Cited by 113RNA Research and SplicingRNA and protein synthesis mechanismsHemoglobinopathies and Related Disorders

The Poly(A)-Binding Protein and an mRNA Stability Protein Jointly Regulate an Endoribonuclease Activity

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Wang, Zuoren, Kiledjian, Megerditch·2000·Molecular and Cellular Biology

Abstract

We previously identified a sequence-specific erythroid cell-enriched endoribonuclease (ErEN) activity involved in the turnover of the stable alpha-globin mRNA. We now demonstrate that ErEN activity is regulated by the poly(A) tail. The unadenylated alpha-globin 3' untranslated region (3'UTR) was an efficient substrate for ErEN cleavage, while the polyadenylated 3'UTR was inefficiently cleaved in an in vitro decay assay. The influence of the poly(A) tail was mediated through the poly(A)-binding protein (PABP) bound to the poly(A) tail, which can inhibit ErEN activity. ErEN cleavage of an adenylated alpha-globin 3'UTR was accentuated upon depletion of PABP from the cytosolic extract, while addition of recombinant PABP reestablished the inhibition of endoribonuclease cleavage. PABP inhibited ErEN activity indirectly through an interaction with the alphaCP mRNA stability protein. Sequestration of alphaCP resulted in an increase of ErEN cleavage activity, regardless of the polyadenylation state of the RNA. Using electrophoretic mobility shift assays, PABP was shown to enhance the binding efficiency of alphaCP to the alpha-globin 3'UTR, which in turn protected the ErEN target sequence. Conversely, the binding of PABP to the poly(A) tail was also augmented by alphaCP, implying that a stable higher-order structural network is involved in stabilization of the alpha-globin mRNA. Upon deadenylation, the interaction of PABP with alphaCP would be disrupted, rendering the alpha-globin 3'UTR more susceptible to endoribonuclease cleavage. The data demonstrated a specific role for PABP in protecting the body of an mRNA in addition to demonstrating PABP's well-characterized effect of stabilizing the poly(A) tail.

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Crossref · 10.1128/mcb.20.17.6334-6341.2000

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  • The poly(A) tail can bind to multiple poly(A)-binding proteins (PABPs) while working synergistically with 5′ m7G cap sequences to regulate translational efficiency.

    “The poly(A) tail can also bind to multiple poly(A)-binding proteins (PABPs) while working synergistically with 5′ m7G cap sequences to regulate translational efficiency.146,147”

    From Advances in COVID-19 mRNA vaccine development (2022) · cites this paper as [147]

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Authors
Wang, Z., & Kiledjian, M.
Affiliations
Rutgers, The State University of New Jersey (US)
Corresponding author
Kiledjian, Megerditch
Venue
Molecular and Cellular Biology
Published
2000-09
Volume
20
Issue
17
Pages
6334-6341
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2158537780
Cited by
113
References
59
Citations by year
2026: 3 · 2025: 2 · 2024: 2 · 2023: 2 · 2022: 3 · 2021: 1 · 2020: 1 · 2019: 2 · 2018: 1 · 2017: 2 · 2016: 2 · 2015: 2 · 2014: 5 · 2013: 3 · 2012: 4
FWCI
4.22
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK051611, DK 51611)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
  • Health Sciences › Medicine › Genetics › Hemoglobinopathies and Related Disorders
Keywords
poly(A)-binding protein, alpha-globin mRNA, mRNA stability, endoribonuclease, 3' untranslated region, poly(A) tail, mRNA degradation, deadenylation, erythroid cells, protein-protein interaction, mRNA stabilization
MeSH terms
Animals, Cytosine, DNA-Binding Proteins, Dose-Response Relationship, Drug, Endoribonucleases, Globins, Humans, Plasmids, Poly A, Protein Binding, Recombinant Proteins, RNA, Messenger, Tumor Cells, Cultured, Erythroid Precursor Cells, RNA-Binding Proteins, 3' Untranslated Regions, Heterogeneous-Nuclear Ribonucleoproteins, Poly(A)-Binding Proteins, Mice

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