Identification and characterization of the woodchuck hepatitis virus origin of DNA replication.
Identification and characterization of the woodchuck hepatitis virus origin of DNA replication.
复制标题
土拨鼠肝炎病毒 DNA 复制起源的鉴定和表征。
DOI：
10.1128/jvi.64.1.16-23.1990
复制
发表时间：
1990
影响因子：
5.4
通讯作者：
Maragos,J
中科院分区：
文献类型：
--
作者：
Seeger,C;Maragos,J
Replication of the woodchuck hepatitis virus (WHV) genome requires the synthesis of minus-strand DNA from an RNA template, the pregenome, by reverse transcription. During this reaction, the 5' end of minus-strand DNA becomes covalently linked to a protein. The position of the 5' end of minus-strand DNA was identified previously, but the initiation site for DNA synthesis on pregenomic RNA remained ambiguous because of a sequence repetition at the termini of the RNA template for reverse transcription. Employing a recently designed expression vector for the production of infectious WHV, we localized the origin of minus-strand DNA synthesis to the 3' end of pregenomic RNA. In addition, we identified the nucleotide sequences on pregenomic RNA that provide the signal for the initiation of reverse transcription. Removal of this signal sequence from pregenomic RNA abolished minus-strand DNA synthesis. Insertion of a DNA oligomer bearing this signal sequence at the 3' end of pregenomic RNA restored the production of minus-strand DNA joined to protein. Our results support a model in which protein is the primer for reverse transcription of minus-strand DNA of WHV.
