ATPase family AAA domain-containing protein 3B (or ATAD3B) is a protein that in humans is encoded by the ATAD3B gene.[3] ATAD3 is part of the AAA protein family.[3] The function of ATAD3B is not yet well understood by the scientific community.
ATAD3B is associated with the mitochondria. The C terminus is anchored in the mitochondrial inter membrane space.[4]
The protein is linked with the pluripotency of stem cells. The ATAD3A gene is targeted by c-Myc[4] which is one of four factors needed to create induced pluripotent stem (i-PS) cells from mouse embryonic fibroblasts(MEFs).[5]
Its expression is linked to cell cycle function and tumor growth.[6] When ATAD3B was overexpressed, cell duplication took an extra three hours by spending a longer time in G1 phase.[6] Abnormal expression levels of ATAD3B has been linked to chemoresistance. Overexpression of ATAD3B was the found to be the strongest factor in breast cancer survival rates.[7]