11-57542739-G-A

Position:

• chr11-57542739-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001105565.3(SMTNL1):​c.97G>A​(p.Glu33Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: SMTNL1 NM_001105565.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.54

Genes affected

SMTNL1 (HGNC:32394): (smoothelin like 1) The protein encoded by this gene is involved in the contraction of both striated and smooth muscle. During pregnancy, the encoded protein interacts with progesterone receptor to attenuate the expression of contractile and metabolic proteins. [provided by RefSeq, Jul 2016]

ACMG classification

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=0.08798903).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SMTNL1	NM_001105565.3	c.97G>A	p.Glu33Lys	missense_variant	2/8	ENST00000527972.6	NP_001099035.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SMTNL1	ENST00000527972.6	c.97G>A	p.Glu33Lys	missense_variant	2/8	5	NM_001105565.3	ENSP00000432651.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 11, 2023

The c.97G>A (p.E33K) alteration is located in exon 1 (coding exon 1) of the SMTNL1 gene. This alteration results from a G to A substitution at nucleotide position 97, causing the glutamic acid (E) at amino acid position 33 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.079
BayesDel_addAF	Benign	-0.038	T
BayesDel_noAF	Benign	-0.29
CADD	Benign	17
DANN	Uncertain	0.99
DEOGEN2	Benign	0.019	T;T
Eigen	Benign	-0.92
Eigen_PC	Benign	-0.92
FATHMM_MKL	Benign	0.40	N
LIST_S2	Benign	0.55	T;T
M_CAP	Benign	0.049	D
MetaRNN	Benign	0.088	T;T
MetaSVM	Benign	-0.33	T
MutationAssessor	Benign	1.4	.;L
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-0.89	N;N
REVEL	Benign	0.24
Sift	Uncertain	0.0040	D;D
Sift4G	Benign	0.18	T;T
Vest4		0.17
MVP		0.22
ClinPred		0.48	T
GERP RS		1.0
Varity_R		0.077
gMVP		0.11

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

Other links and lift over

dbSNP: rs1944889173; hg19: chr11-57310212;