Genetic Variant NM_005633.4:c.3418T>A (chr2-38987565-A-T) – ACMG Classification: Benign (-11 pts)

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 0P and 11B. BP4_ModerateBP6BS1BS2

The NM_005633.4(SOS1):c.3418T>A(p.Leu1140Ile) variant causes a missense change. The variant allele was found at a frequency of 0.00016 in 1,589,486 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00017 ( 0 hom. )

Consequence

SOS1
NM_005633.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:3B:4

Conservation

PhyloP100: 6.53

Publications

3 publications found

Variant links:

COSMIC-nc: COSV105933693

Genes affected

SOS1 (HGNC:11187): (SOS Ras/Rac guanine nucleotide exchange factor 1) This gene encodes a protein that is a guanine nucleotide exchange factor for RAS proteins, membrane proteins that bind guanine nucleotides and participate in signal transduction pathways. GTP binding activates and GTP hydrolysis inactivates RAS proteins. The product of this gene may regulate RAS proteins by facilitating the exchange of GTP for GDP. Mutations in this gene are associated with gingival fibromatosis 1 and Noonan syndrome type 4. [provided by RefSeq, Jul 2008]

SOS1 Gene-Disease associations (from GenCC):

Noonan syndrome
Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
Noonan syndrome 4
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, PanelApp Australia, Genomics England PanelApp
fibromatosis, gingival, 1
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
hereditary gingival fibromatosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
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

SOS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -11 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.10692337).

BP6

Variant 2-38987565-A-T is Benign according to our data. Variant chr2-38987565-A-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 40729.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.0000788 (12/152200) while in subpopulation NFE AF = 0.000147 (10/68034). AF 95% confidence interval is 0.0000791. There are 0 homozygotes in GnomAd4. There are 8 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 12 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005633.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SOS1	NM_005633.4	MANE Select	c.3418T>A	p.Leu1140Ile	missense	Exon 22 of 23	NP_005624.2
SOS1	NM_001382394.1		c.3397T>A	p.Leu1133Ile	missense	Exon 22 of 23	NP_001369323.1
SOS1	NM_001382395.1		c.3373T>A	p.Leu1125Ile	missense	Exon 21 of 22	NP_001369324.1	G5E9C8

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SOS1	ENST00000402219.8	TSL:1 MANE Select	c.3418T>A	p.Leu1140Ile	missense	Exon 22 of 23	ENSP00000384675.2	Q07889-1
SOS1	ENST00000395038.6	TSL:5	c.3373T>A	p.Leu1125Ile	missense	Exon 21 of 22	ENSP00000378479.2	G5E9C8
SOS1	ENST00000913801.1		c.3298T>A	p.Leu1100Ile	missense	Exon 21 of 22	ENSP00000583860.1

Frequencies

GnomAD3 genomes

AF:

0.0000788

AC:

AN:

152200

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000206

AC:

AN:

243008

AF XY:

0.0000152

show subpopulations

Gnomad AFR exome

AF:

0.0000646

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000367

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000169

AC:

243

AN:

1437286

Hom.:

Cov.:

AF XY:

0.000151

AC XY:

108

AN XY:

716170

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32940

American (AMR)

AF:

0.0000226

AC:

AN:

44244

Ashkenazi Jewish (ASJ)

AF:

0.0000387

AC:

AN:

25818

East Asian (EAS)

AF:

0.00

AC:

AN:

39480

South Asian (SAS)

AF:

0.00

AC:

AN:

85020

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53034

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5706

European-Non Finnish (NFE)

AF:

0.000219

AC:

239

AN:

1091580

Other (OTH)

AF:

0.0000336

AC:

AN:

59464

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.460

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000788

AC:

AN:

152200

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74338

show subpopulations

African (AFR)

AF:

0.0000482

AC:

AN:

41456

American (AMR)

AF:

0.00

AC:

AN:

15268

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5200

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000147

AC:

AN:

68034

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.438

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0000559

Hom.:

Bravo

AF:

0.0000604

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000247

AC:

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Noonan syndrome 4 (2)

not specified (2)

Cardiovascular phenotype (1)

not provided (1)

RASopathy (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.079

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.41

CADD

Benign

(source)

DANN

Benign

0.92

DEOGEN2

Benign

0.38

Eigen

Benign

-0.39

Eigen_PC

Benign

-0.22

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.86

M_CAP

Benign

0.026

MetaRNN

Benign

0.11

MetaSVM

Benign

-0.84

MutationAssessor

Benign

1.0

PhyloP100

6.5

PrimateAI

Uncertain

0.63

PROVEAN

Benign

-0.57

REVEL

Benign

0.19

Sift

Benign

0.19

Sift4G

Benign

0.43

Polyphen

0.010

Vest4

0.27

MVP

0.32

MPC

0.11

ClinPred

0.11

GERP RS

3.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.046

gMVP

0.065

Mutation Taster

=85/15

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over