15-66703511-C-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP4

The NM_005585.5(SMAD6):c.253C>T(p.Arg85Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000875 in 1,223,168 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000084 ( 1 hom. )

Consequence

SMAD6
NM_005585.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.0510

Publications

1 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: Likely_benign. The variant received -1 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.3240858).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMAD6	NM_005585.5 link	c.253C>T	p.Arg85Cys	missense_variant	Exon 1 of 4	ENST00000288840.10	NP_005576.3	O43541-1
SMAD6	NR_027654.2 link	n.1276C>T		non_coding_transcript_exon_variant	Exon 1 of 5
SMAD6	XR_931827.3 link	n.1276C>T		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.253C>T	p.Arg85Cys	missense_variant	Exon 1 of 4	1	NM_005585.5	ENSP00000288840.5	O43541-1
SMAD6	ENST00000557916.5 link	n.253C>T		non_coding_transcript_exon_variant	Exon 1 of 5	1		ENSP00000452955.1	O43541-4
SMAD6	ENST00000612349.1 link	n.435C>T		non_coding_transcript_exon_variant	Exon 1 of 1	6

Frequencies

GnomAD3 genomes

AF:

0.000112

AC:

AN:

151234

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000969

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000289

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000177

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.0000840

AC:

AN:

1071934

Hom.:

Cov.:

AF XY:

0.0000927

AC XY:

AN XY:

507134

show subpopulations

African (AFR)

AF:

0.0000452

AC:

AN:

22148

American (AMR)

AF:

0.00

AC:

AN:

7788

Ashkenazi Jewish (ASJ)

AF:

0.0000747

AC:

AN:

13390

East Asian (EAS)

AF:

0.00

AC:

AN:

24912

South Asian (SAS)

AF:

0.00

AC:

AN:

19538

European-Finnish (FIN)

AF:

0.00

AC:

AN:

27206

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2810

European-Non Finnish (NFE)

AF:

0.0000943

AC:

AN:

911774

Other (OTH)

AF:

0.0000472

AC:

AN:

42368

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.495

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:

0.000112

AC:

AN:

151234

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

73838

show subpopulations

African (AFR)

AF:

0.0000969

AC:

AN:

41298

American (AMR)

AF:

0.00

AC:

AN:

15200

Ashkenazi Jewish (ASJ)

AF:

0.000289

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5134

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10286

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.000177

AC:

AN:

67722

Other (OTH)

AF:

0.00

AC:

AN:

2072

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.560

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:

0.000285

Hom.:

Bravo

AF:

0.000136

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Aortic valve disease 2

Uncertain:1

Dec 08, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 85 of the SMAD6 protein (p.Arg85Cys). This variant is present in population databases (no rsID available, gnomAD 0.02%). This missense change has been observed in individual(s) with craniosynostosis (PMID: 32499606). ClinVar contains an entry for this variant (Variation ID: 471755). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.40

BayesDel_addAF

Benign

-0.030

BayesDel_noAF

Benign

-0.28

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.31

Eigen

Benign

-0.018

Eigen_PC

Benign

-0.026

FATHMM_MKL

Benign

0.70

LIST_S2

Benign

0.71

M_CAP

Pathogenic

0.80

MetaRNN

Benign

0.32

MetaSVM

Benign

-0.79

MutationAssessor

Benign

1.1

PhyloP100

-0.051

PrimateAI

Pathogenic

0.97

PROVEAN

Benign

-0.48

REVEL

Benign

0.24

Sift

Benign

0.084

Sift4G

Benign

0.078

Polyphen

1.0

Vest4

0.25

MutPred

0.36

Loss of methylation at R85 (P = 0.0157);

MVP

0.82

MPC

2.0

ClinPred

0.57

GERP RS

3.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

Varity_R

0.10

gMVP

0.47

Mutation Taster

=84/16

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over