ClinVar Miner

Submissions for variant NM_001360.3(DHCR7):c.704T>C (p.Phe235Ser)

dbSNP: rs1555146061
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Total submissions: 2
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Counsyl RCV000665754 SCV000789922 uncertain significance Smith-Lemli-Opitz syndrome 2017-02-27 criteria provided, single submitter clinical testing
Labcorp Genetics (formerly Invitae), Labcorp RCV000665754 SCV001588944 pathogenic Smith-Lemli-Opitz syndrome 2020-05-28 criteria provided, single submitter clinical testing For these reasons, this variant has been classified as Pathogenic. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has been observed in individual(s) with Smith-Lemli-Opitz syndrome (PMID: 15896653, Invitae). In at least one individual the data is consistent with the variant being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 550877). This variant is not present in population databases (ExAC no frequency). This sequence change replaces phenylalanine with serine at codon 235 of the DHCR7 protein (p.Phe235Ser). The phenylalanine residue is highly conserved and there is a large physicochemical difference between phenylalanine and serine.

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