Evidence Repository - Clinical Genome Resources

The ClinGen Evidence Repository is an FDA-recognized human genetic variant database containing expert-curated assertions regarding variants' pathogenicity and supporting evidence summaries. [Disclaimer]

Variant: NM_005633.3(SOS1):c.1654A>G (p.Arg552Gly)

Curation History

CA235350

12871 (ClinVar)

Gene: SOS1

Condition: Noonan syndrome

Inheritance Mode: Autosomal dominant inheritance

Link to MONDO

UUID: b5a21ed5-8cbc-465c-8a14-9be1d1d54011

Approved on: 2017-04-03

Published on: 2018-12-10

HGVS expressions

NM_005633.3:c.1654A>G

NM_005633.3(SOS1):c.1654A>G (p.Arg552Gly)

ENST00000395038.6:c.1654A>G

ENST00000402219.6:c.1654A>G

ENST00000426016.5:c.1654A>G

NC_000002.12:g.39022774T>C

CM000664.2:g.39022774T>C

NC_000002.11:g.39249915T>C

CM000664.1:g.39249915T>C

NC_000002.10:g.39103419T>C

NG_007530.1:g.102690A>G

Pathogenic

PS2_Very Strong PS3 PP3 PP2 PM1 PM2

Evidence Links 0

Expert Panel

RASopathy VCEP

Criteria Specification Information

Criteria Specifications for this VCEP

Evidence submitted by expert panel

RASopathy VCEP

The c.1654A>G (p.Arg552Gly) variant in SOS1 has been reported as a confirmed de novo occurrence in at least 2 patients with clinical features of a RASopathy (PS2_VeryStrong; PMID 17143282). This variant was absent from large population studies (PM2; ExAC, http://exac.broadinstitute.org). In vitro functional studies provide some evidence that the p.Arg552Gly variant may impact protein function (PS3; PMID: 17143282). The variant is located in the SOS1 gene, which has been defined by the ClinGen RASopathy Expert Panel as a gene with a low rate of benign missense variants and pathogenic missense variants are common (PP2; PMID: 29493581). Furthermore, the variant is in a location that has been defined by the ClinGen RASopathy Expert Panel to be a mutational hotspot or domain of SOS1 (PM1; PMID 29493581). Computational prediction tools and conservation analysis suggest that the p.Arg552Gly variant may impact the protein (PP3). In summary, this variant meets criteria to be classified as pathogenic for RASopathies in an autosomal dominant manner. Rasopathy-specific ACMG/AMP criteria applied (PMID:29493581): PP2, PP3, PM1, PM2, PS3, PS2_VeryStrong.

PS2_Very Strong

The c.1654A>G (p.Arg552Gly) variant in SOS1 has been reported as a confirmed de novo occurrence in at least 2 patients with clinical features of a RASopathy (PS2_VeryStrong; PMID 17143282).

PS3

In vitro functional studies provide some evidence that the p.Arg552Gly variant may impact protein function (PS3; PMID: 17143282).

PP3

Computational prediction tools and conservation analysis suggest that the p.Arg552Gly variant may impact the protein (PP3).

PP2

The variant is located in the SOS1 gene, which has been defined by the ClinGen RASopathy Expert Panel as a gene with a low rate of benign missense variants and pathogenic missense variants are common (PP2; PMID: 29493581).

PM1

Furthermore, the variant is in a location that has been defined by the ClinGen RASopathy Expert Panel to be a mutational hotspot or domain of SOS1 (PM1; PMID 29493581).

PM2

No code specific comments provided, please refer to the summary above or general recommendations provided in the guideline

Curation History

The information on this website is not intended for direct diagnostic use or medical decision-making without review by a genetics professional. Individuals should not change their health behavior solely on the basis of information contained on this website. If you have questions about the information contained on this website, please see a health care professional.