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Papers In Press, published online ahead of print July 18, 2000
Natori Special Laboratory, Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198
Corresponding Author: natori{at}postman.riken.go.jp
We isolated a cDNA clone for a novel member of the S-II family of transcription elongation factors from Xenopus laevis. This S-II, named XSII-K1, is assumed to be the Xenopus homologue of mouse SII-K1 that we reported previously [Taira et al., Genes Cells 3, 296 (1998)]. Expression of the XSII-K1 gene was found to be restricted to mesoderm-derived tissues, such as liver, kidney and skeletal muscle. Contrary to the general S-II gene, expression of the XSII-K1 gene was not detected in embryos at stages earlier than 11. The animal cap assay revealed that activin A, but not bFGF, induced expression of the XSII-K1 gene, and that it participated in the expression of mesoderm-specific genes such as Xbra and Xa-actin. This is the first demonstration that the regulation at the level of transcription elongation is included in the development of mesoderm-derived tissues.
J. Biol. Chem, 10.1074/jbc.M003920200
Submitted on May 9, 2000
Revised on July 3, 2000
Accepted on July 18, 2000
Participation of transcription elongation factor XSII-K1 in mesoderm derived tissue development in xenopus laevis
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