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The destabilizing elements in the coding region of c-fos mRNA are recognized as RNA.

机译:c-fos mRNA编码区中的不稳定元件被识别为RNA。

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The protein-coding region of the c-fos proto-oncogene transcript contains elements that direct the rapid deadenylation and decay of this mRNA in mammalian cells. The function of these coding region instability determinants requires movement of ribosomes across mRNAs containing them. Three types of mechanisms could account for this translational requirement. Two of these possibilities, (i) that rapid mRNA decay might be mediated by the nascent polypeptide chain and (ii) that it might result from an unusual codon usage, have experimental precedent. Here, we present evidence that the destabilizing elements in the c-fos coding region are not recognized in either of these two ways. Instead, the ability of the c-fos coding region to function as a potent mRNA destabilizer when translated in the +1 reading frame indicates that the signals for rapid deadenylation and decay reside in the sequence or structure of the RNA comprising this c-fos domain.
机译:c-fos原癌基因转录本的蛋白质编码区含有指导该mRNA在哺乳动物细胞中快速去甲腺苷酸化和降解的元件。这些编码区不稳定性决定簇的功能要求核糖体跨过包含它们的mRNA移动。三种类型的机制可以解释这种转换要求。这些可能性中的两种,(i)快速的mRNA降解可能是由新生的多肽链介导的,以及(ii)它可能是由不寻常的密码子使用引起的,具有实验先例。在这里,我们提供的证据表明,这两种方式均无法识别c-fos编码区域中的不稳定元素。取而代之的是,当在+1阅读框中翻译时,c-fos编码区充当有效的mRNA去稳定剂的能力表明,快速去甲腺苷酸化和衰变的信号位于包含该c-fos结构域的RNA的序列或结构中。

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