Key regulator of abscission step in cytokinesis: part of the cytokinesis checkpoint, a process required to delay abscission to prevent both premature resolution of intercellular chromosome bridges and accumulation of DNA damage. Together with CHMP4C, required to retain abscission-competent VPS4 (VPS4A and/or VPS4B) at the midbody ring until abscission checkpoint signaling is terminated at late cytokinesis. Deactivation of AURKB results in dephosphorylation of CHMP4C followed by its dissociation from ZFYVE19/ANCHR and VPS4 and subsequent abscission. Interacts (via MIM1-B) with VPS4A; interaction takes place at the midbody ring following cytokinesis checkpoint activation. Localizes mainly on centrosomes in interphase and early mitosis. Localizes at the cleavage furrow and midbody ring in late mitosis and cytokinesis. Detected in brain, heart, skeletal muscle, kidney and liver. The FYVE-type zinc finger mediates binding to phosphatidylinositol-3-phosphate (PtdIns(3)P). The MIM1-B motif mediates interaction with VPS4A. A chromosomal aberration involving ZFYVE19 is associated with acute myeloblastic leukemia (AML). Translocation t(11;15)(q23;q14) with KMT2A/MLL1 (PubMed:12618766). Phosphorylated in vitro at Ser-22 by AURKB; however, phosphorylation at this site could not be confirmed in vivo. Truncated N-terminus. Truncated N-terminus.