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- W2007085897 abstract "Understanding gene expression control requires defining the molecular and cellular basis of mRNA turnover. We have previously shown that the human decapping factors hDcp2 and hDcp1a are concentrated in specific cytoplasmic structures. Here, we show that hCcr4, hDcp1b, hLsm, and rck/p54 proteins related to 5'-3' mRNA decay also localize to these structures, whereas DcpS, which is involved in cap nucleotide catabolism, is nuclear. Functional analysis using fluorescence resonance energy transfer revealed that hDcp1a and hDcp2 interact in vivo in these structures that were shown to differ from the previously described stress granules. Our data indicate that these new structures are dynamic, as they disappear when mRNA breakdown is abolished by treatment with inhibitors. Accumulation of poly(A)(+) RNA in these structures, after RNAi-mediated inactivation of the Xrn1 exonuclease, demonstrates that they represent active mRNA decay sites. The occurrence of 5'-3' mRNA decay in specific subcellular locations in human cells suggests that the cytoplasm of eukaryotic cells may be more organized than previously anticipated." @default.
- W2007085897 created "2016-06-24" @default.
- W2007085897 creator A5020315292 @default.
- W2007085897 creator A5021369655 @default.
- W2007085897 creator A5023117880 @default.
- W2007085897 date "2004-04-05" @default.
- W2007085897 modified "2023-10-13" @default.
- W2007085897 title "Cytoplasmic foci are sites of mRNA decay in human cells" @default.
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- W2007085897 doi "https://doi.org/10.1083/jcb.200309008" @default.
- W2007085897 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2172085" @default.
- W2007085897 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/15067023" @default.
- W2007085897 hasPublicationYear "2004" @default.
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