CASTOR1

Cytosolic arginine sensor for mTORC1 subunit 1 Q8WTX7 CAST1_HUMAN
Protein Coding Chr 22 22q12.2 Swiss-Prot reviewed Entrez 652968
Mutations
286
CL 87 · Tissue 196
Samples
173
CL 65 · Tissue 106
Peptides
107
unique mutant peptides
Transcripts
2
isoforms mutated

Stats by Source

Total, split by cell line (COSMIC CL / DepMap / PubMed) vs tissue (COSMIC primary tissue)

How the counts split by source
Stats by Source

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.

TotalCell lineTissue
Mutations28687196
Samples17365106
Peptides1072878

Function

CASTOR1 · Cytosolic arginine sensor for mTORC1 subunit 1

Enables arginine binding activity and identical protein binding activity. Involved in cellular response to L-arginine and negative regulation of TORC1 signaling. Located in cytosol. Colocalizes with GATOR2 complex. [provided by Alliance of Genome Resources, Apr 2022]

Isoforms & Proteins

2 transcripts · UniProt mapping is sequence-verified (AA-safe)

About the isoform mapping
Isoforms & Proteins

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.

TranscriptUniProtMutationsPeptides
ENST00000407689 Q8WTX7 186 104
ENST00000404953 B7WPJ3* 100 72

Gene Properties

Type
Protein Coding
Chromosome
22
Cytoband
22q12.2
Entrez ID
Aliases
GATSL3

Recurrent Mutations

All 104 amino-acid changes on canonical ENST00000407689 · needle height = samples · drag the mini-map to zoom

What this lollipop shows
Recurrent Mutations

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 CASTOR1 · cell line vs tissue

How this frequency is counted
Cancer-type mutation frequency

For each cancer type, the fraction of samples that carry at least one missense/complex mutation anywhere in CASTOR1 – 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 typeCell linesTissue samples
T-Lymphoblastic Leukemia
5/40 12%
0/0 0%
Chronic Myelogenous Leukemia
2/25 8%
0/0 0%
Oral Cavity Carcinoma
2/54 4%
0/0 0%
Germ Cell Tumour
4/25 16%
0/169 0%
Rhabdomyosarcoma
1/33 3%
2/171 1%
Osteosarcoma
3/45 7%
0/166 0%
Endometrial Carcinoma
0/42 0%
8/612 1%
Chondrosarcoma
1/14 7%
0/75 0%
Acute Myeloid Leukemia
1/90 1%
0/0 0%
Melanoma
6/210 3%
16/1899 1%
Hodgkins Lymphoma
1/16 6%
0/122 0%
Cervical Carcinoma
0/35 0%
3/422 1%
Colorectal Carcinoma
7/143 5%
14/3239 0%
Plasma Cell Myeloma
1/44 2%
1/305 0%
Other Solid Cancers
1/94 1%
8/1515 1%
Thyroid Gland Carcinoma
0/45 0%
9/1592 1%
Non-Small Cell Lung Carcinoma
6/304 2%
2/1390 0%
Gastric Carcinoma
2/74 3%
6/1809 0%
Biliary Tract Carcinoma
1/54 2%
3/950 0%
Esophageal Squamous Cell Carcinoma
0/51 0%
8/2550 0%
Bladder Carcinoma
1/58 2%
2/956 0%
Head and Neck Carcinoma
2/85 2%
3/1574 0%
Neuroendocrine Tumour
2/154 1%
0/577 0%
Ovarian Carcinoma
3/109 3%
0/998 0%
Breast Carcinoma
3/144 2%
5/3264 0%
Squamous Cell Lung Carcinoma
0/57 0%
2/810 0%
B-Cell Non-Hodgkins Lymphoma
6/88 7%
0/2534 0%
Medulloblastoma
0/0 0%
1/450 0%
Kidney Carcinoma
2/85 2%
2/1862 0%
Neuroblastoma
0/87 0%
3/1331 0%

Mutation Distribution

Where CASTOR1 is mutated · all tissues, split by cell line vs tissue

Mutation counts by tissue
Mutation Distribution

How many mutations in CASTOR1 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.

Mutations

All 286 mutations in CASTOR1

About the mutation list
Mutations

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.

IDSampleTranscriptAA Change CDSTypeSourceMutant PeptideWild-type Peptide