The function of ENSG00000166575 (TMEM135, transmembrane protein 135) is as follows. Involved in mitochondrial metabolism by regulating the balance between mitochondrial fusion and fission. May act as a regulator of mitochondrial fission that promotes DNM1L-dependent fission through activation of DNM1L. May be involved in peroxisome organization. {ECO:0000250|UniProtKB:Q5U4F4, ECO:0000250|UniProtKB:Q9CYV5}.