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Available structures
PDB Ortholog search: PDBe RCSB
Aliases ORC6, ORC6L, origin recognition complex subunit 6
External IDs MGI: 1929285 HomoloGene: 8635 GeneCards: ORC6
Gene location (Human)
Chromosome 16 (human)
Chr. Chromosome 16 (human)[1]
Chromosome 16 (human)
Genomic location for ORC6
Genomic location for ORC6
Band 16q11.2 Start 46,689,643 bp[1]
End 46,698,394 bp[1]
RNA expression pattern
PBB GE ORC6L 219105 x at fs.png
More reference expression data
Species Human Mouse
RefSeq (mRNA)



RefSeq (protein)



Location (UCSC) Chr 16: 46.69 – 46.7 Mb Chr 8: 85.3 – 85.31 Mb
PubMed search [3] [4]
View/Edit Human View/Edit Mouse
Origin recognition complex subunit 6 (ORC6)
Symbol ORC6
Pfam PF05460
InterPro IPR008721

Origin recognition complex subunit 6 is a protein that in humans is encoded by the ORC6 (ORC6L) gene.[5][6]


The origin recognition complex (ORC) is a highly conserved six subunit protein complex essential for the initiation of the DNA replication in eukaryotic cells. Studies in yeast demonstrated that ORC binds specifically to origins of replication and serves as a platform for the assembly of additional initiation factors such as Cdc6 and Mcm proteins.


The protein encoded by this gene is a subunit of the ORC complex. It has been shown that this protein and ORC1 are loosely associated with the core complex consisting of ORC2, -3, -4 and -5. Gene silencing studies with small interfering RNA demonstrated that this protein plays an essential role in coordinating chromosome replication and segregation with cytokinesis.[6]


ORC6 has been shown to interact with MCM5,[7] ORC2,[7][8] Replication protein A1,[7] ORC4,[7] DBF4,[7] ORC3,[7][8] CDC45-related protein,[7] MCM4[7] and Cell division cycle 7-related protein kinase.[7]


  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000091651 - Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000031697 - Ensembl, May 2017
  3. ^ "Human PubMed Reference:". 
  4. ^ "Mouse PubMed Reference:". 
  5. ^ Dhar SK, Dutta A (Nov 2000). "Identification and characterization of the human ORC6 homolog". J Biol Chem. 275 (45): 34983–8. doi:10.1074/jbc.M006069200. PMID 10945994. 
  6. ^ a b "Entrez Gene: ORC6L origin recognition complex, subunit 6 like (yeast)". 
  7. ^ a b c d e f g h i Kneissl, Margot; Pütter Vera; Szalay Aladar A; Grummt Friedrich (Mar 2003). "Interaction and assembly of murine pre-replicative complex proteins in yeast and mouse cells". J. Mol. Biol. England. 327 (1): 111–28. doi:10.1016/S0022-2836(03)00079-2. ISSN 0022-2836. PMID 12614612. 
  8. ^ a b Vashee, S; Simancek P; Challberg M D; Kelly T J (Jul 2001). "Assembly of the human origin recognition complex". J. Biol. Chem. United States. 276 (28): 26666–73. doi:10.1074/jbc.M102493200. ISSN 0021-9258. PMID 11323433. 

Further reading[edit]