HHLA1
protein-codingHERV-H LTR-associating 1
Gene summary
Predicted to be located in extracellular region. [provided by Alliance of Genome Resources, Jul 2025]
- PLA2L
MANE transcript
Inheritance
ClinVar variants
Top phenotype
gnomAD constraint
Max pathogenic AF
Genomic locus
External References & Databases
Transcript & Mutation Effects
hg38 • Region Span ~49.7 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 HHLA1 variants in ClinVar
ClinVar Variants & Pathogenicity by Type
Statistics based on transcript NM_001145095.3. 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 | 88 | 8 | 96 | |||
| nonsense | 0 | |||||
| start loss | 0 | |||||
| frameshift | 1 | 1 | ||||
| splice donor/acceptor (+/-2bp) | 0 | |||||
| Total | 0 | 0 | 89 | 9 | 0 | 98 |
Transcript Catalog
Annotated transcript isoforms across RefSeq and Ensembl databases
| Transcript ID | Source | Protein ID | Coding Exons | MANE Status |
|---|---|---|---|---|
| RefSeq | NP_001138567.1 | 16 | MANE Select | |
| Ensembl | ENSP00000388322.1 | 16 | MANE Select | |
| Ensembl | ENSP00000500443.1 | 17 | Standard | |
| Ensembl | ENSP00000500443.1 | 17 | Standard |
Gene Ontology (GO) Annotations & Pathways
Biological processes, molecular functions, cellular components and pathways
Cellular Component
- extracellular region
gnomAD Constraint
Source:
- Gene type
- protein_coding
- Transcript type
- protein_coding
- Transcript
- ENST00000434736
- Coding exons
- 16
- Length
- 49674
- 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 | 0.705 | 247 | 280 | 0.881 | 0.0000139 | 3488 |
| Missense (PolyPhen) | 57 | 72.565 | 0.78551 | 994 | ||
| Synonymous | 0.686 | 95 | 104 | 0.914 | 0.00000560 | 1075 |
| Loss of Function | 0.659 | 23 | 26.7 | 0.862 | 0.00000113 | 353 |
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:
Essentials
- Essential (CRISPR2)
- N
- Indispensability pred.
- N
- Indispensability score
- 0.114
Gene Damage Prediction
| All | Recessive | Dominant | |
|---|---|---|---|
| Mendelian | Medium | Medium | Medium |
| Primary Immunodeficiency | Medium | Medium | Medium |
| Cancer | Medium | Medium | Medium |