KRTAP21-1
protein-codingkeratin associated protein 21-1, the group of Keratin associated proteins
Gene summary
Predicted to be located in cytosol. [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 ~0.4 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 KRTAP21-1 variants in ClinVar
ClinVar Variants & Pathogenicity by Type
Statistics based on transcript NM_181619.2. 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 | 15 | 2 | 17 | |||
| nonsense | 0 | |||||
| start loss | 0 | |||||
| frameshift | 0 | |||||
| splice donor/acceptor (+/-2bp) | 0 | |||||
| Total | 0 | 0 | 15 | 2 | 0 | 17 |
Transcript Catalog
Annotated transcript isoforms across RefSeq and Ensembl databases
| Transcript ID | Source | Protein ID | Coding Exons | MANE Status |
|---|---|---|---|---|
| RefSeq | NP_853650.1 | 1 | MANE Select | |
| Ensembl | ENSP00000335566.3 | 1 | MANE Select |
Gene Ontology (GO) Annotations & Pathways
Biological processes, molecular functions, cellular components and pathways
Biological Process
- keratinization
Cellular Component
- cytosol
- intermediate filament
gnomAD Constraint
Source:
- Gene type
- protein_coding
- Transcript type
- protein_coding
- Transcript
- ENST00000335093
- Coding exons
- 1
- Length
- 308
- Individuals with no LoFs
- 0
- Homozygous LoFs
- 0
- Heterozygous LoFs
- 0
- Defined
- 0
- p
- 0.00
| Z-Score | Observed | Expected | Observed/Expected | Mutation Rate | Total Possible | |
|---|---|---|---|---|---|---|
| Missense | -0.187 | 47 | 43.5 | 1.08 | 0.00000224 | 489 |
| Missense (PolyPhen) | ||||||
| Synonymous | 0.319 | 17 | 18.8 | 0.906 | 0.00000100 | 163 |
| Loss of Function | 0.749 | 0 | 0.654 | 0.00 | 2.72e-8 | 9 |
Population LoF Frequency
| Population | CAF | p-value | Status |
|---|---|---|---|
| African | 0 | 0.0 | absent |
| Latino/Admixed American | 0 | 0.0 | absent |
| Ashkenazi Jewish | 0 | 0.0 | absent |
| East Asian | 0 | 0.0 | absent |
| Finnish | 0 | 0.0 | absent |
| European (Non-Finnish) | 0 | 0.0 | absent |
| South Asian | 0 | 0.0 | absent |
| Other | 0 | 0.0 | absent |
dbNSFP Gene Annotations
Source:
- Function
- FUNCTION: In the hair cortex, hair keratin intermediate filaments are embedded in an interfilamentous matrix, consisting of hair keratin-associated proteins (KRTAP), which are essential for the formation of a rigid and resistant hair shaft through their extensive disulfide bond cross-linking with abundant cysteine residues of hair keratins. The matrix proteins include the high- sulfur and high-glycine-tyrosine keratins.;
Intolerance Scores
- LoFtool
- 0.210
- RVIS EVS
- -0.1
- RVIS percentile EVS
- 46.2
Essentials
- Essential (CRISPR)
- N
- Essential (gene trap)
- N
- Indispensability pred.
- N
- Indispensability score
- 0.0158
Gene Damage Prediction
| All | Recessive | Dominant | |
|---|---|---|---|
| Mendelian | Medium | Medium | Medium |
| Primary Immunodeficiency | Medium | Medium | Medium |
| Cancer | Medium | Medium | Medium |