--- title: "CFTR A46D (c.137C>A, rs151020603) | Dante Labs" description: "ClinVar classifies CFTR A46D 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/cftr/variants/a46d" --- 1. [Genes](https://dantelabs.com/genes) 2. [CFTR](https://dantelabs.com/genes/cftr) 3. CFTR A46D Variant # CFTR A46D NM_000492.4(CFTR):c.137C>A (p.Ala46Asp) Also known as - p.Ala46Asp - p.A46D - rs151020603 * ClinVar classification Pathogenic * Review status 3 stars out of 4 reviewed by expert panel * Last evaluated 17 March 2017 * Expert panel CFTR2 Data current to ClinVar release 2026-10-12 · Dante Labs data release 2026.10.16-c6eea6bf Facts last changed 16 October 2026 ## Summary A46D is a missense variant in CFTR: it changes a single amino acid in the protein the gene encodes. ClinVar classifies it as pathogenic for Cystic Fibrosis (reviewed by expert panel). ## ClinVar classifications | Condition | Classification | Review status | Submissions | Last evaluated | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------- | ----------------------------------------- | ------------ | -------------- | | [Cystic Fibrosis](https://dantelabs.com/conditions/cystic-fibrosis) [ClinVar VCV000053238 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/clinvar/variation/53238/) | Pathogenic | 3 stars out of 4 reviewed by expert panel | 1 submission | 17 March 2017 | Classifications as ClinVar records them in release 2026-10-12. ClinVar updates them as evidence is reviewed. ## Where it lies in CFTR A46D lies in exon 2 of the 27 in CFTR's MANE Select transcript, NM_000492.4. [CFTR variants in exon 2 →](https://dantelabs.com/genes/cftr/variants?exon=2) [CFTR's gene diagram →](https://dantelabs.com/genes/cftr#gene-structure) ## Molecular details | Gene | [CFTR](https://dantelabs.com/genes/cftr) | | --------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------- | | Transcript | NM_000492.4 MANE Select | | Coding DNA change (HGVS c.) | c.137C>A | | Protein change (HGVS p.) | p.Ala46Asp p.A46D | | Predicted consequence | Missense [missense_variant (opens in a new tab)](https://purl.obolibrary.org/obo/SO_0001583) | | Predicted impact | Moderate | | Position (GRCh38) | chr7:117504336 C>A | | Position (GRCh37) | chr7:117144390 C>A | | dbSNP ID | [rs151020603 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/snp/rs151020603) | | ClinVar Variation ID | [VCV000053238 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/clinvar/variation/53238/) | | ClinVar Allele ID | 67906 | | ClinGen Allele Registry ID | [CA326462 (opens in a new tab)](https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_canonicalid?canonicalid=CA326462) | | ClinVar name | NM_000492.4(CFTR):c.137C>A (p.Ala46Asp) | ## CFTR A46D in other databases - [ClinVar VCV000053238 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/clinvar/variation/53238/) - [dbSNP rs151020603 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/snp/rs151020603) - [ClinGen Allele Registry CA326462 (opens in a new tab)](https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_canonicalid?canonicalid=CA326462) - [gnomAD 7-117504336-C-A (opens in a new tab)](https://gnomad.broadinstitute.org/variant/7-117504336-C-A?dataset=gnomad_r4) - [Ensembl rs151020603 (opens in a new tab)](https://www.ensembl.org/Homo_sapiens/Variation/Explore?v=rs151020603) ## Reports that look at this variant (1) These Genome Test condition reports include A46D among the variants they look at. | Report | Conditions | Inheritance | | ------------------------------------------------------------------- | --------------- | ------------------- | | [Cystic Fibrosis](https://dantelabs.com/conditions/cystic-fibrosis) | Cystic Fibrosis | Autosomal recessive | ## Other variants in CFTR - [A455E Pathogenic 4 stars out of 4](https://dantelabs.com/genes/cftr/variants/a455e) - [c.489+1G>T621+1G>T Pathogenic 4 stars out of 4](https://dantelabs.com/genes/cftr/variants/c-489plus1g-t) - [c.579+1G>T711+1G>T Pathogenic 4 stars out of 4](https://dantelabs.com/genes/cftr/variants/c-579plus1g-t) - [c.1585-1G>A1717-1G->A Pathogenic 4 stars out of 4](https://dantelabs.com/genes/cftr/variants/c-1585-1g-a) - [c.1766+1G>A1898+1G>A Pathogenic 4 stars out of 4](https://dantelabs.com/genes/cftr/variants/c-1766plus1g-a) - [c.2657+5G>A2789+5G>A Pathogenic 4 stars out of 4](https://dantelabs.com/genes/cftr/variants/c-2657plus5g-a) - [c.2988+1G>A3120+1G>A Pathogenic 4 stars out of 4](https://dantelabs.com/genes/cftr/variants/c-2988plus1g-a) - [c.3718-2477C>T3849+10kbC->T Pathogenic 4 stars out of 4](https://dantelabs.com/genes/cftr/variants/c-3718-2477c-t) - [F508del Pathogenic 4 stars out of 4](https://dantelabs.com/genes/cftr/variants/f508del) - [G85E Pathogenic 4 stars out of 4](https://dantelabs.com/genes/cftr/variants/g85e) [All CFTR variants](https://dantelabs.com/genes/cftr/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). CFTR A46D (c.137C>A, rs151020603) (Version 2026.10.16-c6eea6bf). Retrieved 17 October 2026, from https\://dantelabs.com/genes/cftr/variants/a46d Vancouver > Dante Labs. CFTR A46D (c.137C>A, rs151020603) \[Internet]. Version 2026.10.16-c6eea6bf. 16 October 2026 \[cited 17 October 2026]. Available from: https\://dantelabs.com/genes/cftr/variants/a46d Download citation [RIS](https://dantelabs.com/genes/cftr/variants/a46d/cite.ris) [BibTeX](https://dantelabs.com/genes/cftr/variants/a46d/cite.bib) [CSL-JSON](https://dantelabs.com/genes/cftr/variants/a46d/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)