Tctex-1 is a dynein light chain. It has been shown that Tctex-1 can bind to the cytoplasmic tail of rhodopsin. C-terminal rhodopsin mutations responsible for retinitis pigmentosa inhibit this interaction.

1: tctex-1: a candidate gene family for a mouse t complex sterility locus. Lader E, Ha HS, O'Neill M, Artzt K, Bennett D; Cell 1989;58:969-979. PMID:2570638

2: Rhodopsin's carboxy-terminal cytoplasmic tail acts as a membrane receptor for cytoplasmic dynein by binding to the dynein light chain Tctex-1. Tai AW, Chuang JZ, Bode C, Wolfrum U, Sung CH; Cell 1999;97:877-887. PMID:10399916