4-145539950-C-G

Variant names:

• chr4-145539950-C-G
• rs1229406859
• NM_005900.3:c.547C>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005900.3(SMAD1):​c.547C>G​(p.Pro183Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,758 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. P183L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: SMAD1 NM_005900.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.16
• Publications: 0 publications found

Genes affected

SMAD1 (HGNC:6767): (SMAD family member 1) The protein encoded by this gene belongs to the SMAD, a family of proteins similar to the gene products of the Drosophila gene 'mothers against decapentaplegic' (Mad) and the C. elegans gene Sma. SMAD proteins are signal transducers and transcriptional modulators that mediate multiple signaling pathways. This protein mediates the signals of the bone morphogenetic proteins (BMPs), which are involved in a range of biological activities including cell growth, apoptosis, morphogenesis, development and immune responses. In response to BMP ligands, this protein can be phosphorylated and activated by the BMP receptor kinase. The phosphorylated form of this protein forms a complex with SMAD4, which is important for its function in the transcription regulation. This protein is a target for SMAD-specific E3 ubiquitin ligases, such as SMURF1 and SMURF2, and undergoes ubiquitination and proteasome-mediated degradation. Alternatively spliced transcript variants encoding the same protein have been observed. [provided by RefSeq, Jul 2008]

SMAD1 Gene-Disease associations (from GenCC):

• congenital heart disease

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• pulmonary arterial hypertension

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen, PanelApp Australia

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.14744559).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005900.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SMAD1	NM_005900.3	MANE Select	c.547C>G	p.Pro183Ala	missense	Exon 3 of 7	NP_005891.1	Q15797-1
	SMAD1	NM_001003688.1		c.547C>G	p.Pro183Ala	missense	Exon 3 of 7	NP_001003688.1	Q15797-1
	SMAD1	NM_001354811.1		c.547C>G	p.Pro183Ala	missense	Exon 3 of 7	NP_001341740.1	Q15797-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SMAD1	ENST00000302085.9	TSL:1 MANE Select	c.547C>G	p.Pro183Ala	missense	Exon 3 of 7	ENSP00000305769.4	Q15797-1
	SMAD1	ENST00000394092.6	TSL:1	c.547C>G	p.Pro183Ala	missense	Exon 3 of 7	ENSP00000377652.2	Q15797-1
	SMAD1	ENST00000515385.1	TSL:2	c.547C>G	p.Pro183Ala	missense	Exon 3 of 7	ENSP00000426568.1	Q15797-1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461758 Hom.: 0 Cov.: 32 AF XY: 0.00000413 AC XY: 3 AN XY: 727160

African (AFR) AF: 0.00 AC: 0 AN: 33474

American (AMR) AF: 0.00 AC: 0 AN: 44678

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.00 AC: 0 AN: 86250

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53400

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1111972

Other (OTH) AF: 0.00 AC: 0 AN: 60386

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.059
BayesDel_addAF	Pathogenic	0.16	D
BayesDel_noAF	Uncertain	0.0
CADD	Benign	20
DANN	Benign	0.90
DEOGEN2	Benign	0.39	T
Eigen	Benign	-0.12
Eigen_PC	Benign	0.12
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Benign	0.81	T
M_CAP	Uncertain	0.089	D
MetaRNN	Benign	0.15	T
MetaSVM	Uncertain	0.21	D
MutationAssessor	Benign	1.7	L
PhyloP100		3.2
PrimateAI	Uncertain	0.50	T
PROVEAN	Benign	0.83	N
REVEL	Uncertain	0.44
Sift	Benign	1.0	T
Sift4G	Benign	0.62	T
Polyphen		0.0010	B
Vest4		0.27
MutPred		0.13		Loss of glycosylation at P183 (P = 0.0516)
MVP		0.66
MPC		0.10
ClinPred		0.66	D
GERP RS		6.0
Varity_R		0.068
gMVP		0.37
Mutation Taster		=72/28	polymorphism

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

Other links and lift over

dbSNP: rs1229406859; hg19: chr4-146461102;