Expression and characterization of two STAT isoforms from Sf9 cells

Maw Sheng Yeh, Chia Hsiung Cheng, Chih Ming Chou, Ya Li Hsu, Cheng Ying Chu, Gen Der Chen, Shui Tsung Chen, Guang Chao Chen, Chang Jen Huang

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


In invertebrates, the JAK-STAT signaling pathway is involved in the anti-bacterial response and is part of an anti-viral response in Drosophila. In this study, we show that two STAT transcripts are generated by alternative splicing and encode two isoforms of Sf-STAT with different C-terminal ends. These two isoforms were produced and purified using the recombinant baculovirus technology. Both purified isoforms showed similar DNA-binding activity and displayed weak but significant transactivation potential toward a Drosophila promoter that contained a STAT-binding motif. No significant activation of the Sf-STAT protein in Sf9 cells was found by infection with baculovirus AcMNPV.

Original languageEnglish
Pages (from-to)814-824
Number of pages11
JournalDevelopmental and Comparative Immunology
Issue number7
Publication statusPublished - 2008


  • Baculovirus
  • DNA binding
  • Insect Sf9 cells
  • STAT

ASJC Scopus subject areas

  • Developmental Biology
  • Immunology


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