Genetic Variant GLRA2:p.Val145Ile (chrX-14581345-G-A) – ACMG Classification: Likely_benign (-1 pts)

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BS2_Supporting

The NM_002063.4(GLRA2):c.433G>A(p.Val145Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000581 in 1,205,096 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 3 hemizygotes in GnomAD. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000089 ( 0 hom., 1 hem., cov: 22)

Exomes 𝑓: 0.0000055 ( 0 hom. 2 hem. )

Consequence

GLRA2
NM_002063.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.06

Variant links:

Genes affected

GLRA2 (HGNC:4327): (glycine receptor alpha 2) The glycine receptor consists of two subunits, alpha and beta, and acts as a pentamer. The protein encoded by this gene is an alpha subunit and can bind strychnine. Several transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Jan 2010]

GLRA2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

BS2

High Hemizygotes in GnomAdExome4 at 2 XL geneVariant has number of hemizygotes lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GLRA2	NM_002063.4 link	c.433G>A	p.Val145Ile	missense_variant	Exon 4 of 9	ENST00000218075.9	NP_002054.1	P23416-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GLRA2	ENST00000218075.9 link	c.433G>A	p.Val145Ile	missense_variant	Exon 4 of 9	1	NM_002063.4	ENSP00000218075.4		P23416-1

Frequencies

GnomAD3 genomes

AF:

0.00000894

AC:

AN:

111844

Hom.:

Cov.:

AF XY:

0.0000294

AC XY:

AN XY:

33990

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000188

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000546

AC:

AN:

183136

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

67712

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000123

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000549

AC:

AN:

1093252

Hom.:

Cov.:

AF XY:

0.00000557

AC XY:

AN XY:

358760

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000716

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000894

AC:

AN:

111844

Hom.:

Cov.:

AF XY:

0.0000294

AC XY:

AN XY:

33990

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.0000188

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000936

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Jul 19, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.433G>A (p.V145I) alteration is located in exon 4 (coding exon 4) of the GLRA2 gene. This alteration results from a G to A substitution at nucleotide position 433, causing the valine (V) at amino acid position 145 to be replaced by an isoleucine (I). 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

0.11

BayesDel_addAF

Benign

-0.051

BayesDel_noAF

Benign

-0.31

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.36

.;T;.;.

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.89

D;D;D;D

M_CAP

Pathogenic

0.41

MetaRNN

Uncertain

0.62

D;D;D;D

MetaSVM

Benign

-0.37

MutationAssessor

Benign

0.64

.;N;N;.

PrimateAI

Uncertain

0.78

PROVEAN

Benign

-0.33

N;N;N;N

REVEL

Uncertain

0.36

Sift

Benign

0.29

T;T;T;T

Sift4G

Benign

0.47

T;T;T;T

Polyphen

0.098, 0.016

.;B;B;.

Vest4

0.22

MutPred

0.72

.;Loss of sheet (P = 0.0817);Loss of sheet (P = 0.0817);.;

MVP

0.89

MPC

1.1

ClinPred

0.51

GERP RS

4.8

Varity_R

0.24

gMVP

0.52

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