Quantifying the dynamics of IRES and cap translation with single-molecule resolution in live cells.
Quantifying the dynamics of IRES and cap translation with single-molecule resolution in live cells.
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DOI:
10.1038/s41594-020-0504-7
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发表时间:
2020-12
影响因子:
16.8
通讯作者:
Stasevich TJ
中科院分区:
文献类型:
--
作者:
Koch A;Aguilera L;Morisaki T;Munsky B;Stasevich TJ
Viruses use internal Ribosome Entry Sites (IRES) to hijack host ribosomes and promote cap-independent translation. While well-studied in bulk, the dynamics of IRES-mediated translation remain unexplored at the single-molecule level. Here, we developed a bicistronic biosensor encoding distinct repeat epitopes in two open reading frames (ORFs), one translated from the 5’-cap, the other from the Encephalomyocarditis Virus IRES. When combined with a pair of complementary probes that bind the epitopes co-translationally, the biosensor lights up in different colors depending on which ORF is translated. Using the sensor together with single-molecule tracking and computational modeling, we measured the kinetics of cap-dependent versus IRES-mediated translation in living human cells. We show that bursts of IRES translation are shorter and rarer than bursts of cap translation, although the situation reverses upon stress. Collectively our data support a model for translational regulation primarily driven by transitions between translationally active and inactive RNA states.
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影响因子:
2.7
作者:
Bochkov, Yury A.;Palmenberg, Ann C.
通讯作者:
Palmenberg, Ann C.
DOI:
10.1099/vir.0.042499-0
发表时间:
2012-07
期刊:
The Journal of general virology
影响因子:
--
作者:
Firth AE;Brierley I
通讯作者:
Brierley I
DOI:
10.1083/jcb.201806183
发表时间:
2018-12-03
期刊:
The Journal of cell biology
影响因子:
--
作者:
Khong A;Parker R
通讯作者:
Parker R
影响因子:
5.2
作者:
Carocci M;Bakkali-Kassimi L
通讯作者:
Bakkali-Kassimi L
DOI:
10.1073/pnas.70.12.3866
发表时间:
1973-01-01
影响因子:
11.1
作者:
AZZAM, ME;ALGRANATI, ID
通讯作者:
ALGRANATI, ID