Q9NR30 (DDX21_HUMAN) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 1, 2013.
Version 141.
History...
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Nucleolar RNA helicase 2 EC=3.6.4.13 Alternative name(s): DEAD box protein 21 Gu-alpha Nucleolar RNA helicase Gu Nucleolar RNA helicase II RH II/Gu | ||
| Gene names |
| ||
| Organism | Homo sapiens (Human) [Reference proteome] | ||
| Taxonomic identifier | 9606 [NCBI] | ||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo![]() |
Protein attributes
| Sequence length | 783 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | Can unwind double-stranded RNA (helicase) and can fold or introduce a secondary structure to a single-stranded RNA (foldase). Functions as cofactor for JUN-activated transcription. Involved in rRNA processing. Ref.9 Ref.10 |
| Catalytic activity | ATP + H2O = ADP + phosphate. |
| Subunit structure | Component of the B-WICH complex, at least composed of SMARCA5/SNF2H, BAZ1B/WSTF, SF3B1, DEK, MYO1C, ERCC6, MYBBP1A and DDX21. Interacts with C1QBP. Ref.12 Ref.20 |
| Subcellular location | |
| Domain | The two enzymatic activities reside in two separate domains, the helicase in the N-terminus and the foldase in the C-terminus. The 3 X 5 AA repeats seem to be critical for the RNA folding activity By similarity. |
| Miscellaneous | Autoantibodies against DDX21 are found in patients with watermelon stomach disease, which is characterized by prominent stripes of ectatic vascular tissue in the stomach similar to stripes on a watermelon. |
| Sequence similarities | Belongs to the DEAD box helicase family. DDX21/DDX50 subfamily. Contains 1 helicase ATP-binding domain. Contains 1 helicase C-terminal domain. |
| Sequence caution | The sequence AAB02546.1 differs from that shown. Reason: Erroneous initiation. |
Ontologies
| Keywords | |
|---|---|
| Cellular component | Nucleus |
| Coding sequence diversity | Alternative splicing Polymorphism |
| Domain | Repeat |
| Ligand | ATP-binding Nucleotide-binding RNA-binding |
| Molecular function | Helicase Hydrolase |
| PTM | Acetylation Phosphoprotein |
| Technical term | 3D-structure Complete proteome Direct protein sequencing Reference proteome |
| Gene Ontology (GO) | |
| Biological_process | response to exogenous dsRNA Inferred from electronic annotation. Source: Compara response to virusInferred from electronic annotation. Source: Compara |
| Cellular_component | nucleolus Inferred from direct assay. Source: HPA |
| Molecular_function | ATP binding Inferred from electronic annotation. Source: UniProtKB-KW ATP-dependent RNA helicase activityTraceable author statement Ref.1. Source: ProtInc double-stranded RNA bindingInferred from electronic annotation. Source: Compara |
| Complete GO annotation... | |
Alternative products
| This entry describes 2 isoforms produced by alternative splicing. [Align] [Select] | ||||||
| Isoform 1 (identifier: Q9NR30-1) This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. | ||||||
| Isoform 2 (identifier: Q9NR30-2) The sequence of this isoform differs from the canonical sequence as follows: 1-68: Missing. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||||||||||||||
Molecule processing | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 783 | 783 | Nucleolar RNA helicase 2 | PRO_0000055027 | |||||||||||||||||
Regions | |||||||||||||||||||||
| Domain | 217 – 396 | 180 | Helicase ATP-binding | ||||||||||||||||||
