The Helix-Loop-Helix motif of human EIF3A regulates translation of proliferative cellular mRNAs.
The Helix-Loop-Helix motif of human EIF3A regulates translation of proliferative cellular mRNAs.
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人EIF3A的螺旋环螺旋序列调节增殖性细胞mRNA的翻译。
DOI:
10.1371/journal.pone.0292080
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发表时间:
2023
期刊:
影响因子:
3.7
通讯作者:
中科院分区:
文献类型:
--
作者:
Improper regulation of translation initiation, a vital checkpoint of protein synthesis in the cell, has been linked to a number of cancers. Overexpression of protein subunits of eukaryotic translation initiation factor 3 (eIF3) is associated with increased translation of mRNAs involved in cell proliferation. In addition to playing a major role in general translation initiation by serving as a scaffold for the assembly of translation initiation complexes, eIF3 regulates translation of specific cellular mRNAs and viral RNAs. Mutations in the N-terminal Helix-Loop-Helix (HLH) RNA-binding motif of the EIF3A subunit interfere with Hepatitis C Virus Internal Ribosome Entry Site (IRES) mediated translation initiation in vitro. Here we show that the EIF3A HLH motif controls translation of a small set of cellular transcripts enriched in oncogenic mRNAs, including MYC. We demonstrate that the HLH motif of EIF3A acts specifically on the 5′ UTR of MYC mRNA and modulates the function of EIF4A1 on select transcripts during translation initiation. In Ramos lymphoma cell lines, which are dependent on MYC overexpression, mutations in the HLH motif greatly reduce MYC expression, impede proliferation and sensitize cells to anti-cancer compounds. These results reveal the potential of the EIF3A HLH motif in eIF3 as a promising chemotherapeutic target.
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影响因子:
14.9
作者:
Kuleshov MV;Jones MR;Rouillard AD;Fernandez NF;Duan Q;Wang Z;Koplev S;Jenkins SL;Jagodnik KM;Lachmann A;McDermott MG;Monteiro CD;Gundersen GW;Ma'ayan A
通讯作者:
Ma'ayan A
影响因子:
48
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Langmead, Ben;Salzberg, Steven L.
通讯作者:
Salzberg, Steven L.
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14.9
作者:
Eliseev B;Yeramala L;Leitner A;Karuppasamy M;Raimondeau E;Huard K;Alkalaeva E;Aebersold R;Schaffitzel C
通讯作者:
Schaffitzel C
影响因子:
14.9
作者:
Sokabe M;Fraser CS;Hershey JW
通讯作者:
Hershey JW
影响因子:
7.7
作者:
De Silva D;Ferguson L;Chin GH;Smith BE;Apathy RA;Roth TL;Blaeschke F;Kudla M;Marson A;Ingolia NT;Cate JH
通讯作者:
Cate JH