Is involved in nerve myelination and is required for the integrity of nodes of Ranvier (By similarity). It probably functions as a Rab effector in the regulation of endocytic recycling (PubMed:20028792, PubMed:20826437). {ECO:0000250|UniProtKB:Q80VA5, ECO:0000269|PubMed:20028792, ECO:0000269|PubMed:20826437}. This is the function of ENSG00000169247 (SH3TC2, SH3 domain and tetratricopeptide repeats 2).