Disease‐causing mutations influence the association of CSPα with partner proteins Disease‐causing mutations influence the association of CSPα with partner.

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Disease‐causing mutations influence the association of CSPα with partner proteins Disease‐causing mutations influence the association of CSPα with partner proteins AOverview of the targeted PPI screen. CSPα‐mCit‐PA was screened in two independent experiments against a focused library of 125 NL‐tagged presynaptic proteins. Venn diagram depicting the 42 identified CSPα interaction partners. Domain structure of CSPα. The J‐domain and the cysteine‐string domain (CSD) are depicted. The ANCL‐causing mutations ΔL116 and L115R are indicated.B, CTukey box plots of the mean cBRET (B) and cLuC ratios (C) obtained from two independent PPI experiments with wild‐type CSPα‐mCit‐PA and its mutant variants. Significance was calculated by one‐way ANOVA followed by Dunnett's multiple comparisons post hoc test. *P < 0.05.DNumber of screened presynaptic proteins manually annotated according to their function and localization in the presynaptic terminal. Number of proteins identified with wild‐type (wt) CSPα‐mCit‐PA or its mutant variants (ΔL116 and L115R) are indicated.EInfluence of mutations in CSPα (ΔL116, L115R) on the interactions with ZDHHC17 in primary hippocampal neurons. BRET and LuC ratios were systematically quantified for interactions with wild‐type and mutant CSPα fusion proteins. Data are representative of three independent experiments. All values are mean ± s.d. Significance was calculated by two‐way ANOVA followed by Dunnett's multiple comparisons post hoc test; **P < 0.005; ***P < 0.001.FImmunoblot analysis of SHEP cells transfected with plasmids encoding wild‐type CSPα‐mCit‐PA and mutant variants. Blot was developed with an anti‐CSP antibody; loading control: anti‐Histone‐H3 antibody. Arrowhead and bracket indicate monomeric CSPα‐mCit‐PA and SDS‐insoluble protein aggregates, respectively.GImmunofluorescence image of SHEP cells co‐transfected with NL‐ZDHHC17 and CSPα‐mCit‐wt, ‐ΔL116 or ‐L115R constructs lacking the PA‐tag. NL‐ZDHHC17 was stained with an anti‐NanoLuc antibody. Scale bar: 20 μm. Philipp Trepte et al. Mol Syst Biol 2018;14:e8071 © as stated in the article, figure or figure legend