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Here we report that homologues of the mammalian Arp2\/3 complex and N-WASP in Caenorhabditis elegansplay an important role in hypodermal cell migration during morphogenesis, a process known as ventral enclosure. In the absence of one of any of the C. elegans Arp2\/3 complex subunits (ARX-1, ARX-2, ARX-4, ARX-5, ARX-6 or ARX-7) or of N-WASP (WSP-1), hypodermal cell migration led by actin-rich filopodia formation is inhibited during ventral enclosure owing to the reduction of filamentous actin formation. However, there is no effect on differentiation of hypodermal cells and dorsal intercalation. Disruption of the function of ARX-1 and WSP-1 in hypodermal cells also resulted in hypodermal cell arrest during ventral enclosure, suggesting that their function is cell autonomous. WSP-1 protein activated Arp2\/3-mediated actin polymerization in vitro. Consistent with these results, the Arp2\/3 complex and WSP-1 colocalized at the leading edge of migrating hypodermal cells. The stable localization of WSP-1 was dependent on the presence of Arp2\/3 complex,suggesting an interaction between the Arp2\/3 complex and WSP-1 in vivo.<\/jats:p>","DOI":"10.1242\/jcs.00362","type":"journal-article","created":{"date-parts":[[2003,3,14]],"date-time":"2003-03-14T17:08:58Z","timestamp":1047661738000},"page":"1505-1518","source":"Crossref","is-referenced-by-count":103,"title":["Essential role of the<i>C. elegans<\/i>Arp2\/3 complex in cell migration during ventral enclosure"],"prefix":"10.1242","volume":"116","author":[{"given":"Mariko","family":"Sawa","sequence":"first","affiliation":[{"name":"Department of Biochemistry, Institute of Medical Science, University of Tokyo,4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan"},{"name":"CREST, Japan Science and Technology Corporation (JST), Minato-ku, Tokyo 108-8639, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shiro","family":"Suetsugu","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, Institute of Medical Science, University of Tokyo,4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan"},{"name":"CREST, Japan Science and Technology Corporation (JST), Minato-ku, Tokyo 108-8639, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Asako","family":"Sugimoto","sequence":"additional","affiliation":[{"name":"Laboratory for Developmental Genomics, RIKEN Center for Developmental Biology,Kobe, Hyogo 650-0047, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroaki","family":"Miki","sequence":"additional","affiliation":[{"name":"Cancer Genomics, Institute of Medical Science, University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan"},{"name":"PRESTO, Japan Science and Technology Corporation (JST), Minato-ku, Tokyo 108-8639, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masayuki","family":"Yamamoto","sequence":"additional","affiliation":[{"name":"Department of Biophysics and Biochemistry, Graduate School of Science,University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tadaomi","family":"Takenawa","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, Institute of Medical Science, University of Tokyo,4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan"},{"name":"CREST, Japan Science and Technology Corporation (JST), Minato-ku, Tokyo 108-8639, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"237","reference":[{"key":"2021042518314398700_REF1","doi-asserted-by":"crossref","unstructured":"Bailly, M., Ichetovkin, I., Grant, W., Zebda, N., Machesky, L. 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