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PUM2, a novel murine puf protein, and its consensus RNA-binding site
E K White1, T Moore-Jarrett, H E Ruley
1Department of Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-2363, USA.
RNA (New York, N.Y.)
|January 10, 2002
Summary
Researchers identified a novel mouse protein, PUM2, that binds RNA and may regulate gene expression. This discovery aids in understanding posttranscriptional gene regulation in mammals.
Area of Science:
- Molecular Biology
- Genetics
- RNA Biology
Background:
- Puf family proteins are known translational repressors in various organisms.
- Identifying mammalian counterparts is crucial for understanding posttranscriptional gene regulation.
Purpose of the Study:
- To characterize a novel murine Puf protein, PUM2, and its RNA-binding properties.
- To identify potential RNA targets regulated by PUM2 in mammals.
Main Methods:
- Expressed and purified recombinant PUM2 protein containing the Pumilio homology domain (PUM-HD).
- Utilized iterative amplification-selection (SELEX) to identify PUM2-binding RNA sequences.
- Determined the consensus sequence of the PUM2 binding element (PBE).
Main Results:
- Pum2 transcripts are widely expressed across murine tissues.
- PUM2 possesses a PUM-HD RNA-binding domain, characteristic of the Puf family.
- Isolated high-affinity PUM2-binding RNA sequences with a consensus PBE: [UGUANAUARNNNNBBBBSCCS].
Conclusions:
- PUM2 is a novel mammalian Puf protein involved in RNA-binding.
- The identified PBE provides a target for studying PUM2-mediated gene regulation.
- Characterization of PUM2 advances the understanding of posttranscriptional gene regulation mechanisms in mammals.
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