Genetic Variant GLRA2:p.Lys451Gln (chrX-14730477-A-C) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BP4_ModerateBP6_Moderate

The NM_002063.4(GLRA2):c.1351A>C(p.Lys451Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000501 in 1,198,045 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000028 ( 0 hom., 0 hem., cov: 21)

Exomes 𝑓: 0.0000028 ( 0 hom. 0 hem. )

Consequence

GLRA2
NM_002063.4 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 7.40

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:

FANCB (HGNC:3583): (FA complementation group B) This gene encodes a member of the Fanconi anemia complementation group B. This protein is assembled into a nucleoprotein complex that is involved in the repair of DNA lesions. Mutations in this gene can cause chromosome instability and VACTERL syndrome with hydrocephalus. [provided by RefSeq, Apr 2016]

FANCB links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.12946564).

BP6

Variant X-14730477-A-C is Benign according to our data. Variant chrX-14730477-A-C is described in ClinVar as [Likely_benign]. Clinvar id is 3520638.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GLRA2	NM_002063.4 link	c.1351A>C	p.Lys451Gln	missense_variant	Exon 9 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.1351A>C	p.Lys451Gln	missense_variant	Exon 9 of 9	1	NM_002063.4	ENSP00000218075.4		P23416-1

Frequencies

GnomAD3 genomes

AF:

0.0000276

AC:

AN:

108717

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

31003

show subpopulations

Gnomad AFR

AF:

0.000101

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000164

AC:

AN:

183235

Hom.:

AF XY:

0.00

AC XY:

AN XY:

67731

show subpopulations

Gnomad AFR exome

AF:

0.000228

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000275

AC:

AN:

1089328

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

355060

show subpopulations

Gnomad4 AFR exome

AF:

0.000114

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000276

AC:

AN:

108717

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

31003

show subpopulations

Gnomad4 AFR

AF:

0.000101

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:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000416

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Benign:1

Aug 12, 2024

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.067

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.34

CADD

Benign

DANN

Benign

0.24

DEOGEN2

Benign

0.29

.;T;.

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.77

T;T;T

M_CAP

Benign

0.037

MetaRNN

Benign

0.13

T;T;T

MetaSVM

Benign

-0.84

MutationAssessor

Benign

-0.30

.;N;N

PrimateAI

Uncertain

0.67

PROVEAN

Benign

-0.60

N;N;N

REVEL

Benign

0.26

Sift

Benign

0.86

T;T;T

Sift4G

Benign

0.67

T;T;T

Polyphen

0.010, 0.0040

.;B;B

Vest4

0.36

MVP

0.90

MPC

1.2

ClinPred

0.095

GERP RS

4.4

Varity_R

0.37

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