5-151859888-C-T

Position:

• chr5-151859888-C-T

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1 PM2 PP3_Strong PP5_Moderate

The NM_000171.4(GLRA1):​c.373G>A​(p.Asp125Asn) 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. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: GLRA1 NM_000171.4 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 7.70

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]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PM1: In a topological_domain Extracellular (size 221) in uniprot entity GLRA1_HUMAN there are 23 pathogenic changes around while only 5 benign (82%) in NM_000171.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.988
• PP5: Variant 5-151859888-C-T is Pathogenic according to our data. Variant chr5-151859888-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 377302.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GLRA1	NM_000171.4	c.373G>A	p.Asp125Asn	missense_variant	4/9	ENST00000274576.9
GLRA1	NM_001146040.2	c.373G>A	p.Asp125Asn	missense_variant	4/9
GLRA1	NM_001292000.2	c.124G>A	p.Asp42Asn	missense_variant	3/8
GLRA1	XM_047417105.1	c.421G>A	p.Asp141Asn	missense_variant	4/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GLRA1	ENST00000274576.9	c.373G>A	p.Asp125Asn	missense_variant	4/9	1	NM_000171.4	P4
GLRA1	ENST00000455880.2	c.373G>A	p.Asp125Asn	missense_variant	4/9	1		A1
GLRA1	ENST00000471351.2	n.656G>A		non_coding_transcript_exon_variant	4/8	1
GLRA1	ENST00000462581.6	c.*131G>A		3_prime_UTR_variant, NMD_transcript_variant	3/8	1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Jun 10, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.080
CADD	Pathogenic	32
DANN	Pathogenic	1.0
Eigen	Pathogenic	0.94
Eigen_PC	Pathogenic	0.90
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	1.0	D;D
M_CAP	Uncertain	0.23	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Uncertain	0.76	D
MutationAssessor	Pathogenic	3.0	M;M
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.82	D
PROVEAN	Pathogenic	-4.9	D;D
REVEL	Pathogenic	0.84
Sift	Pathogenic	0.0	D;D
Sift4G	Uncertain	0.0030	D;D
Polyphen		1.0	D;D
Vest4		0.99
MutPred		0.97		Gain of sheet (P = 0.1208);Gain of sheet (P = 0.1208);
MVP		0.92
MPC		2.0
ClinPred		1.0	D
GERP RS		5.5
Varity_R		0.90
gMVP		0.85

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

Other links and lift over

dbSNP: rs1057520186; hg19: chr5-151239449; COSMIC: COSV51025286;