14-50188639-G-T

Variant names:

• chr14-50188639-G-T
• rs72681869
• NM_006939.4:c.572C>A

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_006939.4(SOS2):​c.572C>A​(p.Pro191His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P191R) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: SOS2 NM_006939.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.75
• Publications: 29 publications found

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 Gene-Disease associations (from GenCC):

• Noonan syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• Noonan syndrome 9

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, G2P, Ambry Genetics, Genomics England PanelApp
• cardiofaciocutaneous syndrome

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
• Costello syndrome

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
• Noonan syndrome with multiple lentigines

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
• Noonan syndrome-like disorder with loose anagen hair

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006939.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SOS2	NM_006939.4	MANE Select	c.572C>A	p.Pro191His	missense	Exon 5 of 23	NP_008870.2	Q07890-1
	SOS2	NM_001411020.1		c.572C>A	p.Pro191His	missense	Exon 5 of 22	NP_001397949.1	Q07890-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SOS2	ENST00000216373.10	TSL:1 MANE Select	c.572C>A	p.Pro191His	missense	Exon 5 of 23	ENSP00000216373.5	Q07890-1
	SOS2	ENST00000543680.5	TSL:1	c.572C>A	p.Pro191His	missense	Exon 5 of 22	ENSP00000445328.1	Q07890-2
	SOS2	ENST00000934708.1		c.713C>A	p.Pro238His	missense	Exon 6 of 24	ENSP00000604767.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 31

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Noonan syndrome 9 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Pathogenic	0.19	D
BayesDel_noAF	Uncertain	0.040
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.78	D
Eigen	Uncertain	0.53
Eigen_PC	Uncertain	0.61
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D
M_CAP	Benign	0.060	D
MetaRNN	Uncertain	0.70	D
MetaSVM	Uncertain	-0.043	T
MutationAssessor	Uncertain	2.2	M
PhyloP100		7.8
PrimateAI	Uncertain	0.71	T
PROVEAN	Uncertain	-4.3	D
REVEL	Uncertain	0.56
Sift	Uncertain	0.0050	D
Sift4G	Pathogenic	0.0010	D
Polyphen		0.81	P
Vest4		0.69
MutPred		0.22		Loss of glycosylation at P191 (P = 0.0565)
MVP		0.71
MPC		1.4
ClinPred		0.99	D
GERP RS		5.5
Varity_R		0.36
gMVP		0.42
Mutation Taster		=67/33	polymorphism

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

Other links and lift over

dbSNP: rs72681869; hg19: chr14-50655357;