Variant chr17-2376242-C-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_014853.3(SGSM2):c.2590C>G(p.Leu864Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,608 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

SGSM2
NM_014853.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.90

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:

SGSM2-AS1 (HGNC:56091): (SGSM2 antisense RNA 1)

SGSM2-AS1 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.866

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SGSM2	NM_014853.3 linkuse as main transcript	c.2590C>G	p.Leu864Val	missense_variant	19/24	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.2590C>G	p.Leu864Val	missense_variant	19/24	1	NM_014853.3	ENSP00000268989	P4	O43147-2
SGSM2	ENST00000426855.6 linkuse as main transcript	c.2455C>G	p.Leu819Val	missense_variant	18/23	1		ENSP00000415107	A1	O43147-1
SGSM2-AS1	ENST00000574290.1 linkuse as main transcript	n.401+371G>C		intron_variant, non_coding_transcript_variant		5
SGSM2	ENST00000574563.5 linkuse as main transcript	c.2455C>G	p.Leu819Val	missense_variant	18/23	2		ENSP00000459126		O43147-5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

251086

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135826

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000326

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:

0.00000274

AC:

AN:

1461608

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727100

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000756

ExAC

AF:

0.0000165

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

Mar 24, 2023

The c.2590C>G (p.L864V) alteration is located in exon 19 (coding exon 19) of the SGSM2 gene. This alteration results from a C to G substitution at nucleotide position 2590, causing the leucine (L) at amino acid position 864 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

Pathogenic

0.66

BayesDel_addAF

Benign

-0.070

BayesDel_noAF

Uncertain

-0.030

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.32

.;T;.

Eigen

Pathogenic

0.95

Eigen_PC

Pathogenic

0.87

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.97

D;D;D

M_CAP

Benign

0.056

MetaRNN

Pathogenic

0.87

D;D;D

MetaSVM

Uncertain

-0.070

MutationAssessor

Pathogenic

3.4

.;M;M

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.71

PROVEAN

Uncertain

-2.7

D;D;.

REVEL

Uncertain

0.54

Sift

Uncertain

0.0020

D;D;.

Sift4G

Uncertain

0.0030

D;D;D

Polyphen

1.0

D;D;D

Vest4

0.74

MutPred

0.77

.;Gain of catalytic residue at L819 (P = 0.0175);Gain of catalytic residue at L819 (P = 0.0175);

MVP

0.76

MPC

0.60

ClinPred

0.82

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.65

gMVP

0.77

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.30

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.30

Position offset: -1

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