Figure 2.
mtm promotes hemocyte protrusions and essential roles in Drosophila. (A) Larval lethal mtm mutant alleles: z2-4747 mutation in CX5R catalytic motif, Δ77 and Δ210 deletions, and UAS-IRmtm RNAi hairpins. (B) Percentage of lethal progeny for mtm alleles or hemocyte-targeted RNAi (PxnGAL4; CgGAL4) rescued to viability with mtm or human MTMR2 cDNA. (C–F) F-actin in primary hemocytes (top) and zoom of cell edges (bottom). (C) Normal radial protrusions in mtmΔ77/+. (D and E) Lack of protrusions in mtmΔ77/mtmz2-4747 and hemocyte mtm RNAi. (F) Increased number of protrusions in mtm overexpression. (G) Percentage of hemocytes with normal, no, or ectopic protrusions. (H, right) Lack of hemocyte protrusions with 1-d induced mtm RNAi (18 to 29°C shift). IR-mtm/+; Pxn-GAL4/+. (I) SCAR protein in control (top) and enriched along cell cortex in mtm-depleted hemocytes (bottom, arrowheads; Cg-GAL4/IRmtm). Boxed areas are shown at magnified views in the panels below.