Stats by Source
Total, split by cell line (COSMIC CL / DepMap / PubMed) vs tissue (COSMIC primary tissue)
Total = all mutations for this gene across every source.
Cell line = COSMIC Cell Lines Project + DepMap + PubMed.
Tissue = COSMIC primary-tissue (patient tumour) samples.
Total can exceed cell line + tissue: COSMIC tissue-derived models sit only in global, and a peptide can be shared across both.
| Total | Cell line | Tissue | |
|---|---|---|---|
| Mutations | 465 | 79 | 377 |
| Samples | 242 | 52 | 185 |
| Peptides | 201 | 35 | 165 |
Function
DDX21 · DExD-box helicase 21
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].
Isoforms & Proteins
3 transcripts · UniProt mapping is sequence-verified (AA-safe)
Each Ensembl transcript (ENST) this gene is mutated on, with its matched UniProt accession.
The mapping is sequence-verified: the UniProt sequence is identical to the transcript translation, so amino-acid positions line up exactly. A * marks an unreviewed (TrEMBL) entry.
Counts are mutations and unique mutant peptides on each transcript.
| Transcript | UniProt | Mutations | Peptides |
|---|---|---|---|
| ENST00000354185 | Q9NR30 | 255 | 196 |
| ENST00000620315 | Q9NR30-2 | 208 | 170 |
| ENST00000685106 | A0A8I5KYZ4* | 2 | 2 |
Gene Properties
Recurrent Mutations
All 196 amino-acid changes on canonical ENST00000354185 · needle height = samples · drag the mini-map to zoom
A lollipop / needle plot – the standard way to show recurrent mutations along a protein (as used by cBioPortal and MutationMapper).
X-axis = amino-acid position in the protein.
Needle height & head size = how often that exact amino-acid change was observed (its recurrence). Tall/large heads are mutational hotspots.
The most recurrent changes are labelled; hover any needle for the change, position and counts.
Mutation frequency across cancer types
% of samples with a missense/complex mutation in DDX21 · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in DDX21 – counted as distinct samples (a sample counts once no matter how many mutations it has).
Split into cell line and tissue; each cell shows mutated / total and the percentage. Cohorts with <20 samples are omitted. Ordered by combined frequency.
| Cancer type | Cell lines | Tissue samples |
|---|---|---|
| Endometrial Carcinoma | 8/42 19% | 15/612 2% |
| Bladder Carcinoma | 2/58 3% | 12/956 1% |
| Burkitts Lymphoma | 0/32 0% | 3/196 2% |
| Cervical Carcinoma | 2/35 6% | 4/422 1% |
| Melanoma | 2/210 1% | 25/1899 1% |
| Colorectal Carcinoma | 5/143 4% | 29/3239 1% |
| Gastric Carcinoma | 4/74 5% | 13/1809 1% |
| Non-Small Cell Lung Carcinoma | 3/304 1% | 10/1390 1% |
| Head and Neck Carcinoma | 4/85 5% | 7/1574 0% |
| Other Sarcomas | 0/69 0% | 5/699 1% |
| Breast Carcinoma | 8/144 6% | 12/3264 0% |
| B-Cell Non-Hodgkins Lymphoma | 4/88 5% | 10/2534 0% |
| Biliary Tract Carcinoma | 1/54 2% | 3/950 0% |
| Ovarian Carcinoma | 1/109 1% | 3/998 0% |
| Pancreatic Carcinoma | 0/89 0% | 6/1611 0% |
| Other Solid Cancers | 0/94 0% | 5/1515 0% |
| Thyroid Gland Carcinoma | 1/45 2% | 4/1592 0% |
| Plasma Cell Myeloma | 1/44 2% | 0/305 0% |
| Glioma | 2/52 4% | 4/2127 0% |
| Esophageal Squamous Cell Carcinoma | 1/51 2% | 6/2550 0% |
| Small Cell Lung Carcinoma | 0/9 0% | 2/752 0% |
| Esophageal Carcinoma | 0/23 0% | 2/769 0% |
| Squamous Cell Lung Carcinoma | 1/57 2% | 1/810 0% |
| Kidney Carcinoma | 0/85 0% | 3/1862 0% |
| Hepatocellular Carcinoma | 0/46 0% | 3/2210 0% |
| Non-Cancerous | 0/104 0% | 1/830 0% |
| B-Lymphoblastic Leukemia | 2/55 4% | 0/2640 0% |
| Prostate Carcinoma | 0/13 0% | 1/2105 0% |
| Other Blood Cancers | 0/61 0% | 1/2725 0% |
Mutation Distribution
Where DDX21 is mutated · all tissues, split by cell line vs tissue
How many mutations in DDX21 were found in each tissue, across the whole database.
Each bar is a tissue (cell-line and tissue names are merged to the standard tissue), split into cell line and tissue (patient tumour) contributions.
This shows the cancer-context where this gene is recurrently altered.
GTEx Expression
Median TPM across 54 healthy tissues
Median gene expression (TPM) in normal, non-cancer human tissues from the GTEx project.
Useful for judging tumour specificity – a strong neoantigen target ideally comes from a gene with low expression in healthy tissues.
Scroll or drag the mini-axis below the chart to browse all tissues.
Mutations
All 465 mutations in DDX21
Every mutation record for this gene, across all samples and sources.
The Sample column links to the cell line (cell-line samples) or the tissue type (tissue samples).
Use the Type / Source filters, the search box, and column sorting to explore; each CAN-IMMUNE ID opens the full mutation & peptide view.
| ID | Sample | Transcript | AA Change | CDS | Type | Source | Mutant Peptide | Wild-type Peptide |
|---|