SPN
protein-codingsialophorin, the group of CD molecules
Gene summary
This gene encodes a highly sialylated glycoprotein that functions in antigen-specific activation of T cells, and is found on the surface of thymocytes, T lymphocytes, monocytes, granulocytes, and some B lymphocytes. It contains a mucin-like extracellular domain, a transmembrane region and a carboxy-terminal intracellular region. The extracellular domain has a high proportion of serine and threonine residues, allowing extensive O-glycosylation, and has one potential N-glycosylation site, while the carboxy-terminal region has potential phosphorylation sites that may mediate transduction of activation signals. Different glycoforms of this protein have been described. In stimulated immune cells, proteolytic cleavage of the extracellular domain occurs in some cell types, releasing a soluble extracellular fragment. Defects in expression of this gene are associated with Wiskott-Aldrich syndrome. [provided by RefSeq, Sep 2017]
MANE transcript
Inheritance
ClinVar variants
Top phenotype
gnomAD constraint
Max pathogenic AF
Genomic locus
External References & Databases
Transcript & Mutation Effects
hg38 • Region Span ~7.9 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 SPN variants in ClinVar
ClinVar Variants & Pathogenicity by Type
Statistics based on transcript NM_003123.6. 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 | 4 | 3 | 7 | |||
| missense | 67 | 10 | 3 | 80 | ||
| nonsense | 0 | |||||
| start loss | 0 | |||||
| frameshift | 0 | |||||
| splice donor/acceptor (+/-2bp) | 0 | |||||
| Total | 0 | 0 | 67 | 14 | 6 | 87 |
Transcript Catalog
Annotated transcript isoforms across RefSeq and Ensembl databases
| Transcript ID | Source | Protein ID | Coding Exons | MANE Status |
|---|---|---|---|---|
| RefSeq | NP_003114.1 | 1 | MANE Select | |
| Ensembl | ENSP00000498852.1 | 1 | MANE Select | |
| RefSeq | NP_001025459.1 | 1 | Standard | |
| Ensembl | ENSP00000353238.3 | 1 | Standard |
Gene Ontology (GO) Annotations & Pathways
Biological processes, molecular functions, cellular components and pathways
Pathways ConsensusPathDB
- Cell adhesion molecules (CAMs) - Homo sapiens (human)
- Epstein-Barr virus infection - Homo sapiens (human)
- Cell surface interactions at the vascular wall
- Hemostasis
- Basigin interactions
Biological Process
- T-helper 1 cell lineage commitment
- chemotaxis
- immune response
- cellular defense response
- negative regulation of cell adhesion
Molecular Function
- transmembrane signaling receptor activity
- Hsp70 protein binding
- heat shock protein binding
Cellular Component
- uropod
- extracellular space
- plasma membrane
- integral component of plasma membrane
- microvillus
gnomAD Constraint
Source:
- Gene type
- protein_coding
- Transcript type
- protein_coding
- Transcript
- ENST00000360121
- Coding exons
- 1
- Length
- 7888
- Individuals with no LoFs
- 125665
- Homozygous LoFs
- 0
- Heterozygous LoFs
- 4
- Defined
- 125669
- p
- 0.0000159
| Z-Score | Observed | Expected | Observed/Expected | Mutation Rate | Total Possible | |
|---|---|---|---|---|---|---|
| Missense | -0.0855 | 228 | 224 | 1.02 | 0.0000133 | 2471 |
| Missense (PolyPhen) | 75 | 59.09 | 1.2692 | 600 | ||
| Synonymous | -0.402 | 99 | 94.0 | 1.05 | 0.00000577 | 978 |
| Loss of Function | -0.796 | 2 | 1.10 | 1.82 | 1.46e-7 | 3 |
Population LoF Frequency
| Population | CAF | p-value | Status |
|---|---|---|---|
| African | 0 | 0.0 | absent |
| Latino/Admixed American | 0 | 0.0 | absent |
| Ashkenazi Jewish | 0.000099 | 0.000099 | rare |
| East Asian | 0 | 0.0 | absent |
| Finnish | 0.000046 | 0.000046 | rare |
| European (Non-Finnish) | 0.0000088 | 0.0000088 | rare |
| South Asian | 0 | 0.0 | absent |
| Other | 0.00016 | 0.00016 | rare |
dbNSFP Gene Annotations
Source:
- Function
- FUNCTION: Predominant cell surface sialoprotein of leukocytes which regulates multiple T-cell functions, including T-cell activation, proliferation, differentiation, trafficking and migration. Positively regulates T-cell trafficking to lymph-nodes via its association with ERM proteins (EZR, RDX and MSN) (By similarity). Negatively regulates Th2 cell differentiation and predisposes the differentiation of T-cells towards a Th1 lineage commitment. Promotes the expression of IFN-gamma by T-cells during T-cell receptor (TCR) activation of naive cells and induces the expression of IFN-gamma by CD4(+) T-cells and to a lesser extent by CD8(+) T-cells (PubMed:18036228). Plays a role in preparing T- cells for cytokine sensing and differentiation into effector cells by inducing the expression of cytokine receptors IFNGR and IL4R, promoting IFNGR and IL4R signaling and by mediating the clustering of IFNGR with TCR (PubMed:24328034). Acts as a major E-selectin ligand responsible for Th17 cell rolling on activated vasculature and recruitment during inflammation. Mediates Th17 cells, but not Th1 cells, adhesion to E-selectin. Acts as a T-cell counter- receptor for SIGLEC1 (By similarity). {ECO:0000250|UniProtKB:P15702, ECO:0000269|PubMed:18036228, ECO:0000269|PubMed:24328034}.;
Recessive Scores
- pRec
- 0.495
Intolerance Scores
- LoFtool
- 0.595
- RVIS EVS
- -0.27
- RVIS percentile EVS
- 34.6
Essentials
- Essential (CRISPR)
- N
- Essential (CRISPR2)
- S
- Essential (gene trap)
- N
- Indispensability pred.
- E
- Indispensability score
- 0.835
Gene Damage Prediction
| All | Recessive | Dominant | |
|---|---|---|---|
| Mendelian | Medium | Medium | Medium |
| Primary Immunodeficiency | Medium | Medium | Medium |
| Cancer | Medium | Medium | Medium |