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Related Experiment Videos

A combinatorial code for CPE-mediated translational control.

Maria Piqué1, José Manuel López, Sylvain Foissac

  • 1Centre for Genomic Regulation (CRG), UPF, C/Dr. Aiguader, 88, 08003 Barcelona, Spain.

Cell
|February 13, 2008
PubMed
Summary
This summary is machine-generated.

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A new combinatorial code involving the cytoplasmic polyadenylation element (CPE) and Pumilio-binding element dictates mRNA translation timing and extent. This finding clarifies how CPEB controls gene expression during key biological processes.

Area of Science:

  • Molecular Biology
  • Gene Regulation
  • Translational Control

Background:

  • Cytoplasmic polyadenylation is crucial for mRNA translation in processes like cell division and neural function.
  • The precise timing and level of mRNA translation are regulated by cytoplasmic polyadenylation.
  • The cytoplasmic polyadenylation element (CPE) and its binding protein (CPEB) are known regulators, forming complexes for repression or activation.

Purpose of the Study:

  • To elucidate the regulatory mechanisms determining the timing and extent of cytoplasmic polyadenylation-dependent translational control.
  • To identify the specific sequence and positional elements that govern mRNA translational regulation by CPEB.

Main Methods:

  • Genome-wide computational predictions of regulatory elements.

Related Experiment Videos

  • Site-directed mutagenesis to alter CPE and Pumilio-binding element numbers and positions.
  • Experimental validation of predicted regulatory codes.

    • Main Results:

    • The number and relative positioning of the CPE and Pumilio-binding element form a combinatorial code.
    • This code determines whether an mRNA is translationally repressed by CPEB.
    • The code also dictates the extent and timing of cytoplasmic polyadenylation-dependent translational activation.

    Conclusions:

    • A combinatorial code, based on CPE and Pumilio-binding element arrangement, governs mRNA translational control.
    • This code provides a framework for understanding differential mRNA translation timing and regulation.
    • The findings offer insights into the precise control of gene expression in essential biological processes.