ClinVar Miner

Submissions for variant NM_000020.3(ACVRL1):c.122G>A (p.Cys41Tyr)

dbSNP: rs1184716348
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Total submissions: 1
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Labcorp Genetics (formerly Invitae), Labcorp RCV001065552 SCV001230513 likely pathogenic Telangiectasia, hereditary hemorrhagic, type 2 2020-01-30 criteria provided, single submitter clinical testing In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. This variant disrupts the p.Cys41 amino acid residue in ACVRL1. Other variant(s) that disrupt this residue have been observed in individuals with ACVRL1-related conditions (PMID: 26176610, 16429404), suggesting that it is a clinically significant residue. As a result, variants that disrupt this residue are likely to be causative of disease. This variant has been reported to affect ACVRL1 protein function (PMID: 26176610). This variant affects a cysteine residue located within the ACVRL1 protein ectodomain. Cysteine residues in this domain of ACVRL1 are involved in the formation of disulfide bridges critical for protein structure and stability (PMID: 22028876, 22718755, 22799562). In addition, missense substitutions within the ACVRL1 ectodomain affecting cysteine residues are overrepresented in patients with HHT (PMID: 20501893, 26176610 and www.hhtmutation.org). This variant has been observed in an individual affected with hereditary hemorrhagic telangiectasia (PMID: 26176610). This variant is not present in population databases (ExAC no frequency). This sequence change replaces cysteine with tyrosine at codon 41 of the ACVRL1 protein (p.Cys41Tyr). The cysteine residue is highly conserved and there is a large physicochemical difference between cysteine and tyrosine.

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