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DDX21
HPA
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  • DDX21
PROTEIN SUMMARY GENE INFORMATION RNA DATA ANTIBODY DATA
GENERAL INFORMATIONi

General description of the gene and the encoded protein(s) using information from HGNC and Ensembl, as well as predictions made by the Human Protein Atlas project.

Gene namei

Official gene symbol, which is typically a short form of the gene name, according to HGNC.

DDX21
Synonyms GURDB, RH-II/GU
Gene descriptioni

Full gene name according to HGNC.

DExD-box helicase 21
Protein classi

Assigned HPA protein class(es) for the encoded protein(s).

Enzymes
Plasma proteins
Predicted locationi

All transcripts of all genes have been analyzed regarding the location(s) of corresponding protein based on prediction methods for signal peptides and transmembrane regions.

  • Genes with at least one transcript predicted to encode a secreted protein, according to prediction methods or to UniProt location data, have been further annotated and classified with the aim to determine if the corresponding protein(s) are secreted or actually retained in intracellular locations or membrane-attached.

  • Remaining genes, with no transcript predicted to encode a secreted protein, will be assigned the prediction-based location(s).

The annotated location overrules the predicted location, so that a gene encoding a predicted secreted protein that has been annotated as intracellular will have intracellular as the final location.

Intracellular
Protein evidence Evidence at protein level (all genes)
GENE INFORMATIONi

Gene information from Ensembl and Entrez, as well as links to available gene identifiers are displayed here. Information was retrieved from Ensembl if not indicated otherwise.

Chromosome 10
Cytoband q22.1
Chromosome location (bp) 68956135 - 68985068
Number of transcriptsi

Number of protein-coding transcripts from the gene as defined by Ensembl.

7
Ensembl ENSG00000165732 (version 109)
Entrez gene 9188
HGNC HGNC:2744
UniProt Q9NR30 (UniProt - Evidence at protein level)
neXtProt NX_Q9NR30
GeneCards DDX21
Antibodypedia DDX21 antibodies


PROTEIN FUNCTION
Protein function (UniProt)i

Useful information about the protein provided by UniProt.

RNA helicase that acts as a sensor of the transcriptional status of both RNA polymerase (Pol) I and II: promotes ribosomal RNA (rRNA) processing and transcription from polymerase II (Pol II) 1, 2. Binds various RNAs, such as rRNAs, snoRNAs, 7SK and, at lower extent, mRNAs 3. In the nucleolus, localizes to rDNA locus, where it directly binds rRNAs and snoRNAs, and promotes rRNA transcription, processing and modification. Required for rRNA 2'-O-methylation, possibly by promoting the recruitment of late-acting snoRNAs SNORD56 and SNORD58 with pre-ribosomal complexes 4, 5. In the nucleoplasm, binds 7SK RNA and is recruited to the promoters of Pol II-transcribed genes: acts by facilitating the release of P-TEFb from inhibitory 7SK snRNP in a manner that is dependent on its helicase activity, thereby promoting transcription of its target genes 6. Functions as a cofactor for JUN-activated transcription: required for phosphorylation of JUN at 'Ser-77' 7, 8. Can unwind double-stranded RNA (helicase) and can fold or introduce a secondary structure to a single-stranded RNA (foldase) 9. Together with SIRT7, required to prevent R-loop-associated DNA damage and transcription-associated genomic instability: deacetylation by SIRT7 activates the helicase activity, thereby overcoming R-loop-mediated stalling of RNA polymerases 10. Involved in rRNA processing 11, 12. May bind to specific miRNA hairpins 13. Component of a multi-helicase-TICAM1 complex that acts as a cytoplasmic sensor of viral double-stranded RNA (dsRNA) and plays a role in the activation of a cascade of antiviral responses including the induction of pro-inflammatory cytokines via the adapter molecule TICAM1 (By similarity).... show less
Molecular function (UniProt)i

Keywords assigned by UniProt to proteins due to their particular molecular function.

Helicase, Hydrolase, RNA-binding
Biological process (UniProt)i

Keywords assigned by UniProt to proteins because they are involved in a particular biological process.

Antiviral defense, Immunity, Innate immunity, rRNA processing, Transcription
Ligand (UniProt)i

Keywords assigned by UniProt to proteins because they bind, are associated with, or whose activity is dependent of some molecule.

