UniProt functional annotation for Q9UBD5

UniProt code: Q9UBD5.

Organism: Homo sapiens (Human).
Taxonomy: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.
 
Function: Component of the origin recognition complex (ORC) that binds origins of replication. DNA-binding is ATP-dependent. The specific DNA sequences that define origins of replication have not been identified yet. ORC is required to assemble the pre-replication complex necessary to initiate DNA replication. Binds histone H3 and H4 trimethylation marks H3K9me3, H3K27me3 and H4K20me3. {ECO:0000269|PubMed:22427655, ECO:0000269|PubMed:31160578}.
 
Subunit: Component of ORC, a complex composed of at least 6 subunits: ORC1, ORC2, ORC3, ORC4, ORC5 and ORC6. ORC is regulated in a cell-cycle dependent manner. It is sequentially assembled at the exit from anaphase of mitosis and disassembled as cells enter S phase. {ECO:0000269|PubMed:12909626}.
Subcellular location: Nucleus {ECO:0000269|PubMed:31160578}. Chromosome {ECO:0000269|PubMed:31160578}.
Ptm: Multi-mono-ubiquitinated by OBI1; ubiquitination is important for efficient DNA replication origin site activation. Ubiquitination levels are low in mitotic and early G1-phAse cells and are induced in late G1-/early S-phase, peaking in S-phase and decrease toward the end of the cell cycle. {ECO:0000269|PubMed:31160578}.
Similarity: Belongs to the ORC3 family. {ECO:0000305}.

Annotations taken from UniProtKB at the EBI.