15-67142737-G-T

Variant names:

• chr15-67142737-G-T
• rs745103
• NM_005902.4:c.207-22158G>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_005902.4(SMAD3):​c.207-22158G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000658 in 151,926 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: SMAD3 NM_005902.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.592
• Publications: 34 publications found

Genes affected

SMAD3 (HGNC:6769): (SMAD family member 3) The SMAD family of proteins are a group of intracellular signal transducer proteins similar to the gene products of the Drosophila gene 'mothers against decapentaplegic' (Mad) and the C. elegans gene Sma. The SMAD3 protein functions in the transforming growth factor-beta signaling pathway, and transmits signals from the cell surface to the nucleus, regulating gene activity and cell proliferation. This protein forms a complex with other SMAD proteins and binds DNA, functioning both as a transcription factor and tumor suppressor. Mutations in this gene are associated with aneurysms-osteoarthritis syndrome and Loeys-Dietz Syndrome 3. [provided by RefSeq, May 2022]

SMAD3-AS1 (HGNC:56692): (SMAD3 antisense RNA 1)

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMAD3	NM_005902.4	c.207-22158G>T		intron_variant	Intron 1 of 8	ENST00000327367.9	NP_005893.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMAD3	ENST00000327367.9	c.207-22158G>T		intron_variant	Intron 1 of 8	1	NM_005902.4	ENSP00000332973.4

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 151926 Hom.: 0 Cov.: 32

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 200342 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 112844

African (AFR) AF: 0.00 AC: 0 AN: 4572

American (AMR) AF: 0.00 AC: 0 AN: 14404

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 6292

East Asian (EAS) AF: 0.00 AC: 0 AN: 5364

South Asian (SAS) AF: 0.00 AC: 0 AN: 44750

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 9884

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2246

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 103308

Other (OTH) AF: 0.00 AC: 0 AN: 9522

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 151926 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74204

African (AFR) AF: 0.00 AC: 0 AN: 41310

American (AMR) AF: 0.00 AC: 0 AN: 15280

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5180

South Asian (SAS) AF: 0.00 AC: 0 AN: 4818

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10560

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 67992

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.00 Hom.: 39218

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	0.31
DANN	Benign	0.51
PhyloP100		-0.59

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: rs745103; hg19: chr15-67435075;