C2orf66
protein-codingchromosome 2 open reading frame 66
Gene summary
Predicted to be located in extracellular region. [provided by Alliance of Genome Resources, Jul 2025]
MANE transcript
Inheritance
ClinVar variants
Top phenotype
gnomAD constraint
Max pathogenic AF
Genomic locus
External References & Databases
Transcript & Mutation Effects
hg38 • Region Span ~4.9 kbGenCC Phenotypes & Disease Associations
Curated gene-disease validity assertions and inheritance patterns
No GenCC data available for this gene.
ClinVar Associated Diseases & Phenotypes
Reported disease conditions connected to C2orf66 variants in ClinVar
No annotated ClinVar phenotypes.
ClinVar Variants & Pathogenicity by Type
Statistics based on transcript NM_213608.3. Only rare variants are included.
We include only reliable ClinVar variants with their consequences to MANE Select, MANE Plus Clinical transcripts, or transcripts with TSL equal to 1. Click a count to filter the variants table below.
Slight differences between displayed counts and ClinVar may occur due to a different transcript/consequence chosen by our variant effect predictor, or because we classify Benign/Likely benign as Likely benign and Pathogenic/Likely pathogenic as Likely pathogenic.
| Effect | PathogenicP | Likely pathogenicLP | VUS | Likely benignLB | BenignB | Sum |
|---|---|---|---|---|---|---|
| synonymous | 0 | |||||
| missense | 0 | |||||
| nonsense | 1 | 1 | ||||
| start loss | 0 | |||||
| frameshift | 0 | |||||
| splice donor/acceptor (+/-2bp) | 0 | |||||
| Total | 0 | 0 | 1 | 0 | 0 | 1 |
Transcript Catalog
Annotated transcript isoforms across RefSeq and Ensembl databases
| Transcript ID | Source | Protein ID | Coding Exons | MANE Status |
|---|---|---|---|---|
| RefSeq | NP_998773.2 | 2 | MANE Select | |
| Ensembl | ENSP00000339384.3 | 2 | MANE Select | |
| RefSeq | XP_047300293.1 | 3 | Standard | |
| RefSeq | XP_047300294.1 | 2 | Standard |
Gene Ontology (GO) Annotations & Pathways
Biological processes, molecular functions, cellular components and pathways
Cellular Component
- extracellular region
gnomAD Constraint
Source:
- Gene type
- protein_coding
- Transcript type
- protein_coding
- Transcript
- ENST00000342506
- Coding exons
- 2
- Length
- 5275
- Individuals with no LoFs
- 125734
- Homozygous LoFs
- 0
- Heterozygous LoFs
- 7
- Defined
- 125741
- p
- 0.0000278
| Z-Score | Observed | Expected | Observed/Expected | Mutation Rate | Total Possible | |
|---|---|---|---|---|---|---|
| Missense | 0.284 | 54 | 60.2 | 0.897 | 0.00000279 | 761 |
| Missense (PolyPhen) | 8 | 15.506 | 0.51593 | 210 | ||
| Synonymous | 0.838 | 18 | 23.1 | 0.778 | 0.00000104 | 242 |
| Loss of Function | 0.106 | 3 | 3.20 | 0.936 | 1.33e-7 | 46 |
Population LoF Frequency
| Population | CAF | p-value | Status |
|---|---|---|---|
| African | 0 | 0.0 | absent |
| Latino/Admixed American | 0.000029 | 0.000029 | rare |
| Ashkenazi Jewish | 0 | 0.0 | absent |
| East Asian | 0.000054 | 0.000054 | rare |
| Finnish | 0 | 0.0 | absent |
| European (Non-Finnish) | 0.000044 | 0.000044 | rare |
| South Asian | 0 | 0.0 | absent |
| Other | 0 | 0.0 | absent |
dbNSFP Gene Annotations
Source:
Intolerance Scores
- LoFtool
- 0.537
- RVIS EVS
- 0.15
- RVIS percentile EVS
- 64.11
Essentials
- Essential (CRISPR)
- N
- Essential (CRISPR2)
- S
- Essential (gene trap)
- N
Gene Damage Prediction
| All | Recessive | Dominant | |
|---|---|---|---|
| Mendelian | Medium | Medium | Medium |
| Primary Immunodeficiency | Medium | Medium | Medium |
| Cancer | Medium | Medium | Medium |