ATP-binding, Nucleotide-binding
Gene summary (Entrez)i

Useful information about the gene from Entrez

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 antigen recognized by autoimmune antibodies from a patient with watermelon stomach disease. This protein unwinds double-stranded RNA, folds single-stranded RNA, and may play important roles in ribosomal RNA biogenesis, RNA editing, RNA transport, and general transcription. [provided by RefSeq, Jul 2008]... show less
PROTEIN INFORMATIONi

The protein information section displays alternative protein-coding transcripts (splice variants) encoded by this gene according to the Ensembl database.

The Splice variant identifier links to the Ensembl website protein summary for the selected splice variant. The data in the Swissprot and TrEMBL columns links to corresponding pages in the UniProt database.

The protein classes assigned to this protein are shown if expanding the data in the protein class column. Parent protein classes are in bold font and subclasses are listed under the parent class.

The length of the protein (amino acid residues according to Ensembl), molecular mass (kDalton), predicted signal peptide and number of predicted transmembrane region(s) according to in-house majority decision methods based on sets of predictors are also reported.
Splice variant SwissProt TrEMBL Protein class Gene ontology Length & mass Signal peptide
(predicted)
Transmembrane regions
(predicted)
DDX21-201
ENSP00000346120
ENST00000354185
Q9NR30
[Direct mapping] Nucleolar RNA helicase 2
Show all
Enzymes
   ENZYME proteins
   Hydrolases
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Plasma proteins
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0000166 [nucleotide binding]
GO:0001649 [osteoblast differentiation]
GO:0002376 [immune system process]
GO:0002735 [positive regulation of myeloid dendritic cell cytokine production]
GO:0003676 [nucleic acid binding]
GO:0003723 [RNA binding]
GO:0003724 [RNA helicase activity]
GO:0003725 [double-stranded RNA binding]
GO:0004386 [helicase activity]
GO:0005515 [protein binding]
GO:0005524 [ATP binding]
GO:0005634 [nucleus]
GO:0005654 [nucleoplasm]
GO:0005694 [chromosome]
GO:0005730 [nucleolus]
GO:0005737 [cytoplasm]
GO:0005739 [mitochondrion]
GO:0005829 [cytosol]
GO:0006338 [chromatin remodeling]
GO:0006364 [rRNA processing]
GO:0006366 [transcription by RNA polymerase II]
GO:0009615 [response to virus]
GO:0016020 [membrane]
GO:0016787 [hydrolase activity]
GO:0016887 [ATP hydrolysis activity]
GO:0019843 [rRNA binding]
GO:0030515 [snoRNA binding]
GO:0035066 [positive regulation of histone acetylation]
GO:0035198 [miRNA binding]
GO:0042802 [identical protein binding]
GO:0043123 [positive regulation of I-kappaB kinase/NF-kappaB signaling]
GO:0043330 [response to exogenous dsRNA]
GO:0045087 [innate immune response]
GO:0045943 [positive regulation of transcription by RNA polymerase I]
GO:0045944 [positive regulation of transcription by RNA polymerase II]
GO:0045945 [positive regulation of transcription by RNA polymerase III]
GO:0051607 [defense response to virus]
GO:0062176 [R-loop disassembly]
GO:0097322 [7SK snRNA binding]
GO:0110016 [B-WICH complex]
Show all
783 aa
87.3 kDa
No 0
DDX21-202
ENSP00000480334
ENST00000620315
Q9NR30
[Direct mapping] Nucleolar RNA helicase 2
Show all
Enzymes
   ENZYME proteins
   Hydrolases
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Plasma proteins
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Kim et al 2014)
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0000166 [nucleotide binding]
GO:0001649 [osteoblast differentiation]
GO:0002376 [immune system process]
GO:0003676 [nucleic acid binding]
GO:0003723 [RNA binding]
GO:0003724 [RNA helicase activity]
GO:0004386 [helicase activity]
GO:0005515 [protein binding]
GO:0005524 [ATP binding]
GO:0005634 [nucleus]
GO:0005654 [nucleoplasm]
GO:0005694 [chromosome]
GO:0005730 [nucleolus]
GO:0005737 [cytoplasm]
GO:0005739 [mitochondrion]
GO:0005829 [cytosol]
