14-50188537-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 0P and 0B.

This summary comes from the ClinGen Evidence Repository: The c.674G>A (NM_006939.4(SOS2):c.674G>A (p.Arg225Gln)) variant in RIT1 is a missense variant predicted to cause substitution of arginine by glutamine at amino acid 225. No ACMG/AMP evidence codes are met. In summary, this variant meets the criteria to be classified as uncertain significance for autosomal dominant RASopathy (Version 2.1; 09/17/2024). LINK:https://erepo.genome.network/evrepo/ui/classification/CA7177479/MONDO:0021060/042

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00012 ( 0 hom. )

Consequence

SOS2
NM_006939.4 missense

Scores

Clinical Significance

Uncertain significance reviewed by expert panel U:5B:2

Conservation

PhyloP100: 7.87

Variant links:

Genes affected

SOS2 (HGNC:11188): (SOS Ras/Rho guanine nucleotide exchange factor 2) This gene encodes a regulatory protein that is involved in the positive regulation of ras proteins. Mutations in this gene are associated with Noonan Syndrome-9. [provided by RefSeq, Jul 2016]

SOS2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SOS2	NM_006939.4 link	c.674G>A	p.Arg225Gln	missense_variant	Exon 5 of 23	ENST00000216373.10	NP_008870.2	Q07890-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SOS2	ENST00000216373.10 link	c.674G>A	p.Arg225Gln	missense_variant	Exon 5 of 23	1	NM_006939.4	ENSP00000216373.5	Q07890-1
SOS2	ENST00000543680.5 link	c.674G>A	p.Arg225Gln	missense_variant	Exon 5 of 22	1		ENSP00000445328.1	Q07890-2
SOS2	ENST00000556469.5 link	n.482-5931G>A		intron_variant	Intron 4 of 4	3

Frequencies

GnomAD3 genomes

AF:

0.0000592

AC:

AN:

152130

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000965

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000296

AC:

AN:

236676

Hom.:

AF XY:

0.0000234

AC XY:

AN XY:

128462

show subpopulations

Gnomad AFR exome

AF:

0.000188

Gnomad AMR exome

AF:

0.0000347

Gnomad ASJ exome

AF:

0.000105

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000181

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000118

AC:

171

AN:

1447962

Hom.:

Cov.:

AF XY:

0.000105

AC XY:

AN XY:

720472

show subpopulations

Gnomad4 AFR exome

AF:

0.0000927

Gnomad4 AMR exome

AF:

0.0000255

Gnomad4 ASJ exome

AF:

0.0000389

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000147

Gnomad4 OTH exome

AF:

0.0000501

GnomAD4 genome

AF:

0.0000592

AC:

AN:

152130

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74324

show subpopulations

Gnomad4 AFR

AF:

0.0000965

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000192

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000136

Hom.:

Bravo

AF:

0.0000756

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5Benign:2

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Noonan syndrome 9

Uncertain:2Benign:1

Dec 02, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Genome-Nilou Lab

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 29, 2019

Revvity Omics, Revvity

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Uncertain:1

Nov 10, 2016

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The R225Q variant has not been published as a pathogenic variant, nor has it been reported as a benign variant to our knowledge. The variant was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. R225Q is a semi-conservative amino acid substitution, which may impact secondary protein structure as these residues differ in some properties. This substitution occurs at a position that is conserved across species, and in silico analysis predicts this variant is probably damaging to the protein structure/function. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -

Cardiovascular phenotype

Uncertain:1

Jan 27, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.674G>A (p.R225Q) alteration is located in exon 5 (coding exon 5) of the SOS2 gene. This alteration results from a G to A substitution at nucleotide position 674, causing the arginine (R) at amino acid position 225 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

RASopathy

Uncertain:1

Sep 17, 2024

ClinGen RASopathy Variant Curation Expert Panel

Significance: Uncertain significance

Review Status: reviewed by expert panel

Collection Method: curation

The c.674G>A (NM_006939.4(SOS2):c.674G>A (p.Arg225Gln)) variant in RIT1 is a missense variant predicted to cause substitution of arginine by glutamine at amino acid 225. No ACMG/AMP evidence codes are met. In summary, this variant meets the criteria to be classified as uncertain significance for autosomal dominant RASopathy (Version 2.1; 09/17/2024). -

not provided

Benign:1

Jan 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

SOS2: BP4 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Uncertain

0.11

BayesDel_noAF

Pathogenic

0.20

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.58

D;.

Eigen

Pathogenic

0.90

Eigen_PC

Pathogenic

0.88

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.95

D;D

M_CAP

Benign

0.046

MetaRNN

Pathogenic

0.85

D;D

MetaSVM

Uncertain

-0.043

MutationAssessor

Uncertain

2.7

M;M

PrimateAI

Uncertain

0.56

PROVEAN

Uncertain

-3.0

D;D

REVEL

Uncertain

0.56

Sift

Benign

0.065

T;T

Sift4G

Pathogenic

0.0010

D;D

Polyphen

1.0

D;.

Vest4

0.93

MVP

0.81

MPC

1.7

ClinPred

0.69

GERP RS

5.8

Varity_R

0.41

gMVP

0.69

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over