Genetic Variant SMCO4:p.Arg54Cys (chr11-93479030-G-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_020179.3(SMCO4):c.160C>T(p.Arg54Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000423 in 1,609,204 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. R54H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000043 ( 0 hom. )

Consequence

SMCO4
NM_020179.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.56

Variant links:

Genes affected

SMCO4 (HGNC:24810): (single-pass membrane protein with coiled-coil domains 4) Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

SMCO4 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
SMCO4	NM_020179.3 link	c.160C>T	p.Arg54Cys	missense_variant	Exon 3 of 3	ENST00000298966.7	NP_064564.1	Q9NRQ5A0A024R3A3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SMCO4	ENST00000298966.7 link	c.160C>T	p.Arg54Cys	missense_variant	Exon 3 of 3	1	NM_020179.3	ENSP00000298966.2		Q9NRQ5

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152218

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000442

AC:

AN:

249052

Hom.:

AF XY:

0.0000445

AC XY:

AN XY:

134794

show subpopulations

Gnomad AFR exome

AF:

0.000247

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000545

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000443

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000426

AC:

AN:

1456868

Hom.:

Cov.:

AF XY:

0.0000400

AC XY:

AN XY:

724168

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000505

Gnomad4 SAS exome

AF:

0.0000697

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000451

Gnomad4 OTH exome

AF:

0.0000498

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152336

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74490

show subpopulations

Gnomad4 AFR

AF:

0.0000240

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000113

Hom.:

Bravo

AF:

0.0000378

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000576

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 24, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.160C>T (p.R54C) alteration is located in exon 3 (coding exon 1) of the SMCO4 gene. This alteration results from a C to T substitution at nucleotide position 160, causing the arginine (R) at amino acid position 54 to be replaced by a cysteine (C). 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

Uncertain

0.42

BayesDel_addAF

Pathogenic

0.22

BayesDel_noAF

Pathogenic

0.36

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Benign

0.32

T;T;T;T

Eigen

Uncertain

0.55

Eigen_PC

Uncertain

0.61

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.94

.;.;.;D

M_CAP

Benign

0.059

MetaRNN

Uncertain

0.68

D;D;D;D

MetaSVM

Benign

-0.60

PrimateAI

Uncertain

0.62

PROVEAN

Pathogenic

-6.6

D;D;D;.

REVEL

Uncertain

0.57

Sift

Uncertain

0.0010

D;D;D;.

Sift4G

Pathogenic

0.0010

D;D;D;D

Polyphen

1.0

D;D;D;D

Vest4

0.87

MVP

0.24

MPC

0.72

ClinPred

0.56

GERP RS

6.0

Varity_R

0.50

gMVP

0.94

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

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over