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Rev (HIV)
Rev is a transactivating protein that is essential to the regulation of HIV-1 protein expression. A nuclear localization signal is encoded in the ''rev'' gene, which allows the Rev protein to be localized to the nucleus, where it is involved in the export of unspliced and incompletely spliced mRNAs. In the absence of Rev, mRNAs of the HIV-1 late (structural) genes are retained in the nucleus, preventing their translation.
==History==
A novel protein was found to be involved in the translation of ''gag'' and ''env'' mRNA. The unknown protein functioned by removing repression of regulatory sequences and was named Art (anti-repression transactivator). Later studies suggested that the protein was involved in regulation of the RNA splicing mechanism. Therefore, the name of the protein was modified from Art to Trs (transregulator of splicing). The most recent studies have shown that the protein has multiple functions in the regulation of HIV-1 proteins, and its name has been changed to Rev (regulator of expression of virion proteins), which more generally describes its function.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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