NM_000843.4:c.1861C>T

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong

The NM_000843.4(GRM6):c.1861C>T(p.Arg621*) variant causes a stop gained change. The variant allele was found at a frequency of 0.000212 in 1,613,908 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00022 ( 0 hom. )

Consequence

GRM6
NM_000843.4 stop_gained

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:7O:1

Conservation

PhyloP100: 5.29

Publications

12 publications found

Variant links:

Genes affected

GRM6 (HGNC:4598): (glutamate metabotropic receptor 6) L-glutamate is the major excitatory neurotransmitter in the central nervous system and activates both ionotropic and metabotropic glutamate receptors. Glutamatergic neurotransmission is involved in most aspects of normal brain function and can be perturbed in many neuropathologic conditions. The metabotropic glutamate receptors are a family of G protein-coupled receptors, that have been divided into 3 groups on the basis of sequence homology, putative signal transduction mechanisms, and pharmacologic properties. Group I includes GRM1 and GRM5 and these receptors have been shown to activate phospholipase C. Group II includes GRM2 and GRM3 while Group III includes GRM4, GRM6, GRM7 and GRM8. Group II and III receptors are linked to the inhibition of the cyclic AMP cascade but differ in their agonist selectivities. Mutations in this gene result in congenital stationary night blindness type 1B. [provided by RefSeq, May 2018]

GRM6 links:

ENSG00000254035 (HGNC:):

ENSG00000254035 links:

ZNF454 (HGNC:21200): (zinc finger protein 454) Enables sequence-specific double-stranded DNA binding activity. Predicted to be involved in regulation of transcription by RNA polymerase II. Predicted to be active in nucleus. [provided by Alliance of Genome Resources, Apr 2022]

ZNF454 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 16 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PP5

Variant 5-178986393-G-A is Pathogenic according to our data. Variant chr5-178986393-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 5840.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GRM6	NM_000843.4 link	c.1861C>T	p.Arg621*	stop_gained	Exon 9 of 11	ENST00000517717.3	NP_000834.2
ZNF454	XR_007058600.1 link	n.5644-3354G>A		intron_variant	Intron 5 of 5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GRM6	ENST00000517717.3 link	c.1861C>T	p.Arg621*	stop_gained	Exon 9 of 11	5	NM_000843.4	ENSP00000430767.1

Frequencies

GnomAD3 genomes

AF:

0.000125

AC:

AN:

152228

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000723

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000576

Gnomad EAS

AF:

0.000579

Gnomad SAS

AF:

0.000620

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000118

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000148

AC:

AN:

250250

AF XY:

0.000170

show subpopulations

Gnomad AFR exome

AF:

0.000124

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.000299

Gnomad EAS exome

AF:

0.000163

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000212

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000221

AC:

323

AN:

1461562

Hom.:

Cov.:

AF XY:

0.000212

AC XY:

154

AN XY:

727092

show subpopulations

African (AFR)

AF:

0.0000597

AC:

AN:

33480

American (AMR)

AF:

0.0000671

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.000230

AC:

AN:

26126

East Asian (EAS)

AF:

0.0000756

AC:

AN:

39696

South Asian (SAS)

AF:

0.000185

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.0000376

AC:

AN:

53146

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.000246

AC:

273

AN:

1111986

Other (OTH)

AF:

0.000281

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

104

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<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:

0.000125

AC:

AN:

152346

Hom.:

Cov.:

AF XY:

0.000134

AC XY:

AN XY:

74498

show subpopulations

African (AFR)

AF:

0.0000721

AC:

AN:

41594

American (AMR)

AF:

0.00

AC:

AN:

15312

Ashkenazi Jewish (ASJ)

AF:

0.000576

AC:

AN:

3472

East Asian (EAS)

AF:

0.000580

AC:

AN:

5168

South Asian (SAS)

AF:

0.000621

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000118

AC:

AN:

68020

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

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:

0.000206

Hom.:

Bravo

AF:

0.000181

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000173

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000273

EpiControl

AF:

0.000119

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:7Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Congenital stationary night blindness 1B

Pathogenic:3

Mar 29, 2005

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Génétique des Maladies du Développement, Hospices Civils de Lyon

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

20A1176 -

Nov 01, 2019

Revvity Omics, Revvity

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Pathogenic:2Other:1

Mar 02, 2024

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; This variant is associated with the following publications: (PMID: 25525159, 22008250, 31980526, 31589614, 15781871, 17405131, 31677249, 33749171) -

Aug 05, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change creates a premature translational stop signal (p.Arg621*) in the GRM6 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in GRM6 are known to be pathogenic (PMID: 15781871, 16622103, 22008250). This variant is present in population databases (rs62638214, gnomAD 0.03%). This premature translational stop signal has been observed in individual(s) with congenital stationary nightblindness or Leber congenital amaurosis (PMID: 15781871, 30718709). ClinVar contains an entry for this variant (Variation ID: 5840). For these reasons, this variant has been classified as Pathogenic. -

Retina International

Significance:not provided

Review Status:no classification provided

Collection Method:literature only

- -

Leber congenital amaurosis

Pathogenic:1

Apr 01, 2018

Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:research

- -

Retinal dystrophy

Pathogenic:1

Apr 29, 2019

Blueprint Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.43

BayesDel_noAF

Pathogenic

0.62

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

Eigen

Pathogenic

0.81

Eigen_PC

Pathogenic

0.68

FATHMM_MKL

Uncertain

0.94

PhyloP100

5.3

Vest4

0.92

GERP RS

5.0

Mutation Taster

=3/197

disease causing (ClinVar)

(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