| Domain | 429 – 573 | 145 | Helicase C-terminal | ||||||||||||||||||
| Repeat | 724 – 728 | 5 | 1 | ||||||||||||||||||
| Repeat | 734 – 738 | 5 | 2 | ||||||||||||||||||
| Repeat | 744 – 748 | 5 | 3 | ||||||||||||||||||
| Nucleotide binding | 230 – 237 | 8 | ATP By similarity | ||||||||||||||||||
| Region | 724 – 748 | 25 | 3 X 5 AA repeats | ||||||||||||||||||
| Motif | 186 – 214 | 29 | Q motif | ||||||||||||||||||
| Motif | 339 – 342 | 4 | DEVD box | ||||||||||||||||||
Amino acid modifications | |||||||||||||||||||||
| Modified residue | 13 | 1 | Phosphoserine Ref.14 Ref.16 Ref.18 Ref.21 | ||||||||||||||||||
| Modified residue | 71 | 1 | Phosphoserine Ref.11 Ref.14 Ref.18 Ref.21 | ||||||||||||||||||
| Modified residue | 89 | 1 | Phosphoserine Ref.11 Ref.13 Ref.14 Ref.18 Ref.21 | ||||||||||||||||||
| Modified residue | 121 | 1 | Phosphoserine Ref.8 Ref.11 Ref.15 Ref.16 Ref.18 Ref.21 | ||||||||||||||||||
| Modified residue | 147 | 1 | Phosphoserine By similarity | ||||||||||||||||||
| Modified residue | 164 | 1 | Phosphoserine By similarity | ||||||||||||||||||
| Modified residue | 173 | 1 | Phosphoserine By similarity | ||||||||||||||||||
| Modified residue | 189 | 1 | Phosphoserine By similarity | ||||||||||||||||||
| Modified residue | 296 | 1 | Phosphothreonine Ref.18 | ||||||||||||||||||
| Modified residue | 567 | 1 | Phosphoserine Ref.18 | ||||||||||||||||||
| Modified residue | 779 | 1 | N6-acetyllysine Ref.17 | ||||||||||||||||||
Natural variations | |||||||||||||||||||||
| Alternative sequence | 1 – 68 | 68 | Missing in isoform 2. | VSP_015716 | |||||||||||||||||
| Natural variant | 27 | 1 | T → I. Ref.1 Ref.2 Corresponds to variant rs17556220 [ dbSNP | Ensembl ]. | VAR_052161 | |||||||||||||||||
Experimental info | |||||||||||||||||||||
| Sequence conflict | 273 | 1 | A → C Ref.2 | ||||||||||||||||||
Secondary structure | |||||||||||||||||||||
Helix Strand Turn | |||||||||||||||||||||
| Beta strand | 631 – 642 | 12 | |||||||||||||||||||
| Helix | 651 – 660 | 10 | |||||||||||||||||||
| Turn | 664 – 667 | 4 | |||||||||||||||||||
| Helix | 676 – 678 | 3 | |||||||||||||||||||
| Beta strand | 679 – 686 | 8 | |||||||||||||||||||
| Helix | 687 – 693 | 7 | |||||||||||||||||||
| Beta strand | 704 – 707 | 4 | |||||||||||||||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "A nucleolar RNA helicase recognized by autoimmune antibodies from a patient with watermelon stomach disease." Valdez B.C., Henning D., Busch R.K., Woods K., Flores-Rozas H., Hurwitz J., Perlaky L., Busch H. Nucleic Acids Res. 24:1220-1224(1996) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1), SUBCELLULAR LOCATION, VARIANT ILE-27. |
| [2] | "Human RNA helicase II/Gu gene: genomic organization and promoter analysis." Zhu K., Henning D., Valdez B.C., Busch H. Biochem. Biophys. Res. Commun. 281:1006-1011(2001) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA], VARIANT ILE-27. Tissue: Cervix adenocarcinoma. |
| [3] | "Complete sequencing and characterization of 21,243 full-length human cDNAs." Ota T., Suzuki Y., Nishikawa T., Otsuki T., Sugiyama T., Irie R., Wakamatsu A., Hayashi K., Sato H., Nagai K., Kimura K., Makita H., Sekine M., Obayashi M., Nishi T., Shibahara T., Tanaka T., Ishii S. Sugano S.Nat. Genet. 36:40-45(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 2). Tissue: Placenta. |
