Journal: The Journal of Clinical Investigation

Article Title: UNC45A deficiency causes microvillus inclusion disease–like phenotype by impairing myosin VB–dependent apical trafficking

doi: 10.1172/JCI154997

Figure Lengend Snippet: ( A ) Pedigree of families with AR UNC45A deficiency (filled shapes indicate affected individuals). ( B ) Schematic representation of UNC45A protein showing location of the variants identified in this study. ( C ) Western blot analysis of UNC45A protein in HEK293T cells transfected with EV, WT, and mutant alleles ( n = 2). ( D ) Ribbon representation of the human UNC45a model generated by MODELLER (based on the D . melanogaster and C . elegans UNC45 protein structures) showing its domain architecture. The variants were modeled in silico using Chimera. The location and a close-up view of each variant are shown. For the L237P and A838P mutations, hydrogen bonds are depicted by dark-blue dashed lines. For the T230R and E728K mutations, Van der Waals radii are represented for each atom and steric clashes occurring in the structure are shown with brown dashed lines. Coulombic surface representations are also shown. Red surface indicates the lowest electrostatic potential energy and blue the highest. Locations of the mutated residue are highlighted by a black circle. Distances are indicated using black dotted lines.

Article Snippet: For complementation studies, human UNC45A (NM_018671.3, RC200151L1, Origene) was subcloned in pLVX-EF1α-IRES-mCherry vector (631987, Clontech).

Techniques: Western Blot, Transfection, Mutagenesis, Generated, In Silico, Variant Assay, Residue

Journal: The Journal of Clinical Investigation

Article Title: UNC45A deficiency causes microvillus inclusion disease–like phenotype by impairing myosin VB–dependent apical trafficking

doi: 10.1172/JCI154997

Figure Lengend Snippet: ( A ) Volcano plot showing proteins enriched in the myc-tagged UNC45A WT immunoprecipitates over the myc-tagged EV control identified by mass spectrometry in 3 independent pull-down assays. The difference of the average of the logarithm of Label Free Quantification (LQF) intensities (WT vs. EV) is plotted against negative logarithmic P values of a 2-sided, 2-sample Welsh t test. The hyperbolic curve delimitates significantly enriched proteins from common hits. High LFQ hits of interest are indicated in black (HSP90 family), in purple (Myosin protein family), and in green (Actin protein family). ( B ) Accumulation of myosin VB aggregates (aggresomes) in UNC45A KO cells treated with MG-132 (10 μM) overnight. Scale bars: 10 μm. n = 3. Nuclei are stained with Nucblue (blue).

Article Snippet: For complementation studies, human UNC45A (NM_018671.3, RC200151L1, Origene) was subcloned in pLVX-EF1α-IRES-mCherry vector (631987, Clontech).

Techniques: Control, Mass Spectrometry, Quantitative Proteomics, Staining

Journal: The Journal of Clinical Investigation

Article Title: UNC45A deficiency causes microvillus inclusion disease–like phenotype by impairing myosin VB–dependent apical trafficking

doi: 10.1172/JCI154997

Figure Lengend Snippet: ( A ) Confocal images of polarized NT control and Unc45A KO Caco-2 cells grown on a filter and stained for an apical brush border marker DPPIV and actin. ( B ) Actin staining in polarized Caco-2 cells. Nuclei were visualized with HOECHST. Arrows on the left mark the corresponding XY and XZ planes. Scale bars: 20 μm. Panels A and B were from the same experiment. ( C ) NT control and UNC45A KO Caco-2 cells complemented or not with WT or mutant alleles were cultured in 3D for 5 days to form cysts. Nuclei are stained with Nucblue (blue); actin is stained with phalloidin AF 455 (red). Single confocal sections through the middle of the cyst are shown. Scale bars: 10 μm. ( D ) Single-lumen cysts were counted in each experiment. Results from 3 independent experiments (35 cysts each) are shown, 1-way ANOVA. **** P < 0.0001.

Article Snippet: For complementation studies, human UNC45A (NM_018671.3, RC200151L1, Origene) was subcloned in pLVX-EF1α-IRES-mCherry vector (631987, Clontech).

Techniques: Control, Staining, Marker, Mutagenesis, Cell Culture

Journal: The Journal of Clinical Investigation

Article Title: UNC45A deficiency causes microvillus inclusion disease–like phenotype by impairing myosin VB–dependent apical trafficking

doi: 10.1172/JCI154997

Figure Lengend Snippet: ( A ) Bright-field images of control, P1, P4, and UNC45A KO1 3D organoids. Scale bar: 5000 μm. ( B ) F-actin staining revealing MVIs in the small subset of P1, P4, and UNC45A KO 3D organoids that display a central lumen. Scale bar: 20 μm. ( C ) STED image of F-actin at the apical pole of 2D enterocyte cultures derived from control, P1, P4, and UNC45A KO1 organoids after a 21-day culture on filters. Scale bars: 1 μm. L, lumen.

Article Snippet: For complementation studies, human UNC45A (NM_018671.3, RC200151L1, Origene) was subcloned in pLVX-EF1α-IRES-mCherry vector (631987, Clontech).

Techniques: Control, Staining, Derivative Assay

Journal: The Journal of Clinical Investigation

Article Title: UNC45A deficiency causes microvillus inclusion disease–like phenotype by impairing myosin VB–dependent apical trafficking

doi: 10.1172/JCI154997

Figure Lengend Snippet: ( A – C ) Confocal microscopy analysis of the intestinal bulb of WT and unc45a –/– mutant larvae stained for villin and pERM ( A ), F-actin (phalloidin) ( B ), and Rab11 ( C ) at 5 dpf. Scale bars: 20 μm. Boxes showing microvillus-like inclusions are enlarged ×4. ( D and E ) TEMs of thin sections of intestinal bulb of 5 dpf WT and unc45a –/– mutant larvae showing defects in the organization of the brush border. Scale bars: 2 μm ( D ); 0.5 μm ( E ). Quantitative analysis showing decrease in microvillus length and density in unc45a –/– enterocytes as compared with WT enterocytes. Data are represented as mean + SD. **** P < 0.001, t test. N nucleus; MV microvilli.

Article Snippet: For complementation studies, human UNC45A (NM_018671.3, RC200151L1, Origene) was subcloned in pLVX-EF1α-IRES-mCherry vector (631987, Clontech).

Techniques: Confocal Microscopy, Mutagenesis, Staining