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PVR plays a critical role via JNK activation in thorax closure during Drosophila metamorphosis
Author(s) -
Ishimaru Satoshi,
Ueda Ryu,
Hinohara Yoshimi,
Ohtani Mayumi,
Hanafusa Hidesaburo
Publication year - 2004
Publication title -
the embo journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.484
H-Index - 392
eISSN - 1460-2075
pISSN - 0261-4189
DOI - 10.1038/sj.emboj.7600417
Subject(s) - biology , metamorphosis , thorax (insect anatomy) , drosophila melanogaster , drosophila (subgenus) , closure (psychology) , microbiology and biotechnology , anatomy , larva , zoology , ecology , genetics , gene , economics , market economy
PVR, the Drosophila homolog of the PDGF/VEGF receptor, has been implicated in border cell migration during oogenesis and hemocyte migration during embryogenesis. It was earlier shown that Mbc, a CDM family protein, and its effector, Rac, transduced the guidance signal from PVR during border cell migration. Here we demonstrate that PVR is also required for the morphogenetic process, thorax closure, during metamorphosis. The results of genetic and biochemical experiments indicate that PVR activates the JNK pathway. We present evidence showing Crk (an adaptor molecule), Mbc, ELMO (a homolog of Caenorhabditis elegans CED‐12 and mammalian ELMO), and Rac to be mediators of JNK activation by PVR. In addition, we suppose that not only Rac but also Cdc42 is activated and involved in JNK activation downstream of PVR.