| [4] | "The full-ORF clone resource of the German cDNA consortium." Bechtel S., Rosenfelder H., Duda A., Schmidt C.P., Ernst U., Wellenreuther R., Mehrle A., Schuster C., Bahr A., Bloecker H., Heubner D., Hoerlein A., Michel G., Wedler H., Koehrer K., Ottenwaelder B., Poustka A., Wiemann S., Schupp I. BMC Genomics 8:399-399(2007) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 2). Tissue: Uterine endothelium. |
| [5] | "The DNA sequence and comparative analysis of human chromosome 10." Deloukas P., Earthrowl M.E., Grafham D.V., Rubenfield M., French L., Steward C.A., Sims S.K., Jones M.C., Searle S., Scott C., Howe K., Hunt S.E., Andrews T.D., Gilbert J.G.R., Swarbreck D., Ashurst J.L., Taylor A., Battles J. Rogers J.Nature 429:375-381(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [6] | Mural R.J., Istrail S., Sutton G.G., Florea L., Halpern A.L., Mobarry C.M., Lippert R., Walenz B., Shatkay H., Dew I., Miller J.R., Flanigan M.J., Edwards N.J., Bolanos R., Fasulo D., Halldorsson B.V., Hannenhalli S., Turner R. Venter J.C.Submitted (JUL-2005) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [7] | "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 1). Tissue: Colon and Muscle. |
| [8] | Bienvenut W.V., Waridel P., Quadroni M. Submitted (MAR-2009) to UniProtKB Cited for: PROTEIN SEQUENCE OF 7-18; 117-131; 185-199; 205-215; 237-247; 258-270; 287-304; 307-318; 364-387; 392-402; 407-417; 424-432; 450-474; 485-499; 545-555; 606-627; 659-668; 679-696 AND 703-718, PHOSPHORYLATION AT SER-121, MASS SPECTROMETRY. Tissue: Cervix carcinoma. |
| [9] | "The DEXD/H-box RNA helicase RHII/Gu is a co-factor for c-Jun-activated transcription." Westermarck J., Weiss C., Saffrich R., Kast J., Musti A.M., Wessely M., Ansorge W., Seraphin B., Wilm M., Valdez B.C., Bohmann D. EMBO J. 21:451-460(2002) [PubMed] [Europe PMC] [Abstract] Cited for: PROTEIN SEQUENCE OF 185-199; 260-270 AND 563-573, FUNCTION. |
| [10] | "Silencing of RNA helicase II/Gualpha inhibits mammalian ribosomal RNA production." Henning D., So R.B., Jin R., Lau L.F., Valdez B.C. J. Biol. Chem. 278:52307-52314(2003) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION. |
| [11] | "Global, in vivo, and site-specific phosphorylation dynamics in signaling networks." Olsen J.V., Blagoev B., Gnad F., Macek B., Kumar C., Mortensen P., Mann M. Cell 127:635-648(2006) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-71; SER-89 AND SER-121, MASS SPECTROMETRY. Tissue: Cervix carcinoma. |
| [12] | "The WSTF-SNF2h chromatin remodeling complex interacts with several nuclear proteins in transcription." Cavellan E., Asp P., Percipalle P., Oestlund Farrants A.-K. J. Biol. Chem. 281:16264-16271(2006) [PubMed] [Europe PMC] [Abstract] Cited for: IDENTIFICATION IN THE B-WICH COMPLEX. |
| [13] | "Improved titanium dioxide enrichment of phosphopeptides from HeLa cells and high confident phosphopeptide identification by cross-validation of MS/MS and MS/MS/MS spectra." Yu L.-R., Zhu Z., Chan K.C., Issaq H.J., Dimitrov D.S., Veenstra T.D. J. Proteome Res. 6:4150-4162(2007) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-89, MASS SPECTROMETRY. Tissue: Cervix carcinoma. |
| [14] | "A quantitative atlas of mitotic phosphorylation." Dephoure N., Zhou C., Villen J., Beausoleil S.A., Bakalarski C.E., Elledge S.J., Gygi S.P. Proc. Natl. Acad. Sci. U.S.A. 105:10762-10767(2008) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-13; SER-71 AND SER-89, MASS SPECTROMETRY. Tissue: Cervix carcinoma. |
