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Loss of PABPC1 is compensated by elevated PABPC4 and correlates with transcriptome changes

Xie, J.; Wei, X.; Chen, Y.; Gehring, K.

2021-02-08 biochemistry
10.1101/2021.02.07.430165 bioRxiv
Show abstract

Cytoplasmic poly(A) binding protein (PABP) is an essential translation factor that binds to the 3 tail of mRNAs to promote translation and regulate mRNA stability. PABPC1 is the most abundant of several PABP isoforms that exist in mammals. Here, we used the CRISPR/Cas genome editing system to shift the isoform composition in HEK293 cells. Disruption of PABPC1 elevated PABPC4 levels. Transcriptome analysis revealed that the shift in the dominant PABP isoform was correlated with changes in key transcriptional regulators. This study provides insight into understanding the role of PABP isoforms in development and differentiation.

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