rs1397296874

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_005585.5(SMAD6):c.358G>A(p.Asp120Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000406 in 1,230,058 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 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. D120H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000037 ( 0 hom. )

Consequence

SMAD6
NM_005585.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.75

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.26928172).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
SMAD6	NM_005585.5 linkuse as main transcript	c.358G>A	p.Asp120Asn	missense_variant	1/4	ENST00000288840.10
SMAD6	NR_027654.2 linkuse as main transcript	n.1381G>A		non_coding_transcript_exon_variant	1/5
SMAD6	XR_931827.3 linkuse as main transcript	n.1381G>A		non_coding_transcript_exon_variant	1/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SMAD6	ENST00000288840.10 linkuse as main transcript	c.358G>A	p.Asp120Asn	missense_variant	1/4	1	NM_005585.5	P1	O43541-1
SMAD6	ENST00000557916.5 linkuse as main transcript	c.358G>A	p.Asp120Asn	missense_variant, NMD_transcript_variant	1/5	1			O43541-4
SMAD6	ENST00000612349.1 linkuse as main transcript	n.540G>A		non_coding_transcript_exon_variant	1/1

Frequencies

GnomAD3 genomes

AF:

0.00000662

AC:

AN:

151008

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000148

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000371

AC:

AN:

1079050

Hom.:

Cov.:

AF XY:

0.00000585

AC XY:

AN XY:

512696

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000327

Gnomad4 OTH exome

AF:

0.0000236

GnomAD4 genome

AF:

0.00000662

AC:

AN:

151008

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

73742

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000148

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Aortic valve disease 2

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

May 18, 2022

This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 120 of the SMAD6 protein (p.Asp120Asn). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with SMAD6-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). 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

Benign

0.14

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Benign

-0.48

Cadd

Pathogenic

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.48

Eigen

Benign

0.10

Eigen_PC

Benign

0.081

FATHMM_MKL

Benign

0.45

LIST_S2

Benign

0.70

M_CAP

Pathogenic

0.82

MetaRNN

Benign

0.27

MetaSVM

Benign

-0.53

MutationAssessor

Benign

1.6

MutationTaster

Benign

0.85

D;D

PrimateAI

Pathogenic

0.97

PROVEAN

Benign

-0.36

REVEL

Benign

0.27

Sift

Uncertain

0.0040

Sift4G

Uncertain

0.034

Polyphen

0.97

Vest4

0.12

MutPred

0.10

Loss of phosphorylation at S119 (P = 0.1228);

MVP

0.75

MPC

1.9

ClinPred

0.84

GERP RS

2.9

Varity_R

0.12

gMVP

0.38

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over