Abstract:
:The Tat proteins of human immunodeficiency virus types 1 (HIV-1) and 2 (HIV-2), termed Tat-1 and Tat-2, respectively, are essential for efficient viral replication. Tat proteins activate viral transcription by binding to the TAR RNA stem-loop structure at the 5' end of viral transcripts. We used an in vitro selection procedure to identify RNAs present in a large sequence pool that are able to bind to purified Tat-2 protein. The sequences of the selected RNAs demonstrated a consensus feature: 20 of 27 RNAs contained computer-predicted loop structures that were >50% U or C nucleotides. A selected RNA was characterized for its in vitro binding properties to various Tat-2 proteins. This synthetic RNA was bound by wild-type Tat-2 proteins with an affinity that was only slightly lower than that of the natural HIV-2 TAR RNA. Tat-2 required a wild-type RNA binding domain to bind to this synthetic RNA. This study indicates that in vitro selection techniques can be used to investigate Tat protein-TAR RNA interactions. Copyright 1997 S. Karger AG, Basel
journal_name
J Biomed Scijournal_title
Journal of biomedical scienceauthors
Rhim H,Rice APdoi
10.1007/BF02255590keywords:
subject
Has Abstractpub_date
1997-01-01 00:00:00pages
28-34issue
1eissn
1021-7770issn
1423-0127pii
jbs04028journal_volume
4pub_type
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更新日期:2020-09-21 00:00:00
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