NM_005585.5:c.3G>A

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1PM2

The NM_005585.5(SMAD6):c.3G>A(p.Met1?) variant causes a start lost change. The variant allele was found at a frequency of 0.0000034 in 1,468,774 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000015 ( 0 hom. )

Consequence

SMAD6
NM_005585.5 start_lost

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 5.31

Publications

0 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):

craniosynostosis 7
Inheritance: AD, Unknown Classification: STRONG, MODERATE, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics, PanelApp Australia
radioulnar synostosis, nonsyndromic, susceptibility to
Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics
aortic valve disease 2
Inheritance: AD, Unknown Classification: MODERATE, LIMITED Submitted by: Ambry Genetics, PanelApp Australia, Labcorp Genetics (formerly Invitae)
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: Pathogenic. The variant received 10 ACMG points.

PVS1

Start lost variant, next in-frame start position is after 27 pathogenic variants. Next in-frame start position is after 93 codons. Genomic position: 66703535. Lost 0.186 part of the original CDS.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMAD6	NM_005585.5 link	c.3G>A	p.Met1?	start_lost	Exon 1 of 4	ENST00000288840.10	NP_005576.3	O43541-1
SMAD6	NR_027654.2 link	n.1026G>A		non_coding_transcript_exon_variant	Exon 1 of 5
SMAD6	XR_931827.3 link	n.1026G>A		non_coding_transcript_exon_variant	Exon 1 of 4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
SMAD6	ENST00000288840.10 link	c.3G>A	p.Met1?	start_lost	Exon 1 of 4	1	NM_005585.5	ENSP00000288840.5	O43541-1
SMAD6	ENST00000557916.5 link	n.3G>A		non_coding_transcript_exon_variant	Exon 1 of 5	1		ENSP00000452955.1	O43541-4
SMAD6	ENST00000612349.1 link	n.185G>A		non_coding_transcript_exon_variant	Exon 1 of 1	6

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152058

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000152

AC:

AN:

1316716

Hom.:

Cov.:

AF XY:

0.00000154

AC XY:

AN XY:

650214

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26262

American (AMR)

AF:

0.00

AC:

AN:

23880

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

22674

East Asian (EAS)

AF:

0.00

AC:

AN:

28730

South Asian (SAS)

AF:

0.00

AC:

AN:

70160

European-Finnish (FIN)

AF:

0.00

AC:

AN:

46832

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4040

European-Non Finnish (NFE)

AF:

0.00000192

AC:

AN:

1040620

Other (OTH)

AF:

0.00

AC:

AN:

53518

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152058

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74284

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.0000483

AC:

AN:

41406

American (AMR)

AF:

0.00

AC:

AN:

15276

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10586

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67982

Other (OTH)

AF:

0.00

AC:

AN:

2090

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.038550), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000142

Hom.:

Bravo

AF:

0.0000113

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.39

BayesDel_noAF

Pathogenic

0.33

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.53

Eigen

Uncertain

0.54

Eigen_PC

Uncertain

0.51

FATHMM_MKL

Uncertain

0.88

LIST_S2

Uncertain

0.90

M_CAP

Pathogenic

0.92

MetaRNN

Pathogenic

0.99

MetaSVM

Uncertain

0.22

PhyloP100

5.3

PROVEAN

Benign

-1.5

REVEL

Pathogenic

0.66

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

0.92

Vest4

0.93

MutPred

0.99

Loss of methylation at R3 (P = 0.1067);

MVP

0.81

ClinPred

1.0

GERP RS

3.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

Varity_R

0.94

gMVP

0.56

Mutation Taster

=8/192

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.040

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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NM_005585.5:c.3G>A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over