Positively regulates the plasma membrane cation channel TRPM8 activity. Involved in the recruitment of TRPM8 to the cell surface. Promotes prostate cancer cell migration inhibition in a TRPM8-dependent manner. Interacts with TRPM8 (via N-terminus and C-terminus domains); the interaction inhibits TRPM8 channel activity. Interacts with TRPV6. Colocalizes with TRPM8 on the plasma membrane. Isoform 2 is expressed in the prostate and strongly expressed in cancerous prostate samples. The C-terminal region is necessary for the channel activity stimulation. Belongs to the TCAF family.