Figure 4. Hyperphosphorylation Reduces the Transcriptional Activity of NEUROG3.
(A) PAX4 minienhancer-driven luciferase transcription is reduced by NEUROG3 phosphorylation. HeLa cells were cotransfected with the mini-enhancer, an Hnf1α overexpression construct, and FLAG-tag control (FLAG) or WT or mutant forms of NEUROG3.
(B) mPAC cells were transfected with FLAG-tag control, WT-NEUROG3, or the indicated mutants and analyzed for expression of endogenous Pax4 by qPCR.
(C) mPAC cells were transfected with FLAG-tag control, WT-NEUROG3, or the indicated mutants and analyzed for expression of endogenous NeuroD1 by qPCR.
(D) mPAC cells were transfected with FLAG-tag control, WT-NEUROG3, or the indicated mutants and analyzed for expression of endogenous Somatostatin (Sst) by qPCR.
Data are presented as mean ± SEM. n = 3. *p < 0.05 by one-way ANOVA and Dunnett’s post hoc test. See also Figures S3 and S4.