--- title: "ADA A329V (c.986C>T, rs121908715) | Dante Labs" description: "ClinVar classifies ADA A329V as Pathogenic (reviewed by expert panel). Where it sits in the genome, its predicted effect, and the Genome Test reports that look at it." url: "https://dantelabs.com/genes/ada/variants/a329v" --- 1. [Genes](https://dantelabs.com/genes) 2. [ADA](https://dantelabs.com/genes/ada) 3. ADA A329V Variant # ADA A329V NM_000022.4(ADA):c.986C>T (p.Ala329Val) Also known as - p.Ala329Val - p.A329V - rs121908715 * ClinVar classification Pathogenic * Review status 3 stars out of 4 reviewed by expert panel * Last evaluated 21 February 2024 * Expert panel ClinGen Severe Combined Immunodeficiency Variant Curation Expert Panel, ClinGen Data current to ClinVar release 2026-10-12 · Dante Labs data release 2026.10.16-c6eea6bf Facts last changed 16 October 2026 ## Summary A329V is a missense variant in ADA: it changes a single amino acid in the protein the gene encodes. ClinVar classifies it as pathogenic for severe combined immunodeficiency, autosomal recessive, T cell-negative, B cell-negative, NK cell-negative, due to adenosine deaminase deficiency (reviewed by expert panel). ## ClinVar classifications | Condition | Classification | Review status | Submissions | Last evaluated | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------- | ----------------------------------------- | ------------ | ---------------- | | severe combined immunodeficiency, autosomal recessive, T cell-negative, B cell-negative, NK cell-negative, due to adenosine deaminase deficiency[ClinVar VCV000001959 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/clinvar/variation/1959/) | Pathogenic | 3 stars out of 4 reviewed by expert panel | 1 submission | 21 February 2024 | Classifications as ClinVar records them in release 2026-10-12. ClinVar updates them as evidence is reviewed. ## Where it lies in ADA A329V lies in exon 11 of the 12 in ADA's MANE Select transcript, NM_000022.4. [ADA variants in exon 11 →](https://dantelabs.com/genes/ada/variants?exon=11) [ADA's gene diagram →](https://dantelabs.com/genes/ada#gene-structure) ## Molecular details | Gene | [ADA](https://dantelabs.com/genes/ada) | | --------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- | | Transcript | NM_000022.4 MANE Select | | Coding DNA change (HGVS c.) | c.986C>T | | Protein change (HGVS p.) | p.Ala329Val p.A329V | | Predicted consequence | Missense [missense_variant (opens in a new tab)](https://purl.obolibrary.org/obo/SO_0001583) | | Predicted impact | Moderate | | Position (GRCh38) | chr20:44620391 G>A | | Position (GRCh37) | chr20:43249032 G>A | | dbSNP ID | [rs121908715 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/snp/rs121908715) | | ClinVar Variation ID | [VCV000001959 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/clinvar/variation/1959/) | | ClinVar Allele ID | 16998 | | ClinGen Allele Registry ID | [CA252004 (opens in a new tab)](https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_canonicalid?canonicalid=CA252004) | | ClinVar name | NM_000022.4(ADA):c.986C>T (p.Ala329Val) | ## ADA A329V in other databases - [ClinVar VCV000001959 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/clinvar/variation/1959/) - [dbSNP rs121908715 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/snp/rs121908715) - [ClinGen Allele Registry CA252004 (opens in a new tab)](https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_canonicalid?canonicalid=CA252004) - [gnomAD 20-44620391-G-A (opens in a new tab)](https://gnomad.broadinstitute.org/variant/20-44620391-G-A?dataset=gnomad_r4) - [Ensembl rs121908715 (opens in a new tab)](https://www.ensembl.org/Homo_sapiens/Variation/Explore?v=rs121908715) ## Reports that look at this variant (2) These Genome Test condition reports include A329V among the variants they look at. | Report | Conditions | Inheritance | | ----------------------------------------------------------------------------------------------------- | -------------------------------- | ------------------- | | [Other Inborn Errors of Immunity](https://dantelabs.com/conditions/immunodeficiency-disease) | Immunodeficiency Disease | | | [Severe Combined Immunodeficiency](https://dantelabs.com/conditions/severe-combined-immunodeficiency) | Severe Combined Immunodeficiency | Autosomal recessive | ## Other variants in ADA - [c.219-2A>G Likely pathogenic 3 stars out of 4](https://dantelabs.com/genes/ada/variants/c-219-2a-g) - [c.363-2A>G Likely pathogenic 3 stars out of 4](https://dantelabs.com/genes/ada/variants/c-363-2a-g) - [c.603C>A Likely pathogenic 3 stars out of 4](https://dantelabs.com/genes/ada/variants/c-603c-a) - [c.606+1G>T Likely pathogenic 3 stars out of 4](https://dantelabs.com/genes/ada/variants/c-606plus1g-t) - [c.975+1G>A Pathogenic 3 stars out of 4](https://dantelabs.com/genes/ada/variants/c-975plus1g-a) - [c.976-1G>C Pathogenic 3 stars out of 4](https://dantelabs.com/genes/ada/variants/c-976-1g-c) - [c.1078+2T>A Likely pathogenic 3 stars out of 4](https://dantelabs.com/genes/ada/variants/c-1078plus2t-a) - [E255X Likely pathogenic 3 stars out of 4](https://dantelabs.com/genes/ada/variants/e255x) - [G216R Pathogenic 3 stars out of 4](https://dantelabs.com/genes/ada/variants/g216r) - [G239D Pathogenic 3 stars out of 4](https://dantelabs.com/genes/ada/variants/g239d) [All ADA variants](https://dantelabs.com/genes/ada/variants) ## Limitations This page describes publicly available information about a genetic variant. It is not a diagnosis, and it says nothing about whether you or anyone else carries this variant. Classifications come from ClinVar and change as new evidence is reviewed. A classification here may differ from the one in ClinVar today, or from the one a laboratory reports. Whole genome sequencing with short reads can miss or miscall some variants, particularly in repeated or highly similar stretches of DNA and in large insertions, deletions or rearrangements. If you have questions about a variant in your own results or in your family, talk to a genetic counsellor or your doctor. ## Sources & credits - Classifications from ClinVar (release 2026-10-12), National Center for Biotechnology Information. - Condition terms from the Mondo Disease Ontology (release 2026-10-06), used under CC BY 4.0. - Gene symbols and names from the HUGO Gene Nomenclature Committee (release 2026-10-16). - Allele identifiers from the ClinGen Allele Registry (release 2026-10-16-c4908f54). - Reference SNP identifiers from dbSNP (release b157), National Center for Biotechnology Information. - Gene–disease links from the Gene Curation Coalition, GenCC (release 2026-10-16). - Difficult regions from the Genome in a Bottle Consortium (release v3.6). - Transcripts from MANE (release v1.5), NCBI and EMBL-EBI. - Predicted consequences from mehari (release 0.11.0), with transcript models from cdot. - Built from Dante Labs data release 2026.10.16-c6eea6bf of 16 October 2026. ## Cite this page APA > Dante Labs. (16 October 2026). ADA A329V (c.986C>T, rs121908715) (Version 2026.10.16-c6eea6bf). Retrieved 17 October 2026, from https\://dantelabs.com/genes/ada/variants/a329v Vancouver > Dante Labs. ADA A329V (c.986C>T, rs121908715) \[Internet]. Version 2026.10.16-c6eea6bf. 16 October 2026 \[cited 17 October 2026]. Available from: https\://dantelabs.com/genes/ada/variants/a329v Download citation [RIS](https://dantelabs.com/genes/ada/variants/a329v/cite.ris) [BibTeX](https://dantelabs.com/genes/ada/variants/a329v/cite.bib) [CSL-JSON](https://dantelabs.com/genes/ada/variants/a329v/cite.json) ## Read your whole genome From $449 Free shipping · Results in 6–8 weeks [Explore the Genome Test](https://dantelabs.com/whole-genome-sequencing)