14-50118110-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_006939.4(SOS2):c.*234G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SOS2 NM_006939.4 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.78

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.18).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SOS2	NM_006939.4	c.*234G>A		3_prime_UTR_variant	23/23	ENST00000216373.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SOS2	ENST00000216373.10	c.*234G>A		3_prime_UTR_variant	23/23	1	NM_006939.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 3

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Noonan syndrome 9 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

New York Genome Center

Jul 16, 2021

The de novo c.*234G>A variant identified in the SOS2 gene is the substitution of a moderately conserved Cytosine for Thymine (at the DNA level) in the 3'UTR of SOS2. This variant is absent from gnomAD(v3.1.1) suggesting it is not a common benign variant in the populations represented in that database. This variant is absent from ClinVar and to our current knowledge has not been reported in affected individuals in the literature. While it is present de novo in the affected individual and absent in population databases, the lack of uncertainty regarding the functional consequence of the 3'UTR c.*234G>A variant identified in the SOS2 gene results in its classification as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.18
Cadd	Benign	18
Dann	Benign	0.83

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr14-50584828;