep同源物在OY-W感染的植物中表达,表明EcOYW1通过类似双生病毒的滚环复制机制进行复制。 EcoOYW1 是第一个被证明可以表达编码基因的植质染色体外 DNA。
A new extrachromosomal DNA, EcOYW1, was cloned from the onion yellows phytoplasma (OY-W). Southern blot and PCR analysis showed that EcOYW1 is not present in the OY-M, a mild symptom line derived from OY-W. We determined the complete nucleotide sequence of EcOYW1; it is a circular dsDNA of 7.0 kbp in length, which contains seven ORFs. ORF1 encoded a homologue of the geminivirus Rep protein. Western immunoblot analysis revealed that this Rep homologue is expressed in OY-W infected plants, suggesting that EcOYW1 replicates via a geminivirus-like rolling-circle replication mechanism. EcOYW1 is the first phytoplasmal extrachromosomal DNA shown to express encoded genes.
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