dbSNP rs1050028851: GLRA1:p.Lys439Glu (chr5-151822708-T-C) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_000171.4(GLRA1):c.1315A>G(p.Lys439Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K439Q) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 31)

Consequence

GLRA1
NM_000171.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.83

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:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.864

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GLRA1	NM_000171.4 link	c.1315A>G	p.Lys439Glu	missense_variant	Exon 9 of 9	ENST00000274576.9	NP_000162.2	P23415-2
GLRA1	NM_001146040.2 link	c.1339A>G	p.Lys447Glu	missense_variant	Exon 9 of 9		NP_001139512.1	P23415-1
GLRA1	NM_001292000.2 link	c.1066A>G	p.Lys356Glu	missense_variant	Exon 8 of 8		NP_001278929.1	Q14C71
GLRA1	XM_047417105.1 link	c.1363A>G	p.Lys455Glu	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.1315A>G	p.Lys439Glu	missense_variant	Exon 9 of 9	1	NM_000171.4	ENSP00000274576.5	P23415-2
GLRA1	ENST00000455880.2 link	c.1339A>G	p.Lys447Glu	missense_variant	Exon 9 of 9	1		ENSP00000411593.2	P23415-1
GLRA1	ENST00000462581.6 link	n.*1073A>G		non_coding_transcript_exon_variant	Exon 8 of 8	1		ENSP00000430595.1	E5RJ70
GLRA1	ENST00000462581.6 link	n.*1073A>G		3_prime_UTR_variant	Exon 8 of 8	1		ENSP00000430595.1	E5RJ70

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.66

BayesDel_addAF

Pathogenic

0.40

BayesDel_noAF

Pathogenic

0.33

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

Eigen

Pathogenic

0.78

Eigen_PC

Pathogenic

0.73

FATHMM_MKL

Uncertain

0.93

LIST_S2

Pathogenic

0.99

D;D

M_CAP

Uncertain

0.21

MetaRNN

Pathogenic

0.86

D;D

MetaSVM

Uncertain

0.57

MutationAssessor

Uncertain

2.6

.;M

PhyloP100

7.8

PrimateAI

Uncertain

0.72

PROVEAN

Benign

-1.9

N;N

REVEL

Pathogenic

0.81

Sift

Uncertain

0.0050

D;D

Sift4G

Benign

0.11

T;T

Polyphen

1.0

D;D

Vest4

0.90

MutPred

0.50

.;Loss of methylation at K447 (P = 2e-04);

MVP

0.93

MPC

0.37

ClinPred

0.97

GERP RS

5.0

Varity_R

0.59

gMVP

0.84

Mutation Taster

=8/92

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over