Regulatory roles of heterogeneous nuclear ribonucleoprotein M and Nova-1 protein in alternative splicing of dopamine D2 receptor pre-mRNA

Eonyoung Park, Ciro Iaccarino, Jiwon Lee, Ilmin Kwon, Sun Mi Baik, Myungjin Kim, Jae Young Seong, Gi Hoon Son, Emiliana Borrelli, Kyungjin Kim

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The dopamine D2 receptor (D2R) plays a crucial role in the regulation of diverse key physiological functions, including motor control, reward, learning, and memory. This receptor is present in vivo in two isoforms, D2L and D2S, generated from the same gene by alternative pre-mRNA splicing. Each isoform has a specific role in vivo, underlining the importance of a strict control of its synthesis, yet the molecular mechanism modulating alternative D2 Rpre-mRNA splicing has not been completely elucidated. Here, we identify heterogeneous nuclear ribonucleoprotein M (hnRNP M) as a key molecule controlling D2R splicing. We show that binding of hnRNP M to exon 6 inhibited the inclusion of this exon in the mRNA. Importantly, the splicing factor Nova-1 counteracted hnRNP M effects on D2R pre-mRNA splicing. Indeed, mutations of the putative Nova-1-binding site on exon 6 disrupted Nova-1 RNA assembly and diminished the inhibitory effect of Nova-1 on hnRNP M-dependent exon 6 exclusion. These results identify Nova-1 and hnRNP M as D2R pre-mRNA-binding proteins and show their antagonistic role in the alternative splicing of D2R pre-mRNA.

Original languageEnglish
Pages (from-to)25301-25308
Number of pages8
JournalJournal of Biological Chemistry
Volume286
Issue number28
DOIs
Publication statusPublished - 2011 Jul 15

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Heterogeneous-Nuclear Ribonucleoprotein Group M
Dopamine D2 Receptors
RNA Precursors
Alternative Splicing
Exons
Proteins
Protein Isoforms
Messenger RNA
Reward
Carrier Proteins
Genes
Binding Sites
Nova antigen
Learning
RNA
Data storage equipment
Mutation
Molecules

ASJC Scopus subject areas

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Cite this

Regulatory roles of heterogeneous nuclear ribonucleoprotein M and Nova-1 protein in alternative splicing of dopamine D2 receptor pre-mRNA. / Park, Eonyoung; Iaccarino, Ciro; Lee, Jiwon; Kwon, Ilmin; Baik, Sun Mi; Kim, Myungjin; Seong, Jae Young; Son, Gi Hoon; Borrelli, Emiliana; Kim, Kyungjin.

In: Journal of Biological Chemistry, Vol. 286, No. 28, 15.07.2011, p. 25301-25308.

Research output: Contribution to journalArticle

Park, Eonyoung ; Iaccarino, Ciro ; Lee, Jiwon ; Kwon, Ilmin ; Baik, Sun Mi ; Kim, Myungjin ; Seong, Jae Young ; Son, Gi Hoon ; Borrelli, Emiliana ; Kim, Kyungjin. / Regulatory roles of heterogeneous nuclear ribonucleoprotein M and Nova-1 protein in alternative splicing of dopamine D2 receptor pre-mRNA. In: Journal of Biological Chemistry. 2011 ; Vol. 286, No. 28. pp. 25301-25308.
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