| [15] | "Large-scale proteomics analysis of the human kinome." Oppermann F.S., Gnad F., Olsen J.V., Hornberger R., Greff Z., Keri G., Mann M., Daub H. Mol. Cell. Proteomics 8:1751-1764(2009) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-121, MASS SPECTROMETRY. |
| [16] | "Quantitative phosphoproteomic analysis of T cell receptor signaling reveals system-wide modulation of protein-protein interactions." Mayya V., Lundgren D.H., Hwang S.-I., Rezaul K., Wu L., Eng J.K., Rodionov V., Han D.K. Sci. Signal. 2:RA46-RA46(2009) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-13 AND SER-121, MASS SPECTROMETRY. Tissue: Leukemic T-cell. |
| [17] | "Lysine acetylation targets protein complexes and co-regulates major cellular functions." Choudhary C., Kumar C., Gnad F., Nielsen M.L., Rehman M., Walther T.C., Olsen J.V., Mann M. Science 325:834-840(2009) [PubMed] [Europe PMC] [Abstract] Cited for: ACETYLATION [LARGE SCALE ANALYSIS] AT LYS-779, MASS SPECTROMETRY. |
| [18] | "Quantitative phosphoproteomics reveals widespread full phosphorylation site occupancy during mitosis." Olsen J.V., Vermeulen M., Santamaria A., Kumar C., Miller M.L., Jensen L.J., Gnad F., Cox J., Jensen T.S., Nigg E.A., Brunak S., Mann M. Sci. Signal. 3:RA3-RA3(2010) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-13; SER-71; SER-89; SER-121; THR-296 AND SER-567, MASS SPECTROMETRY. Tissue: Cervix carcinoma. |
| [19] | "Initial characterization of the human central proteome." Burkard T.R., Planyavsky M., Kaupe I., Breitwieser F.P., Buerckstuemmer T., Bennett K.L., Superti-Furga G., Colinge J. BMC Syst. Biol. 5:17-17(2011) [PubMed] [Europe PMC] [Abstract] Cited for: IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS]. |
| [20] | "Splicing factor 2-associated protein p32 participates in ribosome biogenesis by regulating the binding of Nop52 and fibrillarin to preribosome particles." Yoshikawa H., Komatsu W., Hayano T., Miura Y., Homma K., Izumikawa K., Ishikawa H., Miyazawa N., Tachikawa H., Yamauchi Y., Isobe T., Takahashi N. Mol. Cell. Proteomics 10:0-0(2011) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH C1QBP. |
| [21] | "System-wide temporal characterization of the proteome and phosphoproteome of human embryonic stem cell differentiation." Rigbolt K.T., Prokhorova T.A., Akimov V., Henningsen J., Johansen P.T., Kratchmarova I., Kassem M., Mann M., Olsen J.V., Blagoev B. Sci. Signal. 4:RS3-RS3(2011) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-13; SER-71; SER-89 AND SER-121, MASS SPECTROMETRY. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| EMBL GenBank DDBJ | U41387 mRNA. Translation: AAB02546.1. Different initiation. AF261903 Genomic DNA. No translation available. AF261917 AF261916 Genomic DNA. Translation: AAF78930.2.AK315585 mRNA. Translation: BAG37957.1. CR749598 mRNA. Translation: CAH18395.1. AL359844 Genomic DNA. Translation: CAH72377.1. CH471083 Genomic DNA. Translation: EAW54307.1. BC008071 mRNA. Translation: AAH08071.2. | ||||||||||||
| IPI | IPI00015953. IPI00477179. | ||||||||||||
| PIR | PC6010. | ||||||||||||
| RefSeq | NP_001243839.1. NM_001256910.1. NP_004719.2. NM_004728.3. | ||||||||||||
| UniGene | Hs.223141. | ||||||||||||
3D structure databases | |||||||||||||
| PDBe RCSB PDB PDBj |
| ||||||||||||
| ProteinModelPortal | Q9NR30. | ||||||||||||
| ModBase | Search... | ||||||||||||
Protein-protein interaction databases | |||||||||||||
| IntAct | Q9NR30. 23 interactions. | ||||||||||||
