MmsA interacts with p62 for STING autophagy degradation. (A) HEK293T cells were transfected with Flag-STING and Myc-p62, with or without Flag-MmsA, for 48 h. Cell lysates were immunoprecipitated with the anti-Myc antibody, followed by immunoblotting with the indicated antibodies. (B) Cell lysates of RAW-MmsA and RAW-Vector were immunoprecipitated with the anti-p62 antibody and analyzed by immunoblotting with the indicated antibodies. (C) RAW-MmsA and RAW-Vector cells were transfected with siRNA-control and siRNA-p62 for 48 h and analyzed by immunoblotting with the indicated antibodies. (D) HEK293T cells were transfected with pFlag-MmsA or its mutants along with pMyc-p62 for 48 h. Cell lysates were immunoprecipitated with the anti-Flag antibody and then immunoblotted with the indicated antibodies. (E) HEK293T cells were transfected with pMyc-p62, pFlag-MmsA, and pMyc-human-STING or Myc-Vector for 48 h. Cell lysates were immunoprecipitated with the anti-Flag antibody and then immunoblotted with the indicated antibodies.