rs1555322175

Positions:

• chr14-50199705-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_006939.4(SOS2):​c.496A>G​(p.Met166Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000689 in 1,452,234 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: SOS2 NM_006939.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.02

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 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.769

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SOS2	NM_006939.4	c.496A>G	p.Met166Val	missense_variant	4/23	ENST00000216373.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SOS2	ENST00000216373.10	c.496A>G	p.Met166Val	missense_variant	4/23	1	NM_006939.4	P1
SOS2	ENST00000543680.5	c.496A>G	p.Met166Val	missense_variant	4/22	1
SOS2	ENST00000555666.1	n.675A>G		non_coding_transcript_exon_variant	4/4	4
SOS2	ENST00000556469.5	n.467A>G		non_coding_transcript_exon_variant	4/5	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.89e-7 AC: 1 AN: 1452234 Hom.: 0 Cov.: 27 AF XY: 0.00000138 AC XY: 1 AN XY: 722504

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.04e-7

Gnomad4 OTH exome AF: 0.00

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

Center For Human Genetics And Laboratory Diagnostics, Dr. Klein, Dr. Rost And Colleagues

May 19, 2017

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.63
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.14
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.70	D;.
Eigen	Uncertain	0.53
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.90	D;D
M_CAP	Benign	0.064	D
MetaRNN	Pathogenic	0.77	D;D
MetaSVM	Benign	-0.48	T
MutationAssessor	Benign	0.85	L;L
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.76	T
PROVEAN	Uncertain	-2.8	D;D
REVEL	Uncertain	0.51
Sift	Uncertain	0.0030	D;D
Sift4G	Pathogenic	0.0010	D;D
Polyphen		0.99	D;.
Vest4		0.87
MutPred		0.57		Loss of ubiquitination at K163 (P = 0.079);Loss of ubiquitination at K163 (P = 0.079);
MVP		0.77
MPC		1.5
ClinPred		0.97	D
GERP RS		4.8
Varity_R		0.50
gMVP		0.65

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs1555322175; hg19: chr14-50666423;