Depletion of INTS11 produces a similar phenotype to that observed upon depletion of INTS4. Depletion of INTS11 produces a similar phenotype to that observed.

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Depletion of INTS11 produces a similar phenotype to that observed upon depletion of INTS4. Depletion of INTS11 produces a similar phenotype to that observed upon depletion of INTS4. (A) Effects of INTS11 knockdown on Cajal body components. INTS11-depleted HeLa cells were fixed with 4% PFA, and coilin (green) and SMN (red) were immunostained using their specific antibodies. (B) Percentage of cells with nucleolar accumulation of coilin and cytoplasmic granules containing SMN in control RNAi-treated cells and INTS4 RNAi-treated cells. The values are means ± s.d. (error bars) of five independent experiments. More than 200 cells were counted in each experiment. (C) RNA immuno-FISH of U2 snRNA (green) was performed on INTS11-depleted HeLa cells. Arrow indicates intense U2 snRNA signals in Cajal bodies. (D) The location of the RNA probe for premature U2 snRNA used in the RNA protection assay (RPA) is shown. The probe contains both mature and premature U2 snRNA sequences cleaved by the integrator. Numbers indicate the distance from the U2 snRNA start site (base). (E) RPA of U2 snRNAs extracted from cells after undergoing RNAi with control, INTS4 and INTS11 siRNA. Total RNA (10 μg) was analyzed using radiolabelled U2 snRNA probes. The band positions of premature U2 snRNAs and mature U2 snRNAs are indicated by arrows. (F) The primary to mature snRNA ratio in RNAi cells. The ratio was estimated by the intensity of the band for premature and mature U2 snRNAs shown in E (n=3; error bars represent the mean ± s.d.). (G) Fractionation of the integrator complex from nuclear extracts. Nuclear extracts (NEs) were prepared from HeLa cells treated with control or INTS4 siRNAi. The NEs were fractionated through a 20–50% glycerol gradient by centrifugation. The proteins in each fraction were separated on 12% SDS polyacrylamide gels, transferred to PVDF membrane and immunoblotted using anti-INTS11 and anti-INTS4 antibodies. Fraction numbers and the positions of molecular mass markers are indicated above each gel. Scale bars: 5 μm. Hideaki Takata et al. J Cell Sci 2012;125:166-175 © 2012.