Genetic Variant SMTN:p.Arg29His (chr22-31087999-G-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_134269.3(SMTN):c.86G>A(p.Arg29His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000492 in 1,607,200 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000052 ( 0 hom. )

Consequence

SMTN
NM_134269.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.61

Variant links:

Genes affected

SMTN (HGNC:11126): (smoothelin) This gene encodes a structural protein that is found exclusively in contractile smooth muscle cells. It associates with stress fibers and constitutes part of the cytoskeleton. This gene is localized to chromosome 22q12.3, distal to the TUPLE1 locus and outside the DiGeorge syndrome deletion. Alternative splicing of this gene results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, May 2011]

SMTN links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.11060697).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMTN	NM_134269.3 link	c.86G>A	p.Arg29His	missense_variant	Exon 3 of 21	ENST00000333137.12	NP_599031.1	P53814-5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMTN	ENST00000333137.12 link	c.86G>A	p.Arg29His	missense_variant	Exon 3 of 21	1	NM_134269.3	ENSP00000329532.7		P53814-5

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152248

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:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000325

AC:

AN:

246268

Hom.:

AF XY:

0.0000298

AC XY:

AN XY:

134012

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000550

Gnomad SAS exome

AF:

0.0000328

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000542

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000515

AC:

AN:

1454952

Hom.:

Cov.:

AF XY:

0.0000443

AC XY:

AN XY:

722602

show subpopulations

Gnomad4 AFR exome

AF:

0.0000300

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000759

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.0000190

Gnomad4 NFE exome

AF:

0.0000578

Gnomad4 OTH exome

AF:

0.0000667

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152248

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74376

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000192

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000517

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000165

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.24

BayesDel_noAF

Benign

-0.41

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.072

.;T;.;.;.;T;.;.;.;T;T

Eigen

Benign

-0.21

Eigen_PC

Benign

-0.052

FATHMM_MKL

Uncertain

0.86

LIST_S2

Uncertain

0.90

D;D;D;D;D;D;D;D;D;D;D

M_CAP

Benign

0.023

MetaRNN

Benign

0.11

T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.69

.;.;.;.;N;N;N;.;.;.;.

PrimateAI

Uncertain

0.65

PROVEAN

Uncertain

-4.2

D;D;D;D;N;N;N;.;.;.;D

REVEL

Benign

0.064

Sift

Benign

0.043

D;T;D;D;D;D;D;.;.;.;D

Sift4G

Pathogenic

0.0

D;D;D;D;D;D;T;D;D;D;D

Polyphen

0.047, 0.038

.;.;.;.;.;B;B;.;.;.;.

Vest4

0.34, 0.29, 0.31, 0.34, 0.32

MutPred

0.17

.;Loss of MoRF binding (P = 0.0926);.;.;Loss of MoRF binding (P = 0.0926);Loss of MoRF binding (P = 0.0926);Loss of MoRF binding (P = 0.0926);Loss of MoRF binding (P = 0.0926);.;.;.;

MVP

0.29

MPC

0.53

ClinPred

0.31

GERP RS

3.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.080

gMVP

0.26

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

Computational scores

Splicing

Publications

LitVar

Other links and lift over