Journal: The Journal of Cell Biology
Article Title: α-Syntrophin regulates ARMS localization at the neuromuscular junction and enhances EphA4 signaling in an ARMS-dependent manner
doi: 10.1083/jcb.200412008
Figure Lengend Snippet: ARMS and α-syntrophin enhanced the EphA4-induced Jak/Stat activation. (A) COS7 cells were transfected with EphA4, EphA4 KD mutant, or ARMS, and cell lysate was immunoblotted with antibodies against phosphorylated Tyr 1007/1008 of mouse Jak2, Tyr 1054/1055 of human Tyk2, Tyr 701 of Stat1, and Thr 202 /Tyr 204 of ERK1/2. p-Tyr; phosphorylated Tyr. (B) Quantification of the Western blots. y axis represents the fold change of tyrosine phosphorylation. n = 3; *, P < 0.05; **, P < 0.005. (C) COS7 cells were transfected with EphA4, ARMS, α-syntrophin, or α-syntrophin mPDZ, and cell lysate was immunoblotted with antibodies against phosphorylated Tyr 1007/1008 of mouse Jak2, Tyr 1054/1055 of human Tyk2, Tyr 701 of Stat1, and Thr 202 /Tyr 204 of ERK1/2. (D) Quantification of the Western blots. n = 3; *, P < 0.05; **, P < 0.005. Error bars represent the SEM.
Article Snippet: Polyclonal anti-HA antibodies, EphA4 antibody (sc-921), and Jak2 antibody (sc-278) were purchased from Santa Cruz Biotechnology, Inc., and the mAb that recognizes the α-isoform of Stat1 was obtained from Zymed Laboratories.
Techniques: Activation Assay, Transfection, Mutagenesis, Western Blot, Phospho-proteomics