Available structures
PDBOrtholog search: PDBe RCSB
Aliases DDX5, G17P1, HLR1, HUMP68, p68, DEAD-box helicase 5
External IDs MGI: 105037 HomoloGene: 6797 GeneCards: DDX5
RNA expression pattern

More reference expression data
Species Human Mouse









RefSeq (mRNA)



RefSeq (protein)



Location (UCSC) Chr 17: 64.5 – 64.51 Mb Chr 11: 106.78 – 106.79 Mb
PubMed search [1] [2]
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Probable ATP-dependent RNA helicase DDX5 also known as DEAD box protein 5 or RNA helicase p68 is an enzyme that in humans is encoded by the DDX5 gene.[3]


DEAD box proteins, characterized by the conserved motif Asp-Glu-Ala-Asp (DEAD), are putative RNA helicases. They are implicated in a number of cellular processes involving alteration of RNA secondary structure, such as translation initiation, nuclear and mitochondrial splicing, and ribosome and spliceosome assembly. Based on their distribution patterns, some members of this family are believed to be involved in embryogenesis, spermatogenesis, and cellular growth and division. This gene encodes a DEAD box protein, which is an RNA-dependent ATPase, and also a proliferation-associated nuclear antigen, specifically reacting with the simian virus 40 tumor antigen. This gene consists of 13 exons, and alternatively spliced transcripts containing several intron sequences have been detected, but no isoforms encoded by these transcripts have been identified.[3]


DDX5 has been shown to interact with:


  1. "Human PubMed Reference:".
  2. "Mouse PubMed Reference:".
  3. 1 2 "Entrez Gene: DDX5 DEAD (Asp-Glu-Ala-Asp) box polypeptide 5".
  4. Akileswaran L, Taraska JW, Sayer JA, Gettemy JM, Coghlan VM (May 2001). "A-kinase-anchoring protein AKAP95 is targeted to the nuclear matrix and associates with p68 RNA helicase". J. Biol. Chem. 276 (20): 17448–54. doi:10.1074/jbc.M101171200. PMID 11279182.
  5. Ogilvie VC, Wilson BJ, Nicol SM, Morrice NA, Saunders LR, Barber GN, Fuller-Pace FV (March 2003). "The highly related DEAD box RNA helicases p68 and p72 exist as heterodimers in cells". Nucleic Acids Res. 31 (5): 1470–80. doi:10.1093/nar/gkg236. PMC 149829Freely accessible. PMID 12595555.
  6. Wilson BJ, Giguère V (2007). "Identification of novel pathway partners of p68 and p72 RNA helicases through Oncomine meta-analysis". BMC Genomics. 8: 419. doi:10.1186/1471-2164-8-419. PMC 3225811Freely accessible. PMID 18005418.
  7. Endoh H, Maruyama K, Masuhiro Y, Kobayashi Y, Goto M, Tai H, Yanagisawa J, Metzger D, Hashimoto S, Kato S (August 1999). "Purification and Identification of p68 RNA Helicase Acting as a Transcriptional Coactivator Specific for the Activation Function 1 of Human Estrogen Receptor α". Mol. Cell. Biol. 19 (8): 5363–72. PMC 84379Freely accessible. PMID 10409727.
  8. Rossow KL, Janknecht R (January 2003). "Synergism between p68 RNA helicase and the transcriptional coactivators CBP and p300". Oncogene. 22 (1): 151–6. doi:10.1038/sj.onc.1206067. PMID 12527917.
  9. Nicol SM, Causevic M, Prescott AR, Fuller-Pace FV (June 2000). "The nuclear DEAD box RNA helicase p68 interacts with the nucleolar protein fibrillarin and colocalizes specifically in nascent nucleoli during telophase". Exp. Cell Res. 257 (2): 272–80. doi:10.1006/excr.2000.4886. PMID 10837141.
  10. Wilson BJ, Bates GJ, Nicol SM, Gregory DJ, Perkins ND, Fuller-Pace FV (August 2004). "The p68 and p72 DEAD box RNA helicases interact with HDAC1 and repress transcription in a promoter-specific manner". BMC Mol. Biol. 5: 11. doi:10.1186/1471-2199-5-11. PMC 514542Freely accessible. PMID 15298701.
  11. 1 2 3 Watanabe M, Yanagisawa J, Kitagawa H, Takeyama K, Ogawa S, Arao Y, Suzawa M, Kobayashi Y, Yano T, Yoshikawa H, Masuhiro Y, Kato S (March 2001). "A subfamily of RNA-binding DEAD-box proteins acts as an estrogen receptor α coactivator through the N-terminal activation domain (AF-1) with an RNA coactivator, SRA". EMBO J. 20 (6): 1341–52. doi:10.1093/emboj/20.6.1341. PMC 145523Freely accessible. PMID 11250900.
  12. Bates GJ, Nicol SM, Wilson BJ, Jacobs AM, Bourdon JC, Wardrop J, Gregory DJ, Lane DP, Perkins ND, Fuller-Pace FV (February 2005). "The DEAD box protein p68: a novel transcriptional coactivator of the p53 tumour suppressor". EMBO J. 24 (3): 543–53. doi:10.1038/sj.emboj.7600550. PMC 548656Freely accessible. PMID 15660129.
  13. Yao H, Brick K, Evrard Y, Xiao T, Camerini-Otero RD, Felsenfeld G (2010). "Mediation of CTCF transcriptional insulation by DEAD-box RNA-binding protein p68 and steroid receptor RNA activator SRA". Genes Dev. 24 (22): 2543–2555. doi:10.1101/gad.1967810. PMC 2975930Freely accessible. PMID 20966046.

Further reading

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