SKP2
protein-codingS-phase kinase associated protein 2, the group of F-box and leucine rich repeat proteins
Gene summary
This gene encodes a member of the F-box protein family which is characterized by an approximately 40 amino acid motif, the F-box. The F-box proteins constitute one of the four subunits of ubiquitin protein ligase complex called SCFs (SKP1-cullin-F-box), which function in phosphorylation-dependent ubiquitination. The F-box proteins are divided into 3 classes: Fbws containing WD-40 domains, Fbls containing leucine-rich repeats, and Fbxs containing either different protein-protein interaction modules or no recognizable motifs. The protein encoded by this gene belongs to the Fbls class; in addition to an F-box, this protein contains 10 tandem leucine-rich repeats. This protein is an essential element of the cyclin A-CDK2 S-phase kinase. It specifically recognizes phosphorylated cyclin-dependent kinase inhibitor 1B (CDKN1B, also referred to as p27 or KIP1) predominantly in S phase and interacts with S-phase kinase-associated protein 1 (SKP1 or p19). In addition, this gene is established as a protooncogene causally involved in the pathogenesis of lymphomas. Alternative splicing of this gene generates three transcript variants encoding different isoforms. [provided by RefSeq, Jul 2011]
MANE transcript
Inheritance
ClinVar variants
Top phenotype
gnomAD constraint
Max pathogenic AF
Genomic locus
External References & Databases
Transcript & Mutation Effects
hg38 • Region Span ~44.9 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 SKP2 variants in ClinVar
ClinVar Variants & Pathogenicity by Type
Statistics based on transcript NM_005983.4. 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 | ||||
| missense | 30 | 30 | ||||
| nonsense | 1 | 1 | ||||
| start loss | 0 | |||||
| frameshift | 0 | |||||
| splice donor/acceptor (+/-2bp) | 1 | 1 | ||||
| Total | 0 | 0 | 33 | 0 | 0 | 33 |
Transcript Catalog
Annotated transcript isoforms across RefSeq and Ensembl databases
| Transcript ID | Source | Protein ID | Coding Exons | MANE Status |
|---|---|---|---|---|
| RefSeq | NP_005974.2 | 10 | MANE Select | |
| Ensembl | ENSP00000274255.6 | 10 | MANE Select | |
| RefSeq | NP_001230049.1 | 6 | Standard | |
| RefSeq | NP_116026.1 | 10 | Standard |
Gene Ontology (GO) Annotations & Pathways
Biological processes, molecular functions, cellular components and pathways
Pathways ConsensusPathDB
- mTOR signaling pathway - Homo sapiens (human)
- Cell cycle - Homo sapiens (human)
- Small cell lung cancer - Homo sapiens (human)
- Ubiquitin mediated proteolysis - Homo sapiens (human)
- FoxO signaling pathway - Homo sapiens (human)
Biological Process
- G1/S transition of mitotic cell cycle
- G2/M transition of mitotic cell cycle
- protein polyubiquitination
- cell population proliferation
- viral process
Molecular Function
- ubiquitin-protein transferase activity
- protein binding
- identical protein binding
- ubiquitin protein ligase activity
Cellular Component
- nucleus
- nucleoplasm
- nucleolus
- cytosol
- SCF ubiquitin ligase complex
gnomAD Constraint
Source:
- Gene type
- protein_coding
- Transcript type
- protein_coding
- Transcript
- ENST00000274255
- Coding exons
- 10
- Length
- 32331
- Individuals with no LoFs
- 125742
- Homozygous LoFs
- 0
- Heterozygous LoFs
- 6
- Defined
- 125748
- p
- 0.0000239
| Z-Score | Observed | Expected | Observed/Expected | Mutation Rate | Total Possible | |
|---|---|---|---|---|---|---|
| Missense | 1.95 | 148 | 232 | 0.639 | 0.0000120 | 2753 |
| Missense (PolyPhen) | 21 | 54.299 | 0.38675 | 732 | ||
| Synonymous | 0.578 | 87 | 94.1 | 0.924 | 0.00000482 | 854 |
| Loss of Function | 3.90 | 3 | 23.3 | 0.129 | 0.00000127 | 250 |
Population LoF Frequency
| Population | CAF | p-value | Status |
|---|---|---|---|
| African | 0.000062 | 0.000062 | rare |
| Latino/Admixed American | 0.000058 | 0.000058 | rare |
| Ashkenazi Jewish | 0 | 0.0 | absent |
| East Asian | 0 | 0.0 | absent |
| Finnish | 0.000046 | 0.000046 | rare |
| European (Non-Finnish) | 0.000018 | 0.000018 | rare |
| South Asian | 0 | 0.0 | absent |
| Other | 0 | 0.0 | absent |
dbNSFP Gene Annotations
Source:
- Function
- FUNCTION: Substrate recognition component of a SCF (SKP1-CUL1-F- box protein) E3 ubiquitin-protein ligase complex which mediates the ubiquitination and subsequent proteasomal degradation of target proteins involved in cell cycle progression, signal transduction and transcription. Specifically recognizes phosphorylated CDKN1B/p27kip and is involved in regulation of G1/S transition. Degradation of CDKN1B/p27kip also requires CKS1. Recognizes target proteins ORC1, CDT1, RBL2, KMT2A/MLL1, CDK9, RAG2, FOXO1, UBP43, and probably MYC, TOB1 and TAL1. Degradation of TAL1 also requires STUB1. Recognizes CDKN1A in association with CCNE1 or CCNE2 and CDK2. Promotes ubiquitination and destruction of CDH1 in a CK1-Dependent Manner, thereby regulating cell migration. {ECO:0000269|PubMed:11931757, ECO:0000269|PubMed:12435635, ECO:0000269|PubMed:12769844, ECO:0000269|PubMed:12840033, ECO:0000269|PubMed:15342634, ECO:0000269|PubMed:15668399, ECO:0000269|PubMed:15949444, ECO:0000269|PubMed:16103164, ECO:0000269|PubMed:16262255, ECO:0000269|PubMed:16581786, ECO:0000269|PubMed:16951159, ECO:0000269|PubMed:17908926, ECO:0000269|PubMed:17962192, ECO:0000269|PubMed:22770219}.;
Recessive Scores
- pRec
- 0.228
Intolerance Scores
- LoFtool
- 0.474
- RVIS EVS
- -0.69
- RVIS percentile EVS
- 14.97
Essentials
- Essential (CRISPR)
- N
- Essential (CRISPR2)
- E
- Essential (gene trap)
- H
- Indispensability pred.
- E
- Indispensability score
- 0.818
Gene Damage Prediction
| All | Recessive | Dominant | |
|---|---|---|---|
| Mendelian | Medium | Medium | Medium |
| Primary Immunodeficiency | Medium | Medium | Medium |
| Cancer | Medium | Medium | Medium |