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. Required for silencing of major satellite repeats. May be important ORC2, ORC3 and ORC4 stability (By similarity). Component of the ORC complex. The entire WD repeat region is required for the interaction with ORC complex components, as well as for association with chromatin and for binding to histone H3 and H4 trimethylation marks H3K9me3 and H4K20me3. Belongs to the LRWD1 family. Extended N-terminus.