GO:0006338 [chromatin remodeling]
GO:0006364 [rRNA processing]
GO:0006366 [transcription by RNA polymerase II]
GO:0016020 [membrane]
GO:0016787 [hydrolase activity]
GO:0016887 [ATP hydrolysis activity]
GO:0019843 [rRNA binding]
GO:0030515 [snoRNA binding]
GO:0035066 [positive regulation of histone acetylation]
GO:0035198 [miRNA binding]
GO:0043123 [positive regulation of I-kappaB kinase/NF-kappaB signaling]
GO:0045087 [innate immune response]
GO:0045943 [positive regulation of transcription by RNA polymerase I]
GO:0045944 [positive regulation of transcription by RNA polymerase II]
GO:0045945 [positive regulation of transcription by RNA polymerase III]
GO:0051607 [defense response to virus]
GO:0062176 [R-loop disassembly]
GO:0097322 [7SK snRNA binding]
GO:0110016 [B-WICH complex]
Show all
715 aa
79.7 kDa
No 0
DDX21-203
ENSP00000508611
ENST00000684824
A0A8I5KNN2
[Direct mapping] RNA helicase
Show all
   SCAMPI predicted membrane proteins
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0000166 [nucleotide binding]
GO:0003676 [nucleic acid binding]
GO:0003723 [RNA binding]
GO:0004386 [helicase activity]
GO:0005524 [ATP binding]
GO:0016787 [hydrolase activity]
Show all
808 aa
90 kDa
No 0
DDX21-204
ENSP00000510328
ENST00000685106
A0A8I5KYZ4
[Direct mapping] RNA helicase
Show all
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0000166 [nucleotide binding]
GO:0003676 [nucleic acid binding]
GO:0003723 [RNA binding]
GO:0004386 [helicase activity]
GO:0005524 [ATP binding]
GO:0016787 [hydrolase activity]
Show all
729 aa
81.6 kDa
No 0
DDX21-207
ENSP00000508639
ENST00000686528
A0A8I5KNP3
[Direct mapping] RNA helicase
Show all
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0000166 [nucleotide binding]
GO:0003676 [nucleic acid binding]
GO:0003723 [RNA binding]
GO:0004386 [helicase activity]
GO:0005524 [ATP binding]
GO:0016787 [hydrolase activity]
Show all
768 aa
85.8 kDa
No 0
DDX21-210
ENSP00000510035
ENST00000690316
Q9NR30
[Direct mapping] Nucleolar RNA helicase 2
Show all
Enzymes
   ENZYME proteins
   Hydrolases
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Plasma proteins
Mapped to neXtProt
   neXtProt - Evidence at protein level
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0000166 [nucleotide binding]
GO:0001649 [osteoblast differentiation]
GO:0002376 [immune system process]
GO:0003676 [nucleic acid binding]
GO:0003723 [RNA binding]
GO:0003724 [RNA helicase activity]
GO:0004386 [helicase activity]
GO:0005515 [protein binding]
GO:0005524 [ATP binding]
GO:0005634 [nucleus]
GO:0005654 [nucleoplasm]
GO:0005694 [chromosome]
GO:0005730 [nucleolus]
GO:0005737 [cytoplasm]
GO:0005739 [mitochondrion]
GO:0005829 [cytosol]
GO:0006338 [chromatin remodeling]
GO:0006364 [rRNA processing]
GO:0006366 [transcription by RNA polymerase II]
GO:0016020 [membrane]
GO:0016787 [hydrolase activity]
GO:0016887 [ATP hydrolysis activity]
GO:0019843 [rRNA binding]
GO:0030515 [snoRNA binding]
GO:0035066 [positive regulation of histone acetylation]
GO:0035198 [miRNA binding]
GO:0043123 [positive regulation of I-kappaB kinase/NF-kappaB signaling]
GO:0045087 [innate immune response]
GO:0045943 [positive regulation of transcription by RNA polymerase I]
GO:0045944 [positive regulation of transcription by RNA polymerase II]
GO:0045945 [positive regulation of transcription by RNA polymerase III]
GO:0051607 [defense response to virus]
GO:0062176 [R-loop disassembly]
GO:0097322 [7SK snRNA binding]
GO:0110016 [B-WICH complex]
Show all
715 aa
79.7 kDa
No 0
DDX21-211
ENSP00000508484
ENST00000690650
A0A8I5KND9
[Direct mapping] RNA helicase
Show all
Predicted intracellular proteins
   Intracellular proteins predicted by MDM and MDSEC
Protein evidence (Ezkurdia et al 2014)
Show all
GO:0000166 [nucleotide binding]
GO:0003676 [nucleic acid binding]
GO:0003723 [RNA binding]
GO:0004386 [helicase activity]
GO:0005524 [ATP binding]
GO:0016787 [hydrolase activity]
Show all
661 aa
73.9 kDa
No 0

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