© 2005 The Japanese Biochemical Society.
Regular Paper |
Involvement of EDTP, an Egg-Derived Tyrosine Phosphatase, in the Early Development of Drosophila melanogaster
1 Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Bunkyo-ku, Tokyo 113-0033; 2 Faculty of Pharmaceutical Sciences, Teikyo University, 1091-1 Sagamiko, Tsukui-gun, Kanagawa 199-0195; 3 Natori Special Laboratory, The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako-shi, Saitama 351-0198
* To whom correspondence should be addressed. Tel: +81-426-85-3739; Fax: +81-426-85-3738, E-mail: shinji-y{at}pharm.teikyo-u.ac.jp
Previously, we purified a novel protein tyrosine phosphatase from eggs of the flesh fly, Sarcophaga peregrina. This protein tyrosine phosphatase, named egg-derived tyrosine phosphatase (EDTP), is expressed during oogenesis and early embryogenesis but is rapidly degraded in middle embryogenesis by lysosomal cathepsin L. Here, we demonstrate the requirement of EDTP in the development of the fruit fly, Drosophila melanogaster. Deletion of the Drosophila EDTP gene using transposase-catalyzed imprecise excision resulted in homozygous lethals during embryogenesis. Additionally, germline clones generated using the FLP-FRT-ovoD system showed severe defects in ovarian development during oogenesis. These results indicate that the Drosophila EDTP gene is crucial in oogenesis and embryogenesis.