Variant 17-2363120-C-T details in Genebe, Genetics Data Aggregator

Variant summary

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

The NM_014853.3(SGSM2):c.658C>T(p.Arg220Cys) variant causes a missense change. The variant allele was found at a frequency of 0.00000481 in 1,453,800 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000048 ( 0 hom. )

Consequence

SGSM2
NM_014853.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.01

Variant links:

Genes affected

SGSM2 (HGNC:29026): (small G protein signaling modulator 2) The protein encoded by this gene is a GTPase activator with activity towards RAB32 and RAB33B, which are regulators of membrane trafficking. The encoded protein inactivates RAB32 and can bind RAB9A-GTP, a protein required for RAB32 activation. [provided by RefSeq, Oct 2016]

SGSM2 links:

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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/exons	MANE	Protein	UniProt
SGSM2	NM_014853.3 linkuse as main transcript	c.658C>T	p.Arg220Cys	missense_variant	6/24	ENST00000268989.8	NP_055668.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SGSM2	ENST00000268989.8 linkuse as main transcript	c.658C>T	p.Arg220Cys	missense_variant	6/24	1	NM_014853.3	ENSP00000268989	P4	O43147-2
SGSM2	ENST00000426855.6 linkuse as main transcript	c.658C>T	p.Arg220Cys	missense_variant	6/23	1		ENSP00000415107	A1	O43147-1
SGSM2	ENST00000574563.5 linkuse as main transcript	c.658C>T	p.Arg220Cys	missense_variant	6/23	2		ENSP00000459126		O43147-5
SGSM2	ENST00000573062.5 linkuse as main transcript	c.741C>T	p.Ser247=	synonymous_variant, NMD_transcript_variant	5/9	2		ENSP00000476800

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000481

AC:

AN:

1453800

Hom.:

Cov.:

AF XY:

0.00000277

AC XY:

AN XY:

722842

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000117

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000541

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000825

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 20, 2023

The c.658C>T (p.R220C) alteration is located in exon 6 (coding exon 6) of the SGSM2 gene. This alteration results from a C to T substitution at nucleotide position 658, causing the arginine (R) at amino acid position 220 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

Benign

0.31

BayesDel_addAF

Pathogenic

0.23

BayesDel_noAF

Uncertain

0.090

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.38

.;T;.

Eigen

Pathogenic

0.75

Eigen_PC

Pathogenic

0.68

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

1.0

D;D;D

M_CAP

Benign

0.053

MetaRNN

Uncertain

0.58

D;D;D

MetaSVM

Benign

-0.93

MutationAssessor

Uncertain

2.7

M;M;M

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.69

PROVEAN

Pathogenic

-6.3

D;D;.

REVEL

Uncertain

0.34

Sift

Uncertain

0.0010

D;D;.

Sift4G

Pathogenic

0.0010

D;D;D

Polyphen

1.0

D;D;D

Vest4

0.67

MutPred

0.33

Loss of MoRF binding (P = 0.0028);Loss of MoRF binding (P = 0.0028);Loss of MoRF binding (P = 0.0028);

MVP

0.47

MPC

0.68

ClinPred

0.99

GERP RS

6.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.48

gMVP

0.48

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