| MINT | MINT-231639. | ||||||||||||
| STRING | 9606.ENSP00000346120. | ||||||||||||
PTM databases | |||||||||||||
| PhosphoSite | Q9NR30. | ||||||||||||
Polymorphism databases | |||||||||||||
| DMDM | 76803555. | ||||||||||||
2D gel databases | |||||||||||||
| SWISS-2DPAGE | Q9NR30. | ||||||||||||
Proteomic databases | |||||||||||||
| PaxDb | Q9NR30. | ||||||||||||
| PeptideAtlas | Q9NR30. | ||||||||||||
| PRIDE | Q9NR30. | ||||||||||||
Protocols and materials databases | |||||||||||||
| DNASU | 9188. | ||||||||||||
| StructuralBiologyKnowledgebase | Search... | ||||||||||||
Genome annotation databases | |||||||||||||
| Ensembl | ENST00000354185; ENSP00000346120; ENSG00000165732. | ||||||||||||
| GeneID | 9188. | ||||||||||||
| KEGG | hsa:9188. | ||||||||||||
| UCSC | uc001jov.1. human. | ||||||||||||
Organism-specific databases | |||||||||||||
| CTD | 9188. | ||||||||||||
| GeneCards | GC10P070715. | ||||||||||||
| H-InvDB | HIX0008880. | ||||||||||||
| HGNC | HGNC:2744. DDX21. | ||||||||||||
| HPA | HPA036592. | ||||||||||||
| MIM | 606357. gene. | ||||||||||||
| neXtProt | NX_Q9NR30. | ||||||||||||
| PharmGKB | PA27210. | ||||||||||||
| GenAtlas | Search... | ||||||||||||
Phylogenomic databases | |||||||||||||
| eggNOG | COG0513. | ||||||||||||
| HOGENOM | HOG000268805. | ||||||||||||
| HOVERGEN | HBG051331. | ||||||||||||
| InParanoid | Q9NR30. | ||||||||||||
| OMA | EILCVAY. | ||||||||||||
| OrthoDB | EOG46143T. | ||||||||||||
| PhylomeDB | Q9NR30. | ||||||||||||
Gene expression databases | |||||||||||||
| ArrayExpress | Q9NR30. | ||||||||||||
| Bgee | Q9NR30. | ||||||||||||
| CleanEx | HS_DDX21. | ||||||||||||
| Genevestigator | Q9NR30. | ||||||||||||
| GermOnline | ENSG00000165732. Homo sapiens. | ||||||||||||
Family and domain databases | |||||||||||||
| InterPro | IPR011545. DNA/RNA_helicase_DEAD/DEAH_N. IPR012562. GUCT. IPR014001. Helicase_ATP-bd. IPR001650. Helicase_C. IPR014014. RNA_helicase_DEAD_Q_motif. [Graphical view] | ||||||||||||
| Pfam | PF00270. DEAD. 1 hit. PF08152. GUCT. 1 hit. PF00271. Helicase_C. 1 hit. [Graphical view] | ||||||||||||
| SMART | SM00487. DEXDc. 1 hit. SM00490. HELICc. 1 hit. [Graphical view] | ||||||||||||
| PROSITE | PS00039. DEAD_ATP_HELICASE. False negative. PS51192. HELICASE_ATP_BIND_1. 1 hit. PS51194. HELICASE_CTER. 1 hit. PS51195. Q_MOTIF. 1 hit. [Graphical view] | ||||||||||||
| ProtoNet | Search... | ||||||||||||
Other | |||||||||||||
| ChiTaRS | DDX21. human. | ||||||||||||
| GenomeRNAi | 9188. | ||||||||||||
| NextBio | 34453. | ||||||||||||
| SOURCE | Search... | ||||||||||||
Entry information
| Entry name | DDX21_HUMAN | ||||||||
| Accession | Primary (citable) accession number: Q9NR30 Secondary accession number(s): B2RDL0 Q68D35 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
| Disclaimer | Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. | ||||||||
Relevant documents
| Human chromosome 10 Human chromosome 10: entries, gene names and cross-references to MIM |
| Human entries with polymorphisms or disease mutations List of human entries with polymorphisms or disease mutations |
| Human polymorphisms and disease mutations Index of human polymorphisms and disease mutations |
| MIM cross-references Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot |
| PDB cross-references Index of Protein Data Bank (PDB) cross-references |
| SIMILARITY comments Index of protein domains and families |

Clusters with
