Antimorphic PV.1 Causes secondary axis by inducing ectopic organizer

Yoo Seok Hwang, Jeong Jae Seo, Sang Wook Cha, Hyun Shik Lee, Sung Young Lee, Dong Hyun Roh, Hsiang Fu Kung, Jaebong Kim, Mae Ja Park

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Xenopus homeobox gene, PV.1 ventralizes activin-induced dorsal mesoderm and inhibits neuralization of ectoderm in animal cap when overexpressed. Here we generated PV.1/engrailed fusion construct (N-PV1-EnR) to perform loss-of-function study for this transcription factor. N-PV1-EnR showed an extremely antimorphic effect, causing a partial secondary embryonic axis when expressed at ventral marginal zone of blastula. In ventral marginal zone cells, this chimeric protein induced organizer genes and suppressed ventral markers mimicking those effects reported for dominant negative BMP-4 receptor (DNBR). Moreover, N-PV1-EnR rescued the ventralized embryos caused by the ectopic dorsal expression of PV.1 but not by that of Xvent-2. These results suggested that PV.1 functions at downstream of BMP-4 as a ventralizing effector which acts separately from Xvent-2 and the dominant negative effect gained by this specific mutant is applicable for the further studies of BMP-4 downstream pathway.

Original languageEnglish (US)
Pages (from-to)1081-1086
Number of pages6
JournalBiochemical and Biophysical Research Communications
Volume292
Issue number4
DOIs
StatePublished - 2002

Keywords

  • Antimorphic PV.1
  • BMP-4
  • Dorsoventral axis
  • Ectopic organizer
  • Homeobox
  • Loss-of-function
  • PV.1
  • Secondary axis
  • Ventralization
  • Xenopus laevis embryo

PubMed: MeSH publication types

  • Journal Article
  • Research Support, Non-U.S. Gov't

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