Alternative promoter and GATA5 transcripts in mouse

Bohao Chen, Elena Yates, Yong Huang, Paul Kogut, Lan Ma, Jerrold R. Turner, Yun Tao, Blanca Camoretti-Mercado, Deborah Lang, Eric C. Svensson, Joe G.N. Garcia, Peter J. Gruber, Edward E. Morrisey, Julian Solway

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

GATA5 is a member of the GATA zinc finger transcription factor family involved in tissue-specific transcriptional regulation during cell differentiation and embryogenesis. Previous reports indicate that null mutation of the zebrafish GATA5 gene results in embryonic lethality, whereas deletion of exon 1 from the mouse GATA5 gene causes only derangement of female urogenital development. Here, we have identified an alternate promoter within intron 1 of the mouse GATA5 gene that transcribes a 2.5-kb mRNA that lacks exon 1 entirely but includes 82 bp from intron 1 and all of exons 2-6. The alternative promoter was active during transient transfection in cultured airway myocytes and bronchial epithelial cells, and it drove reporter gene expression in gastric epithelial cells in transgenic mice. The 2.5-kb alternative transcript encodes an NH2-terminally truncated "short GATA5" comprising aa 226-404 with a single zinc finger, which retains ability to transactivate the atrial natriuretic factor promoter (albeit less efficiently than full-length GATA5). Another new GATA5 transcript contains all of exons 1-5 and the 5′ portion of exon 6 but lacks the terminal 1143 bp of the 3′-untranslated region from exon 6. These findings extend current understanding of the tissue distribution of GATA5 expression and suggests that GATA5 expression and function are more complex than previously appreciated.

Original languageEnglish (US)
Pages (from-to)G1214-G1222
JournalAmerican Journal of Physiology - Gastrointestinal and Liver Physiology
Volume297
Issue number6
DOIs
StatePublished - Dec 1 2009
Externally publishedYes

Keywords

  • Airway
  • Differentiation
  • Epithelium
  • Gut

ASJC Scopus subject areas

  • Physiology
  • Hepatology
  • Gastroenterology
  • Physiology (medical)

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  • Cite this

    Chen, B., Yates, E., Huang, Y., Kogut, P., Ma, L., Turner, J. R., Tao, Y., Camoretti-Mercado, B., Lang, D., Svensson, E. C., Garcia, J. G. N., Gruber, P. J., Morrisey, E. E., & Solway, J. (2009). Alternative promoter and GATA5 transcripts in mouse. American Journal of Physiology - Gastrointestinal and Liver Physiology, 297(6), G1214-G1222. https://doi.org/10.1152/ajpgi.00165.2009