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分子克隆的Friend水貂细胞灶性诱导病毒DNA的env基因和长末端重复序列的特征分析

Characterization of the env gene and long terminal repeat of molecularly cloned Friend mink cell focus-inducing virus DNA.

作者信息

Adachi A, Sakai K, Kitamura N, Nakanishi S, Niwa O, Matsuyama M, Ishimoto A

出版信息

J Virol. 1984 Jun;50(3):813-21. doi: 10.1128/JVI.50.3.813-821.1984.

Abstract

The highly oncogenic erythroleukemia-inducing Friend mink cell focus-inducing (MCF) virus was molecularly cloned in phage lambda gtWES.lambda B, and the DNA sequences of the env gene and the long terminal repeat were determined. The nucleotide sequences of Friend MCF virus and Friend spleen focus-forming virus were quite homologous, supporting the hypothesis that Friend spleen focus-forming virus might be generated via Friend MCF virus from an ecotropic Friend virus mainly by some deletions. Despite their different pathogenicity, the nucleotide sequences of the env gene of Friend MCF virus and Moloney MCF virus were quite homologous, suggesting that the putative parent sequence for the generation of both MCF viruses and the recombinational mechanism for their generation might be the same. We compare the amino acid sequences in lymphoid leukemia-inducing ecotropic Moloney virus and Moloney MCF virus, and erythroblastic leukemia-inducing ecotropic Friend virus, Friend-MCF virus, and Friend spleen focus-forming virus. The Friend MCF virus long terminal repeat was found to be 550 base pairs long. This contained two copies of the 39-base-pair tandem repeat, whereas the spleen focus-forming virus genome contained a single copy of the same sequence.

摘要

具有高度致癌性的诱导红白血病的弗瑞德水貂细胞病灶诱导(MCF)病毒在噬菌体λgtWES.λB中进行了分子克隆,并测定了env基因和长末端重复序列的DNA序列。弗瑞德MCF病毒和弗瑞德脾病灶形成病毒的核苷酸序列相当同源,支持了这样一种假说,即弗瑞德脾病灶形成病毒可能主要通过一些缺失从亲嗜性弗瑞德病毒经由弗瑞德MCF病毒产生。尽管它们的致病性不同,但弗瑞德MCF病毒和莫洛尼MCF病毒的env基因核苷酸序列相当同源,这表明产生这两种MCF病毒的推定亲本序列及其产生的重组机制可能是相同的。我们比较了诱导淋巴细胞白血病的亲嗜性莫洛尼病毒和莫洛尼MCF病毒,以及诱导成红细胞白血病的亲嗜性弗瑞德病毒、弗瑞德-MCF病毒和弗瑞德脾病灶形成病毒中的氨基酸序列。发现弗瑞德MCF病毒的长末端重复序列长550个碱基对。它包含两个39个碱基对串联重复序列的拷贝,而脾病灶形成病毒基因组包含相同序列的单个拷贝。

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