The WCCH motif is found in a retrotransposons and Gemini viruses. A specific function has not been associated to this motif [1].

1: Pyret, a Ty3/Gypsy retrotransposon in Magnaporthe grisea contains an extra domain between the nucleocapsid and protease domains. Nakayashiki H, Matsuo H, Chuma I, Ikeda K, Betsuyaku S, Kusaba M, Tosa Y, Mayama S; Nucleic Acids Res 2001;29:4106-4113. PMID:11600699