fbxa-153 encodes a protein with an N-terminal F-box domain and a C-terminal FTH domain; FBXA-153 has no obvious non-nematode orthologs; FBXA-153 shares N-terminal UNC-13 binding, and thus may share at least some functions, with ERI-1, W04D2.6, and Y55F3AM.13; FBXA-153 has no obvious function in mass RNAi assays.