Braun et al. [14] reported a complete list of mutations in 4 genes in OSGEP, TP53RK, TPRKB, or LAGE3, encoding the 4 subunits of the KEOPS complex in 33 probands of 30 families with GMS with nephrotic syndrome and primary microcephaly. Here, TPRKB is linked to Primary microcephaly.