--- title: "ENG N423S (c.1268A>G, rs1830431553) | Dante Labs" description: "ClinVar classifies ENG N423S as Likely 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/eng/variants/n423s" --- 1. [Genes](https://dantelabs.com/genes) 2. [ENG](https://dantelabs.com/genes/eng) 3. ENG N423S Variant # ENG N423S NM_001114753.3(ENG):c.1268A>G (p.Asn423Ser) Also known as - p.Asn423Ser - p.N423S - rs1830431553 * ClinVar classification Likely pathogenic * Review status 3 stars out of 4 reviewed by expert panel * Last evaluated 12 November 2024 * Expert panel ClinGen Hereditary Hemorrhagic Telangiectasia 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 N423S is a missense variant in ENG: it changes a single amino acid in the protein the gene encodes. ClinVar classifies it as likely pathogenic for Telangiectasia, Hereditary Hemorrhagic, Type 1 (reviewed by expert panel). ## ClinVar classifications | Condition | Classification | Review status | Submissions | Last evaluated | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------- | ----------------------------------------- | ------------ | ---------------- | | [Telangiectasia, Hereditary Hemorrhagic, Type 1](https://dantelabs.com/conditions/hereditary-hemorrhagic-telangiectasia) [ClinVar VCV000982495 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/clinvar/variation/982495/) | Likely pathogenic | 3 stars out of 4 reviewed by expert panel | 1 submission | 12 November 2024 | Classifications as ClinVar records them in release 2026-10-12. ClinVar updates them as evidence is reviewed. ## Where it lies in ENG N423S lies in exon 9 of the 15 in ENG's MANE Select transcript, NM_001114753.3. [ENG variants in exon 9 →](https://dantelabs.com/genes/eng/variants?exon=9) [ENG's gene diagram →](https://dantelabs.com/genes/eng#gene-structure) ## Molecular details | Gene | [ENG](https://dantelabs.com/genes/eng) | | --------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------- | | Transcript | NM_001114753.3 MANE Select | | Coding DNA change (HGVS c.) | c.1268A>G | | Protein change (HGVS p.) | p.Asn423Ser p.N423S | | Predicted consequence | Missense [missense_variant (opens in a new tab)](https://purl.obolibrary.org/obo/SO_0001583) | | Predicted impact | Moderate | | Position (GRCh38) | chr9:127819904 T>C | | Position (GRCh37) | chr9:130582183 T>C | | dbSNP ID | [rs1830431553 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/snp/rs1830431553) | | ClinVar Variation ID | [VCV000982495 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/clinvar/variation/982495/) | | ClinVar Allele ID | 970579 | | ClinGen Allele Registry ID | [CA374978246 (opens in a new tab)](https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_canonicalid?canonicalid=CA374978246) | | ClinVar name | NM_001114753.3(ENG):c.1268A>G (p.Asn423Ser) | ## ENG N423S in other databases - [ClinVar VCV000982495 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/clinvar/variation/982495/) - [dbSNP rs1830431553 (opens in a new tab)](https://www.ncbi.nlm.nih.gov/snp/rs1830431553) - [ClinGen Allele Registry CA374978246 (opens in a new tab)](https://reg.clinicalgenome.org/redmine/projects/registry/genboree_registry/by_canonicalid?canonicalid=CA374978246) - [gnomAD 9-127819904-T-C (opens in a new tab)](https://gnomad.broadinstitute.org/variant/9-127819904-T-C?dataset=gnomad_r4) - [Ensembl rs1830431553 (opens in a new tab)](https://www.ensembl.org/Homo_sapiens/Variation/Explore?v=rs1830431553) ## Reports that look at this variant (1) These Genome Test condition reports include N423S among the variants they look at. | Report | Conditions | Inheritance | | --------------------------------------------------------------------------------------------------------------- | ---------------------------------------------- | ------------------ | | [Hereditary Hemorrhagic Telangiectasia](https://dantelabs.com/conditions/hereditary-hemorrhagic-telangiectasia) | Hereditary Hemorrhagic Telangiectasia | Autosomal dominant | | | Telangiectasia, Hereditary Hemorrhagic, Type 1 | Autosomal dominant | | | Telangiectasis | | ## Other variants in ENG - [c.2T>G Pathogenic 3 stars out of 4](https://dantelabs.com/genes/eng/variants/c-2t-g) - [C382Y Pathogenic 3 stars out of 4](https://dantelabs.com/genes/eng/variants/c382y) - [C549G Likely pathogenic 3 stars out of 4](https://dantelabs.com/genes/eng/variants/c549g) - [G331S Pathogenic 3 stars out of 4](https://dantelabs.com/genes/eng/variants/g331s) - [G603R Likely pathogenic 3 stars out of 4](https://dantelabs.com/genes/eng/variants/g603r) - [L221P Likely pathogenic 3 stars out of 4](https://dantelabs.com/genes/eng/variants/l221p) - [L506H Likely pathogenic 3 stars out of 4](https://dantelabs.com/genes/eng/variants/l506h) - [R529H Pathogenic 3 stars out of 4](https://dantelabs.com/genes/eng/variants/r529h) - [V440G Likely pathogenic 3 stars out of 4](https://dantelabs.com/genes/eng/variants/v440g) - [V568Sfs\*5 Pathogenic 3 stars out of 4](https://dantelabs.com/genes/eng/variants/v568sfs5) [All ENG variants](https://dantelabs.com/genes/eng/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). ENG N423S (c.1268A>G, rs1830431553) (Version 2026.10.16-c6eea6bf). Retrieved 16 October 2026, from https\://dantelabs.com/genes/eng/variants/n423s Vancouver > Dante Labs. ENG N423S (c.1268A>G, rs1830431553) \[Internet]. Version 2026.10.16-c6eea6bf. 16 October 2026 \[cited 16 October 2026]. Available from: https\://dantelabs.com/genes/eng/variants/n423s Download citation [RIS](https://dantelabs.com/genes/eng/variants/n423s/cite.ris) [BibTeX](https://dantelabs.com/genes/eng/variants/n423s/cite.bib) [CSL-JSON](https://dantelabs.com/genes/eng/variants/n423s/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)