FAM134B engages ATG9A on the ER membrane.
(A) Schematic view of the predicted topology of FAM134B.
(B and C) (B) Insertion of the consensus sequence for N-glycosylation within the aa140–208 region of FAM134B did not consistently result in glycosylation. (C) Inset in (B). N-glyco, N-glycosylated FAM134B; no-glyco, non-glycosylated FAM134B.
(D and E) Immunoprecipitation of FAM134B pulled down only the immature and ER-based form of ATG9A. (E) Inset in (D). m, mature/N-glycosylated ATG9A; im, immature ATG9A.
(F) Imaris reconstruction of SIM showing interaction of Atg9a (cyan) and Fam134b (green). The ER (red) was labeled with ER3-mCherry. Interacting Atg9a and Fam134b are shown in gray.