What is the typical half life of messenger RNA inside human cells?
In human cells, mRNA decay rates vary significantly among different functional classes of transcripts, making a single 'typical' half-life difficult to define[1]. However, research indicates that certain transcripts, such as those encoding transcription factors, are enriched in 'fast-decaying' mRNAs with half-lives of less than 2 hours[1]. In other biological contexts, such as the early Drosophila embryo, studies have estimated zygotic transcript half-lives with a median of 16 minutes[2].
| Finding | Study/source type | Source | Year |
|---|---|---|---|
| Transcription factor mRNAs often have half-lives < 2 hours | Research Article | nih (PMC403777) | 2003 |
| Zygotic mRNA half-lives in early Drosophila embryos have a median of 16 minutes | Research Article | doi (10.1371/journal.pbio.3001956) | 2023 |
Regulation of mRNA decay is complex and involves cooperative binding of multiple RNA-binding proteins rather than relying on simple sequence motifs as strong predictors of turnover rates[1]. Additionally, mRNA stability can be influenced by association with processing bodies (P-bodies), which are implicated in both mRNA storage and 5' to 3' degradation pathways[2].
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