rs1206043195

Variant names:

• chr19-43732904-T-C
• rs1206043195
• NM_019108.4:c.1438A>G

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_019108.4(SMG9):​c.1438A>G​(p.Met480Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000372 in 1,613,730 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: SMG9 NM_019108.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.47
• Publications: 0 publications found

Genes affected

SMG9 (HGNC:25763): (SMG9 nonsense mediated mRNA decay factor) This gene encodes a regulatory subunit of the SMG1 complex, which plays a critical role in nonsense-mediated mRNA decay (NMD). Binding of the encoded protein to the SMG1 complex kinase scaffold protein results in the inhibition of its kinase activity. Mutations in this gene cause a multiple congenital anomaly syndrome in human patients, characterized by brain malformation, congenital heart disease and other features. [provided by RefSeq, Jul 2016]

SMG9 Gene-Disease associations (from GenCC):

• heart and brain malformation syndrome

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.33633435).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_019108.4. 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
	SMG9	NM_019108.4	MANE Select	c.1438A>G	p.Met480Val	missense	Exon 13 of 14	NP_061981.2	Q9H0W8-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SMG9	ENST00000270066.11	TSL:1 MANE Select	c.1438A>G	p.Met480Val	missense	Exon 13 of 14	ENSP00000270066.6	Q9H0W8-1
	SMG9	ENST00000892518.1		c.1531A>G	p.Met511Val	missense	Exon 13 of 14	ENSP00000562577.1
	SMG9	ENST00000892519.1		c.1504A>G	p.Met502Val	missense	Exon 13 of 14	ENSP00000562578.1

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 151892 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000242

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461838 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 727210

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44714

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53392

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00000450 AC: 5 AN: 1112002

Other (OTH) AF: 0.00 AC: 0 AN: 60394

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 151892 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74162

African (AFR) AF: 0.0000242 AC: 1 AN: 41350

American (AMR) AF: 0.00 AC: 0 AN: 15248

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5160

South Asian (SAS) AF: 0.00 AC: 0 AN: 4804

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10568

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67978

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

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.0000113

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.19
BayesDel_addAF	Pathogenic	0.30	D
BayesDel_noAF	Pathogenic	0.19
CADD	Benign	21
DANN	Benign	0.96
DEOGEN2	Benign	0.041	T
Eigen	Benign	0.0045
Eigen_PC	Benign	0.19
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Benign	0.82	T
M_CAP	Benign	0.0047	T
MetaRNN	Benign	0.34	T
MetaSVM	Benign	-0.90	T
MutationAssessor	Benign	1.7	L
PhyloP100		5.5
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-1.2	N
REVEL	Benign	0.18
Sift	Benign	0.42	T
Sift4G	Benign	0.39	T
Polyphen		0.043	B
Vest4		0.78
MutPred		0.26		Loss of helix (P = 0.0558)
MVP		0.41
MPC		0.46
ClinPred		0.59	D
GERP RS		5.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.42
gMVP		0.60
Mutation Taster		=57/43	polymorphism

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

Other links and lift over

dbSNP: rs1206043195; hg19: chr19-44237056;