15-66719642-C-T

Variant names:

• chr15-66719642-C-T
• rs2119261
• NM_005585.5:c.952+3144C>T

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_Moderate BA1

The NM_005585.5(SMAD6):​c.952+3144C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.428 in 152,068 control chromosomes in the GnomAD database, including 14,567 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.43 (14567 hom., cov: 32)
• Consequence: SMAD6 NM_005585.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.67
• Publications: 14 publications found

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

ACMG classification

Our verdict: Benign. The variant received -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.25).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.538 is higher than 0.05.

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SMAD6	NM_005585.5	MANE Select	c.952+3144C>T		intron	N/A	NP_005576.3
	SMAD6	NR_027654.2		n.2107+2502C>T		intron	N/A

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SMAD6	ENST00000288840.10	TSL:1 MANE Select	c.952+3144C>T		intron	N/A	ENSP00000288840.5
	SMAD6	ENST00000557916.5	TSL:1	n.*67+2502C>T		intron	N/A	ENSP00000452955.1
	SMAD6	ENST00000559931.5	TSL:3	n.*67+2502C>T		intron	N/A	ENSP00000453446.1

Frequencies

GnomAD3 genomes AF: 0.428 AC: 65070 AN: 151950 Hom.: 14538 Cov.: 32

Gnomad AFR AF: 0.544

Gnomad AMI AF: 0.381

Gnomad AMR AF: 0.523

Gnomad ASJ AF: 0.313

Gnomad EAS AF: 0.434

Gnomad SAS AF: 0.467

Gnomad FIN AF: 0.372

Gnomad MID AF: 0.373

Gnomad NFE AF: 0.349

Gnomad OTH AF: 0.443

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.428 AC: 65152 AN: 152068 Hom.: 14567 Cov.: 32 AF XY: 0.433 AC XY: 32153 AN XY: 74330

African (AFR) AF: 0.543 AC: 22535 AN: 41466

American (AMR) AF: 0.523 AC: 8007 AN: 15296

Ashkenazi Jewish (ASJ) AF: 0.313 AC: 1086 AN: 3468

East Asian (EAS) AF: 0.434 AC: 2244 AN: 5168

South Asian (SAS) AF: 0.466 AC: 2245 AN: 4816

European-Finnish (FIN) AF: 0.372 AC: 3938 AN: 10572

Middle Eastern (MID) AF: 0.384 AC: 113 AN: 294

European-Non Finnish (NFE) AF: 0.349 AC: 23698 AN: 67968

Other (OTH) AF: 0.445 AC: 939 AN: 2110

Alfa AF: 0.375 Hom.: 17984

Bravo AF: 0.442

Asia WGS AF: 0.433 AC: 1509 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.25
CADD	Benign	11
DANN	Benign	0.92
PhyloP100		1.7
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs2119261; hg19: chr15-67011980; COSMIC: COSV56597981; COSMIC: COSV56597981;