Genetic Variant SGMS1:p.Arg302Gln (chr10-50308139-C-T) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4BS2

The NM_147156.4(SGMS1):c.905G>A(p.Arg302Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000329 in 1,460,648 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000033 ( 1 hom. )

Consequence

SGMS1
NM_147156.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.24

Variant links:

Genes affected

SGMS1 (HGNC:29799): (sphingomyelin synthase 1) The protein encoded by this gene is predicted to be a five-pass transmembrane protein. This gene may be predominately expressed in brain. [provided by RefSeq, Jul 2008]

SGMS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.34099704).

BS2

High AC in GnomAdExome4 at 48 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SGMS1	NM_147156.4 link	c.905G>A	p.Arg302Gln	missense_variant	Exon 10 of 11	ENST00000361781.7	NP_671512.1	Q86VZ5-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SGMS1	ENST00000361781.7 link	c.905G>A	p.Arg302Gln	missense_variant	Exon 10 of 11	1	NM_147156.4	ENSP00000354829.2		Q86VZ5-1
SGMS1	ENST00000429490 link	c.*127G>A		3_prime_UTR_variant	Exon 9 of 10	5		ENSP00000406795.2		E6ZCI6

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000241

AC:

AN:

249294

Hom.:

AF XY:

0.0000445

AC XY:

AN XY:

134824

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000545

Gnomad SAS exome

AF:

0.000164

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000329

AC:

AN:

1460648

Hom.:

Cov.:

AF XY:

0.0000440

AC XY:

AN XY:

726558

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.000302

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000171

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000225

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 17, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.905G>A (p.R302Q) alteration is located in exon 10 (coding exon 4) of the SGMS1 gene. This alteration results from a G to A substitution at nucleotide position 905, causing the arginine (R) at amino acid position 302 to be replaced by a glutamine (Q). 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

0.10

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.25

CADD

Pathogenic

DANN

Pathogenic

1.0

Eigen

Uncertain

0.44

Eigen_PC

Uncertain

0.46

FATHMM_MKL

Uncertain

0.87

LIST_S2

Uncertain

0.94

M_CAP

Benign

0.039

MetaRNN

Benign

0.34

MetaSVM

Uncertain

0.037

PrimateAI

Uncertain

0.72

PROVEAN

Uncertain

-2.5

REVEL

Benign

0.26

Sift

Uncertain

0.0060

Sift4G

Uncertain

0.048

Vest4

0.40

MVP

0.52

MPC

1.8

ClinPred

0.62

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.28

gMVP

0.86

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

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