15-66703482-G-A

Variant names:

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_005585.5(SMAD6):c.224G>A(p.Arg75Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000187 in 1,237,406 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/22 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 0.00032 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00017 ( 2 hom. )

Consequence

SMAD6
NM_005585.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:3

Conservation

PhyloP100: 1.09

Publications

2 publications found

Variant links:

Genes affected

SMAD6 (HGNC:6772): (SMAD family member 6) The protein encoded by this gene belongs to the SMAD family of proteins, which are related to Drosophila 'mothers against decapentaplegic' (Mad) and C. elegans Sma. SMAD proteins are signal transducers and transcriptional modulators that mediate multiple signaling pathways. This protein functions in the negative regulation of BMP and TGF-beta/activin-signalling. Multiple transcript variants have been found for this gene.[provided by RefSeq, Sep 2014]

SMAD6 Gene-Disease associations (from GenCC):

syndromic craniosynostosis
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
craniosynostosis 7
Inheritance: AD, Unknown Classification: STRONG, MODERATE, LIMITED Submitted by: PanelApp Australia, Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
radioulnar synostosis, nonsyndromic, susceptibility to
Inheritance: AD Classification: STRONG Submitted by: PanelApp Australia, Ambry Genetics
aortic valve disease 2
Inheritance: Unknown, AD Classification: MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, PanelApp Australia
familial bicuspid aortic valve
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
congenital radioulnar synostosis
Inheritance: AR, Unknown Classification: SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Orphanet
congenital heart defects, multiple types
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

SMAD6 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.06083551).

BP6

Variant 15-66703482-G-A is Benign according to our data. Variant chr15-66703482-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 471752.

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.000324 (49/151410) while in subpopulation EAS AF = 0.00783 (40/5108). AF 95% confidence interval is 0.00591. There are 1 homozygotes in GnomAd4. There are 22 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 2 AD,AR,Unknown gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005585.5. 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
	SMAD6	NM_005585.5	MANE Select	c.224G>A	p.Arg75Gln	missense	Exon 1 of 4	NP_005576.3
	SMAD6	NR_027654.2		n.1247G>A		non_coding_transcript_exon	Exon 1 of 5

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SMAD6	ENST00000288840.10	TSL:1 MANE Select	c.224G>A	p.Arg75Gln	missense	Exon 1 of 4	ENSP00000288840.5	O43541-1
SMAD6	ENST00000557916.5	TSL:1	n.224G>A		non_coding_transcript_exon	Exon 1 of 5	ENSP00000452955.1	O43541-4
SMAD6	ENST00000966143.1		c.224G>A	p.Arg75Gln	missense	Exon 1 of 3	ENSP00000636202.1

Frequencies

GnomAD3 genomes

AF:

0.000330

AC:

AN:

151304

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00800

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000738

Gnomad OTH

AF:

0.000481

GnomAD2 exomes

AF:

0.00

AC:

AN:

7922

AF XY:

0.00

Gnomad AFR exome

AF:

0.00

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000168

AC:

182

AN:

1085996

Hom.:

Cov.:

AF XY:

0.000134

AC XY:

AN XY:

514186

show subpopulations

African (AFR)

AF:

0.0000445

AC:

AN:

22492

American (AMR)

AF:

0.00

AC:

AN:

8074

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

13886

East Asian (EAS)

AF:

0.00418

AC:

108

AN:

25824

South Asian (SAS)

AF:

0.000101

AC:

AN:

19894

European-Finnish (FIN)

AF:

0.00

AC:

AN:

31080

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2878

European-Non Finnish (NFE)

AF:

0.00000653

AC:

AN:

918740

Other (OTH)

AF:

0.00151

AC:

AN:

43128

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.514

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

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

GnomAD4 genome

AF:

0.000324

AC:

AN:

151410

Hom.:

Cov.:

AF XY:

0.000297

AC XY:

AN XY:

74014

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41400

American (AMR)

AF:

0.000197

AC:

AN:

15222

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00783

AC:

AN:

5108

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10342

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.0000738

AC:

AN:

67738

Other (OTH)

AF:

0.000476

AC:

AN:

2100

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.490

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.000214

Hom.:

Bravo

AF:

0.000366

ExAC

AF:

0.000127

AC:

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Aortic valve disease 2 (1)

Inborn genetic diseases (1)

not specified (1)

SMAD6-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.37

CADD

Benign

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.35

Eigen

Benign

-0.16

Eigen_PC

Benign

-0.12

FATHMM_MKL

Benign

0.65

LIST_S2

Benign

0.67

M_CAP

Pathogenic

0.88

MetaRNN

Benign

0.061

MetaSVM

Benign

-0.82

MutationAssessor

Benign

1.1

PhyloP100

1.1

PrimateAI

Pathogenic

0.96

PROVEAN

Benign

-0.72

REVEL

Benign

0.19

Sift

Benign

0.10

Sift4G

Benign

0.12

Polyphen

0.96

Vest4

0.15

MutPred

0.41

Loss of methylation at R75 (P = 0.0231)

MVP

0.82

MPC

1.5

ClinPred

0.77

GERP RS

3.5

Varity_R

0.16

gMVP

0.30

Mutation Taster

=87/13

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