KPNA1
protein-codingkaryopherin subunit alpha 1, the group of Armadillo repeat containing|Importins
Gene summary
The transport of molecules between the nucleus and the cytoplasm in eukaryotic cells is mediated by the nuclear pore complex (NPC), which consists of 60-100 proteins. Small molecules (up to 70 kD) can pass through the nuclear pore by nonselective diffusion while larger molecules are transported by an active process. The protein encoded by this gene belongs to the importin alpha family, and is involved in nuclear protein import. This protein interacts with the recombination activating gene 1 (RAG1) protein and is a putative substrate of the RAG1 ubiquitin ligase. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2012]
MANE transcript
Inheritance
ClinVar variants
Top phenotype
gnomAD constraint
Max pathogenic AF
Genomic locus
External References & Databases
Transcript & Mutation Effects
hg38 • Region Span ~93.0 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 KPNA1 variants in ClinVar
ClinVar Variants & Pathogenicity by Type
Statistics based on transcript NM_002264.4. 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 | 2 | |||
| missense | 32 | 32 | ||||
| nonsense | 1 | 1 | ||||
| start loss | 0 | |||||
| frameshift | 1 | 1 | ||||
| splice donor/acceptor (+/-2bp) | 4 | 4 | ||||
| Total | 0 | 0 | 38 | 1 | 1 | 40 |
Transcript Catalog
Annotated transcript isoforms across RefSeq and Ensembl databases
| Transcript ID | Source | Protein ID | Coding Exons | MANE Status |
|---|---|---|---|---|
| RefSeq | NP_002255.3 | 13 | MANE Select | |
| Ensembl | ENSP00000343701.6 | 13 | MANE Select | |
| Ensembl | ENSP00000419890.1 | 9 | Standard | |
| Ensembl | ENSP00000417319.1 | 5 | Standard |
Gene Ontology (GO) Annotations & Pathways
Biological processes, molecular functions, cellular components and pathways
Pathways ConsensusPathDB
- Influenza A - Homo sapiens (human)
- Ebola Virus Pathway on Host
- Ebola Virus Pathway on Host
- Disease
- HIV Life Cycle
Biological Process
- regulation of DNA recombination
- apoptotic DNA fragmentation
- NLS-bearing protein import into nucleus
- modulation by virus of host process
- intracellular transport of virus
Molecular Function
- protein binding
- nuclear localization sequence binding
- protein transporter activity
- nuclear import signal receptor activity
Cellular Component
- nucleus
- nuclear pore
- nucleoplasm
- cytoplasm
- cytosol
gnomAD Constraint
Source:
- Gene type
- protein_coding
- Transcript type
- protein_coding
- Transcript
- ENST00000344337
- Coding exons
- 13
- Length
- 92997
- Individuals with no LoFs
- 125738
- Homozygous LoFs
- 0
- Heterozygous LoFs
- 7
- Defined
- 125745
- p
- 0.0000278
| Z-Score | Observed | Expected | Observed/Expected | Mutation Rate | Total Possible | |
|---|---|---|---|---|---|---|
| Missense | 3.20 | 131 | 282 | 0.464 | 0.0000139 | 3537 |
| Missense (PolyPhen) | 34 | 114.32 | 0.29741 | 1427 | ||
| Synonymous | 1.13 | 87 | 101 | 0.857 | 0.00000509 | 1017 |
| Loss of Function | 4.72 | 3 | 31.6 | 0.0948 | 0.00000171 | 362 |
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 | 0.0 | absent |
| Finnish | 0.000093 | 0.000092 | rare |
| European (Non-Finnish) | 0.000018 | 0.000018 | rare |
| South Asian | 0.000035 | 0.000033 | rare |
| Other | 0.00016 | 0.00016 | rare |
dbNSFP Gene Annotations
Source:
- Function
- FUNCTION: Functions in nuclear protein import as an adapter protein for nuclear receptor KPNB1. Binds specifically and directly to substrates containing either a simple or bipartite NLS motif. Docking of the importin/substrate complex to the nuclear pore complex (NPC) is mediated by KPNB1 through binding to nucleoporin FxFG repeats and the complex is subsequently translocated through the pore by an energy requiring, Ran- dependent mechanism. At the nucleoplasmic side of the NPC, Ran binds to importin-beta and the three components separate and importin-alpha and -beta are re-exported from the nucleus to the cytoplasm where GTP hydrolysis releases Ran from importin. The directionality of nuclear import is thought to be conferred by an asymmetric distribution of the GTP- and GDP-bound forms of Ran between the cytoplasm and nucleus. In vitro, mediates the nuclear import of human cytomegalovirus UL84 by recognizing a non- classical NLS.;
Recessive Scores
- pRec
- 0.256
Intolerance Scores
- LoFtool
- 0.260
- RVIS EVS
- -0.23
- RVIS percentile EVS
- 37.11
Essentials
- Essential (CRISPR)
- N
- Essential (CRISPR2)
- S
- Essential (gene trap)
- N
- Indispensability pred.
- E
- Indispensability score
- 0.846
Gene Damage Prediction
| All | Recessive | Dominant | |
|---|---|---|---|
| Mendelian | Medium | Medium | Medium |
| Primary Immunodeficiency | Medium | Medium | Medium |
| Cancer | Medium | Medium | Medium |