共 48 条
Structural studies of the RNA pseudoknot required for readthrough of the gag-termination codon of murine leukemia virus
被引:42
作者:

Alam, SL
论文数: 0 引用数: 0
h-index: 0
机构:
Univ Utah, Dept Human Genet, Salt Lake City, UT 84112 USA Univ Utah, Dept Human Genet, Salt Lake City, UT 84112 USA

Wills, NM
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h-index: 0
机构:
Univ Utah, Dept Human Genet, Salt Lake City, UT 84112 USA Univ Utah, Dept Human Genet, Salt Lake City, UT 84112 USA

Ingram, JA
论文数: 0 引用数: 0
h-index: 0
机构:
Univ Utah, Dept Human Genet, Salt Lake City, UT 84112 USA Univ Utah, Dept Human Genet, Salt Lake City, UT 84112 USA

Atkins, JF
论文数: 0 引用数: 0
h-index: 0
机构:
Univ Utah, Dept Human Genet, Salt Lake City, UT 84112 USA Univ Utah, Dept Human Genet, Salt Lake City, UT 84112 USA

Gesteland, RF
论文数: 0 引用数: 0
h-index: 0
机构:
Univ Utah, Dept Human Genet, Salt Lake City, UT 84112 USA Univ Utah, Dept Human Genet, Salt Lake City, UT 84112 USA
机构:
[1] Univ Utah, Dept Human Genet, Salt Lake City, UT 84112 USA
关键词:
translational readthrough;
stop codon redefinition;
pseudoknot;
murine leukemia virus;
recoding;
D O I:
10.1006/jmbi.1999.2713
中图分类号:
Q5 [生物化学];
Q7 [分子生物学];
学科分类号:
071010 ;
081704 ;
摘要:
Retroviruses, such as murine leukemia virus (MuLV), whose gag and pol genes are in the same reading frame but separated by a UAG stop codon, require that 5-10% of ribosomes decode the UAG as an amino acid and continue translation to synthesize the Gag-Pol fusion polyprotein. A specific pseudoknot located eight nucleotides 3' of the UAG is required for this redefinition of the UAG stop codon. The structural probing and mutagenic analyses presented here provide evidence that loop I of the pseudoknot is one nucleotide, stem II has seven base-pairs, and the nucleotides 3' of stem II are important for function. Stem II is more resistant to single-strand-specific probes than stem I. Sequences upstream of the UAG codon allow formation of two competing structures, a stem-loop and the pseudoknot. (C) 1999 Academic Press.
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页码:837 / 852
页数:16
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