RNA-binding proteins TIA-1 and TIAR link the phosphorylation of eIF-2 alpha to the assembly of mammalian stress granules.
RNA-binding proteins TIA-1 and TIAR link the phosphorylation of eIF-2 alpha to the assembly of mammalian stress granules.
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DOI:
10.1083/jcb.147.7.1431
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发表时间:
1999-12-27
期刊:
影响因子:
--
通讯作者:
Anderson P
中科院分区:
文献类型:
--
作者:
Kedersha NL;Gupta M;Li W;Miller I;Anderson P
In response to environmental stress, the related RNA-binding proteins TIA-1 and TIAR colocalize with poly(A)+ RNA at cytoplasmic foci that resemble the stress granules (SGs) that harbor untranslated mRNAs in heat shocked plant cells (Nover et al. 1989; Nover et al. 1983; Scharf et al. 1998). The accumulation of untranslated mRNA at SGs is reversible in cells that recover from a sublethal stress, but irreversible in cells subjected to a lethal stress. We have found that the assembly of TIA-1/R+ SGs is initiated by the phosphorylation of eIF-2α. A phosphomimetic eIF-2α mutant (S51D) induces the assembly of SGs, whereas a nonphosphorylatable eIF-2α mutant (S51A) prevents the assembly of SGs. The ability of a TIA-1 mutant lacking its RNA-binding domains to function as a transdominant inhibitor of SG formation suggests that this RNA-binding protein acts downstream of the phosphorylation of eIF-2α to promote the sequestration of untranslated mRNAs at SGs. The assembly and disassembly of SGs could regulate the duration of stress- induced translational arrest in cells recovering from environmental stress.
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影响因子:
5.3
作者:
MATUNIS, MJ;MATUNIS, EL;DREYFUSS, G
通讯作者:
DREYFUSS, G
影响因子:
56.9
作者:
CACERES, JF;STAMM, S;KRAINER, AR
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影响因子:
4.8
作者:
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通讯作者:
de Haro, C
DOI:
10.1073/pnas.86.23.9163
发表时间:
1989-12-01
影响因子:
11.1
作者:
DAVIES, MV;FURTADO, M;KAUFMAN, RJ
通讯作者:
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影响因子:
15.3
作者:
HAN, J;BROWN, T;BEUTLER, B
通讯作者:
BEUTLER, B