Required for G1/S transition. Recruits and stabilizes the origin recognition complex (ORC) onto chromatin during G1 to establish pre-replication complex (preRC) and to heterochromatic sites in post-replicated cells. Binds a combination of DNA and histone methylation repressive marks on heterochromatin. Binds histone H3 and H4 trimethylation marks H3K9me3; H3K20me3 and H4K27me3 in a cooperative manner with DNA methylation. Required for silencing of major satellite repeats. May be important ORC2; ORC3 and ORC4 stability. {ECO:0000269|PubMed:20850016; ECO:0000269|PubMed:20932478; ECO:0000269|PubMed:21029866; ECO:0000269|PubMed:22427655; ECO:0000269|PubMed:22645314}.