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 | 2,738 | 340 | 2,385 |
| Samples | 716 | 135 | 576 |
| Peptides | 595 | 93 | 513 |
Function
ABCB4 · ATP binding cassette subfamily B member 4
The membrane-associated protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the MDR/TAP subfamily. Members of the MDR/TAP subfamily are involved in multidrug resistance as well as antigen presentation. This gene encodes a full transporter and member of the p-glycoprotein family of membrane proteins with phosphatidylcholine as its substrate. The function of this protein has not yet been determined; however, it may involve transport of phospholipids from liver hepatocytes into bile. Alternative splicing of this gene results in several products of undetermined function. [provided by RefSeq, Jul 2008].
Isoforms & Proteins
4 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.
Gene Properties
Recurrent Mutations
All 546 amino-acid changes on canonical ENST00000265723 · 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 ABCB4 · cell line vs tissue
For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in ABCB4 – 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 |
|---|---|---|
| T-Lymphoblastic Leukemia | 6/40 15% | 0/0 0% |
| Chronic Myelogenous Leukemia | 3/25 12% | 0/0 0% |
| Endometrial Carcinoma | 9/42 21% | 39/612 6% |
| Glioblastoma | 6/98 6% | 0/0 0% |
| Melanoma | 7/210 3% | 64/1899 3% |
| Other Solid Cancers | 0/94 0% | 51/1515 3% |
| Gastric Carcinoma | 4/74 5% | 53/1809 3% |
| Squamous Cell Lung Carcinoma | 2/57 4% | 22/810 3% |
| Unknown | 1/10 10% | 0/29 0% |
| Non-Small Cell Lung Carcinoma | 13/304 4% | 30/1390 2% |
| Colorectal Carcinoma | 22/143 15% | 59/3239 2% |
| Acute Myeloid Leukemia | 2/90 2% | 0/0 0% |
| Hodgkins Lymphoma | 1/16 6% | 2/122 2% |
| Germ Cell Tumour | 3/25 12% | 1/169 1% |
| Neuroendocrine Tumour | 12/154 8% | 2/577 0% |
| Bladder Carcinoma | 2/58 3% | 17/956 2% |
| Oral Cavity Carcinoma | 1/54 2% | 0/0 0% |
| Cervical Carcinoma | 1/35 3% | 7/422 2% |
| Ovarian Carcinoma | 3/109 3% | 15/998 2% |
| Hepatocellular Carcinoma | 3/46 7% | 32/2210 1% |
| Other Sarcomas | 3/69 4% | 8/699 1% |
| Glioma | 0/52 0% | 30/2127 1% |
| Small Cell Lung Carcinoma | 0/9 0% | 9/752 1% |
| Esophageal Carcinoma | 0/23 0% | 9/769 1% |
| Esophageal Squamous Cell Carcinoma | 2/51 4% | 26/2550 1% |
| Breast Carcinoma | 7/144 5% | 26/3264 1% |
| Burkitts Lymphoma | 2/32 6% | 0/196 0% |
| Plasma Cell Myeloma | 1/44 2% | 2/305 1% |
| Head and Neck Carcinoma | 1/85 1% | 13/1574 1% |
| Pancreatic Carcinoma | 2/89 2% | 11/1611 1% |
Mutation Distribution
Where ABCB4 is mutated · all tissues, split by cell line vs tissue
How many mutations in ABCB4 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 2,738 mutations in ABCB4
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 |
|---|