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Related Experiment Video

Updated: Jun 13, 2026

Engineering Artificial Factors to Specifically Manipulate Alternative Splicing in Human Cells

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Published on: April 26, 2017

Translational repression by PUF proteins in vitro.

Jacqueline J Chritton¹, Marvin Wickens

¹Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.

RNA (New York, N.Y.)

|April 30, 2010

Summary

Pumilio and FBF (PUF) proteins regulate gene expression by binding mRNA. This study developed an in vitro assay showing PUF proteins repress translation across species, highlighting sequence-specific regulation.

Area of Science:

Molecular Biology
Gene Regulation
RNA Biology

Background:

Pumilio and FBF (PUF) proteins are key regulators of mRNA stability and translation.
They bind specific sequences in the 3' untranslated regions (UTRs) of target mRNAs.
Understanding PUF protein function requires robust experimental systems.

Purpose of the Study:

To establish an in vitro translation assay to study PUF protein activity.
To investigate the cross-species functionality and specificity of PUF proteins.
To elucidate the mechanisms of PUF-mediated translational repression.

Main Methods:

Development of an in vitro translation system using yeast cell lysates.
Addition of recombinant PUF proteins to repress reporter mRNAs with specific 3'UTRs.

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Analysis of PUF protein activity and specificity from Saccharomyces cerevisiae and Caenorhabditis elegans.

Main Results:

The in vitro assay successfully reconstituted PUF protein-mediated translational repression.
PUF proteins from yeast and C. elegans demonstrated conserved activity and specificity.
Repression efficiency varied among different mRNA targets, influenced by ancillary sequences and distance from the open reading frame (ORF).

Conclusions:

PUF proteins function in vitro across different species, indicating conserved regulatory mechanisms.
Specific sequences within the 3'UTR, beyond the PUF binding site, modulate repression.
PUF proteins may control translation by affecting termination or elongation, with distance-dependent effects.