Along with MFN2, MIGA2 and PLD6 promotes mitochondrial clustering and fusion (PubMed:38843396). May play a role in mitochondrial import of proteins, such as that of SLC25A19 (PubMed:40105103). {ECO:0000269|PubMed:38843396, ECO:0000269|PubMed:40105103}. This is the function of TRABD (TraB domain containing, Ensembl gene identifier ENSG00000170638).