title: Invadolysin: a novel, conserved metalloprotease links mitotic structural rearrangements with cell migration.
abstract: The cell cycle is widely known to be regulated by networks of phosphorylation and ubiquitin-directed proteolysis. Here, we describe IX-14/invadolysin, a novel metalloprotease present only in metazoa, whose activity appears to be essential for mitotic progression. Mitotic neuroblasts of Drosophila melanogaster IX-14 mutant larvae exhibit increased levels of nuclear envelope proteins, monopolar and asymmetric spindles, and chromosomes that appear hypercondensed in length with a surrounding halo of loosely condensed chromatin. Zymography reveals that a protease activity, present in wild-type larval brains, is missing from homozygous tissue, and we show that IX-14/invadolysin cleaves lamin in vitro. The IX-14/invadolysin protein is predominantly found in cytoplasmic structures resembling invadopodia in fly and human cells, but is dramatically relocalized to the leading edge of migrating cells. Strikingly, we find that the directed migration of germ cells is affected in Drosophila IX-14 mutant embryos. Thus, invadolysin identifies a new family of conserved metalloproteases whose activity appears to be essential for the coordination of mitotic progression, but which also plays an unexpected role in cell migration.
authors.affiliation: Wellcome Trust Centre for Cell Biology, University of Edinburgh, Edinburgh EH9 3JR, Scotland, UK.
authors.forename: Brian
authors.initials: B
authors.lastname: McHugh
authors.forename: Sue A
authors.initials: SA
authors.lastname: Krause
authors.forename: Bin
authors.initials: B
authors.lastname: Yu
authors.forename: Anne-Marie
authors.initials: AM
authors.lastname: Deans
authors.forename: Sarah
authors.initials: S
authors.lastname: Heasman
authors.forename: Paul
authors.initials: P
authors.lastname: McLaughlin
authors.forename: Margarete M S
authors.initials: MM
authors.lastname: Heck
mesh_terms: D000818:Animals; D002465:Cell Movement / Q000502:physiology*; D002467:Cell Nucleus / Q000235:genetics / Q000378:metabolism*; D002478:Cells, Cultured; D002869:Chromosome Aberrations / Q000196:embryology; D017124:Conserved Sequence / Q000235:genetics; D003593:Cytoplasm / Q000378:metabolism; D018076:DNA, Complementary / Q000032:analysis / Q000235:genetics; D029721:Drosophila Proteins / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D004331:Drosophila melanogaster; D005854:Germ Cells / Q000166:cytology / Q000378:metabolism; D006367:HeLa Cells; D006801:Humans; D034904:Lamin Type A / Q000378:metabolism; D007814:Larva / Q000166:cytology / Q000254:growth & development / Q000378:metabolism; D008264:Macrophages; D008666:Metalloendopeptidases / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D045726:Metalloproteases / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D008938:Mitosis / Q000502:physiology*; D008958:Models, Molecular; D008969:Molecular Sequence Data; D009154:Mutation / Q000235:genetics; D009685:Nuclear Envelope / Q000378:metabolism; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid; D008941:Spindle Apparatus / Q000235:genetics / Q000378:metabolism; D013234:Stem Cells / Q000166:cytology / Q000378:metabolism
chemical_list: D018076:DNA, Complementary; D029721:Drosophila Proteins; D034904:Lamin Type A; D045726:Metalloproteases; D008666:Metalloendopeptidases; C495212:invadolysin, Drosophila; C495213:invadolysin, human