Transcription regulator required to maintain maternal and paternal gene imprinting, a process by which gene expression is restricted in a parent of origin-specific manner by epigenetic modification of genomic DNA and chromatin, including DNA methylation. Acts by controlling DNA methylation during the earliest multicellular stages of development at multiple imprinting control regions (ICRs) (PubMed:30602440). Acts together with ZFP57, but ZFP57 plays the predominant role in imprinting maintenance. In contrast, ZNF445 seems to be the major factor in human early embryonic imprinting maintenance (PubMed:30602440). Binds various differentially methylated regions (DMR). About one-third of zygotic mutants survived to adulthood. They do not exhibit any loss of methylation imprints at ICRs in the brain and liver at 12.5 dpc (PubMed:30602440). Double zygotic mutations of ZFP57 and ZNF445 are embryonically lethal and embryos show no gross morphological abnormalities but significant reduction in size and weight at 11.5 dpc, a phenotype more pronounced than in ZFP57 mutant mice with a more severe loss of impinting (PubMed:30602440). Belongs to the krueppel C2H2-type zinc-finger protein family. Extended N-terminus.