Protein: Probable ATP-dependent RNA helicase DDX56 (EC 3.6.4.13) (ATP-dependent 61 kDa nucleolar RNA helicase) (DEAD box protein 21) (DEAD box protein 56) (Q9NY93)
Organism: Homo sapiens (Human)
Function: Nucleolar RNA helicase that plays a role in various biological processes including innate immunity, ribosome biogenesis or nucleolus organization. Plays an essential role in maintaining nucleolar integrity in planarian stem cells. Maintains embryonic stem cells proliferation by conventional regulation of ribosome assembly and interaction with OCT4 and POU5F1 complex (By similarity). Regulates antiviral innate immunity by inhibiting the virus-triggered signaling nuclear translocation of IRF3. Mechanistically, acts by disrupting the interaction between IRF3 and importin IPO5. May play a role in later stages of the processing of the pre-ribosomal particles leading to mature 60S ribosomal subunits. Has intrinsic ATPase activity.
Subcellular location: Nucleus, nucleolus {ECO:0000269|PubMed:12429849, ECO:0000269|PubMed:22925334, ECO:0000269|PubMed:31340999, ECO:0000269|PubMed:33789112}.
Sequence: MEDSEALGFEHMGLDPRLLQAVTDLGWSRPTLIQEKAIPLALEGKDLLARARTGSGKTAAYAIPMLQLLLHRKATGPVVEQAVRGLVLVPTKELARQAQSMIQQLATYCARDVRVANVSAAEDSVSQRAVLMEKPDVVVGTPSRILSHLQQDSLKLRDSLELLVVDEADLLFSFGFEEELKSLLCHLPRIYQAFLMSATFNEDVQALKELILHNPVTLKLQESQLPGPDQLQQFQVVCETEEDKFLLLYALLKLSLIRGKSLLFVNTLERSYRLRLFLEQFSIPTCVLNGELPLRSRCHIISQFNQGFYDCVIATDAEVLGAPVKGKRRGRGPKGDKASDPEAGVARGIDFHHVSAVLNFDLPPTPEAYIHRAGRTARANNPGIVLTFVLPTEQFHLGKIEELLSGENRGPILLPYQFRMEEIEGFRYRCRDAMRSVTKQAIREARLKEIKEELLHSEKLKTYFEDNPRDLQLLRHDLPLHPAVVKPHLGHVPDYLVPPALRGLVRPHKKRKKLSSSCRKAKRAKSQNPLRSFKHKGKKFRPTAKPS
InterPro domains: - IPR050079: DEAD box RNA helicase (family) [4-531]
- IPR014014: RNA helicase, DEAD-box type, Q motif (domain) [7-35]
- IPR027417: P-loop containing nucleoside triphosphate hydrolase (homologous_superfamily) [2-423]
- IPR014001: Helicase superfamily 1/2, ATP-binding domain (domain) [26-234]
- IPR011545: DEAD/DEAH-box helicase domain (domain) [32-206]
- IPR001650: Helicase, C-terminal domain-like (domain) [230-424]
Interaction partners: - ATP-dependent DNA/RNA helicase DHX36
- ATP-dependent RNA helicase DDX1
- Ribosome production factor 2 homolog
- CCAAT/enhancer-binding protein zeta
- GTP-binding protein 4
- WD repeat-containing protein 74
- Probable rRNA-processing protein EBP2
- Nucleolar complex protein 2 homolog
- Pescadillo homolog
- WD repeat-containing protein 46
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0097159 (organic cyclic compound binding), GO:1901363 (heterocyclic compound binding), GO:0005515 (protein binding), GO:0003676 (nucleic acid binding), GO:0003723 (RNA binding)
Biological Process (BP): GO:0008150 (biological process), GO:0009987 (cellular process), GO:0071840 (cellular component organization or biogenesis), GO:0044085 (cellular component biogenesis), GO:0022613 (ribonucleoprotein complex biogenesis), GO:0042254 (ribosome biogenesis)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0016020 (membrane), GO:0031974 (membrane-enclosed lumen), GO:0043233 (organelle lumen), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0043228 (non-membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle), GO:0070013 (intracellular organelle lumen), GO:0043232 (intracellular non-membrane-bounded organelle), GO:0031981 (nuclear lumen), GO:0005730 (nucleolus), GO:0005694 (chromosome), GO:0005634 (nucleus)