rs62636580

Variant names:

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1

The NM_000171.4(GLRA1):c.1224C>T(p.Phe408Phe) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0044 in 1,614,090 control chromosomes in the GnomAD database, including 272 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.023 ( 137 hom., cov: 31)

Exomes 𝑓: 0.0024 ( 135 hom. )

Consequence

GLRA1
NM_000171.4 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 3.52

Publications

2 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 -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.54).

BP6

Variant 5-151822799-G-A is Benign according to our data. Variant chr5-151822799-G-A is described in ClinVar as Benign. ClinVar VariationId is 352306.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=3.52 with no splicing effect.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0787 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GLRA1	NM_000171.4 link	c.1224C>T	p.Phe408Phe	synonymous_variant	Exon 9 of 9	ENST00000274576.9	NP_000162.2	P23415-2
GLRA1	NM_001146040.2 link	c.1248C>T	p.Phe416Phe	synonymous_variant	Exon 9 of 9		NP_001139512.1	P23415-1
GLRA1	NM_001292000.2 link	c.975C>T	p.Phe325Phe	synonymous_variant	Exon 8 of 8		NP_001278929.1	Q14C71
GLRA1	XM_047417105.1 link	c.1272C>T	p.Phe424Phe	synonymous_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.1224C>T	p.Phe408Phe	synonymous_variant	Exon 9 of 9	1	NM_000171.4	ENSP00000274576.5	P23415-2
GLRA1	ENST00000455880.2 link	c.1248C>T	p.Phe416Phe	synonymous_variant	Exon 9 of 9	1		ENSP00000411593.2	P23415-1
GLRA1	ENST00000462581.6 link	n.*982C>T		non_coding_transcript_exon_variant	Exon 8 of 8	1		ENSP00000430595.1	E5RJ70
GLRA1	ENST00000462581.6 link	n.*982C>T		3_prime_UTR_variant	Exon 8 of 8	1		ENSP00000430595.1	E5RJ70

Frequencies

GnomAD3 genomes

AF:

0.0232

AC:

3536

AN:

152152

Hom.:

135

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0808

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00890

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000621

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.0127

Gnomad NFE

AF:

0.000220

Gnomad OTH

AF:

0.0148

GnomAD2 exomes

AF:

0.00590

AC:

1484

AN:

251412

AF XY:

0.00411

show subpopulations

Gnomad AFR exome

AF:

0.0817

Gnomad AMR exome

AF:

0.00338

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000114

Gnomad OTH exome

AF:

0.00195

GnomAD4 exome

AF:

0.00243

AC:

3548

AN:

1461820

Hom.:

135

Cov.:

AF XY:

0.00209

AC XY:

1519

AN XY:

727218

show subpopulations

African (AFR)

AF:

0.0855

AC:

2861

AN:

33470

American (AMR)

AF:

0.00367

AC:

164

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.000325

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00381

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000138

AC:

153

AN:

1111956

Other (OTH)

AF:

0.00530

AC:

320

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

Heterozygous variant carriers

188

377

565

754

942

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

168

252

336

420

<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:

0.0233

AC:

3554

AN:

152270

Hom.:

137

Cov.:

AF XY:

0.0222

AC XY:

1655

AN XY:

74458

show subpopulations

African (AFR)

AF:

0.0810

AC:

3364

AN:

41548

American (AMR)

AF:

0.00896

AC:

137

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5166

South Asian (SAS)

AF:

0.000622

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.0136

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000220

AC:

AN:

68030

Other (OTH)

AF:

0.0147

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

171

342

513

684

855

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

102

136

170

<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:

0.0135

Hom.:

Bravo

AF:

0.0269

Asia WGS

AF:

0.00722

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.000237

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Hyperekplexia 1

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided

Benign:1

Sep 11, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Hereditary hyperekplexia

Benign:1

Feb 04, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.54

CADD

Benign

(source)

DANN

Benign

0.73

PhyloP100

3.5

Mutation Taster

=97/3

polymorphism (auto)

(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