Probable component of the MCM2-7 complex (MCM complex) that may function as a DNA helicase and which is essential to undergo a single round of replication initiation and elongation per cell cycle in eukaryotic cells (By similarity). Required for megagametophyte and embryo development. ATP + H2O = ADP + H(+) + phosphate Component of the minichromosome maintenance (MCM) complex, a heterotetramer composed of MCM2, MCM3, MCM4, MCM5, MCM6 and MCM7. Interacts with ETG1. Localized in the nucleus during G1, S and G2 phases of the cell cycle, and released into the cytoplasmic compartment during mitosis. Expressed in shoot apex and flower buds. Accumulates in nucleus during the G1 phase of the cell cycle. During mitosis, the protein rapidly disappears, returning to daughter nuclei during G1. By both rootknot and cyst nematode infections. Belongs to the MCM family.