dbSNP rs894651844: SMCO2:p.Leu218Val (chr12-27494351-C-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_001395208.2(SMCO2):c.652C>G(p.Leu218Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000125 in 1,522,724 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000011 ( 0 hom. )

Consequence

SMCO2
NM_001395208.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.798

Variant links:

Genes affected

SMCO2 (HGNC:34448): (single-pass membrane protein with coiled-coil domains 2) Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

SMCO2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SMCO2	NM_001395208.2 link	c.652C>G	p.Leu218Val	missense_variant	Exon 7 of 9	ENST00000535986.2	NP_001382137.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMCO2	ENST00000535986.2 link	c.652C>G	p.Leu218Val	missense_variant	Exon 7 of 9	5	NM_001395208.2	ENSP00000441688.1		A6NFE2

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

151874

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

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

GnomAD3 exomes

AF:

0.0000834

AC:

AN:

131934

Hom.:

AF XY:

0.0000428

AC XY:

AN XY:

70126

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000612

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000109

AC:

AN:

1370850

Hom.:

Cov.:

AF XY:

0.00000592

AC XY:

AN XY:

675740

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000499

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000263

AC:

AN:

151874

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74212

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000453

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 18, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.652C>G (p.L218V) alteration is located in exon 7 (coding exon 6) of the SMCO2 gene. This alteration results from a C to G substitution at nucleotide position 652, causing the leucine (L) at amino acid position 218 to be replaced by a valine (V). 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

0.12

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.55

CADD

Benign

DANN

Benign

0.85

DEOGEN2

Benign

0.0095

T;T;T

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.0094

LIST_S2

Benign

0.33

T;T;.

M_CAP

Benign

0.0017

MetaRNN

Benign

0.029

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.34

.;N;N

PrimateAI

Benign

0.39

PROVEAN

Benign

0.31

N;N;N

REVEL

Benign

0.013

Sift

Benign

0.25

T;T;T

Sift4G

Uncertain

0.047

D;D;D

Polyphen

0.0030

.;B;B

Vest4

0.21

MutPred

0.24

.;Gain of methylation at K223 (P = 0.0763);Gain of methylation at K223 (P = 0.0763);

MVP

0.014

ClinPred

0.025

GERP RS

0.82

Varity_R

0.044

gMVP

0.018

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.25

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.25

Position offset: 5

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

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over