Variant 20-45221448-C-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_003008.3(SEMG2):c.59C>G(p.Ala20Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000154 in 1,614,036 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: 𝑓 0.00020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00015 ( 1 hom. )

Consequence

SEMG2
NM_003008.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.187

Variant links:

Genes affected

SEMG2 (HGNC:10743): (semenogelin 2) The secreted protein encoded by this gene is involved in the formation of a gel matrix that encases ejaculated spermatozoa. Proteolysis by the prostate-specific antigen (PSA) breaks down the gel matrix and allows the spermatozoa to move more freely. The encoded protein is found in lesser abundance than a similar semenogelin protein. An antibacterial activity has been found for a antimicrobial peptide isolated from this protein. The genes encoding these two semenogelin proteins are found in a cluster on chromosome 20. [provided by RefSeq, Jan 2015]

SEMG2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.11221236).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SEMG2	NM_003008.3 linkuse as main transcript	c.59C>G	p.Ala20Gly	missense_variant	1/3	ENST00000372769.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SEMG2	ENST00000372769.4 linkuse as main transcript	c.59C>G	p.Ala20Gly	missense_variant	1/3	1	NM_003008.3	P1

Frequencies

GnomAD3 genomes

AF:

0.000204

AC:

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.0000943

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000412

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000195

AC:

AN:

251432

Hom.:

AF XY:

0.000228

AC XY:

AN XY:

135896

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000198

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000719

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000211

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000149

AC:

218

AN:

1461842

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

127

AN XY:

727218

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.000191

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000580

Gnomad4 FIN exome

AF:

0.0000562

Gnomad4 NFE exome

AF:

0.000135

Gnomad4 OTH exome

AF:

0.000166

GnomAD4 genome

AF:

0.000204

AC:

AN:

152194

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74346

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.000288

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.0000943

Gnomad4 NFE

AF:

0.000412

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000326

Hom.:

Bravo

AF:

0.000113

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000272

AC:

EpiCase

AF:

0.000109

EpiControl

AF:

0.0000593

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 25, 2023

The c.59C>G (p.A20G) alteration is located in exon 1 (coding exon 1) of the SEMG2 gene. This alteration results from a C to G substitution at nucleotide position 59, causing the alanine (A) at amino acid position 20 to be replaced by a glycine (G). 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

0.46

BayesDel_addAF

Benign

-0.45

BayesDel_noAF

Benign

-0.52

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.0083

Eigen

Benign

-0.18

Eigen_PC

Benign

-0.46

FATHMM_MKL

Benign

0.015

LIST_S2

Benign

0.75

M_CAP

Benign

0.0016

MetaRNN

Benign

0.11

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.3

MutationTaster

Benign

1.0

PrimateAI

Benign

0.31

PROVEAN

Uncertain

-2.9

REVEL

Benign

0.088

Sift

Uncertain

0.0070

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.23

MVP

0.15

MPC

0.10

ClinPred

0.14

GERP RS

1.5

Varity_R

0.23

gMVP

0.028

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