chr5-151822857-T-G

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_000171.4(GLRA1):c.1166A>C(p.Asn389Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000128 in 1,614,078 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00064 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000074 ( 0 hom. )

Consequence

GLRA1
NM_000171.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:3

Conservation

PhyloP100: 0.112

Publications

0 publications found

Variant links:

Genes affected

GLRA1 (HGNC:4326): (glycine receptor alpha 1) The protein encoded by this gene is a subunit of a pentameric inhibitory glycine receptor, which mediates postsynaptic inhibition in the central nervous system. Defects in this gene are a cause of startle disease (STHE), also known as hereditary hyperekplexia or congenital stiff-person syndrome. Multiple transcript variants encoding different isoforms have been found. [provided by RefSeq, Dec 2015]

GLRA1 Gene-Disease associations (from GenCC):

hyperekplexia 1
Inheritance: AR, AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
hereditary hyperekplexia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

GLRA1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.010035008).

BP6

Variant 5-151822857-T-G is Benign according to our data. Variant chr5-151822857-T-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 577509.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000644 (98/152272) while in subpopulation AFR AF = 0.00214 (89/41552). AF 95% confidence interval is 0.00178. There are 0 homozygotes in GnomAd4. There are 40 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GLRA1	NM_000171.4 link	c.1166A>C	p.Asn389Thr	missense_variant	Exon 9 of 9	ENST00000274576.9	NP_000162.2	P23415-2
GLRA1	NM_001146040.2 link	c.1190A>C	p.Asn397Thr	missense_variant	Exon 9 of 9		NP_001139512.1	P23415-1
GLRA1	NM_001292000.2 link	c.917A>C	p.Asn306Thr	missense_variant	Exon 8 of 8		NP_001278929.1	Q14C71
GLRA1	XM_047417105.1 link	c.1214A>C	p.Asn405Thr	missense_variant	Exon 9 of 9		XP_047273061.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
GLRA1	ENST00000274576.9 link	c.1166A>C	p.Asn389Thr	missense_variant	Exon 9 of 9	1	NM_000171.4	ENSP00000274576.5	P23415-2
GLRA1	ENST00000455880.2 link	c.1190A>C	p.Asn397Thr	missense_variant	Exon 9 of 9	1		ENSP00000411593.2	P23415-1
GLRA1	ENST00000462581.6 link	n.*924A>C		non_coding_transcript_exon_variant	Exon 8 of 8	1		ENSP00000430595.1	E5RJ70
GLRA1	ENST00000462581.6 link	n.*924A>C		3_prime_UTR_variant	Exon 8 of 8	1		ENSP00000430595.1	E5RJ70

Frequencies

GnomAD3 genomes

AF:

0.000644

AC:

AN:

152154

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00215

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00115

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000208

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000171

AC:

AN:

251336

AF XY:

0.000133

show subpopulations

Gnomad AFR exome

AF:

0.00178

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000794

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000352

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000739

AC:

108

AN:

1461806

Hom.:

Cov.:

AF XY:

0.0000715

AC XY:

AN XY:

727204

show subpopulations

African (AFR)

AF:

0.00188

AC:

AN:

33476

American (AMR)

AF:

0.00

AC:

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.000765

AC:

AN:

26130

East Asian (EAS)

AF:

0.0000504

AC:

AN:

39696

South Asian (SAS)

AF:

0.00

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.0000187

AC:

AN:

53400

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.0000135

AC:

AN:

1111974

Other (OTH)

AF:

0.000116

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.476

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000644

AC:

AN:

152272

Hom.:

Cov.:

AF XY:

0.000537

AC XY:

AN XY:

74452

show subpopulations

African (AFR)

AF:

0.00214

AC:

AN:

41552

American (AMR)

AF:

0.00

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00115

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5178

South Asian (SAS)

AF:

0.000208

AC:

AN:

4814

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68006

Other (OTH)

AF:

0.000473

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.527

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000349

Hom.:

Bravo

AF:

0.000688

ESP6500AA

AF:

0.00272

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000231

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Feb 14, 2023

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Hyperekplexia 1

Uncertain:1

Jul 30, 2021

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:research

- -

GLRA1-related disorder

Benign:1

Sep 19, 2024

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Hereditary hyperekplexia

Benign:1

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.059

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.44

CADD

Benign

0.0040

(source)

DANN

Benign

0.79

Eigen

Benign

-1.1

Eigen_PC

Benign

-0.99

FATHMM_MKL

Benign

0.42

LIST_S2

Benign

0.61

T;T

M_CAP

Benign

0.031

MetaRNN

Benign

0.010

T;T

MetaSVM

Benign

-0.98

MutationAssessor

Benign

0.42

.;N

PhyloP100

0.11

PrimateAI

Uncertain

0.50

PROVEAN

Benign

-0.13

N;N

REVEL

Benign

0.27

Sift

Benign

0.60

T;T

Sift4G

Benign

0.54

T;T

Polyphen

0.0

B;B

Vest4

0.15

MVP

0.59

MPC

0.050

ClinPred

0.0064

GERP RS

-3.4

Varity_R

0.046

gMVP

0.53

Mutation Taster

=47/53

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over