KCTD21
protein-codingpotassium channel tetramerization domain containing 21, the group of KCTD family
Gene summary
Enables cullin family protein binding activity; histone deacetylase binding activity; and identical protein binding activity. Involved in negative regulation of smoothened signaling pathway and ubiquitin-dependent protein catabolic process. [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 ~17.4 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 KCTD21 variants in ClinVar
ClinVar Variants & Pathogenicity by Type
Statistics based on transcript NM_001029859.3. 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 | 1 | 1 | ||||
| missense | 39 | 39 | ||||
| nonsense | 0 | |||||
| start loss | 0 | |||||
| frameshift | 0 | |||||
| splice donor/acceptor (+/-2bp) | 0 | |||||
| Total | 0 | 0 | 39 | 0 | 1 | 40 |
Transcript Catalog
Annotated transcript isoforms across RefSeq and Ensembl databases
| Transcript ID | Source | Protein ID | Coding Exons | MANE Status |
|---|---|---|---|---|
| RefSeq | NP_001025030.1 | 1 | MANE Select | |
| Ensembl | ENSP00000339340.3 | 1 | MANE Select | |
| Ensembl | ENSP00000434174.1 | 1 | Standard | |
| Ensembl | ENSP00000431789.1 | 1 | Standard |
Gene Ontology (GO) Annotations & Pathways
Biological processes, molecular functions, cellular components and pathways
Biological Process
- ubiquitin-dependent protein catabolic process
- protein ubiquitination
- regulation of growth
- negative regulation of smoothened signaling pathway
- protein homooligomerization
Molecular Function
- identical protein binding
- histone deacetylase binding
- cullin family protein binding
gnomAD Constraint
Source:
- Gene type
- protein_coding
- Transcript type
- protein_coding
- Transcript
- ENST00000340067
- Coding exons
- 1
- Length
- 17574
- Individuals with no LoFs
- 125728
- Homozygous LoFs
- 0
- Heterozygous LoFs
- 17
- Defined
- 125745
- p
- 0.0000676
| Z-Score | Observed | Expected | Observed/Expected | Mutation Rate | Total Possible | |
|---|---|---|---|---|---|---|
| Missense | 0.505 | 138 | 156 | 0.886 | 0.00000962 | 1735 |
| Missense (PolyPhen) | 41 | 55.144 | 0.74351 | 532 | ||
| Synonymous | -0.277 | 70 | 67.1 | 1.04 | 0.00000431 | 517 |
| Loss of Function | 0.427 | 4 | 5.03 | 0.794 | 2.18e-7 | 64 |
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 | 0.000047 | 0.000046 | rare |
| European (Non-Finnish) | 0.000053 | 0.000053 | rare |
| South Asian | 0.00026 | 0.00026 | rare |
| Other | 0.00033 | 0.00033 | rare |
dbNSFP Gene Annotations
Source:
- Function
- FUNCTION: Probable substrate-specific adapter of a BCR (BTB-CUL3- RBX1) E3 ubiquitin-protein ligase complex mediating the ubiquitination and subsequent proteasomal degradation of target proteins. Promotes the ubiquitination of HDAC1. Can function as antagonist of the Hedgehog pathway by affecting the nuclear transfer of transcription factor GLI1; the function probably occurs via HDAC1 down-regulation, keeping GLI1 acetylated and inactive. Inhibits cell growth and tumorigenicity of medulloblastoma (MDB) (PubMed:21472142). {ECO:0000269|PubMed:21472142}.;
Recessive Scores
- pRec
- 0.111
Intolerance Scores
- LoFtool
- 0.308
- RVIS EVS
- -0.54
- RVIS percentile EVS
- 20.26
Essentials
- Essential (CRISPR)
- N
- Essential (CRISPR2)
- N
- Essential (gene trap)
- N
- Indispensability pred.
- E
- Indispensability score
- 0.508
Gene Damage Prediction
| All | Recessive | Dominant | |
|---|---|---|---|
| Mendelian | Medium | Medium | Medium |
| Primary Immunodeficiency | Medium | Medium | Medium |
| Cancer | Medium | Medium | Medium |