PMID- 9245788 OWN - NLM STAT- MEDLINE DCOM- 19970828 LR - 20240214 IS - 0021-9525 (Print) IS - 1540-8140 (Electronic) IS - 0021-9525 (Linking) VI - 138 IP - 3 DP - 1997 Aug 11 TI - Drosophila myoblast city encodes a conserved protein that is essential for myoblast fusion, dorsal closure, and cytoskeletal organization. PG - 589-603 AB - The Drosophila myoblast city (mbc) locus was previously identified on the basis of a defect in myoblast fusion (Rushton et al., 1995. Development [Camb.]. 121:1979-1988). We describe herein the isolation and characterization of the mbc gene. The mbc transcript and its encoded protein are expressed in a broad range of tissues, including somatic myoblasts, cardial cells, and visceral mesoderm. It is also expressed in the pole cells and in ectodermally derived tissues, including the epidermis. Consistent with this latter expression, mbc mutant embryos exhibit defects in dorsal closure and cytoskeletal organization in the migrating epidermis. Both the mesodermal and ectodermal defects are reminiscent of those induced by altered forms of Drac1 and suggest that mbc may function in the same pathway. MBC bears striking homology to human DOCK180, which interacts with the SH2-SH3 adapter protein Crk and may play a role in signal transduction from focal adhesions. Taken together, these results suggest the possibility that MBC is an intermediate in a signal transduction pathway from the rho/rac family of GTPases to events in the cytoskeleton and that this pathway may be used during myoblast fusion and dorsal closure. FAU - Erickson, M R AU - Erickson MR AD - Department of Biochemistry and Molecular Biology and Center for Gene Regulation, The Pennsylvania State University, University Park, Pennsylvania 16802, USA. FAU - Galletta, B J AU - Galletta BJ FAU - Abmayr, S M AU - Abmayr SM LA - eng SI - GENBANK/AA110899 SI - GENBANK/AF007805 SI - GENBANK/D86964 SI - GENBANK/Z81032 SI - GENBANK/Z81054 GR - R01 AR044274/AR/NIAMS NIH HHS/United States GR - R01 AR44274/AR/NIAMS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Cell Biol JT - The Journal of cell biology JID - 0375356 RN - 0 (Cytoskeletal Proteins) RN - 0 (DOCK1 protein, human) RN - 0 (Drosophila Proteins) RN - 0 (Insect Proteins) RN - 0 (Proteins) RN - 0 (mbc protein, Drosophila) RN - EC 3.6.5.2 (rac GTP-Binding Proteins) SB - IM MH - Amino Acid Sequence MH - Animals MH - Cell Fusion MH - Cell Movement MH - *Cytoskeletal Proteins MH - Cytoskeleton/*ultrastructure MH - Drosophila/chemistry/embryology/*genetics MH - *Drosophila Proteins MH - Ectoderm/metabolism MH - Embryo, Nonmammalian/*metabolism MH - Embryonic Development MH - Epidermis/embryology/metabolism MH - Female MH - Gene Expression Regulation, Developmental MH - Genes, Insect MH - Humans MH - Insect Proteins/chemistry/*genetics/*physiology MH - Male MH - Mesoderm/metabolism MH - Molecular Sequence Data MH - Molecular Weight MH - Muscle Fibers, Skeletal/*cytology/metabolism MH - Proteins/chemistry MH - Sequence Alignment MH - Signal Transduction MH - *rac GTP-Binding Proteins PMC - PMC2141626 EDAT- 1997/08/11 00:00 MHDA- 1997/08/11 00:01 PMCR- 1998/02/11 CRDT- 1997/08/11 00:00 PHST- 1997/08/11 00:00 [pubmed] PHST- 1997/08/11 00:01 [medline] PHST- 1997/08/11 00:00 [entrez] PHST- 1998/02/11 00:00 [pmc-release] AID - 10.1083/jcb.138.3.589 [doi] PST - ppublish SO - J Cell Biol. 1997 Aug 11;138(3):589-603. doi: 10.1083/jcb.138.3.589.