Cited by 49RNA Research and SplicingRNA regulation and diseaseRNA and protein synthesis mechanisms

Promotion of exon 6 inclusion in HuD pre-mRNA by Hu protein family members

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Wang, Huiwen, Molfenter, Jill, Zhu, Hui, Lou, Hua·2010·Nucleic Acids Research

Abstract

The Hu RNA-binding protein family consists of four members: HuR/A, HuB, HuC and HuD. HuR expression is widespread. The other three neuron-specific Hu proteins play an important role in neuronal differentiation through modulating multiple processes of RNA metabolism. In the splicing events examined previously, Hu proteins promote skipping of the alternative exons. Here, we report the first example where Hu proteins promote inclusion of an alternative exon, exon 6 of the HuD pre-mRNA. Sequence alignment analysis indicates the presence of several conserved AU-rich sequences both upstream and downstream to this alternatively spliced exon. We generated a human HuD exon 6 mini-gene reporter construct that includes these conserved sequences. Hu protein over-expression led to significantly increased exon 6 inclusion from this reporter and endogenous HuD. Studies using truncated and mutant HuD exon 6 reporters demonstrate that two AU-rich sequences located downstream of exon 6 are important. RNAi knockdown of Hu proteins decreased exon 6 inclusion. An in vitro splicing assay indicates that Hu proteins promote HuD exon 6 inclusion directly at the level of splicing. Our studies demonstrate that Hu proteins can function as splicing enhancers and expand the functional role of Hu proteins as splicing regulators.

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Authors
Wang, H., Molfenter, J., Zhu, H., & Lou, H.
Affiliations
  • Case Western Reserve University (US)
  • Case Comprehensive Cancer Center (US)
Corresponding author
Lou, Hua
Venue
Nucleic Acids Research
Published
2010-02-16
Volume
38
Issue
11
Pages
3760-3770
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2137368340
Cited by
49
References
48
Citations by year
2026: 1 · 2024: 1 · 2022: 3 · 2021: 3 · 2020: 3 · 2018: 3 · 2017: 4 · 2016: 1 · 2015: 3 · 2014: 4 · 2013: 9 · 2012: 5
FWCI
3.00
Type
journal article
Language
en
Open access
Locations
  • Nucleic Acids Research (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • HighWire Press Open Archive (submittedVersion)
Funders
  • U.S. Department of Defense
  • American Heart Association
  • Case Western Reserve University
  • National Institutes of Health
  • National Institute of Neurological Disorders and Stroke (R56NS049103, R01NS049103, NS-049103)
  • National Center for Research Resources (S10RR024536)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Research and Splicing
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA regulation and disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA and protein synthesis mechanisms
Keywords
HUD, HU protein, alternative splicing, exon inclusion, exon 6, AU-rich elements, splicing enhancers, RNA-binding proteins, pre-mRNA splicing regulation, HuR, hubs, HuC
MeSH terms
ELAV-Like Protein 3, ELAV-Like Protein 4, Adenine, Base Sequence, Cell Line, Exons, Humans, Introns, Molecular Sequence Data, RNA Precursors, RNA, Messenger, Uracil, Sequence Alignment, Conserved Sequence, Alternative Splicing, Regulatory Sequences, Ribonucleic Acid, ELAV Proteins

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